基于等价输入干扰估计器的永磁同步电机速度控制

针对永磁同步电机中存在的受参数变化、负载扰动等不确定干扰的影响,提出了一种基于等价输入干扰估计器的永磁同步电机的构造与设计方法.利用组合状态观测器和低通滤波器,将真实的不确定干扰等效为系统的输入扰动,在此结构下控制器与估计器的设计满足分离原理.同时给出了系统线性二次型最优控制器的设计方法,以补偿等效的输入扰动对系统性能的影响.仿真结果表明设计的等价输入干扰估计器能有效地估计干扰,提高永磁同步电机的性能.

Speed control of PMSM based on equivalent input disturbance estimator

The structure and design of permanent magnet synchronous motor based on equivalent input disturbance estimator is presented to suppress the influence from parameter variation and load disturbance.The estimator combines state observer with low-pass filter to make the real unknown disturbance equivalent to the input disturbance of the plant.The controller and estimator satisfy the separation principle by using the estimator presented.Moreover,the design of linear quadratic regulator(LQR) controller is given to compensate the impact of equivalent input disturbance.The simulation results of a permanent magnet synchronous motor(PMSM) system with equivalent input disturbance estimator demonstrate that the estimate of unknown disturbance is valid and the performance of PMSM is also improved.