关键词: 参数敏感性, 扭矩观测器, 谐振频率,  谐振电路, 扭振

Abstract:

Torsional vibration causes oscillation and increases mechanical transmission wear. It is a main constraint in improving dynamic performance of drive systems. A parallel resonant circuit theory is used to analyze the mechanism and energy transfer process during torsional vibration. With a quality factor for assessing the degree of harm, torsional torque caused by torsional vibration harmonic content is quantitatively calculated, showing that a large inertia load leads to a great degree of torsional vibration damage, and even a small harmonic torque can cause torque of several dozens of times as large. Torque feedback is introduced to inhibit torsional vibration, and a design method of torque observer with limited bandwidth is presented. The torque feedback control based on observer can raise the resonant frequency. A sensitivity analysis is done for some critical system parameters. The analysis and simulation studies show that the proposed method can suppress resonance.

Key words: resonant circuit ,  parameter sensitivity,  resonant frequency ,  torque observer , torsional vibration