扭转减振器频率控制优化及试验研究

Research on self-tuning variable stiffness torsional vibration suppression technology is conducted to address multi-modal torsional vibration in vehicle powertrain systems under wideband excitation. The working principle of the proposed parallel variable stiffness frequency-tuned compound torsional damper is introduced, the dynamic model of the torsional vibration system with the damper is established, the transient changes of the inherent vibration characteristics of the torsional vibration system during frequency tuning is analyzed, the optimal frequency tuning control scheme for the parallel variable stiffness frequency-tuned compound torsional damper absorber block that is suitable for system operating conditions is proposed, a torsional damper frequency tuning validation test bench is constructed, semi-active control experiments on the torsional damper are conducted, and its frequency tracking characteristics with respect to external excitation frequencies are tested. The research results show that the self-tuning variable stiffness absorber block can effectively improve the vibration reduction performance of the torsional vibration system, and the improved frequency tuning scheme can significantly reduce the vibration response of the torsional vibration system. Moreover, the semi-active torsional damper performs significantly better than the passive damper throughout the frequency tuning range, which verified the effectiveness and reliability of the proposed frequency tuning improvement scheme.