摘要
针对永磁同步电机基于指数趋近律滑模控制方法系统抖振大,控制器设计过程中参数整定复杂的问题,提出一种基于双曲正切趋近律的滑模控制方法。在原有指数趋近律基础上引入双曲正切函数,不仅保留了指数项趋近速度快的优点,还使系统抖振得到抑制,使控制器设计过程中参数整定得到简化。利用双曲正切趋近律设计了永磁同步电机的滑模控制器,并用李雅普诺夫函数证明了其稳定性。应用Matlab软件搭建了仿真模型并与传统指数趋近律控制方法进行比较,仿真结果表明该控制器与传统指数趋近律控制器相比超调更小,稳定性更高。
A sliding mode control method based on hyperbolic tangent approach law is proposed to solve the problem of large chattering vibration and complicated parameter setting in the controller design of permanent magnet synchronous motor on the basis of exponential approach law. The hyperbolic tangent function is introduced based on index reaching law, which not only preserves the advantages of the exponential approach speed, but also suppresses the system buffeting and simplifies the parameter setting in the controller design process. In this study, the sliding mode controller of permanent magnet synchronous motor was designed by using the improved approach law and its stability was demonstrated by Lyapunov function. The simulation model was built by Matlab and the comparison between traditional exponential approach law control method and the improved approach law was given. The simulation results show that the controller has smaller overshoot and higher stability than the traditional exponential approach law controller.
引文
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