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How to make buildings resistant to earthquakes?
Now in Iran, according to my suggestion, Unilit roof is used in the roofs of residential and office buildings, which is very light. I took this suggestion in an article for the seismological organization in Tehran and gave 14 suggestions to prevent the Tehran earthquake, including 2 They implemented it. One of them removed the bricks from the roof of residential and office buildings and put unilite and poured concrete on top of it, which is very resistant because there is a round rod inside the bits and it was mixed with concrete, and I also said that in metal buildings from 7 or 8 should be used next to the walls because it makes the Masguni houses stronger and also 2 parking spaces should be used under the buildings, like palm trees or dates, which have deep roots and will not fall during an earthquake. Buildings must have deep roots and also in the science of retrofitting structures, divergence is used, that is, natural or artificial rubber is used under the pillars of the houses, and steel springs are used in the middle, so that during an earthquake, the building, like a car or A car that has a spring and the springs play, the building goes up and down but does not fall, and this is a building engineering science that makes buildings resistant to earthquakes and natural disasters. And secondly, through the injection of water and salt solution, the energy of the faults can be removed. Because it comes from the earth's core, which has 6000 degrees Celsius of heat. At any moment, this heat transfers to the surface of the earth. Therefore, the energy inside the earth must be removed, and by transferring the water and salt solution that all the oil extraction companies have, which is known as the injection of water and salt solution, like a tiny needle that is inserted into a balloon so that the balloon does not burst, we humans can create an artificial earthquake. Let's prevent the earthquake explosion and create an artificial earthquake ourselves and release the pressure inside the earth. And 3, we should not build residential or office buildings where there is a fault line, because the buildings are heavy and the taller and bigger they are, the more pressure is placed on the faults. So either we have to build a single floor or not at all to prevent an earthquake from happening.
Wisam Fawzi added an answer
I saw that this technique is used in most Iranian structures and my personal opinion is a successful technique.
László Attila Horváth added a reply
Did you used technics of Ioannis Lymperis ?
László Attila Horváth added a reply
Did you used technics of Ioannis Lymperis ?
Ioannis Lymperis added a reply
The Ultimate Anti-Seismic Design Method
The design mechanisms and methods of the invention are intended to minimize problems related to the safety of structures in the event of natural phenomena such as earthquakes, tornadoes, and strong winds. It is achieved by controlling the deformations of the structure. Damage and deformation are closely related concepts since the control of deformations also controls the damage. The design method of applying artificial compression to the ends of all longitudinal reinforced concrete walls and, at the same time, connecting the ends of the walls to the ground using ground anchors placed at the depths of the boreholes, transfers the inertial stresses of the structure in the ground, which reacts as an external force in the structure’s response to seismic displacements. The wall with the artificial compression acquires dynamic, larger active cross-section and high axial and torsional stiffness, preventing all failures caused by inelastic deformation. By connecting the ends of all walls to the ground, we control the eigenfrequency of the structure and the ground during each seismic loading cycle, preventing inelastic displacements. At the same time, we ensure the strong bearing capacity of the foundation soil and the structure. By designing the walls correctly and placing them in proper locations, we prevent the torsional flexural buckling that occurs in asymmetrical floor plans, and metal and tall structures. Compression of the wall sections at the ends and their anchoring to the ground mitigates the transfer of deformations to the connection nodes, strengthens the wall section in terms of base shear force and shear stress of the sections, and increases the strength of the cross-sections to the tensile at the ends of the walls by introducing counteractive forces. The use of tendons within the ducts prevents longitudinal shear in the overlay concrete, while anchoring the walls to the foundation not only dissipates inertial forces to the ground but also prevents rotation of the walls, thus maintaining the structural integrity of the beams. The prestressing at the bilateral ends of the walls restores the structure to its original position even inelastic displacements by closing the opening of the developing cracks.
Article The Ultimate Anti-Seismic Design Method
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Miguel Angel Morales added a reply
July 9
There are two ways to achieve it. To start, we can make buildings more ductile, that is, they can withstand stronger deformations without failing; On the other hand, we can design more rigid structures, which implies that the buildings resist greater accelerations.
These systems consist of elements for energy dissipation or assimilation. The first type of system seeks to increase the capacity to "lose" energy, such as the "Saint Andrew's Cross" trusses, and others work as seismic dampers or isolators.
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Khawaja Muhammad Iftikhar added a reply
July 25
Abbas Kashani
Miguel Angel Morales
To make buildings resistant to earthquakes, it is essential to incorporate various engineering principles and design practices. Here are the key steps and considerations in detail:
1. Site Selection and Soil Analysis
- Site Selection: Choose a site with stable ground, avoiding areas prone to liquefaction, landslides, or fault lines.
- Geotechnical Analysis: Conduct thorough soil investigations to understand the soil properties and behavior under seismic loads. This includes soil borings, lab tests, and evaluating soil-structure interaction.
2. Building Design
- Seismic Codes and Standards: Adhere to local and international building codes (e.g., IBC, Eurocode, IS Codes) that specify seismic design requirements.
