基于线性二次型的永磁同步电机最优滑模控制

永磁同步电机的伺服控制系统是一个典型的非线性、强耦合、多输入多输出的系统,负载扰动和参数摄动都会使系统不稳定。针对这一问题,提出了一种基于线性二次型最优的滑模控制设计方法。将滑模控制与最优控制二者的优点相结合,设计了最优滑模控制律,并分别搭建基于传统滑模控制的永磁同步电机速度控制器和基于线性二次型最优的滑模速度控制器的仿真模型,在相同的条件下进行仿真,观察系统在两种控制器下的抗干扰能力。结果表明,不论系统受到突加负载信号还是突减负载信号的干扰,最优滑模控制器都具有很好的抗干扰能力,有效地增强了系统的鲁棒性。所提出的方法提高了永磁同步电机控制系统的动静态性能,对深入研究永磁同步电机控制系统具有一定的参考价值。

Optimal sliding mode control of PMSM based on linear quadratic form

Permanent magnet synchronous motor (PMSM) servo control system is a typical non-linear, strong coupling, multi-input and multi-output system. Load disturbance and parameter perturbation will make the system unstable. To solve this problem, a sliding mode control design method based on linear quadratic optimization is proposed. This method combines the advantages of both sliding mode control and optimal control to design the optimal sliding mode control law. The simulation model of the PMSM speed controller based on the traditional sliding mode control and the linear quadratic optimal sliding mode speed controller are built separately. Under the same condition of motor performance parameters, the anti-interference ability of the system under the two controllers is observed. The results show that the optimal sliding mode controller has good anti-jamming ability and robustness, regardless of whether the system is disturbed by sudden load signal. The proposed method improves the dynamic and static performance of PMSM control system, and provides some reference value for better research of PMSM control system.