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针对考虑铁损的电动汽车用异步电动机驱动系统中存在的负载扰动和系统参数不确定问题,采用模糊逻辑系统逼近系统中的非线性项,通过引入命令滤波反步技术克服传统反步法无法避免的“计算爆炸”问题,引入补偿信号消除滤波误差的影响,实现对异步电动机的位置跟踪控制.Matlab仿真结果验证了所提出方法的有效性.
Aiming at the problems of load disturbance and system parameter uncertainty existing in induction motor drive system of electric vehicle considering iron loss, the fuzzy logic system is used to approximate the nonlinear term in the system. The introduction of command filter backstepping technology can not avoid the traditional backstepping method “Computation Explosion ” problem, the compensation signal is introduced to eliminate the influence of the filter error, and the position tracking control of induction motor is realized. The Matlab simulation results verify the effectiveness of the proposed method.