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How can I do a motion analysis of a 4wheeled device?

Question asked by Joana Alves on Aug 11, 2016
Latest reply on Aug 12, 2016 by Gianluca Mattaroccia

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Hi!

I am having troubles with the motion analysis of a 4wheeled device. I put a rotary motor on one of the wheels (all the wheels are solidary with each other). But it seems I cannot make it right, I don't know what I am doing wrong.

Also, I wanted to know if it is possible in this analysis to evaluate the velocities, accelerations as a force is applied to the device (in a way it can be seen in the figure in attachment). Or, as well, the stress in the material through the movement of the device.

The device was made in SW 2016, SP0. I put it attached.

Thanks for all the help!

Gianluca Mattaroccia Aug 11, 2016 10:44 AM

Correct Answer

Hi Joana,

I was able to make a simulation out of your model. You had several mating issues that I corrected as you can see in the file.

I did add a motor and the forces as you were looking to. Please make sure the parameters in your simulations are correct, I did not spend enough time in actually setting the simulation for real results. I only wanted to make sure you could simulate the assy.

Let me know

Gianluca

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Walker.7z.zip1.0 MB

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Gianluca Mattaroccia Aug 11, 2016 9:13 AM

Joana,

you may want to make sure your wheel can actually roll onto a plane and not just spin in free air.

I will look into you model and see what can be done.

Gianluca

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Gianluca Mattaroccia Aug 11, 2016 10:44 AM

Hi Joana,

I was able to make a simulation out of your model. You had several mating issues that I corrected as you can see in the file.

Let me know

Gianluca

Attachments

Walker_GM.zip2.3 MB

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Joana Alves @ Gianluca Mattaroccia on Aug 11, 2016 1:43 PM

Hi Gianluca,

many thanks for your reply and your help. Yes, I will now correct the parameters in my simulations.

I take the opportunity to ask if there is a way to study the consequence of those two forces in the velocity of the device? Also, can I do a simulation for the stresses (in the parts) in parallel with the motion analysis?

Once again, thanks.

Joana

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Gianluca Mattaroccia @ Joana Alves on Aug 12, 2016 7:36 AM

Hi Joana, it depends what type of parameters you will assign to your motor. You will need to define a Torque setting (acceleration and speed) and evaluate the max speed the cart will reach. But to get numbers that have meanings you will need to take into account, friction bearings in your bushings and between ground and wheels.

Of course you can evaluate the stresses importing the reaction forces and bearing loading from Motion to Simulation.

Make sure you take care of any redundancy in your mates otherwise all you do is worthless.

Good luck

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4 Replies

Gianluca Mattaroccia Aug 11, 2016 9:13 AM
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Correct Answer
Joana,

you may want to make sure your wheel can actually roll onto a plane and not just spin in free air.
I will look into you model and see what can be done.

Gianluca
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Gianluca Mattaroccia Aug 11, 2016 10:44 AM
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Correct Answer
Hi Joana,
I was able to make a simulation out of your model. You had several mating issues that I corrected as you can see in the file.
I did add a motor and the forces as you were looking to. Please make sure the parameters in your simulations are correct, I did not spend enough time in actually setting the simulation for real results. I only wanted to make sure you could simulate the assy.

Let me know

Gianluca
Attachments
- Walker_GM.zip2.3 MB
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- Joana Alves @ Gianluca Mattaroccia on Aug 11, 2016 1:43 PM
  Mark Correct
  Correct Answer
  Hi Gianluca,
  
  many thanks for your reply and your help. Yes, I will now correct the parameters in my simulations.
  I take the opportunity to ask if there is a way to study the consequence of those two forces in the velocity of the device? Also, can I do a simulation for the stresses (in the parts) in parallel with the motion analysis?
  
  Once again, thanks.
  Joana
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  - Gianluca Mattaroccia @ Joana Alves on Aug 12, 2016 7:36 AM
    Mark Correct
    Correct Answer
    Hi Joana, it depends what type of parameters you will assign to your motor. You will need to define a Torque setting (acceleration and speed) and evaluate the max speed the cart will reach. But to get numbers that have meanings you will need to take into account, friction bearings in your bushings and between ground and wheels.
    
    Of course you can evaluate the stresses importing the reaction forces and bearing loading from Motion to Simulation.
    Make sure you take care of any redundancy in your mates otherwise all you do is worthless.
    Good luck
    Like • Show 1 Like1
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How can I do a motion analysis of a 4wheeled device?

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