无动力自动着陆轨道的鲁棒性分析  

Robustness Assessing of Unpowered Autolanding Trajectory

作　　者：孙春贞[1] 黄一敏[1] 郭锁凤[1] 

机构地区：[1]南京航空航天大学自动化学院,南京210016

出　　处：《中国空间科学技术》2006年第2期24-29,51,共7页Chinese Space Science and Technology

基　　金：国家863计划资助项目(2004AA764012)

摘　　要：文中定义了能量梯度的概念,作为评价能量积累和消耗能力的指标。针对跨大气层飞行器对象特性的特点,重点讨论了气动参数的不确定性存在时的着陆点性能、整个下滑轨道容许的气动参数的不确定性范围和对初始动压的抑制能力,结果表明下滑轨道具有较好的鲁棒性。The uncertainties in aerodynamics and initial conditions are considered for assessing the robustness of the trajectory. The approach of assessing the robustness is the same algorithms used in designing the original auto landing trajectory, i.e. the method based on the 3 degrees-of-freedom nonlinear equations of motion which governing dynamic pressure. The energy potential is defined as the measure of the ability to increase and decrease energy to remove energy dispersions. The touchdown characters, the allowable uncertainties in aerodynamics and dynamic pressure disturbance rejection are assessed when in the presence of uncertainties in aerodynamics. The result shows that the trajectory is robust.

关 键 词：自动着陆 鲁棒控制 轨道 飞行器 

分 类 号：V249.122.5[航空宇航科学与技术—飞行器设计] TP13[自动化与计算机技术—控制理论与控制工程]