基于直接反馈线性化的永磁同步电动机速度跟踪控制

Speed Tracking Control of PMSM Based on Direct Feedback Linearization

永磁同步电动机是一个复杂耦合的非线性系统。本文应用直接反馈线性化理论,通过对输出变量进行李微分,得到所需的坐标变换和非线性系统状态反馈,实现了永磁同步电机系统的输入输出线性化,同时也实现了系统的解耦。仿真结果表明:它与传统的PID 控制相比,有很好的速度跟踪性能,验证了系统设计的可行性和有效性。

Permanent magnet synchronous motor（PMSM） is a nonlinear system with significant coupling. This paper applies the direct feedback linearization （DFL） theory, the appropriate coordinate transformation and nonlinear state feedback are obtained through Lie derivative to the output variable, with which the PMSM system input-output is linearized. Furthermore, which realizes the completely dynamic decoupling. The simulation results show that the method proposed in this paper has better speed tracking performances comparison with normal PID control, and proves the validity and feasibility of designed system.