- Structural Configuration: Opt for simple, regular, and symmetric building shapes to ensure even distribution of seismic forces.
- Redundancy and Robustness: Design for multiple load paths so that if one path fails, others can carry the load.
- Foundation Design: Use deep foundations like piles or caissons in soft soils to reach stable strata. Consider mat foundations for better distribution of seismic forces.
3. Structural Elements
- Base Isolation: Install base isolators to decouple the building from ground motion, reducing seismic forces transmitted to the structure.
- Energy Dissipation Devices: Use dampers (viscous, friction, or tuned mass dampers) to absorb and dissipate seismic energy.
- Flexible Joints: Incorporate expansion joints to allow sections of the building to move independently, reducing stress concentrations.
- Shear Walls and Bracing: Use reinforced concrete shear walls or steel bracing systems to resist lateral forces.
- Moment-Resisting Frames: Design frames that can withstand bending moments and shear forces during an earthquake.
4. Materials and Construction Quality
- High-Quality Materials: Use materials with appropriate strength, ductility, and durability. Reinforced concrete, structural steel, and composite materials are commonly used.
- Reinforcement Detailing: Ensure proper detailing of reinforcement bars in concrete to prevent brittle failure and enhance ductility.
- Construction Practices: Follow best practices and quality control during construction to avoid defects and ensure the building performs as designed.
5. Retrofitting Existing Buildings
- Seismic Assessment: Evaluate the seismic vulnerability of existing buildings using detailed analysis and field surveys.
- Strengthening Techniques: Employ techniques such as adding shear walls, bracing, jacketing columns, and using fiber-reinforced polymers to enhance the seismic resistance of existing structures.
6. Innovation and Technology
- Advanced Simulation Tools: Use computer modeling and simulation tools to predict building behavior under seismic loads and optimize designs.
- Smart Materials: Incorporate materials with adaptive properties, such as shape memory alloys, which can absorb and dissipate energy efficiently.
7. Community and Lifeline Considerations
- Building Codes Enforcement: Ensure strict enforcement of building codes and regulations.
- Public Awareness: Educate the public and stakeholders about the importance of seismic-resistant design and construction.
- Lifeline Infrastructure: Design critical infrastructure (e.g., hospitals, emergency response centers) to higher seismic standards to ensure functionality after an earthquake.
By integrating these principles and practices, engineers can significantly enhance the earthquake resistance of buildings, thereby reducing the risk of damage and loss of life during seismic events.
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Sebastian Schmitt added a reply
20 minutes ago
Khawaja Muhammad Iftikhar, do you really think that a random, AI-generated answer is helpful for Abbas?
…
Who is controlling it? Are there any reviews?
HUMOROUS MORPHOLOGY
In Lewis Carroll’s Alice’s Adventures in Wonderland, the Gryphon used the word “uglification,” and Alice asked the Gryphon what the word meant. The Gryphon was amazed that Alice didn’t know this word. He asked Alice if she knew the meaning of “beautification,” and Alice responded that she did, but she still didn’t think that “uglification” was a real word with a real meaning. Indignantly, The Gryphon said that a word means whatever you want it to mean, and then he went on to give other examples. He said that what is taught in the schools is “reeling,” “writhing,” “uglification,” and “derision.”
Teachers should be called “tortoise” because “they taught us.” Lessons are called “lessons” because they lessen every day. In Wonderland, “Latin and Greek” are called “Laughing and Grief,” and “drawing, sketching and pointing in oils” becomes “drawling, stretching, and fainting in coils.”
The Watergate Hotel is where the break-in of the National Democratic headquarters occurred. Today’s dictionaries give more room to the metonymous meaning of Watergate than to the literal meaning of “a gate controlling the flow of water.” “Gate” has now become a suffix meaning “scandal” as in Irangate, Contragate, Iraqgate, Pearlygate, Rubbergate, Murphygate, Gennifergate, Nannygate, Monicagate, ad infinitum.
On National Public Radio’s “Cartalk,” Click and Clack are playing with Morphology in their list of credits: Copyeditor: Adeline Moore, Accounts Payable: Ineeda Czech, Pollution Control: Maury Missions, Purchasing: Lois Bidder, Statistician: Marge Innovera, Russian Chauffeur: Picov Andropov, Legal Firm: Dewey, Cheetham, and Howe.
Another kind of humorous morphology is when words are translated (actually transliterated) from one language to another. “Un petit d’un petit / S’étonne aux Halles” makes no sense in French, but it makes perfect humorous sense in English: “Humpty Dumpty / Sat on a wall.”
In summary, the inflectional and derivational morphology of English Nouns, Verbs, Adjectives, Adverbs, and Pronouns have an amazing capacity to morph into other Nouns, Verbs, Adjectives, Adverbs, and Pronouns.
Can you think of other humorous examples of English words morphing into other words?
