基于改进分数阶滑模控制的PMLSM直接推力控制  

PMLSM DIRECT FORCE CONTROL BASED ON IMPROVED FRACTIONAL ORDER SLIDING MODE CONTROL

作　　者：李国洪[1] 钱凌志 Li Guohong;Qian Lingzhi(Tianjin Key Laboratory of Complex System Control Theory and Application,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学天津市复杂系统控制理论及应用重点实验室,天津300384

出　　处：《计算机应用与软件》2024年第3期75-80,共6页Computer Applications and Software

基　　金：国家重点研发计划项目(2017YFB1303304);天津市科委重点研发计划项目(18YFFCTG00040)。

摘　　要：针对分数阶滑模控制在永磁直线同步电机(Permanent Magnet Linear Synchronous Motor, PMLSM)直接推力控制下转速环精度不高、磁链和推力波动大等问题,提出一种改进的分数阶滑模控制算法,即分数阶双幂次指数趋近律、分数阶变速趋近律相结合的组合趋近律,能有效减弱滑模控制引起的系统振荡,加快趋近速率。仿真结果表明:与分数阶滑模控制相比,在PMLSM直接推力控制系统中采取改进分数阶滑模控制,磁链和推力波动明显减弱,系统响应速度加快,提高了PMLSM推力响应的抗干扰能力。Aimed at the problems of the integer-order sliding mode control under the direct force control of the permanent magnet linear synchronous motor(PMLSM)that the accuracy of the speed loop is not high and the flux linkage and the thrust fluctuation are large,an improved fractional-order sliding mode control algorithm is proposed.The combination of the double-power exponential reaching law and the fractional variable speed reaching law could effectively reduce the system oscillation caused by sliding mode control and accelerate the approach rate.The simulation results show that compared with integer-order sliding mode control,when the improved fractional-order sliding mode control is adopted in the PMLSM direct force control system,the flux linkage and thrust fluctuations are significantly reduced,the system response speed is accelerated,and the anti-interference ability of the PMLSM thrust response is improved.

关 键 词：永磁直线同步电机 分数阶滑模控制 组合趋近律 直接推力控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]