操纵品质的鲁棒飞控系统设计

DESIGN OF FLIGHT CONTROL SYSTEMS WITH ROBUSTNESS PROPERTY OF HANDLING QUALITY

利用对误差函数加权的最优控制,提出了具有固定增益的鲁棒飞行控制系统的设计方法。用该方法设计的控制系统不仅具有稳定的鲁棒性,而且具有操纵品质的鲁棒性。本文研究了该鲁棒飞行控制系统在全飞行包线内的稳定性,还对某歼击机设计了鲁棒飞行控制系统。设计和仿真表明了该方法的简便性和有效性。

It this paper the optimal quadratic regulator design method is used to design the flight control systems with the robustness properties of stability and handling quality. The weighting matrix Q is successively modified to assign the close loop system poles in a desirable region at different flight conditions resulting in a simultaneously stable flight control system under different flight conditions. Then a weighting error function which is the difference between the states of a nominal system and the systems corresponding to different flight conditions is used to minimize the difference between the performances of the nominal system and the systems of various flight conditions.Such a designed flight control system has the robustness properties of stability and handling quality. The stability in whole flight envelope is proved. An example of a fighter control system is illustrated and it shows the simplicity and efficiency of the design procedure.