滑翔飞行器再入段弹道特性分析

为解决滑翔飞行器再入段受力复杂、非线性约束条件多、弹道设计难度大的问题，对平衡滑翔条件下的弹道解析关系进行分析。根据平衡滑翔的概念，通过简化的动力学微分方程，对滑翔飞行器再入段弹道影响因素进行分析，联合大气指数模型，推导出平衡滑翔条件下的弹道初始参数与速度、射程以及高度的解析关系，并进行仿真验证。仿真结果表明：更高的滑翔初速和最优的平衡滑翔初始入射角可以增加滑翔距离，不同高度再入时对射程影响不大。

Analysis of Trajectory for Glide Reentry Vehicle

In order to solve the problems of complex forces, many nonlinear constraints and difficulties in trajectorydesign for glide reentry vehicle, the analytical solutions of trajectory are analyzed on equilibrium glide conditions. Basedon the concept of equilibrium glide, the influence factors of reentry trajectory of glide vehicle are analyzed by simplifieddynamics differential equations. Combined with atmospheric exponential model, the analytic relationship between initialtrajectory parameters and velocity, range and altitude under the equilibrium glide conditions is deduced and verified bysimulation. The simulation results show that the range of the glide can be increased by higher initial gliding speed andoptimal initial incident angle of equilibrium glide, and the impact of reentry at different altitudes is not significant.