Actuators - Science topic

low curing temperature is preferable

ICMTIM 2024 will be held once a year, aiming to bring scholars, experts, researchers and technicians in the academic fields of "mechatronics" and "intelligent manufacturing" together into an academic exchange platform, and provide a platform to share scientific research results, cutting-edge technologies, understand academic development trends, broaden research ideas, and strengthen academic research and discussion.

The topics of interest for submission include, but are not limited to:

TRACK 1: Mechatronics Technology

· Mechatronics Control

· Sensors and Actuators

· 3D Printing Technologies

· Intelligent control

· Motion Control

......

TRACK 2:Intelligent Manufacturing

· Modeling and Design

· Intelligent Systems

· Intelligent mechatronics

· Micro-Machining Technology

· Sustainable Production

......

All papers, both invited and contributed, the accepted papers, will be published and submitted for inclusion into IEEE Xplore subject to meeting IEEE Xplore’s scope and quality requirements, and also submitted to EI Compendex and Scopus for indexing. All conference proceedings paper can not be less than 4 pages.

Full Paper Submission Date: February 10, 2024

Registration Deadline: March 10, 2024

Final Paper Submission Date: March 25, 2024

Conference Dates: April 26-28, 2024

Hello dear colleagues,

I am looking for a elastic actuator for a robotic arm. It should be able to contribute 1/3rd in lifting the arm with the motor as the motor contributes 2/3rd. It should also ensure safe landing of the arm instead of free fall and also during emergency situations like, if the motor's program is bugged and it actuates in the wrong direction then also the actuator should ensure safe landing. My intial ideas were a spring and damper syste, torsional spring alone but there are some restrictions with them so, please suggest something.

Hi OpenFOAM users! I found that using the actuationDiskSource there is a small jump in the velocity field near the actuator disc cells. I couldnt found a solution on internet. Any help?

For the little I understand of lorentz force is that when high current pass through wires, they tend to electromagnetically attract each other.

So I was wondering if, by passing high current, low voltage (like the "reverse" of electrostatic) one would be able to make an electromagnetic artificial muscle.

I came across this video these 3 videos that shows the effect in different manners:

Would be possible to build a coiled artificial muscle made out of high current passing through copper wire (water cooled to avoid damage) that could both use the lorentz force and the electromagnetic field created by the coil in order to make a contraction similar to a muscle?

how do we give input through piezo actuator for a XY positioning stage

Is there anyone who can help me in finding the appropriate template for this Elsevier journal?

Hi everyone. I’m trying to implement some papers that control a few parameters during runtime. I’m using Gym-Eplus to vary the values but I’m not sure if the following can actually be controlled.

I couldn’t find any relevant actuators in the .edd file created.

Hi, I have made a cylindrical hyperelastic soft actuator which has fibres around the outside at an angle which results in the actuator twisting. I would like to know how much the actuator has twisted by but UR is 0. It only shows the fibre with a UR value. There is no moment applied, only pressure. Actuator is solid homogenous and fibre a beam.

Additionally, how would I be able to obtain the bending angle?

I Appreciate advice given.

how I can calculate the exerted work done by an actuator giving that values of potential akinetic and damping energies are known ?

Dear researchers, I want to simulate a flow (air) in a wind tunnel, and I want to integrate a fluidic actuator inside it in order to control the separation of the boundary layer. At the blower inlet a velocity of 30m / s is imposed and at the inlet of the fluidic actuator of 0.3 MPa is imposed. My question are:

should I use Pressure Based Solver or a Density-Based Solver?

I need to find bending angle of a pneunet made of hyperelastic material with different internal pressures in abaqus, i require a procedure to do so. I tried using angular rotation of nodes (UR) but unable to find rotation.

Dear researchers,

My research area is related to the development of metallic composites. I am switching to sensor development. Basically, I will work on the development of advanced materials for sensor applications. I need your guidance, suggestions, and ideas. I am also looking for collaboration in this area.

Looking for your valuable replies.

