非线性永磁同步电动机约束预测控制  

Constrained MPC for the Nonlinear PMSM Servo System

作　　者：林辉[1] 王永宾[1] 

机构地区：[1]西北工业大学,陕西西安710129

出　　处：《微特电机》2010年第11期43-46,69,共5页Small & Special Electrical Machines

基　　金：航空科学基金(2007ZC53036)

摘　　要：针对永磁同步电动机在伺服系统中的非线性问题和约束控制问题,提出了反馈线性化(FBL)与线性预测控制(LMPC)联合控制策略。利用反馈线性化方法,将原非线性系统模型转换为线性模型;利用LMPC解决约束条件对系统性能的影响。该方法分别解决了直接采用非线性预测控制(NMPC)计算量大并且可能收敛于局部极小点的问题和传统约束控制(抗饱和方法)设计过程复杂、适用范围小的问题。对于该方法中存在的约束条件非线性映射问题,提出一种改进方法。仿真结果表明FBL与LMPC联合控制策略简化了约束控制系统设计,改善了系统静、动态性能,提高了系统实时性和鲁棒性。The combined feedback linearization（FBL） and linear model predictive control（LMPC） scheme was proposed to solve the problems of nonlinear and constrained control with the permanent synchronous motor（PMSM） servo system.The nonlinear model was transformed into the linear one with FBL and the constrained control was solved by LMPC.The control scheme solved the problems that NMPC has substantial computational load and may converge to a local minimum and that the conventional constrained control（anti-windup method） has limitations of complex design process and small range of applications.An improved method was presented in order to satisfy the constranined nonlinear mapping.Simulation results show that the combined FBL and LMPC scheme simplifies the design process,improves the static and dynamic performance and enhances the real-time and robustness of the control system.

关 键 词：永磁同步电动机 滚动时域 反馈线性化 微分几何 非线性映射 

分 类 号：TM341[电气工程—电机]