Measuring SimScape friction torque
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What would be the best way to measure friction torque generated by the rotational friction block shown in the image of a simple rotational system in the image? The system has a constant input connected to an ideal torque source and an idealised rotational motion sensor as the output.
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Juan Sagarduy
2021-3-16
1 个投票
Hi Vivek I think that a torque sensor between the inertia and the friction element would work great. Br Juan
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Hi Juan I have attached a snapshot of the connection:
The parameters are set as follows:
The output looks like this:
It appears that the friction torque starts from -468.66Nm without displaying the characteristic starting curve.
- What could be the issue here?
On the other hand, if the Rotiational Simscape Interface block is used, the friction torque reads -156.2Nm (constant value, ratio:-0.33).
- Why could this be different? (If this is an acceptable solution)
Thanks in advance for your help!
Juan Sagarduy
2021-3-18
Hi Vivek,
This is the way to capture the friction torque. The sensor has to be in series (not parallel) with the friction element. The results show the expected behaviour.
Br Juan
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