This is a boundary control problem of a hybrid ODE-PDE system. The system consists of an actuator, a flexible link fixed to the actuator, and a tip mass at the free end of the link. In most literature, two control inputs are used for the simultaneous position and vibration control of the said system: One is the actuator's torque and the other is a force at the tip mass. The application of a control force at the tip mass of a manipulator does not seem to be a practical solution. Can we use only the actuator's torque to simultaneously control the position and vibration of the beam and the tip mass?

I would be grateful to anyone for sharing any theorem or paper addressing this issue (in support or against).

Thank you!

We reaearch on a soft actuator that has a soft membrane and hydrogen gas as a pressure producer. We test some material (EX: latex and silicone RTV2) for fabrication of membrane, But leakage of the hydrogen through the membrane is a major problem. Is there any soft material for construction of membrane that has not any leakage?

Hi everyone,

I am going to isolate noise and vibration of gearbox with the help of an actuator. Which control board is recommended?

NIST? (National institute of technology)

Arduino,

or something else?

Does anyone know how to build a robot with peristaltic locomotion using soft robotics with soft muscles?

suppose that I have an egg and I want to move that along a short distance using a linear actuator while I should employ peristaltic locomotion for this mass transform.

#soft_robotic

We would like to use Polytech microsystem analyzer (MSA) to characterize the resonance frequency of a fabricated cantilever and compare them with FE. However, the stage of the MSA is passive and we need an actuator to vibrate the cantilever to its resonance frequency. What would people use in such situations? Is there any commercial actuator for this purpose? Or do people design them according to their purpose?

I am undergraduate student current working Shape memory alloy actuator, I am new to ABAQUS UMAT , so can someone share any SMA UMAT or any tutorial regarding modelling of SMA or any examples of SMA model in ABAQUS

Low temperature curing epoxy is preferable.

Hello,

I have a linear actuator which offers 1000-3000 N force but very small stroke in the order of micron.

Is there any solution to convert force to displacement?

Thanks,

If a reinforced concrete beam is being tested under four-point bending. What would be an appropriate loading rate for the actuator if the applied load is load controlled.

There is a soft pneumatic actuator which is made of Hyper Elastic material that I am going to simulate it in Abaqus or Ansys. A fiberglass layer is attached to bottom of actuator. This layer prevents any elongation in both direction (Longitudinal & Transvers ) but allows actuator to bend. How can I simulate it in Abaqus or Ansys ? adding boundary condition or creating property?

I am looking for information on some kind of actuator which can produce about 1 mm displacement while consuming low power, was thinking of piezoelectric ones as they can have "ms" response time. Any leads much appreciated.

Hello,

I have been trying to simulate the active groundhook system in Matlab/Simulink. The force equation for the groudhook actuator force is given by F_gnd = -c_gnd*vel_wheel, where c_gnd is the groundhook gain and vel_wheel is the wheel vertical velocity. However, when I try to simulate the model, the suspension system acts very strange where I see very high values for the sprung mass and also the dynamic wheel loads are very relative to the passive or skyhook model. No matter how small or high my the c_gnd value is, the performance does not improve. Any suggestions on this issue will be appreciated.

Thank you

Virtual Reality based applications can very well be equipped with Sensors, Actuators and other electronic and electric entities. Hence, am looking for IoT and VR together applications for better domestic and commercial needs.

Today, sensors are usually interpreted as devices which convert different sorts of quantities (e.g. pressure, light intensity, temperature, acceleration, humidity, etc.), into an electrical quantity (e.g. current, voltage, charge, resistance, capacitance, etc.), which make them useful to detect the states or changes of events of the real world in order to convey the information to the relevant electronic circuits (which perform the signal processing and computation tasks required for control, decision taking, data storage, etc.).

If we think in a simple way, we can assume that actuators work the opposite direction to avail an "action" interface between the signal processing circuits and the real world.

