输出重定义方法设计垂直/短距起降飞机高度控制器

Altitude controller design for vertical or short takeoff and landing aircraft with output redefinition method

垂直/短距起降飞机是一类典型的非最小相位系统.系统的负调特性使得飞机高度响应比较缓慢,并且会在初始阶段响应为负,从而出现不期望的掉高现象.针对该问题,本文设计了新的最小相位输出预估控制器,通过调节近似输出零点的方法提高系统的动态响应;对于负调部分,采用两步参数整定的方法设计PID控制器,达到抑制负调的作用.最后,对飞机的高度俯仰控制进行了仿真验证,结果表明设计的控制器对飞机高度初始负调具有明显的抑制作用,并且缩短了回复上升所需的时间.

Vertical or short takeoff and landing (V/STOL) aircraft is a typical non-minimum phase system.The undershoot of the system slows down the height response of the aircraft,and the negative initial stage of the response may also result in undesired fall-out.To solve these problems,a new minimum phase output estimation controller is designed in this paper to improve the dynamic response by adjusting the approximate output zeros,and a PID controller using the two-step parameter tuning method is designed to suppressing the negative regulation.The results of altitude pitch control simulation show that the controller designed here has a significant inhibitory effect on the initial negative adjustment of the aircraft altitude,and the rise time of the height recovery is shorter.