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为了提高永磁同步电机调速系统的控制性能,提出了一种基于非线性干扰观测器的鲁棒滑模速度控制器。首先建立了包含负载扰动的永磁同步电机数学模型,为了减少扰动量的影响,采用非线性干扰观测器进行在线估计,并以此得到的观测值作为前馈量补偿到滑模控制器的输入端。最后与PI控制器进行仿真比较,结果表明,该算法提高了系统的响应速度,减小了稳态误差。
In order to improve the control performance of permanent magnet synchronous motor speed control system, a robust sliding mode speed controller based on nonlinear disturbance observer is proposed. Firstly, a mathematical model of permanent magnet synchronous motor with load disturbance is established. In order to reduce the influence of disturbance, an online disturbance observer is used to estimate the line and the observed value is compensated to the input of the sliding mode controller end. Finally, compared with the PI controller, the simulation results show that this algorithm improves the system response speed and reduces the steady-state error.