If the signal processing and computation becomes based on "light" signals instead of electrical signals, we may need to replace today's sensors and actuators with some others (and probably the sensor and actuator definitions will also be modified).

(The example may not be a proper one but I just needed to provide a scenario. If you can provide better examples, you are welcome)

Most probably there are research studies ongoing in these fields, but I am not familiar with them. I would like to know about your thoughts and/or your information about this issue.

There is lot of information on how to simulate a plant and tune the PID controller using Simulink and other apps. However, there is almost no information on how to implement the controller into the main matlab script to directly control the (real) actuator system. Thus, I have simulated the system and tuned the PID controller (through the PID -tuner app) but the implementation of the tuned PID into the main script, which controls the actuator is not trivial (I could not find any information regarding code generation from simulink to matlab). So, the problem is NOT the tuning of the PID controller but the IMPLEMENTATION of the tuned PID controller in the main script. I have found some PID scripts for matlab :

However, since there are so many advanced software and functions related to the tuning of an optimized PID I find it hard to believe that there is no automated procedure to go from the simulation to the real thing.

Can anyone suggest any hints and resources?

In all the papers I've been reading, the dielectric loss is only related to the heat production of the materials under an electric field. This may produce a failure of a device (such as an actuator) by heating it and thus, increasing their electrical conductivity.

My question is related to the effect of the dielectric loss under low voltage in silicone rubber under a system that could dissipate any heat produced. Which will be the real/expected impact on the performance of a transducer device (strain sensor)? How important could this factor be ? (i.e: at 100Hz Ɛ'=40; Ɛ''=10; tanδ = 0.25)

Hello

I am working with piezoceramic actuator to vibrate the flexible substrate but I am confused how to determine the resonant frequencies under loading condition? I am using function generator and amplifier and observe the vibration from the oscilloscope. I know that Network analyzer would help to determine the resonant frequency. But how to do that using NA, if anyone knows, please help.

I am using a SVM (supervised) classifier for internal leakage fault detection and classification of a hydraulic actuator, i am considering 3 stages of fault namely low,medium and high levels of internal leakage the method is as follows

1. first a known level of fault is artificially induced into the system

2. system parameters and signals are obtained

3. the SVM classifier is trained using the obtained results and known fault labels

but since the actuator is in a hydraulic excavator the number of data points the can be obtained is constrained (for example i obtained 40 data of each fault class totaling 120 observations)

Is the use of 120 data points to train the classifier justifiable?

I need to compare the agility of two piezo actuators. I saw a relation between rising time and resonant frequency in the following website: Tmin=1/3f0

According to the formula, an actuator with a higher resonant frequency is more agile.

I need a reference for this formula if it's correct or other relation and reference.

Thank you.

I am trying to do the actuator line modeling (ALM) of a wind turbine. I want to know how can I implement it with Fluent. In ALM, forces are distributed on a rotating line representing the loads on a wind turbine blade. How do I model this?

If anyone could guide me step-by-step on how to do it, I'd be immensely grateful!

Thank you!

1). I am looking for an electric linear actuator that can apply a fixed load intermittently. Example: I have to apply a total load of 5000N. But I want the load applied by the linear actuator with an increment of 500N every after 20 minutes. after the application of intermittent load, the actuator needs to be at the same position for 20 min. I hope I have made my point clear. Can anyone suggest such a linear actuator or a micro-controller that can be attached to the linear actuator for this requirement?

2).can anyone suggests to me a linear actuator that has an inbuilt load cell having a capacity of 10000N.

Thank you in advance!

I am currently working on active flow control methods for airfoils. Please, Can anyone help with how to model SJA's and DBDA's in ANSYS?

I have a linear actuator of 1kN load capacity, 50mm linear travel, and M35X1mm thread at outer body. The spindle has M10 internal threads which is not through (closed end). I am having leakage from inside the actuator. Is it a way that I can transfer the linear motion with 1 micron precision?

Picture attached for current connections

Thank you in advance

Why in the Suzen and Huang's Method For Simulating DBD Plasma Actuators, we need to separate the electric potentials?

