航天器跳跃式返回的再入动力学特性仿真

Simulation of Reentry Dynamic Properties of Skip Return Spacecraft

深空高速再入返回是航天返回技术面临的新问题。研究采用跳跃式返回方式解决高速再入产生的高过载、高热流峰值问题。建立了完整的航天器再入大气层飞行动力学模型;依据航天器跳跃式返回飞行剖面和返回飞行的运动特性,将再入大气过程划分为初始再入段、初次再入下降段、初次再入上升段、大气层外飞行段和二次再入段,详细研究了各飞行段航天器的动力学特性,简要分析了各阶段的制导任务。通过分析仿真结果,初步摸清了航天器深空飞行跳跃式再入动力学特性。

Deep space return at with high speed is a new topic of spacecraft returning technology. Skip return is introduced to solve the high overload and heat flow summit problem caused by high reentry velocity in this article. A complete flight dynamic model for the atmosphere reentry process is built~ based on the characteristics of the skip return flight and profile, the reentry process is divided into five phases, the first reentry, the first reentry descending phase, the first reentry ascending phase, the flight outside the atmosphere phase and the second reentry phase. After detailed investigations on all these phases, the guidance properties are analyzed briefly. Based on simulation results, the dynamic property of skip reentry from deep space is preliminarily obtained.