永磁型无轴承电机自适应振动抑制控制

Adaptive vibration-rejection control on permanent-magnet-type bearingless motors

为解决在永磁型无轴承电机转子抑制振动控制时,高频噪声信号降低振动信号频率辨识精度,导致系统不稳定的难题,介绍了一种基于多频率跟踪算法的转子自适应振动抑制控制策略。分析了振动信号频率辨识误差形成机理,推导了自适应多频率跟踪算法,构建了转子振动抑制控制系统,采用李雅普诺夫稳定性理论分析了自适应多频率跟踪算法和基于该算法的振动抑制控制系统稳定性。将其应用到永磁型无轴承电机转子磁场定向控制系统中,进行了仿真和实验研究。研究结果表明,自适应多频率跟踪算法可快速准确辨识振动信号频率,基于该方法的振动抑制控制系统,可有效抑制转子振动,提高转子旋转精度。

This work aims to solve the issues that the high frequency noise signal seriously affects the identificationprecision of vibration frequency and that the vibration-rejection control system is unstable in permanent-magnet-type bearingless motor. A vibration-rejection control method based on adaptive multi-frequency tracking algorithm was presented. The mechanism of vibration frequency identification error was analyzed. The adaptive multi-frequency tracking algorithm was induced and the control system was constructed. Using Lyapunov stability theory, the adaptive multi- frequency tracking algorithm and the control system asymptotically stability were proved. The method was added into the rotor field oriented control system of permanent-magnet-type bearingless motor. Simulation and experiments were conducted. The results show that the adaptive multi-frequency tracking algorithm can identify the vibration frequency quickly and correctly. The vibration-rejection control system can suppress the rotor vibration and the rotational accuracy is improved.