- The start of the motion is extremely abrupt, jerking the mass forward with a high acceleration and then slowing down to steady state speed. The crane is then actually slowing the mass down, causing it to swing forward.
- The CG of the block is above the point where it is attached to the rod AND a rotational spring is holding it in it its current position.
Simscape end mass swings in the opposite direction
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Ranjit Roshan
on 27 Feb 2023
Commented: Ranjit Roshan
on 16 Apr 2023
I have a crane model. In this model, when the crane starts compressing, the free mass at the end connected with a revolute joint is supposed to swing backwards, instead it swings in the forward direction. Can someone tell why this is happening?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1308870/image.png)
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Accepted Answer
Steve Miller
on 12 Mar 2023
Without looking at the model directly, it is hard to say for sure.
Some possibilities:
--Steve
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