基于新型趋近率的永磁同步电机滑模速度控制研究

Research on sliding mode speed control of permanent magnet synchronous motor based on new reaching rate

针对传统指数趋近律中存在抖振和抗干扰能力差的问题,提出了一种变参数模糊滑模控制策略。将转速误差引入等速项,设计一个分数多项式,并将模糊控制引入指数项,使用Fal()函数替代sign()函数;在永磁同步电机控制系统中引入降阶负载转矩观测器,将观测值用于控制器。通过Simulink模型搭建和仿真验证,结果表明该设计显著提高了系统的控制性能,并有效削弱了系统的抖振。

Aiming at the problem of chattering and poor anti-interference ability in the traditional exponential reaching law,a variable parameter fuzzy sliding mode control strategy was proposed.In this method,the speed error was introduced into the constant speed term to design a fractional polynomial,and the fuzzy control was introduced into the exponential term,and the Fal() function was used instead of the sign() function.In addition,a reduced-order load torque observer was introduced into the permanent magnet synchronous motor control system,and the observed values were used for the controller.Through Simulink model building and simulation verification,the results showed that the design significantly improved the control performance of the system and effectively weakened the chattering of the system.