基于飞机系统的典型非线性特性对人机系统稳定性影响研究

如何改善飞机的飞行品质,提高飞行稳定性,是飞机设计最核心的问题之一,研究飞机系统的非线性因素和稳定性问题,对于提高飞行稳定性意义重大。文中通过利用Simulink方法和描述函数法对人机系统进行建模仿真和分析,结果表明,在飞机系统中,伴随着饱和、死区、间隙3种非线性特性的引入,飞机操纵系统会发生相位延迟、精度减小、稳态误差增大,等而引起飞行品质陡降。根据文中研究结论,在飞机设计过程中,应该尽量避免间隙特性的出现,但可以适当引入饱和特性和死区特性,这在一定程度上有助于人机系统稳定性的提高。

Analysis of Impact on Aircraft-Pilot System''Stability Based on theNonlinear Characteristics of Aireraft System

How to improving the stability of aircraft-pilot closed loop system is essential to improvethe flight quality and ensure the safety of aircraft, which is the most important issue in the aireralt de.sign process. In this paper,on the cruise prcess of a certain fighter, Simulink and Describing func.tion method is taken as a tool to model the aircraft pilot system and analyze the effects of the threedifferent nonlinear links and their parameters on the stability of aircraft-pilot closed loop system. Ac-cording to the conclusion, in the process of aircraft designing, the clearance characteristies should beavoided as far as possible , but the saturation characteristics and dead-zone characteristics can be prop.erly introduced, which is helpful to improve the stability of aircralt pilot system'' stability. The resultsof this paper have important reference value for improving the stability of aircraft-pilot closed loops system.