How to measure the acceleration of sun gear in planetary gear system?
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I built the planetary gear train model using the official Simulink multibody document and the motor model as the power input. I want to measure the acceleration of the sun gear. I used the transform sensor module to measure the acceleration. The f end of the sensor is connected to the f end of the sun gear and the B end of the sensor is connected to the world, but the obtained data can not be FFT, I can't see any frequency characteristics of gear meshing in the spectrum. How can I measure the acceleration of the sun gear and how can I change the model diagram?
Is my measurement wrong? I hope you can help me,thank you very much
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Steve Miller
2021-11-26
Hi there - the constraints that define how the gears move with respect to each other are ideal. The effect of the teeth engaging and disengaging is not captured in this model. The Gear Constraint only defines the kinematics. You can see that the signal you are monitoring has a value of less than 3e-14.
If you want to model the effects of gear teeth meshing, you will need to model the contacts of the individual teeth. You can add this effect using Simscape mechanical elements.
--Steve
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