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

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英文篇名：Analysis of Impact on Aircraft-Pilot System’ Stability Based on the Nonlinear Characteristics of Aircraft System 作者：李蓝天 英文作者：LI Lantian;The 610 Research Institution of Chinese Aeronautical Establishment; 关键词：非线性 ; 飞行品质 ; 飞机系统 ; Simulink仿真 ; 描述函数法 英文关键词：nonlinear;;flight quality;;aircraft system;;Simulink;;simulation;;describing function method 中文刊名：FJSJ 英文刊名：Aircraft Design 机构：中国航空研究院610所; 出版日期：2019-04-15 出版单位：飞机设计 年：2019 期：v.39;No.190 语种：中文; 页：FJSJ201902005 页数：5 CN：02 ISSN：21-1339/V 分类号：22-25+38

摘要

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。
        How to improving the stability of aircraft-pilot closed loop system is essential to improve the flight quality and ensure the safety of aircraft,which is the most important issue in the aircraft design process.In this paper,on the cruise process of a certain fighter,Simulink and Describing function method is taken as a tool to model the aircraft pilot system and analyze the effects of the three different nonlinear links and their parameters on the stability of aircraft-pilot closed loop system. According to the conclusion, in the process of aircraft designing, the clearance characteristics should be avoided as far as possible,but the saturation characteristics and dead-zone characteristics can be properly introduced, which is helpful to improve the stability of aircraft pilot system'stability.The results of this paper have important reference value for improving the stability of aircraft-pilot closed loop system.

引文

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