Greeting,

I am currently working on a new computational model for DBD plasma actuators; therefore, I was dealing with Suzen and Huang's model to understand the basics and the previous models. I have a question, though.

In the main paper regarding the S&H model, it has been stated that experiments indicate that independent of which electrode the voltage is applied to, and independent of the polarity of the applied voltage, the resultant body force; therefore, the induced flow is in the direction towards the embedded electrode, acting as a cross-flow, thus non-useful force.

Could anyone explain why this is happening?

I know that to capture the useful body force, we need to separate the electric potentials so that in this way, we can build the body force perhaps more accurately. However, I can't figure out why this happens? Are the equations that we try to solve are not sufficient?

I would appreciate any pieces of clarification one may give.

Regards,

Dina Soltani Tehrani

Every time a new robotic project is starting, the team has to spend a considerable amount of time looking for the right components on the market.

We have created a small survey to better understand what are the actuator requirements of the teams building the next generation of human-centered robots (exoskeletons, cobots, humanoids, etc.).

What are the actuator specs you need and what is the best approach, buy off the shelf, customize or design from scratch? Does the market provide enough solutions to fulfill your project requirements?

We would appreciate if you let us know by filling in the form below:

We would appreciate your comments.

Hello all,

I want to simulate a Dielectric Elastomer Actuator DAE (an electrostatic-Structural analysis). I want to apply various voltages and frequencies into the DEA in the form of sine wave. Any help and guidance will be much appreciated as my knowledge in MAPDL is quite limited.

Kind regards,

Dear researchers, I want to simulate a flow (air) in a wind tunnel, and I want to integrate a fluidic actuator inside it in order to control the separation of the boundary layer. At the blower inlet a velocity of 30m / s is imposed and at the inlet of the fluidic actuator of 0.3 MPa is imposed. My question are:

should I use Pressure Based Solver or a Density-Based Solver?

I am currently working on fabricating a electroactive polymer actuator on Si. Cu electrode/ multiple PVDF layers /Cu electrode are deposited on Si. When I am trying to measure the resistance across the PVDF layer, between two electrodes, very low resistance is recorded (2 ohm) in multimeter.

My question is, why the device is shorted?

How to improve on the conductivity of the polymer layer?

Please I have designed Super-twisting and Twisting controller for a system. I want to deduce the advantages and disadvantages of each over the other.

I discovered that one of the controllers have higher gain than the the other to achieve the same performance objectives. Can i say the controller with lower gain has an advantage over the controller with higher gain? Does this translate physically that larger actuator is required for higher controller gain and vice versa? What are other deductions from this observation? Please literature recommendations on this is also welcome.

Thank you

I am working on a project of 6 D.O.F. simulator using stewart platform with rotary actuators(crank), it include 6 servo or stepper motor i am stuck on motors parameters can anyone suggest how to decide motor parameter or any motor or research paper on this  

There is a dopant for the vhb 4910 actuator tapes that have acetylene black or carbon black which is carbon grease (carbon black + pdms) commercially, I am making a robotic actuator but I don't know what is the difference at a chemical level between carbon black and carbon and why In some papers there is talk of a negative intrusive charge which, when placed as electrodes, having a thin layer of vhb 4910 in the middle, these electrodes are attracted by the high voltage that is applied, causing the vhb to be crushed, stretching or changing shape by attraction but I don't know why that dopant is the only one that works for the vhb 4910 and because it has that intrinsic charge or what is that intrinsic charge

An analogue voltage sine wave signal is send from a PLC to a Piezo actuator. This actuator converts the voltage to force. A load cell checks what the applied force is and sends a mA-signal accordingly to the applied force. I was wondering if it's possible to get a sort of (PID) control with the load cell as feedback?

I am trying to simulate Dielectric Elastomer Actuator by applying cyclic loading onto the Elastomer in terms of (various voltages and frequencies) and find the deformation of the Elastomer, I already defined my material using the curve fitting tool in ANSYS you can see that in the attached photo. Now, I Frankly don't know how I can preform this simulation I can not find any references or tutorials.

