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I am in the preliminary design phase of a heavy-lift octocopter. Is there a systematic approach to selecting the proper propeller, motor, and battery for the given configuration provided that the frame size is still variable, the required payload weight is W and the endurance is T minutes?
All of the above parameters are coupled so I am guessing this will be an interactive solution. Any suggestions?
Thank you in advance for your advice and guidance,
Filippos
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Hey,
I recently came along the "Lego Serious Play" Method and I wonder if anyone uses this method for team building or conceptualizing/ designing new visions for a team in there research infrastructure? Or does anyone even uses this method for their lectures?
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Sorry, l don't
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Dear there,
I am conducting research on portable oil skimmers, I have used QFD to obtain the technical specifications from the customer's requirements. I have 3 conceptual designs now and I have to choose the best design via the AHP analaysis. However, I am very confused about how to set the weightage of each criteria.
My criteria are:
1- efficiency
2- Durability
3- Manufacturability
4- Safety
5- Cost
6- Portability
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Dear M. Dhahir,
Check this template and my research paper, they may come in handy for you.
Best Regards,
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hi there, am having a electrical vehical design class and i dont know anithing about electric motors .am asked to do a calculations of a a conceptual design of an electric motor and battery for an electric pickup truck and i dont even know where to begin.i tried looking for semilar designs but every design i have seen ether have diffrant resuolts in another place or have missing info.
it would realy help if you could give me just the first step so i can track it or may be an asstimati of the sizing of the motor that i can work with, or like preferd power , coefficince and torque in such vehicle
tahnk you.
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I think this answer will help you.
1) If you want to use four wheels and motors, to carry 500kg weight, you have to find out the power rating of single motor.
2) To get the exact motor rating, first you need to calculate exact mass of the whole system. In your calculation, you did not consider,
a) mass of the wheels
b) mass of the motor itself
c) mass of the carrier or trolley
3) In your calculation, you calculated the effect of friction one time, but for four wheeler you need count this effect four times, or simply calculate the force for a single motor.
4) If we consider the weight of other things except 500kg load is 100kg (I don't have idea about the actual weight of the motor), then total weight of the system = 600 kg-weight.
Weight over a single motor = 600/4=150kg-weight
Total frictional force= 150*9.8*0.8= 1176 N= f(k)
Remember, to start your carrier, you have accelerate at from 0 velocity. And to accelerate the car, you need to apply greater force than f(k).
Let you want to speed up your carrier to 1m/s for 0m/s within 20s. Then the acceleration is=(1-0)/20=0.05m/s2
Now, the required force for a single motor will be= f(k)+ma =1176N+150*0.05=1183.5N
Then the torque will be = F*d = 1183.5*0.101=119.5335=120Nm approximately.
Now, you need to calculate the required power of the motor by using this formula
P=wT; where w=2*pi*N/t
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Researchers experiment with individual and group of designers. In 'engineering design' what are pros and cons (in general) for doing experiment with two designers in a group? By engineering design, I mean a design problem based on mechanical, industrial design etc. By solution, I mean concept generation.
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Modern engineering design education today relying primarily on the project-based coursed, performed by the group of students. For a reason. It is almost impossible to imagine a relevant industrial task implemented by one (even skilled) individual. It's simply not a real-life scenario.
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Is it true that a theoretical framework must only consist variables with similar unit of analysis (UoA)? Hence, having variables with different UoA is regarded as wrong approach. For instance, having variables such as organisational performance, human resource management strength and employee engagement in a framework are not acceptable, as it comprise individual and organisational level UoA in a framework. I just found this out from a conference I have attended recently.
Thank you.
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The unit of analysis can be an individual, group, industry or country. In other words from whom you gather data for your research. For example if you gather data from executives then the unit of analysis is executives.
Theoretical framework consists of variables.
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I want be sure about my approach.
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At this moment I use the following iteration phases (not steps):
(i) Exploring & tackling the problem, (ii) Inventorying and creating concepts, (iii) Biding the time, (iv) Reformulating design question & adjusting concepts, (v) Selecting concepts, (vi) Anchoring concepts and (vii) Testing concepts.
For more (step/phases) models see my publication: Handstorm principles for collaborative working, page 20.
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I'm looking for software (preferably free!) to use to help me draw good-looking conceptual diagrams for publication. I typically default to Word or PowerPoint but their drawing tools don't offer the kind of functionality and professional look I've seen in some publications.
By 'conceptual diagram' I'm referring to something between a mind map and flow chart. Think about the kinds of diagrams people use to explain the structure of a thesis, or to model an information flow, or to present a conceptual framework...
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You can use http://draw.io . it's very flexible and easy to use.
Thanks.
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Can someone please explain what is A-R-A model in short. The Wikipedia information is deficient. It would be great to discuss applications and how one can apply this model in the industry.
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Please read the article available at:
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  • Would this be a topic that is too broad for a research study?
  • What conceptual design would work best? Phenomenological or ethnography?
