Can Simscape Multibody calculate the natural frequencies of the Stewart Platform?

Hi there, as the title says, I want to know if Simscape Multibody can calculate the natural frequencies of the Stewart Platform? In this platform, the six intermediate links are flexible, and the base and the end effector are rigid.

Many Thanks!

[Yifeng Tang]

Simscape Multibody supports flexible body modeling of several types of geometries. See "Reduced Order Flexible Solid", "General Flexible Plate", and "Beam Elements" category on this page: https://www.mathworks.com/help/sm/bodies.html. If the intermediate links can be approximated with any of the beam elements, or if you have the stiffness matrix and the mass matrix of those links, you can model them as flexible bodies.

I'm not aware of a direct way to calculate the natural frequency, but I think you can do some frequency response test using the multibody model and extract that information from the response.

[Tony Cheng]

Hi Yifeng, thx very much for your response! I will try to build a model in the environment and check it nf can be calculated.

[Yifeng Tang]

And here is an example model of a Stewart Platform, if you are not using it already: https://www.mathworks.com/help/sm/ug/stewart-platform.html

You may try replacing some links with flexible bodies and see if it works.