基于NESO的直线电动机推力波动补偿策略

Force Ripple Suppression in Linear Motor Based on NESO

摘要: 为了抑制推力波动等扰动对直线电动机运行平稳性的影响,提出了一种基于非线性扩张状态观测器(nonlinear extended state observer,简称NESO)的推力波动抑制策略.电机在运行的过程中,NESO能对包括推力波动在内的各种扰动进行实时观测,并通过前馈方式对其进行补偿.当电机运行速度为0.1 m/s时,进行推力波动辨识补偿后稳态时速度波动范围从6.75%下降到1.23%.实验结果表明,该方法有效地减小了推力波动的影响,提高了稳态时速度响应的平稳性.

Abstract: In order to suppress the inherit force ripple of Permanent Magnet Linear Synchronous Motors to get a smooth velocity response,a compensation method based on NESO is proposed.The disturbances including force ripple are online observed by the NESO and compensated by a feed forward component.At the reference velocity of 0.1 m/s,the fluctuation range decreases from 6.75% to 1.23%.Both simulation and experimental results showed that the influence of the force ripple is effectively reduced,and thus resulted in a smoother velocity response.