How can I apply the same force on multiple objects in Simscape Mulitbody?

Question

Leon Rinke 2021-3-11

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https://ww2.mathworks.cn/matlabcentral/answers/769817-how-can-i-apply-the-same-force-on-multiple-objects-in-simscape-mulitbody

回答： J Chen 2021-4-4

Hi,

I am trying to apply a force that has been calculated by a simulink model to multiple bodies of my Simscape model.

Imagine a chain of thin identical plates. I want to apply a force acting on each plate in the centre of mass (CoM). When I connect the CoM frame of each plate to my force source I get an error message saying this:

I don't know how to solve this. Any help would be much appreciated.

Thanks in advance.

Leon

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Answer 1

J Chen 2021-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/769817-how-can-i-apply-the-same-force-on-multiple-objects-in-simscape-mulitbody#answer_666747

The problem is not with the force block. The problem is caused by incorrect configuration of the components, i.e., the components are connected in such a way that the whole structure is rigid. Most likely errors are in the orientations of the Revolute Joints, which is only free to rotate in its z-axis.