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