一种基于H∞与PID混合控制的速度控制器设计

The Design of Speed Controller Hybrid Control with H∞ and PID

以PID为核心的速度控制系统易受到参数摄动以及外部扰动的影响,鲁棒性较差。针对这点不足,以某型飞机的数学模型为基础,提出了基于H∞与PID混合控制的速度控制器设计方法,以鲁棒控制姿态,实现内回路的设计,以PID控制速度,实现外回路的设计。在参数摄动情况下,将混合控制器与单纯PID控制器的控制效果进行对比评估,仿真结果表明所设计控制器性能满足要求,且比单纯的PID控制器具有更好的鲁棒性。

The speed control system based on PID control is influenced easily by parameter perturbation and external disturbance, so its robustness is poor. Based on the mathematical model of a certain aircraft, the speed controller is designed employing hybrid control with robust H∞ and PID, including the inner loop in which robust H∞ control is used to stabilize the attitude angle, and PID control law in the outer loop can guarantee the steady speed. Under the circumstances of parameter perturbation, the control effect between hybrid controller and traditional PID controller is evaluated, and the result of the simulation indicates that the hybrid controller can meet performance requirements, and it has stronger resisting parameter perturbation than traditional PID controller.