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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。
In order to dispel the nonlinear coupling between flight speed and flight path of RLV automatic landing section, a longitudinal flight control law based on the principle of total energy is designed. The core idea of this principle is to control the total energy by changing the resistance of the resistance plate of the RLV, adjusting the total energy distribution by using the elevator, coordinating the resistance plate and the elevator command to achieve the purpose of adjusting and allocating energy reasonably, and ensuring that the control system has a good non- Linear decoupling control and robustness. The simulation results show that the total energy based flight control system can realize the decoupling control of the height and speed of RLV automatic landing section and meet the requirement of RLV automatic landing under uncertain conditions.