Don and Alleen Nilsen “Humor Across the Academic Disciplines” PowerPoints:
Variable x is a controllable, and variable y is a random varialbe. Also, y=b*x+u, and u is a random iterm. So x and y is correlated. But, if we calculate the covariance between x and y, according to the definition Cov(x,y)=E[(x-Ex)(y-Ey)], the value should be zero. Since Ex=x.
Is the conclusion correct?Thanks
I have seen in some articles that they use DMF, Water, DMSO and PEG, so I wanted to know that What are some other solvents that can be mixed with them for controlling the edge of GQD
Controlling a mobile robot, in various environment by using 5G communication technology, as a link between the controller to the mobile robot?
Looking for genes that are involved in controlling stomatal density under drought stress.
Weiner reckoned that there were three dimensions concluding six elements of his attribution theory. One of the three dimensions was controllability, i.e. whether the elements can be controlled or not. However, there are not absolutely controllable or uncontrollable situations in our daily life. Practically speaking, people sometimes can only partly control something.
Hi everyone,
I have a SLM and It seems to be dead. When I open the controlling software and try to change the phase of the SLM, there is no response back to our software. I tried to restart it few times and nothing changed. Does anyone know how to test the SLM to be sure that it is really dead or not?
Best,
Lien Ung
I am working as a Packing line executive. And we are packing shade colors(Red and Yellow). As we are packing both colors in a single line. We are using mass flow meter based filing machines(The machines without hopper, the paint from the pigging line will directly comes out from the nozzle and fill in containers)
Thus we are facing pressure fluctuations a lot....
And while pigging, there are so many over fillings and splashes
Can anyone please tell me some controlling methods to these problems?
What are the issues that determine the NS3 Simulation time? I mean can we reduce it? can we increase it? who is controlling that? I have read many research papers, that set the Simulation time to 1800 seconds!
My respect.
How to calculate the gain matrix of Luenberger /state observer?and also what is the role of eigen values during the mathematical modeling?
The current system have 2 input and 2 controllable states. The system is observable.
Hello Everyone. I have recently been trying to tackle the issue of a tilt rotor aircraft control and developing a set of PID controllers for that. I have attempted to use this simulink model but it didn't work for me.
I am specifically having a problem in controlling the transition of the aircraft a it stands. Do you know of any matlab simulink models that I can use as a reference for control architecture?
Soot pollution has been a peculiar hazard of Niger Delta in Nigeria.
Does it mean that there is no advanced and innovative solution to soot pollution and its control?
Researchers of the globe, kindly recommend the novelty on controlling soot occurrences in an urbanized society such as Nigeria.
Hi!
I'm trying to synthesize 2.5 dinitroterephthalic acid in the following way:
Gradually add 8.28 grams of terephthalic acid to approximately 25 ml of h2so4 by magnetic stirring, then slowly shrink the nitro mixture (10 ml of h2so4 + 30ml of controlled temperature of hno3 + at 0 ° C) into the dough. and control the temperature <5 ° C. At the end of the dripping process, start the reflux mixture at 130 ° C and continue using the magnetic stirrer for about 12 hours. The reaction mixture is then added to the water / ice mixture. Filter the solution and neutralize to pH = 7, then extract the solution with ethyl acetate (theoretically, the 2,5 -dinitroterephthalic acid product will go into the ethyl acetate section and take it to evaporate to evaporate ethyl acetate. 2,5- dinitroterephthalic acid products will be obtained). However, during vacuum evaporation, I did not receive any crystals or just 2-nitroterephtalic acids.
I have been doing it for over a month with no results. Hope everyone give me some advice?
Thank you very much!
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Dear all,
I am running several bivariate linear regressions to measure the impact of biases on controlling processes. These are all significant. I would like to measure which cognitive bias has the greatest impact on controlling processes. Can I compare the beta weights of different bivariate regression models to find the bias with the biggest impact? My dependent variable always remains the same.
I have searched for hours for information but unfortunately found conflicting information.
Thanks in advance!
to electrify rural areas cost effective power generation is important. from those alternatives MHP generation using SEIG will fulfil the community power demand in lower cost. but SEIG hve the problem of voltage regulation during load variation. to regulate terminal voltage IG there are different way of classical controling method but how to control the voltage using artificial intelligence to andvance the controling system to protect power electronics equipments that are sensetive to voltage varation.
Can you please provide any documents for a brief comparison between film and droplet condensation regarding the heat transfer and the controlling equations?
I just need to support my claim that replacing film condensation by droplet condensation improve the heat transfer; as droplet condensation on a flat plate eliminate/reduce the thermal resistance formed by the film condensation.
Can a real picture of the road maintenance system be obtained in this way of monitoring and control? What other method would you recommend for monitoring and controlling road maintenance?
I've been waiting for years for the Mathworks to provide a toolbox/functions to control flatbed scanners (Epson, HP...) through their Twain interface. Mainly for use with dedicated Image Analysis based applications I have developed.
The first questions/requests were raised almost ten years ago but still ... nothing available.
So I was wondering if anybody came across this issue for Epson scanners and whether they found a way to interface Epson's Twain libraries with MatLab (using a wrapper or any other trick) ?
