How to represent a 6DoF platform using SimMechanics?

Hello!

I would like to know how I could represent a six degrees of freedom platform using SimMechanics. The inputs of this platform will be 3 linear accelerations and 3 angular accelerations.

I have to represent a radar mounted in the platform. The radar has been designed using Solid Works and imported to Simulink using the Solid Works/SimMechanics converter, so my problem is the platform.

I do not really need a complex model. One only Body block with 6 DoF and 6 input accelerations will be fine for me.

Thank you very much!

Answer 1

[Guy Rouleau]

There is a Stewart Platform demo shipped with SimMechanics. The Stewart platform is a 6dof platform, actuated by 6 linear actuator. So it should be realtively easy to adapt to your system.

The demo is introduced online here:

http://www.mathworks.com/products/simmechanics/demos.html?file=/products/demos/shipping/mech/mech_stewart_vis.html

You can find info here:

http://www.mathworks.com/help/toolbox/physmod/mech/vis/f3-16448.html#f3-24130

In MATLAB, look in the list of demos or type

mech_stewart_vis

or

mech_stewart_slider

or

mech_stewart_trajectory

to directly open the models.

[Pablo]

Hello!

First of all, thank you for tour respond!

The platform, that I need, must represent the movement of a plane, therefore I do not think that I can represent a looping or a corkscrew with the Stewart Platform.

I can use the Stewart Platform for easy movements.

Any other ideas?

Again, thank you very much!!!

[Guy Rouleau]

The Stewart platform is an example to get you started and help learning... The system you describe can definitely be implemented in SimMechanics, itjust require a bit a work.

[farzad]

I am having the same problem. I just need to read the joints lengths variation on time inputing a certain displacement ( only along z or x or y axis e.g.)

but it's too complicated to adjust. Also I don't find where I can modify the amplitudes of movements.

[farzad]

Here is my question

https://www.mathworks.com/matlabcentral/answers/433544-how-do-i-save-the-history-of-length-change-of-the-6-joints-in-the-stewart-platform-with-gripper