弹道学报2012，Vol.24Issue(1)：1-6,6.
具有非线性扰动运动特性的高超声速飞行器动态特性分析方法
A Method of Dynamic Analysis on Hypersonic Vehicle With Nonlinear Disturbance Motion Characteristic
摘要
Abstract
The conventional liberalization modeling approach based on small disturbance can cause an inaccurate model of perturbation motion in high dynamic environment due to the premise of a small perturbation and ignoring the higher-order terms of deviation parameters.Aiming at this problem,a nonlinear perturbation motion modeling method with the second-order terms of parameter error was presented.Based on the model,the ordinary differential equation theory was applied to give a method for dynamic analysis on hypersonic flight vehicle with nonlinear disturbance motion characteristic.The feasibility of the method was respectively verified at the cruise feature point with little change in parameters and the transition point jointing climbing segment and cruise segment with some major changes in parameters.Simulation results show that the stability based on the linear perturbation motion model is consistent with that based on the nonlinear one when there is small perturbation,and the stability is essentially different when large perturbation motion occurs.The non-linear effects existing in models must be considered to analyze the dynamic characteristics of vehicles in high dynamic flight environment.关键词
高超声速飞行器/非线性扰动/动态特性/常微分方程Key words
hypersonic vehicle/nonlinear perturbation/dynamic characteristic/ordinary differential equation分类
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方群,王乐,孙冲..具有非线性扰动运动特性的高超声速飞行器动态特性分析方法[J].弹道学报,2012,24(1):1-6,6.基金项目
国家自然科学基金项目 （）