Dear Sir,
Requested to share GITHUB page to understand the algorithm.
Thanks
Anbu
Software Defined Wireless Network (SDWN) now days allow central controlling of wireless network, can this technique replaces the working of other networks (e.g. AdHoc, Mesh, ... etc) in only single principle called SDWN?
Hi everyone!
I would like to ask which control design method is more effective for controlling the steer-by-wire system? I am planning to use the MATLAB/Simulink.
Thank you in advance for your answers.
Hello!
I have a sample size of 23 people which consists of 2 independent groups (control vs. experimental). I have data for both of the groups at two time points (pre-intervention and post-intervention).
I wanted to perform an ANCOVA to analyse the results of two group pre-test and post-test study design (comparing the post-test results between the two groups while controlling for the pre-test results). However, my dataset does not meet the assumption of homogeneity of regression slopes which will make the ANCOVA statistic value invalid. I read about the Johnson-Neyman procedure as an alternative to ANCOVA when this assumption is violated but it is not possible to do it on SPSS.
Are there any other valid tests and ways to analyse two group pre-test and post-test design in that case?
Thank you!
Hi everyone,
I’d like to know if there is a way to compare dependent partial correlation coefficients.
I used partial correlations to test, in a single sample, whether three personality traits (X,Z, W) were associated with a series of variables (let’s just call them Y), controlling for 4 control variables + the other personality traits. So, when I tested the correlation between X and Y, I controlled for the 4 control variables + Y and Z. All measures are continuous.
I’d like to test whether the rXYis significantly different from rZY or rWY. I found this equation to compare dependent correlation coefficients:
tdifference =(rxy-rzy ) √(((n-3)(1+rxz))/(2(1-rxy2-rxz2-r_zy2+2rxy rxz rzy)))
However, I am not sure I can use it with partial correlations coefficients.
And if I can use it with partial correlations, what should I use as the correlation between X and Z (rxz)? The zero-order correlation coefficient? Or the partial correlation one (controlling for the 4 control variables and the third personality trait)?
Thank you in advance for your help!!
Hi
How can i correct this error?? I think it's about matrix dimensions for port e.
Error in default port dimensions function of S-function 'FeedbackLinearization/Controller'. This function does not fully set the dimensions of output port 2
I'm running a simulation based on feedback linearization control method that comes from a paper attached below.
the model is also attached.
Anyone help me, helps a poor student. (if it makes sense lol)
There are 4 continuous DV, some categorical variables like gender ( boys and girls), educational status of father (3 levels), educational status of mother (three levels), income ( three levels). I want to know effect of first categorical variable after controlling rest 2 or 3., effect of second variable by controlling rest.
Hello everyone,
I am currently working on the state of the art of the digital twin concept, and after seeing the categorization made by Kritzinger, W. et al. (2018) [ ] and reading several articles, some doubts have come to my mind:
- According to the definition, we can speak of a "true" digital twin as long as the data flows between an existing physical object and a digital object are fully integrated and automated in both directions. However, I have found articles where the developed digital twins, instead of acting or controlling directly their respective physical twin, they send warnings or recommendations to a person so that s/he performs the corresponding actions. Hence, to my understanding, there is no an automated flow of information from the digital twin back to the physical object. In this cases, should we consider the developed digital twins as real or as digital shadows instead?
- Regarding the composition of digital twins, is it possible a digital twin to be internally composed of several digital twins? To exemplify this, we could think of a factory that builds a certain product, which is composed of several components that already contain their own digital twin implemented from the supplier. Therefore, we could consider that the digital twin of the final product is, among other things, the composition of all the digital twins of its components. I ask this because I have not seen this property widely developed throughout the literature. Instead, it is common to see that the digital twin is composed of physical and/or data-driven computational models and data that describe in real time the behavior of its physical counterpart.
- Does it have sense to speak about the lifecycle stage in which a digital twin is framed (Design - Development/Manufacturing - Operation/Service - Dismissal/Retire) if it does not represent an object/product? As an example, we could think about the digital twin of an industrial process, of a human being, of disaster management in an Smart City, etc. In my opinion, it does not make sense...
Thank you so much in advance
According to the FEMA356 and ASCE41-17 (3.3.3.2), we have to push the structure 150 percent greater than the target displacement!
In this case, controlling the performance level of plastic hinge seems uneconomical. Why do the CODES refer to this paragraph at all?
Which modes are controlling the flutter? What the flutter mechanism is and how can the flutter speed be increased? Any hint and examples to the questions above? Thanks
Hi, I have a simple question.
I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as our outcome variable, Ie we will use an "ANCOVA" designs showed to increase power: https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-019-3671-2
Would any body be able to point me towards the best tool for sample size estimation for such a model?
thanks!
I am using PI controller in feedback control of a SEPIC DC-DC converter to get fixed output voltage in a SIMULINK model. It's not working.
Hello
I'm currently trying to create a chi-map using topotoolbox for matlab. In the available literature most of the calculations use a single mn ratio (0.45-0.5) for the entire area, and some others do a sensitivity analysis in order to get the best mn ratio per watershed. However, I don't know whether the calculations would improve using the best mn ratio per stream or it really doesn't matter because the sensitivity analysis is good enough in a calculation per watershed.