  • When you picture a "flat organization" what comes to mind?
Does the perception of AI progression cause a lack of digital congruence, "thus" intensifying fear of risk within flat organizations?
Thank you for your opinions.
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By updating much of Huserlian phenomenology and epi-phenomenology, I have been conducting ample experimentation on this issue which Your Ladyship mentions in her question for the last 11 years. Thus, I have actually arrived at a completely fresh version of anthropology ............
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I am in process of writing my first conceptual paper, need your help in identifying the key ingredients to write a conceptual paper where no empirical data OR case study is available.
Regards
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Please read - MacInnis (2011), which is a seminal paper on writing conceptual papers in marketing, but equally applicable to other areas. All the best!
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The development of complex technical objects is a multidisciplinary process. Usually development is accompanied by the requirement to satisfy a number of criteria, i.e. it is a process of multi-criteria optimization. Among the criteria there are a number of qualitative requirements. In addition, when defining a number of object parameters, there may be no clear rules, recommendations and methodologies. The possibility of applying fuzzy methods at this stage is connected with this. This raises my question about articles or books in connection with this problem. Please do not write about the application of fuzzy logic for the development of control systems, controllers, etc. This is all well known. Thank you!
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Dear Alexander,
I suggest you to see links in topic.
-Integrating a fuzzy-logic decision support system with bridge ...
-Analysis and data processing at the stage of conceptual designing of ...
-A Survey of Fuzzy Techniques in Object Oriented Databases - IJSER.org
-Advances in Conceptual Design Theories, Methodologies, and ...
-integrating fuzzy-logic decision support with a bridge information ...
-Fuzzy Theory Systems | ScienceDirect
-Designing and Modeling Fuzzy Control Systems - Semantic Scholar
Best regards
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We are planning riyadh city as water sensitive urban city. We have developed urban water balance model. How we can get help in applying your model?
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ournal articles and conference papers (and links where available) are available under open access arrangements where possible. Otherwise please contact your institution’s library, the authors, or publishers to organise full access.
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I am not sure whether my indirect effects (dashed arrows) are displayed correctly, as it points from the independent variable directly to the dependent and not through the mediator. There are my hypotheses in the attached picture, just for better understanding.
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Dear researchers,
I am implementing design of experiment ,full factorial ,however after analyzing ,there is no sign of factor for predicting model. Actually software(design expert) dose not consider proposed factor for building model.
How can I consider my factors for proposed model in design expert?
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  • Explore more fundamental features of the software
  • Explore the makeup of a CCD (Central Composite Design)
  • Explore some other RSM (response surface methodology) design choice
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Any suggested authors/websites/journals?
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You might see my PhD 2014 thesis on-line at QUT Library for substantial list of references.
title of my research was " An examination of microfinance self help groups and the poorest of the poor women in Tamil Nadu, India"
regards.
Gordon.
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Methods based on functional decomposition and morphology belong to the so called systematic design methodology. They are widely taught in accademia, but their diffusion in industry has not reached the same success. Some hypothesis have been formulated by literature, but it is still not possible to identify concrete reasons.
What do you think about that?
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Because everyone believes that without these methods, you can still design well. There is no comparison between design following a design method and not following. (How can we vigorously compare?)
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I am doing research on aircraft conceptual design and aerodynamic optimization. it is very time consuming to generate meshes for complex geometries. i want to apply the mesh free CFD method to the optimization, such as smoothed particle hydrodynamics (SPH) method. could anybody suggest me some articles on mesh free CFD method? progress in this field, advantages and disadvantages of mesh free method?
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You can read first some good books on mesh free methods :
An introduction to mesh free methods and their programming by G.R LIU and Y.t GU
Smoothed Particle Hydrodynamics: A Meshfree Particle Method by G. R. Liu, M. B. Liu
Fluid Mechanics and the SPH Method
Theory and Applications
Damien Violeau
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  • I want to know specifically of problems in a tabloid chair for left-handed users and I want to know what are the solutions that have been done to overcome this problem for the tabloid chair for those left-handed users. The new design of tabloid chair for left-handed
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Thank you so much Napoleon and Mark for the feedback. Really appreciate and it helps me a lot :D God bless...
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The question (obviously) is in two parts:
Firstly, drawing on the theories around design thinking, in particular within the logical reasoning framework (deduction, induction, abduction) expounded by Nigel Cross, Kees Dorst and N.F.M. Roozenburg), what activities would be carried out by a designer which facilitate creative design and problem solving? What actions and graphic tools (mapping, sketching, diagramming and modelling) would this entail?
Secondly, can these activities be organised in such a way to formulate a method which can be applied in multiple design situations?
