空天飞行器概念设计再入数学建模研究

Atmospheric Reentry Modeling of Aerospace Vehicle Dynamics for Conceptual Design Studies

研究了空天飞行器(ASV)再入飞行条件下6自由度数学建模问题,所建数学模型包含完整的6自由度动力学方程和运动方程。气动力和力矩系数是迎角、马赫数、高度及控制舵面偏角的函数,反作用控制系统(RCS)推进器属于开关型的,控制量可近似为常值开关型的量。开环特性分析说明整个模型能够体现出ASV复杂的非线性、耦合性以及快时变性等特点,可满足新一代高超声速飞行器轨迹优化、姿态控制等问题的概念设计和仿真研究。

The problems about the modeling of six degrees of freedom of an aerospace vehicle(ASV) under the reentry flight condition are studied.The proposed model includes the whole of kinetic equations and motion equations.Aerodynamic force and moment coefficients are given as functions of angle of attack,Mach number,altitude and control surface deflections.The thrusters of reaction control system(RCS) are of switch type and the control value is approximately switching constant.Open-loop dynamics and stability chara...