As can be seen from the Bode plot, the system has linearized to zero such that the torque
has no effect on the angle or angular velocity. You can explore why this is the case using
the Linearization Advisor.
Linearize Model with Advisor Enabled
To relinearize the model and generate an advisor, select Linearization Advisor, and click
Bode Plot 1.
4 Troubleshooting Linearization Results