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Filippo Salustri's suggestion of Christopher Alexander's seminal book, Notes on the Synthesis of Form, is a cracking one. I based my PhD thesis on the work of Alexander, albeit for slightly different reasons. I have had a book published recently with Laurence King Publishers, London entitled Research Methods for Product Design that includes many methods for facilitating creativity, generating ideas, analysing ideas and communicating those ideas to others. You can find the book on Amazon here - http://www.amazon.co.uk/Research-Methods-Product-Design-Portfolio/dp/1780673027/ref=sr_1_1?s=books&ie=UTF8&qid=1422519406&sr=1-1&keywords=research+methods+for+product+design
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If so, how does it work?
I'm currently doing research regarding architectural atmospheres which I'm focusing on light where I found this quite interesting after I read a couple of articles about "Church of Light" designed by Tadao Ando, where he uses light to increase the occupants' awareness/feeling of the spiritual and secular within themselves.
I'm planning to dig deeper into this topic.
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I build greenhouses and sunspaces in the pacific northwest.We have long cool grey winters and it is common for people to experience depression during this time. When given access to a sunspace with lots of natural daylight these symptoms seem to be greatly reduced.
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I have been doing extensive research on the writings of Nigel Cross, Kees Dorst and N Roozenburg, who indicate that abductive reasoning is at the core of the creative design process.
Diego Fullaondo also supports this assertion in his Deakin University Lecture "Elementary Dr Watson"
How can abudctive reasoning be practically applied in the design process?
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One can easily get over prescriptive when discussing these types of thinking in relation to design.   Kees and the others are certainly wise to assert that abduction plays an important part in design thinking.  However we must be careful not to assume induction and deduction are either not used or not important.  I suggest that good designers have a very flexible thought strategy and can flip between these types of thinking often without even being aware of what we observers might think a crucial difference.
as for examples of abduction in design I think there are two important categories.  My one time research student jane Darke famously described the phenomenon of the primary generator in design.  This is a sort of glorified guess about the form of solution that might be helpful.  They then learn about the problem by exploring this.
Kees and I have stressed in our book design expertise that design education understandably concentrates on developing a knowledge of design solutions.  It's a kind of reverse engineering process in which problems are explored through solutions.
one can also see the idea of frames as pioneered by schon and his followers as a kind of abduction.   If we frame the situation this way maybe it will be helpful.
this is a good question Rod in the sense that one could easily write a whole book on the subject.  Perhaps you should have a go!
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In conceptual design phase dead load, live load ,earthquake load, and wind load are the must important factors to fix a initial size of column and shear wall, In my research work i want to develop a generalization network that could find the most appropriate size of column, thickness of shear wall,
Now i have a question to those experienced engineer , which factors like seismic zone,wind categories, live load, dead load, strength of concrete, strength of steel reinforcement, are the most effecting factors to choose the initial size of these components??
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Not an easy issue... Lot of parameters are involved and surely an iterative procedure is needed. Prior, a structural typology must be defined. This is done based on seismic zone, wind zone, use and height of the building, suitable construction techniques, etc. Then, the next step is to analyze dead and live loads in order to define minimum element dimensions and also to define appropriate concrete quality. Only then you are able to analyze total shear and to begin improving structural stiffness and ductility. I recommend you to read some works related with performance based structural design, like the following
Good luck with your research!
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Engineers often like to use "best practices" (data, information, knowledge, wisdom) during product development. Some of the data/information come from their experiences working on the job. Others (best practices) are derived from analytical, functional, logical or physical phenomena.
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Hello,
our research team has experiences from industry cases. Most successful cases are when the workshops are facilitated. We use cause-effect mapping capturing the most important product parameters and how they interact.These are connected to customer needs.
The engineering knowledge changes from tacit to explicit in these sessions also. This enables the company to validate the design reasoning for their products. Then the company has better ability to manage the design and the properties of the artefact i.e. the product.
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I am looking to obtain some paper relating to the use of architecture or architectural elements that can shape or even influence public behaviour and/or emotions. The topic is immensely brief at this stage and I want to dig deeper into this topic. It is my belief that to some architecture has become irrelevant and that some people have adopted the somewhat stereotypical "four walls and a roof" syndrome. My idea is to lend a different perspective on what architecture really is and how it can provide that "WOW factor" besides just being shelter for the human population.
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try these...
The field is Environment psychology and its champion as been in the last 20 years Kopec and also Juhani Pallasmaa, Omer Akin, John Hall, rassmussen and of course peter zumtor.
You can find some lectures and even a full course on EP in youtube.
good readings
Luis
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I need to provide information about how to develop a conceptual framework. Any suggestions?
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Conceptual framework. Well I think it depends a bit on what science you are coming from (I am a social scientist with some biology background) Conceptual framework is as I see it an explanation of how you see the concepts of issues that you are going to research are interlinked with each other. In natural science it would in several ways be quite close to your hypothesis but may be a bit broader taking into consideration and explaining what the "parameters" of the hypothesis are and how they are interlinked. In social qualitative science it is more an explanation of how you see the concepts you examined are interlinked. A good way to start an analytical framework is to do a brainstorming and put the concepts you want to examine up on a paper and then start to develop their interlinkages (that can be hypothesis).