By the way, I'm working in an landscape highly controlled by faults activity.
Any comments will be appreciated.
Best Regards
Lester
When using the mean value of the 3 LVDT's it often happens that the mean value stays constant but the individual LVDT's can behave completely different. From a local point of few it will not be a constant deflection test. Why not performing a short test of e.g. 500 cycles to determine which LVDT shows the maximum value. Afterwards the test will be carried out using that LVDT as the controlling device for a deflection controlled UTC test. Of course, it can happen that during the test another LVDT value may become bigger than the control LVDT value. That's a pity and that test is in principle lost. But for me although you look at local effects it might be better. I'm curious for response on this question.
Given the current level of infection and spatial distribution, after controlling government responsiveness to control, can the level and rate of infection serve as proxy for countries level of international integration or connectedness?
There is a theory saying that emotions are controlled by the right side of the brain and logic is controlled by the other side. Is the brain really divided into two sides when it comes to controlling different aspects of human behaviour?
I am trying to conduct a power analysis in g-power to determine a sample size for my honours thesis, but I don't know how to do so. I am planning on conducting a hierarchical, multiple logistic regression.
I am predicting men's identification as victims of female-perpetrated intimate partner violence based on their attitudes towards female dating violence, ambivalent sexist beliefs, precarious manhood beliefs, and the degree of battering they experienced. I am planning on controlling for the frequency and severity of the abuse by entering those predictors in step 1 of my hierarchical regression, before the entering the predictors previously listed. Based on my current study design, I believe I have six predictors (I'm assuming I include the predictors I'm controlling for?) and they are all continuous.
DV: Identification with intimate partner victimization (yes/no)
Predictors (Control) - enter step 1: severity of abuse, frequency of abuse
Predictors (IV) - enter step 2: attitudes towards female dating violence, ambivalent sexist beliefs, precarious manhood beliefs, degree of battering
I am not sure how to conduct a power analysis in g-power for a logistic regression, I know there is an option for it under z tests, but after that I'm lost in regards to what numbers to input into the various fields. In addition, I'm not sure if running this as a hierarchical regression has an effect on my power analysis.
If anyone has any information on how to conduct this analysis in g-power, I would greatly appreciate it, and if you need any other information from me, please let me know :)
I am fabricating a solar car powered through both solar panels and a supplementing DC power source.The details of the components is as below:
Solar Panels (Q=2) : Pmax=100W ,Vmp=18.9V ,Imp=5.29A
Battery (Q=2,Series): 12V - 50 Ah:Model UB12500
DC charger : 12V-4Amp
Motor: 24 V,4.8 KW.
1. I want to connect the three power sources (2 Panels+DC) (Parallel Connection) through a combiner box and directly send it to charge controller to charge the battery pack.
Can this be done and if this process is correct please provide me some tips for this approach?
2. Another suggestion I got is to use a switch so that I can charge them separately ,can you also provide some insights into it?
I am trying to develop a controller model for Battery charger in Simulink which include both Constant Current and Constant Voltage Method.
I have two separate PI controller for CC & CV charging method. Problem I face is to identify how two controller interact ? i.e. during constant voltage charging if the controller only look at voltage setpoint even if current output is beyond the limits the voltage controller doesn't get affected by it.
How the controlling is done for CC/CV charging of Lithium Ion battery in general ? Will be helpful to get any information.
Thank You.
Sreeraj Arole
I work on MPC controller for tiltrotor Airplane but I have some issues in C programming,I have previously programming a PID controller and I want to know if is there any relation between what I have doing and the MPC programming
Hello everyone, I am measuring KBr in a PIKE FTIR which has a temperature chamber, I am remotely controlling the relative humidity inside the chamber by keeping the Thermostat temperature at 57 degrees and I have an external heater which i keep at 65 degrees. I had some unusual activities in my spectra. I would like to know what could be the issue
Is it possible to control the dq component of the three-phase grid-connected PV system using Proportional Resonant control?
I want to extract Hop count, link utilization and random placement from Topology zoo data set, and I have no idea how to do that. additionally, i'm going to use that criteria for SDN controller placement problems in matlab.
Dear colleague, Electric vehicles in today's world are leading with special controlling mechanism which are easily operated for every one. Even-though, they are vital and they do have better control mechanism still in our country Ethiopia there is shortage of electric vehicles. Therefore , what are the challenges in Electric vehicles to implement in Ethiopia for mass production?
At present all the world is experiencing weather extremes due to the impact of the climate change. Who is responsible for those consequences of extreme weather in all over the world? finally who is ready to face all these effects by Govt./People? Why all the Govts are not focusing on immediate controlling strategies? Not identifying causative factors in the world? How long will take time to clear our world environment? Why all the Govts not strictly controlling in the ground level before effluents entering into the environment? Why effluents are not treating/estimating properly? How it becomes more dangerous to human life and environment in all over the world?
