【摘要】 研究在异面圆轨道ＬＥＯ－ＬＥＯ变轨过程中，气动辅助轨道转移飞行器（ＡＯＴＶ）大气内飞行的闭环最优导引律的设计问题。首先使用Ｌｏｈ常数项以及一些假设条件对ＡＯＴＶ的动力学模型变换、简化，然后以大气出口处速度取极大值作为最优条件，应用最优控制理论得到控制方程的解析形式。在仿真算例中，首先采用大气密度的指数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在四种不同的大气密度中飞行。这四种大气密度取自Ｇｒｏｖｅｓ模型的四组不同纬度数据，其与标准大气密度指数模型的偏差范围为±６７％。仿真结果表明：ＡＯＴＶ进入到“未知”的四种不同的大气密度中，不但可以完成变轨任务，还可以极大地节省燃料。仿真结果证明所设计的闭环导引律正确、可行，而且能够补偿大气密度大范围的扰动。更多还原

【Abstract】 This paper considers the design of optimal closed loop guidance law for aeroassisted orbital transfer vehicle(AOTV) which arises in the study of noncoplanar LEO LEO orbital transfer. At first, the dynamic model of AOTV is simplified by means of Loh term assumption and other assumptions, then analytical results of control formulation are derived by using optimal control theory with the maximum velocity of AOTV exiting from the atmosphere as the optimal performance index. The controller is designed and simulated in which atmospheredensity is based on exponential model, then AOTV is controlled to fly into four different atmosphere densities with the designed controller. The four atmosphere density models are gotten from the four groups of different altitude data of Groves model, and their deviation ranges from the exponential model of standard atmosphere density are ±67%. The simulation result shows that AOTV can accomplish orbital transfer and save much fuel in the four “unknown” atmosphere densities. The simulation result also verifies that the designed guidance law is correct and feasible, and it is able to compensate the disturb of atmosphere density in a large range.更多还原