鲁棒PDF控制策略在永磁同步电机系统中的设计及仿真

Design and Performance Simulation of PMSM Control System Based on Robust PDF Algorithm

摘要:

对电机控制系统的经典反馈设计方案是建立在简化的受控对象模型基础之上,而实际模型参数的变化会引起控制系统性能的改变；文章针对实际应用的永磁同步电机,为了保证电机控制系统的强鲁棒性,通过对其系统灵敏度的理论推导,给出了一种新的控制器参数设计方法；该设计方法以系统灵敏度为评价指标来度量系统的鲁棒性,结合应用于二阶控制对象的伪微分反馈控制器结构,来削弱控制对象参数值的改变对控制系统性能的影响；并建立了精确的永磁同步电机仿真模型,将该方法应用于其速度控制；仿真结果表明在该控制方案下,在永磁同步电机的转动惯量和定子电阻值变化时具有较小超调量变化(小于4%)的响应特性；同时与普通PID控制对比分析,验证了用该方案设计的PMSM调速系统具有较高的抗参数变化的鲁棒性。

Abstract:

Since the classical feedback design scheme of electrical motor control system is established on simplified system model, the varied parameter of the model would bring the change of performance of the whole system. This title proposed a new design method of controller parameters for the practical application of PMSM (permanent magnet synchronous motor, PMSM) to ensure the strong robustness of the control system based on theoretical derivation of system sensitivity. The new method took system sensitivity which measures the robustness of system as evaluation index, and combined PDF controller structure applied to second ordered control object to weaken the effect of the performance of the control system brought by varied parameter values of model. Established accurate simulation system model as an application case of speed control of this method, Simulation verify the minor changes in maximum overshoot of the observer(less than 4 percent) when rotary inertia and stator resistance varies under the this control scheme, and validate the ability of anti-parametric variation and high robustness characteristics of PMSM speed control system with the method proposed by comparative analysis with the conventional PID control.