So, my main question has to do with the following task. I have a system basically that describes the motion of a rigid body non convnsional UAV. Using a thruster in the z-axis and for cannards to deflect the outcoming flow. It can be described as a ducted fan UAV. SO, I have set a trimming point with all the derivatives equal to zero in Simulink and specify an altitude for hovering, basically this has to do with steady state conditions. My dynamics are closely connected with these of a 6-DOF system, and my output vector is of 12 states (Euler angles position velocities angular rates....)
Using that opereation point I am trying to conduct the linearization of the equations on Simulink once again. Whenever I am using as the output states anly angular velocities 'p,q,r' and euler angles 'phi, theta, psi' in order to design an attitude controller my results say that matrices a,b that refering to my system are described as controllable as well as observable.
On the other side of the coin though whenever I am just add three quantities more, like position in inertial frame 'x,y'z, or velocities u,v,w my rank of controllability reduces to 2 giving me at least 7 uncontrollable states each time. That means that the system is uncontrollable.
Also if i only linearize using quantities of the state vector of position x, y, z anf euler agnle psi in order to make a position controller, still the whole system is uncontrollable.
So in a few words. Whever I specify states that have to do with position and velocities system is uncontrollable.
Also whnever I am using the quantities from euler equation, like euler angles and angular rates system is controllable.
Why is that??
i have a mathematical model of the controller placement problem and i want to write a program using C as a language of programming,
this program he can find the optimal number of controllers that must installed in a Software Defined Network (SDN) and i don't know how to model the of switcher and the set of controllers in this program.
Hi all,
I have a model with 8 control variables one predictor and one outcome. Adding all 8 of these variables to the model really complicates the model. Is there any reason, I couldn't create a partial correlation or covariance matrix controlling for all 8 variables and analyze that with SEM? Instead of including all 8 controls in the SEM itself, I could just control for them in the matrix that I input for analysis. That would allow a model that has one path instead of 9. Does this yield equivalent results?
Thanks! Loren
Textural nature of soil is an important controlling factor of river bank erosion.
Hello,
In MIMIC models, can coefficient between covariate and indicator when controlling latent be estimated by direct paths from covariate to indicator? do you mind to take a look at my model attached? Thanks in advance,
Hello,
Currently I am searching the literature for advantages and disadvantages of the IPOO framework, the Balanced Scorecard and the Puplic Sector Scorecard. My goal is to achieve a comparison on which I can make a decision for an implementation. Does anyone know of a paper in which such a comparison was made, or a where some of the pros and cons are discussed?
I am doing an ecological study and I have found two variables that are related with a disease. However, since these two variables are closely related (one causes the other), controlling one for the other showed a cancelling of their correlation with the disease. Is it okay to simply put the bivariate correlation?
I am working on vehicle suspension system and I am stuck at finding the controller gain using LMI toolbox. can anyone help me out?
I am trying to model nonlinear, cyclic behaviour of a cantilever beam, I wish to apply a cyclic load at the free end. And I want the midpoint of the beam to be displacement controlled (ie. reverse loading direction once the displacement at midspan reaches predetermined values).
How can I do this?
I have a Simulink model and I want to use the output block port Ex. queue length as a vector of observations for controlling the flow. Connecting the output port to a Bus Creator or Mux block is not supported.
Thanks in advance
Hello fellow scholars,
I've recently been thinking of ways to control for gender in regression in a non-binary way (i.e. not male=0 female=1) to account for people who identify themselves in other ways. What would be the best approach to do this? I've been googling, but the thousands of results that appear were not helpful in anyway. Thank you in advance for the suggestions, and source material.
I'm currently doing research work on Automatic water dispenser, I proposed to design and implement the system that will control a solenoid valve, operated by ultrasonic sensor and display the water level as well. How can I have a program that will perform the two tasks together; controlling the valve and displaying the water level?
IV(1) in my cross sectional observational study is a significant positive predictor for the DV in linear regression, and IV(2) is a significant negative predictor of the DV.
IV(1) has a positive pearson correlation with the DV, however when you do a partial correlation controlling for IV(2) the correlation between IV(1) and the DV becomes non-significant. (this relationship does not occur in the other direction, a.k.a correlation of IV(2) and DV, controlling for IV(1) remains the same and significant)
I'm confused as to why the correlation becomes non-significant when controlling for IV(2), but when both the variables are in predictors in the regression they remain significant independent of each other.
Why is this the case, and how would you suggest going about interpreting this?
Thanks!
What do you think about the outbreak of coronavirus? Will the outbreak stop in China soon? Will there be an effective vaccine soon? Does the international community succeed in controlling it? What are the negative effects
What do you think about the outbreak of coronavirus? Will the outbreak stop in China soon? Will there be an effective vaccine soon? Does the international community succeed in controlling it? What are the negative effects of this disease on the international community? Please share your opinion.
Hello all,
in order to bring my bachelor thesis up to the current state of the art, I am looking for studies that show the positive influence of Innovatons controlling/ performance measurement on the success of a companies. Can anyone help me?
