先进战斗机纵向飞行特性与放宽静稳定度研究  

Study on Longitudinal Flight Characteristics and Relaxed Static Stability of Advanced Fighter

作　　者：皇甫乃章 杨蓓[1] 但之华 孙鹏辉 HUANGFU Naizhang;YANG Bei;DAN Zhihua;SUN Penghui(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China;No.1 Department,Shanghai Aerospace System Engineering Institute,Shanghai 201109,China;School of Energy and Power Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]南昌航空大学飞行器工程学院,南昌330063 [2]上海宇航系统工程研究所一室,上海201109 [3]北京航空航天大学能源与动力工程学院,北京100191

出　　处：《航空工程进展》2021年第6期50-61,共12页Advances in Aeronautical Science and Engineering

基　　金：国家自然科学基金(51766011)。

摘　　要：放宽静稳定度在先进战斗机设计领域已获得广泛应用,与其相关的主动控制技术仍有进一步研究的价值,需要对放宽静稳定度对飞机纵向飞行性能的影响进行更全面的分析。以重心后移作为放宽静稳定度的方式,分析放宽静稳定度与某型战斗机俯仰力矩系数的关系,构建战斗机非线性模型并进行开环特性分析,在此基础上,分析放宽静稳定度对飞机运行平衡点的影响机理,对战斗机非线性模型进行线性化,并分析放宽静稳定度对飞机纵向线性模型阶跃响应特性和长短周期模态特性的影响。结果表明:放宽静稳定度可增大战斗机的俯仰力矩系数,提高飞机性能,但可能会使飞机本体模态特性变差,需要在设计控制率时予以考虑。Due to the wide application of relaxed static stability in the field of advanced fighter design and the value of further research on the related active control technology,it is necessary to conduct a more comprehensive analy⁃sis on the influence of relaxed static stability on the longitudinal flight performance of aircraft.In this paper,the cen⁃ter of gravity is taken backward as the way to relax the static stability,the relationship between the relaxed static stability and the pitching moment coefficient of a certain fighter jet is analyzed to build the nonlinear model of fighter jets and analyze the open-loop characteristics.On this basis,the influence mechanism of the relaxed static stability on the operational equilibrium of the aircraft is analyzed to linearize the nonlinear model of the fighter aircraft,and the influence of the relaxed static stability on the step response characteristics and the long and short period modal characteristics of the longitudinal linear model of the aircraft is analyzed.The simulation results show that the re⁃laxed static stability can increase the pitching moment coefficient and improve the aircraft performance,but it may cause the modal characteristics of the aircraft body to deteriorate,which needs to be considered in the design of con⁃trol rate.

关 键 词：放宽静稳定度 非线性数学模型 飞行特性 先进战斗机 

分 类 号：V271.41[航空宇航科学与技术—飞行器设计] V212.121