基于最优控制的永磁同步电机转速控制

Speed control of permanent magnet synchronous motor based on optimal control

由于永磁同步电机具有非线性和变量之间存在耦合性,为提高永磁同步电机的控制精度与稳定性能,对采用微分几何方法和最优控制器设计问题进行了研究,首先结合永磁同步电机的数学模型对电机转速的理论基础进行了分析,并采用状态反馈精确线性化控制策略,在此基础上,利用二次型性能指标的最优控制器设计方法,求解出系统最优控制率,最后对该方法进行仿真验证,结果表明,该方法可以明显改善系统的动态性能,提高一定的抗干扰能力。

Because of the nonlinearity and coupling existed between the variables, the issues of using differential ge?ometry method and designing optimal controller were researched to improve the control accuracy and stability of per?manent magnet synchronous motor ( PMSM) . The theoretical basis of motor speed was analyzed by combination with the mathematical model of PMSM and the state feedback′s accurate linearization control strategy. On this basis, the optimal controller was designed using the quadratic performance index, so as to solve the optimal control rate of the system. Finally, the above method was verified by simulation. The results show that the dynamic property and anti-interference ability can be improved.