Kind regards,
Samuel
Hello everybody,
I am currently writing my bachelor thesis in a start-up funding program at my university. In the course of this work I decided to measure performance either by using the Balanced Scorecard or the Input-Process-Output-Outcome model.
I wanted to get a few opinions on this. Do you think that the two programs are at all comparable? I chose the two frameworks because they are both very popular in the literature and more importantly because both frameworks can be implemented without the use of financial indicators.
Do any of you know of a paper in which the two frameworks are discussed, or even better, compared?Unfortunately I have not yet found a paper in which both were treated equally.
I would like to thank you for your support in advance and wish you all a good start into the week.
Kind regards,
Samuel
Does the accuracy of system identification affect performance of controlling an object in control engineering?
For example, I did system identification and obtained matrix A, B, C, D using method A and the cross correlation with the actually measured data is 0.6.
And we did the same thing with method B and we have got the cross correction 0.8.
In this case, we can say that for system identification, method B is better than method A.
Usually in this case, can we get a better control performance result using the A, B, C, D matrix from method B compared with A?
Hello everyone,
As part of my bachelor thesis, I am currently reading the literature on performance measurement, since I would like to implement such a system in our start-up initiative. Can anyone recommend me a book/paper which shows the introduction of an Input-Process-Output-Outcome system or the Balance Scorecard at a real example in practice?
That would help me so much !! Thank you !
Kind regards,
Samuel
Hi guys , I am using low resolution camera 120x160 FLIR camera ( active thermography using external heat source or lock in ) , I also want to use matlab to directly conect to the camera , but i confuse on how the control would be. where need to control the light and simultaneously take the real time video and using matlab to do image processing . can use booth matlab and rasbery phi for this purpose ? any body could share their experience. thank you so much. or i do it wrongly ?
Hello there,
I am currently searching the literature for methods to analyze the project progress of a startup funding program organized by the university. In doing so, I discovered that all except the milestone analysis and the milestone trend analysis actually work with the cost factor. For example, the "Earned Value Method" was frequently mentioned in the literature and my professor also said that it was possible to use the this methode without using costs.
My problem is that I can't find any evidence in the literature that this method could be implemented without costs. Do you have any suggestions? Or do you still know methods that I could use to measure project progress (without the cost factor of course)?
Kind Regards,
Samuel
hi there, currently i am doing my research. my supervisor has suggested me to include industry effect as a controlling variable. my question is how can i include this specific variable in the regression model? is there any calculation for this particular variable. i have taken non financial sector of Pakistan which comprises of 14 sector comprises of 369 firms. please suggest any particular method.
I am trying to apply battery storage in PV system, so the battery should be able to switch between charging and discharging to support the PV fluctuation.
I heard it can be controlled using BDI(bidirectional Inverter), but I do not understand how to set the control from using 3 phase Inverter block in simulink.
1. My question is in matlab how can generate pulses in secondary side hv bridge in LLC Resonant converter ?
2. We got without synchronization means Primary side full bridge switches and secondary side rectifier diodes working well.but primary side full controlled switches and secondy side also controlled switches how can generate pulses in same switching frequency .
3. how can controlled both directions in both LLC resonant converter using synchronization rectifier ?
Please help me sir any body or suggest me
Hi everyone, I need to introduce a delay in the control system response. Currently I have this behaviour:
timestep 1
Output control function =1 --> the pump switch on.
Instead of this behaviour I want a delay, meaning:
timestep 1
Output control function =1 --> the pump is still switched off.
timestep 2
the pump switch on even if at this timestep the output control function is =0, due to the delay in the response.
I am using type 2 as controller and I have tried type 93 for the delay but I don't know how to use it. Could someone help me?
A lot of processes are evolved in Electrospinning, such as evaporation of the solvent. Currently, parameters are chosen emprically. So one of the question is how to make electrospinning more controllable. Does anybody tried electrospinning at a cleanroom environment? Does it make a difference?
Xiaomi Fimi A3 drone has 6 pieces of DIY ports but there is not any info about them in the user manual. We want to control the drone by a microcontroller or microcomputer and we don't know that we can do with these ports. If it is possible, is there a tutorial document or user manual?
I want to know how to tune the PI controller in case of parameter estimation,
let say i have equation Ls=[Kp+Ki/2]*[VdEd+VqEq]
so how to estimate Kp and Ki value for better performance of the whole system
I am working on the MRAC system For ac machines
Looking forward for guidance and technical help
What factors can be controlled the availability of cadmium (as spiked such as 6, 12 and 24 mg/kg) in calcareous soil with pH 7.44 and available P 19.65 mg/kg? (other results of soil that used for pot experiment was attached)
Hello;
Is it possible to apply the energy management for DTC controlled induction motor drive?
Thanks and best regards
Hi,
I am currently writing a bachelor thesis at a university sponsored start-up center on the subject of innovation controlling. I would like to measure the success of the Startup Center with KPI's and methods. In the literature, financial indicators are mostly needed for this, but in my case these would be irrelevant, as the matter is publicly funded.
