基于抗干扰和故障诊断的永磁同步电动机反演控制

Backstepping Control of Permanent Magnet Synchronous Motor Based on Anti-disturbance and Fault Diagnosis

针对含有外部干扰和突变故障的永磁同步电动机速度跟踪控制问题,本文提出了一种基于抗干扰和故障诊断的反演复合控制策略。首先,本文不仅考虑了系统的外部扰动,而且考虑了突变故障带来的影响,设计了相应的干扰观测器和故障诊断观测器,并可通过直接求解线性矩阵不等式获得其控制增益。然后,设计基于上述观测器的反演复合控制器用于克服非线性的影响,达到满意的鲁棒性。最后,仿真结果表明,本文提出的复合控制器在有效抑制干扰和诊断故障的同时,具有良好的速度跟踪性能。

For the speed tracking control problem of permanent magnet synchronous motor(PMSM)with external disturbance and sudden fault,a backstepping composite control strategy based on anti-disturbance and fault diagnosis is proposed in this paper.Firstly,not only the external disturbance of the system is considered,but also the impact of sudden fault is considered in this paper,corresponding disturbance observer and fault diagnosis observer are designed,and their control gains can be obtained by directly solving linear matrix inequalities(LMIs).Moreover,on the basis of these,a composite controller is designed to overcome the influence of nonlinear and achieve satisfactory robustness.Finally,simulation results demonstrate that the proposed composite controller can effectively suppress disturbances and diagnose faults,and achieve good speed tracking performance.