电力传动中的扭振及振动抑制

发布时间：2018-01-01 07:19

本文关键词：电力传动中的扭振及振动抑制　出处：《上海大学学报(自然科学版)》2017年02期 　论文类型：期刊论文

【摘要】：传动系统中的机械扭振会引起控制系统控制的振荡,从而加大机械传动装置的磨损,成为制约机械动态性能提高的主要原因.通过并联谐振电路理论分析机械扭振发生的机理和扭振时的能量传递过程,利用品质因数评估扭振的危害程度,定量计算引发扭振的谐波转矩含量.指出在大惯量负载时,扭振危害程度更大,较小的转矩谐波即可激发几十倍的扭矩.最后,引入扭矩反馈抑制扭振,给出了扭矩观测器的有限带宽设计方法,指出基于扭矩观测器的反馈控制能增大谐振频率,并对关键的系统参数进行了敏感性分析.分析和仿真结果表明,该方法可以很好地抑制谐振.
[Abstract]:The mechanical torsional vibration in the transmission system will cause the oscillation of the control system, thus increasing the wear of the mechanical transmission device. The mechanism of mechanical torsional vibration and the process of energy transfer during torsional vibration are analyzed by parallel resonant circuit theory, and the damage degree of torsional vibration is evaluated by quality factor. The harmonic torque content caused by torsional vibration is calculated quantitatively. It is pointed out that the degree of torsional vibration is more serious when the load of large inertia is large, and several ten times of torque can be excited by smaller torque harmonics. Finally, torque feedback is introduced to suppress torsional vibration. The finite bandwidth design method of torque observer is presented. It is pointed out that feedback control based on torque observer can increase the resonant frequency, and the sensitivity of key system parameters is analyzed. The results of analysis and simulation show that the feedback control can increase the resonant frequency. This method can suppress the resonance well.
【作者单位】：上海大学机电工程与自动化学院;
【分类号】：TM921
【正文快照】： 高性能的伺服系统已广泛应用于运动控制中,如医疗影像设备、机器人、精密机床等.一般情况下伺服驱动系统中常使用传动轴、变速器、联轴器等传动部件连接电机和负载,而实际上传动部件具有一定的弹性,并非理想刚体.当伺服系统带宽覆盖执行机构固有机械谐振频率(自然科学版)第23

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