基于改进QFT方法的直升机飞行控制与仿真

Helicopter Flight Control and Simulation Based on Improved QFT Method

针对直升机飞行包线上由对象数学模型的大范围变化带来的系统不确定问题,采用一种改进的定量反馈理论(QFT)方法进行直升机飞行控制器设计。首先利用H∞回路成形方法实现系统不同控制通道的解耦,将多输入多输出问题转化为单输入单输出问题,然后针对每个单输入单输出系统采用QFT方法进行控制器设计,从而简化QFT的设计过程提高控制效果。将该方法应用于UH-60A直升机的飞行控制,设计了该型直升机在五种飞行状态下的全包线飞行控制器。仿真结果表明:所采用方法具有良好的控制效果,验证了该方法的有效性。

The problem of system uncertainty in Helicopter flight bag online which brought by a widely variety in mathematical model have been investigated by using an improved quantitative feedback theory （QFT） method to design helicopter flight controller. Firstly, we used the H w loop shaping methods to achieve the different control channel of decoupling, the multi-input multi-output problem can be changed into a single-input single-output problem. Secondly, by using the QFT approach, each single-input single-output system controller is designed to simplify the design process of QFT and improve the control effect. Finally, the method is applied in UH -60A helicopter flight control, full envelope flight controllers of the helicopter flying in the five states were also designed. Simulation results show that the method has good control effect and validity.