If you can help me with anything will be much appreciated. Thank you

P.S: The material I am using is Sylgard 184.

Thank you again!

Hi all,

Can you please explain the "Dynamic Pull-in" concept in electrostatic parallel plate MEMS actuators? I would like to know "in detail" about its causes and effects. How is it related to the "Static pull-in"?

Regards,

Raghu

I use a piezoelectric actuator for active control of a flexible structure, and measure the vibration amplitude at the same place using an accelerometer. When actuating the structure with a shaker, I see less noise, but when actuating with the piezoelectric actuator, there is too much periodic noise in the response, and it is not usable.

Any idea how I can reduce or remove it?

I tried to surface bond piezoelectric actuator patch with CFRP laminated composite specimen using standard aredlite (two part epoxy adhesive).

But i am experiencing a short circuit problem at a 2000V and that might be due to adhesive. The spacing between electrodes is 10 mm and these PZT patch shows no short circuit problem when they tested bare (without surface bonding) at 3000V.

Any suggestion will be great help.

I am simulating a pneumatic actuator that has a spiral to get a torsion movement. I am using hyperelastic materials. I have tried to use shell elements, but I can´t mesh the assembly. Any suggestions on how to get the torsion angles for the assembly?

Hello!

Can someone please help me? I am trying to tilt a multilayered structure (piezoelectric actuator), but I get each layer tilted, looking like in attached pictures. Is there any possibility to tilt the whole assembly (unified structure) as a whole?

P.S.: I used Cartesian coordinates.

I am grateful for any useful suggestion!

We all have been accustomed to see a block diagram for a linear control system, where in the forward path, first sits the controller, then actuator, and then plant.

What if we flip the blocks of actuator and plant. I mean what if we place plant before actuator?

We know that, the closed-loop transfer function does not depend on the consecutive order of blocks in forward path, since: C(s)/R(s)=G(s)/(1+G(s)H(s)), where G(s) is the forward-path gain and H(s) is the feedback-path gain (sensor). The forward path gain could be decomposes as:

G(s)=Gcontroller(s)*Gactuator(s)*Gplant(s).

Therefore, since these transfer functions in forward-path are multiplied, then it does not differ what are their consecutive order.

Hence, let's flip the plant and actuator blocks in the forward path: G(s)=Gcontroller(s)*Gplant(s)*Gactuator(s).

What happens next? Nothing about the stability, but a great revamp of the required embedded system and controller design. Because instead of measuring plant out-put to send it into the feedback path, we only need to measure actuator out-put which is more convenient through the control engineering practice. In other words, we have mixed controller and plant blocks together, to establish a new controller which physically controls the actuator.

For stabilization, I think it works well. For example, assume an aircraft autopilot (controller). Through this revamped controller design, instead of measuring and regulating aircraft states as pitch-rate, we only measure and regulate actuator (elevator) deflection. If we can stabilize the elevator angular position to stay at zero, then we have stabilized the aircraft at a level-flight (stabilization), since zero elevator-deflection means level flight has been sustained.

For command following (not stabilization), we may set a mathematical trick as:

G(s)=Gcontroller(s)*Gactuator(s)*[Gplant(s)/Gactuator(s)]*Gactuator(s),

in this way, even for the case of command following (control) we still need to only measure actuator output.

Advantage:

- in the classical loop, we use actuator model as a software block in the controller simulation and design, while using plant as a hardware to be regulated by physical sensing of its output.

-in my revamped controller setup, we use plant model as a software block in the controller simulation and design, while using actuator as a hardware to be regulated by physical sensing of its output.

It seems physically sensing and regulating actuator dynamics, would be much convenient than physically sensing and regulating plant dynamics.

Please share with me, your comments and ideas about my plan.

