总能量控制在RLV自动着陆中的应用

为了解除重复使用运载器(RLV)自动着陆段飞行速度和航迹之间的非线性耦合,设计了基于总能量原理的纵向飞行控制律。该原理的核心思想是通过RLV的阻力板改变阻力来控制总能量,用升降舵调节总能量的分配,通过协调阻力板和升降舵指令,达到合理调节和分配能量的目的,确保控制系统具有良好的非线性解耦控制能力和较强的鲁棒性。仿真结果表明,基于总能量的飞行控制系统,实现了RLV自动着陆段高度和速度的解耦控制,满足不确定条件下RLV自动着陆的要求。

Integration of automatic landing for RLV with total energy control system

In order to relieve the non-linear coupling between flight speed and flight path on automatic landing segment of the RLV,the total energy principle based flight control law is designed.Its core idea is to control the total energy with the speed brake of RLV,adjust the distribution of total energy with the elevator and coordinate the elevator and the speed brake command so as to properly adjust and distribute the energy and make sure that the control system has good non-linear decoupling capability and strong robustness.The simulation results indicate that the total energy based flight control system realizes the decoupling of altitude and speed on RLV automatic landing segment and meets the requirements for RLV automatic landing at uncertain condition.