Revolute joint with torque input not moving (no error thrown)

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Carson Lansdowne 2021-7-13

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https://ww2.mathworks.cn/matlabcentral/answers/877973-revolute-joint-with-torque-input-not-moving-no-error-thrown

回答： Steve Miller 2021-9-28

Hello, I am building a simscape model of a 3DOF model, part of which I have pictured below. The mechanism giving me grief is rather simple, it is just a leadscrew mounted to a carriage. The revolute joint, "Revolute4" is giving me a lot of trouble and I believe it might (?) have something to do with my lead screw block, since this block in particular proved difficult to work with..

Essentially, when I move the carriage, via a prismatic articulation signal, the revolute4 joint will output a motion and position signal. However, when I try to drive this with torque input directly to the Revolute4 (and not the prismatic), there is no revolution of the joint. How do I resolve this? Simscape throws no errors and therefore I am more or less at a complete loss on how to troubleshoot this issue. I have attached the image of part of my project, unfortunately I will not be able to include the entire project but I believe this information is enough to begin with.

Thanks!

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Carson Lansdowne 2021-7-14

Yifeng Tang 2021-7-23

Is it possible to reproduce this problem without including your IP content, by removing details not related to the revolute joint movement? It's really difficult to figure out model problem from snapshots.

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