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在永磁同步电动机控制系统中,用分数阶PI~λ取代整数阶PI速度控制器具有更好的动、静态性能,但在工程应用中,分数阶积分也会引起饱和非线性现象.为解决此问题,本文在分数阶PI~λ基础上提出了变结构A-W PI~λ算法以提高速度控制性能.A-W PI~λ算法根据控制器是否进入饱和而对积分状态进行控制,并采用粒子群智能算法实现控制器的各项参数整定.仿真实验表明:分数阶PI~λ比整数阶PI更容易进入饱和并能提前退出,而A-W PI~λ能迅速退出饱和区,A-W PI~λ速度控制器改进了系统的跟随性、抗负载扰动和鲁棒性能,提高了永磁同步电动机调速系统的速度控制性能.
In the PMSM control system, the fractional order PI ~ λ is used to replace the integer-order PI velocity controller for better dynamic and static performance, but in engineering applications, the fractional-order integral also causes the saturation nonlinearity. In this paper, a variable structure AW PI ~ λ algorithm is proposed based on the fractional order PI ~ λ to improve the speed control performance. The AW PI ~ λ algorithm controls the integral state according to whether the controller is saturated or not, The simulation results show that the fractional order PI ~ λ is easier to enter saturation than the integer order PI and can exit earlier, while AW PI ~ λ can exit the saturation region quickly. The AW PI ~ λ velocity controller Improve the followability of the system, anti-load disturbance and robust performance, and improve the speed control performance of the PM synchronous motor speed control system.