I want my piezo actuator to give a sinusoidal load as output and thus keep the forces (max, min and mean) constant. To do this I need a close loop control with a load cell I think. However the controller only has a strain gauge sensor. So I want to know how I can make the load cell and controller communicate via LabView (programming software which can do force control). Which components am I missing?

Piezo actuator: https://www.physikinstrumente.com/en/products/linear-actuators/nanopositioning-piezo-actuators/p-845-preloaded-piezo-actuators-101215/

Piezo controller: https://www.physikinstrumente.com/en/products/controllers-and-drivers/nanopositioning-piezo-controllers/e-625-piezo-servo-controller-driver-604100/

load cell (DCE-500N): https://www.lcmsystems.com/dce-stainless-steel-stud-type-tension-and-compression-load-cell

analog load cell amplifier: https://www.lcmsystems.com/sga-analogue-strain-gauge-amplifier

I have a piezo actuator for a micro fatigue test which should give a sinusoidal load output. But I don't know how you go from displacement controlled to load controlled with the actuator. The actuator is closed loop via a strain gauge and there is a load cell to control the loads on the specimen.

Hello,

Given a system with redundant actuators, what would be the names of techniques that I could research to use each actuator for different frequency bands?

To illustrate the problem with a simple 1-dimensional problem, consider the attached picture. We have a mass m moving in 1-dimension connected to two redundant actuators. We want to regulate the position x while rejecting a disturbance W_d. In addition, we want to use the first actuator U₁ to reject low frequency disturbances and the second actuator U₂ for high frequency disturbances only. In other words, we do not want to use the second actuator U₂ at steady state.

So far, I have come across Härkegård's work, such as [1], that explores dynamic control allocation. This discrete-time technique provides a way to penalise both high and low frequency usage of an actuator by adjusting the weighting matrices in its quadratic-programming cost function. They illustrate this technique by designing an aircraft control system for a fighter aircraft with a delta-canard configuration. The controller is designed to result in no canard deflection at trimmed flight to achieve low drag.

I am currently looking for other techniques that could be used to 'partition' the frequency usage of redundant actuators in order to get a more holistic view of the topic before committing to a single technique. I am looking at both techniques that separate the controller design and control allocation problems and ones that combine both.

Any suggestions of technique names or terms I could research would be much appreciated.

Thanks in advance for any suggestions.

Kind regards.

References

[1] Härkegård, Ola. (2004). Dynamic Control Allocation Using Constrained Quadratic Programming. Journal of Guidance Control and Dynamics. 27. 10.2514/1.11607.

I have a robotic system that is not actuated in one joint (no torque is applied) and actuated in all other joints.

In this model, the blue rectangles are the links of the robot, the filled small circles are the joints and the circle slot is a constraint that the slider is rotating around it. The red filled circle and the red slot are connected to the ground but the red filled circle is a motor that produces torque. Among other joints, 2 of them are actuated and one is just a joint and isn't actuated.

The slider is applying force to the circular slot to remain on the track. This constraint force consists of a force toward the center of the slot and a moment in the direction perpendicular to the figure.

I want to solve the forward dynamics (by having the joint torques, I want to obtain all link's angular accelerations) to convert it into a state-space form. It is preferable for me to be able to obtain the constraint forces in the slider, also. I don't want to use ordinary newton's method. What other methods do you recommend me to use and why? Please remember that this system is a closed-lop kinematic chain and not a tree-structure (serial kinematic structure). I will be grateful if you introduce good references for the method you recommend.

Thanks

I am using a circuit with the output of 8kV and 18kHz. The power output is 40W. I am having a problem with the excess heating of electrodes and due to this reason, cant operate the actuator for an extended period of time. How do I mitigate this problem?

Your help will be deeply appreciated.

Thanks in advance

Dear researchers

I can model tuned mass damper (TMD)in opensees platform. Now I want to model active mass damper (AMD) in opensees. So, how can I model its auxiliary equipment including sensors, control computer systems and actuator?

