一种基于MIMO系统动态渐近解耦的阵风减缓方法

提出了一种M IMO系统的动态渐近解耦方法。该方法基于输出反馈、部分状态反馈以及极点配置技术,通过调整控制器参数,将闭环系统的零、极点配置在期望位置上,使闭环传递函数的主对角元素占优,同时将非主对角线元素的动态增益调至最小,从而实现了M IMO系统的动态渐近解耦控制。用该方法对某主动控制飞机的垂直平移模态(直接力控制)进行了解耦设计,并将其应用于飞机的阵风减缓。用该方法设计的垂直平移模态与未采用主动控制技术的飞机进行仿真对比,其抗风性能提高了36%。

An Improved Gust Alleviation Method

Having failed to find any detailed technical information concerning gust alleviation of active-control large transport aircraft,Chinese engineers have to research and develop such information ourselves.In a book~([1]) coauthored by the first author,such information,as available in China before 1999 and known to the first author,was included.Since 1999 we have made further improvements;we now present the improved version of such information.Our method is a dynamic asymptotic decoupling method for MIMO(multi-input multi-output) system.This method is based on output feedback,partial state feedbacks and pole assignment technology.In the full paper,we explain our method in detail;here we give only a briefing.By adjusting the controller parameters,the zeros and poles of the closed loop system are assigned to suitable positions;principal diagonal elements of the closed loop transfer function are purposefully made dominant in order to minimize the dynamic gain of the non-principal diagonal elements.So the dynamic asymptotic decoupling control for the MIMO system is accomplished.As a numerical example,we used our method to design the vertical transition mode(direct lift control) of a certain active-control aircraft for gust alleviation.Simulation results show preliminarily that,as compared with normal design,the vertical transition mode designed by our method improves the gust alleviation capability by 36%.Application of our method to gust alleviation of real aircraft remains to be done.