Are there methods that you could recommend that can be implemented without financial indicators? And which performance measurement system could be developed? Is it e.g possible to do the Balance Scorecard without the dimension finance? Also if you could recommend literature I would be very thankful!
Thank your very much for your help!
Kind regads,
Sam
I notice that the plants in our temperature controlled room were having problems. It looks like pest attack on the rice panicles. Does anyone know what pest this is? and what type of pesticide that i can use?
But when i just increased the controller gains by a fold of 100 the system was seem to be controlled. The system was measured with a difference of (0.002 milliseconds)
We had several different types of recorders deployed this summer (Soundtraps vs. dip hydrophones) and compared the spectrograms of controlled playbacks of whup calls across units and distances. Unsurprisingly they came out looking vastly different on spectrograms. It was easy enough to "hear" that they were the same call, but this is going to be an issue that we need to resolve. Thoughts?
i want to find the losses of complete circuit which consist of inverter , HF transformer,switches resistance and also a PI controller .
we can approximate an infinite-dimensional system with a finite-dimension system, (for example by proper orthogonal decomposition)
If we stabilize the approximate finite dimension of an infinite-dimensional system (such as a PDE), by stabilizing the controller, does this controller stabilize the infinite-dimension system?
or if it is not possible, how should we stabilize an infinite-dimensional system?
I have designed a control system for a based on the paddle displacement and I have been asked whether the controller would cause overshoot of force. I'm not sure whether it is possible to get the overshoot of force from the model because both the input and output of the system are displacement (x) rather than force (f). Any idea?
while I am designing the droop control strategy for switching of the inverter, to show power flow between dc-ac and ac-dc side, I have noticed in most of the paper they have taken three-phase voltage and current as a reference after the LCL filter output from the inverter, they have transformed abc-DQ(in both voltage and current controller) frame why? and from three-phase, they have transformed into a single-phase dc component?
I am currently working on a project,volt-var controlling for distributed energy resources (mainly for photovoltaic systems). Even though I have an algorithm to work on, there is no way to control the active and reactive power of a PV system. I hope for an answer. Thank you in advance.
In virtual flux based direct power control of three-phase converter the powers are estimated based on the virtual flux and currents and switching states of the converter. Practically in laboratory when we are running we are providing the voltage lesser than dc bus voltage reference and once the control loop started working we are increasing the three phase voltage to that level. But when we are installing the inverter at home, firstly we are charging the inverter and then control is applied . once the dc bus voltage is fully charged it will not draw the current from the three phase supply then how virtual flux based dpc for inverter control is working because it needs currents to estimate the flux and based on the flux theta angle is computed to synchronized the inverter with the grid.
In case of rectifier it is easy as the resistive load is connected across the dc bus, But how the initialization and control will takes places in case of three-phase inverter with virtual flux based dpc.
Hello all
I am doing my master thesis on model predictive control. I am controlling the quadruple tank system using the model predictive control. I have done with the hardware design by using arduino and stuffs like that and the MPC design has done as well. But the problem is, how to implement the hardware system with MPC design. Looking for the solutions for my issue. Thanks in advance
Hi
Dear Jie Ren
I have some questions from you about hydrochar production.
Autoclave can be used instead of stainless-steel reactor?
Autoclave can temperature and pressure conditions be controlled for 4 hours for produce hydrochar?
How many bar does 500 ml of pressure?
The bottle contain organic matter and deionized water for produce hydrochar when placed inside the reactor should be completely closed ?
Thanks from you for giving me more details of hydrochar production.
How to implement a discrete-time controller to a state delayed continuous-time state-space model using ODE45 in MATLAB?
Where can I find standard dimensions for dental posts and abutments? I only need the typical dimensions, so just a general dimension would suffice. In addition, functionally graded (FG) implants with controlled porosities in them are used in the dental industry. Is there a standard guide on the implant designs/ dimensions of FG implants?
Thank you.
What if the pendulum angle set-point of a inverted pendulum (IP) is not zero? Have you ever tried it?
If the result is the same with the zero set-point , Does it mean that the system is controllable but not accessible?
the base position (with ref value at zero), and the base acceleration
The Raspberry Pi is used as a central controller for customer face recognition. Both, the Raspberry Pi 3 and ODROID-XU4 come with a quad-core ARM Cortex-A7, but the extra clock speed and RAM in ODROID-XU4. it supports 4K videos .So,As an alternative is it be beneficial to use ODROID-XU4 instead of Raspberry Pi?
I want to calculate the capacitive and diffusive contributions of graphene-NiCo2O4 composite, so, for this I have to consider the specific capacitance (F/g) or specific capacity (C/g or mA h/g) value. Some reports have specific capacitance value (F/g) and some are in C/g or mAh/g, also some reports have calculated specific capacity (C/g) from cyclic voltemmetry, and specific capacitance (F/g) from charge-discharge curves in the same report, hence I am in doubt. So, please help me in this regard and if any recent literature is available for clear understanding kindly provide me.
Thank you.
