论文部分内容阅读
研究了在共面圆轨道ＨＥＯ－ＬＥＯ变轨过程中，气动辅助轨道转移飞行器（ＡＯＴＶ）大气内飞行的闭环导引律的设计问题。应用Ｌｙａｐｕｎｏｖ方法设计最优闭环导引律，并导出了控制变量的解析形式。在仿真算例中，首先采用ＵＳ６２标准大气密度模型进行控制器的设计和仿真，然后以此控制器分别控制ＡＯＴＶ在三种不同的大气密度中飞行。仿真结果表明，ＡＯＴＶ进入三种“未知的”大气密度模型中，不迫可以完成变轨任务，还可以极大地节省燃料。所设计的导引律能补偿大气密度大范围扰动，便于实时应用。
The design of the closed-loop guidance law for the airborne flight of the aerodynamic auxiliary orbit transfer aircraft (AOTV) during the orbital transition of a coplanar orbital orbit is studied. The Lyapunov method is used to design the optimal closed-loop guidance law and the analytical form of control variables is derived. In the simulation example, we first design and simulate the controller by using the US62 standard atmospheric density model, and then use this controller to control the AOTV to fly in three different atmospheric densities respectively. The simulation results show that AOTV enters into three “unknown” atmospheric density models and can not change the orbital task at a very short time. It can also save fuel greatly. The designed guidance law can compensate a wide range of atmospheric density disturbance for real-time application.