控制系统中的轴扭振会引起系统控制量的振荡,加大机械传动装置磨损,甚至会导致传动轴断裂。在工业应用中,多采用陷波滤波器抑制轴扭振,而陷波频率的选取通常未考虑控制系统延迟因素。基于电机角速度增量、轴转矩增量和电机电磁转矩增量的相位图,分析了控制系统延迟对轴扭振频率的影响。仿真结果对分析结论给予了验证。

The shaft torsional vibration of control system would cause the oscillation of system control quantity, which would increase mechanical transmission gear wears, and even led to the shaft fracture. The shaft torsional vibration could usually be suppressed by using notch filter on industrial application, but the selection of notch frequency was not considering the factor of control system delay. The influence of control system delay on shaft torsional vibration was analyzed by using the phase diagram of angular velocity increment, shaft torque increment and motor torque increment. Simulation results validated the analytical conclusions.

TM 301.2