Ideal Rotational Motion Sensor (Simscape) Shows incorrect Motor Speed readings

Dear Matlab Community,

as shown in the attached screenshot,

the readings of motor speed and the real speed is different.

deg, deg/s are chosen for the ideal rotational motion sensor and PS-Simulink Converter

unit of Speed here is Hz, and PID Speed setpoint is around 12.5Hz,

so that I expect to see 360° jump in Angular Postion for each 80ms,

but the time period is around 40ms,..

I tried to use derivative block to calculate the angular velocity from d/dt, but the result is even more weird.

Why is that??

Answer 1

[Sabin]

I was not able to reproduce this problem in R2017b and newer releases. It would be helpful to provide a model and MATLAB release used when running into this problem.