Torsional Vibration Suppression Control for Inverter-Driven Multi-Rotating Mass System Using Non-Ideal Generalized Integrator

There exists multiple resonance modes for inverter-driven multi-rotating mass system. Torsional vibration for the first-mode with the highest amplitude and lowest frequency shall be properly damped. However, conventional active damping methods such as shaft torque derivative feedback using a differentiator for suppressing the first-mode oscillation might cause other resonance modes to become unstable. In this article, the mechanism of why conventional methods may lead to an unstable system is unveiled. A shaft torque derivative feedback control using a nonideal generalized integratoris proposed with detailed design guidelines provided to suppress system first mode oscillation while not affecting the stability of other resonance modes. Parameter sensitivity analysis is performed to demonstrate the robustness of the proposed controller. Finally, simulation and hardware-in-loop experimental tests are done to verify the findings.