I am simulating wave propagation in a plate. In that process, I need to apply nodal displacement in the radial direction at the actuator position. I entered the wave excitation signal in the amplitude module. But when I am trying to select the displacement direction, I am not finding any option to apply radial displacement. I have attached the image of what I want to achieve. If anyone can help me out, I will be grateful.

A closed-loop system (with feedback), and "actuator saturation". The poles and zeros of the system change when the system goes into "actuator saturation" behavior?

Thanks a lot for your feedback

I plan to use V-REP together with python for the development of trajectories in 3D CAD models, the path I will trace on the CAD file and generate a DXF file of it, Python would process it to enter the trajectory in V-REP.

Would someone recommend me any resources to learn how to program V-REP? Or how could I link between the DXF file, Python and V-REP?

Is ECU connected to can? Can we program it through AUTOSAR?

And if we have up to 70's ECU in car so it means we don't have a brain here?

What is sbw-Center ECU then?

Gravity describes the deformation of our living space, which is a continuum that can be deformed and can be vibrated. Some vibrations deform temporarily. Others don't. Vibrations that deform the continuum locally add at least temporarily some volume to the continuum. That deformation spreads over the continuum and thus, the deformation quickly fades away. However, the vibration permanently expanded the continuum. Locally a spherical shock front adds a volume to the continuum. If the shock front is triggered by a point-like actuator, then the front integrates into the Green's function of the continuum. This Green's function has a volume. The continuum can be described by a quaternionic function. In the imaginary part of the quaternionic parameter space, the addition of the Green's function increases the difference between the quaternionic function and its parameter space.

In a huge dense and coherent recurrently regenerated swarm of triggers the Green's functions will overlap. The deformation will equal the convolution of the Green's function and the location density distribution that describes the hop landing locations. This deformation is significant and it is persistent. If the swarm moves, then the deformation will accompany the swarm.

hi, i want to simulate dbd plasma actuator with suzen-huang model, but i dont know what is the true boundary condition? 

Dear Researchers.

I am looking for a way on how I could derive an equation that relates pressure and bending angle for the soft pneumatic actuator that I am developing in my project. The actuator that I am modeling is a hemicircular type. And I wanted it to be segmented, like a finger that I could individually control each joint. There is a mutual movement when I pressurize one of the joints of the actuator. Therefore, other joints, which are not yet actuated move when one joint is being actuated. The Illustration is a model of one joint. The whole actuator is a homogeneous soft actuator run in FEA. The pressure applied in the each chamber in a joint is radiates in all directions on the walls of the chamber. The base is assumed in-extensible, therefore, does't elongate. The interaction between the outside walls of the chambers produces bending when inflated.

Thank you for your help.

If a neuron expressing an optogenetic actuator is light-stimulated in the soma, will this lead to neurotransmitter release of this same neuron?

Good evening all,

I have started working with pneumatic muscles very recently. I do not have much knowledge in this area for which I need your expert opinion and guidance. Please suggest me the way out to start from the beginning towards controlling the actuation and developing the mathematical model of the actuator.

With regards,

Bhaskar Ghosh

Hello everyone,

I am trying to simulate cyclic loading in the steel frame which consists of one beam and two columns. Actually the cyclic load (in lateral direction) is applied using an actuator in practical. My job runs successfully when mesh size of beam and column is 50 mm but when i reduce it to 40 mm, the job gets aborted stating " Too many attempts made for this increment".

The analysis has been terminated due to previous errors. All output requests have been written for the last converged increment.

Abaqus/Standard Analysis exited with an error - Please see the message file for possible error messages if the file exists. ".

I tried following methods but none of them worked

i) Increase IA to 30

ii) Finer mesh in contact region.

Please enlighten the most probable solution when there is decrease in mesh size.

Please help!

Thank you.

Hello dears

Please guide me about:

I want to transform the original system into two subsystems (subsystem-1 and 2), where subsystem-1 includes the effects of actuator faults (fa) but is free from sensor faults and subsystem-2 only has sensor faults (fs).

X'=AX+BU+Efa