Robust Guidance Law for Drag Tracking in Mars Atmospheric Entry Flight

摘要：

　　A robust entry guidance law is designed for drag tracking in Mars entry atmospheric flight for low-lifting lander with maximum lift-to-drag ratio of only 0.18.In the flight process the bank angle is the only control variable to be modulated to eliminate the tracking error when considering the initial derivation and parameter uncertainties.Firstly the tough problem of the guidance law design is analyzed which the input coefficient of the drag dynamics equations is uncertain due to kinds of parameter uncertainties.In this study,we divided input coefficient on both sides of the drag dynamics.Then the robust control applied to robot manipulators can be adopted for drag tracking in the entire Mars entry atmospheric flight.And we can guarantee uniform ultimate bounded stability of uncertain systems.Finally,Monte-Carlo simulation result demonstrates robust method leads to the landing precision within 15km of a specified parachute deployment piont while subject to significant parameters uncertainties.

关键词： Low-lifting vehicle Mars atmospheric entry fight robust guidance law parameter uncertainties

作者: WANG Da-yi GUO Min-wen

作者单位: Beijing Institute of Control Engineering,Beijing 100190;Science and Technology on Space Intelligent Control Laboratory,Beijing 100190,China

会议类型: 国际会议

会议名称: The 33th Chinese Control Conference第33届中国控制会议

会议地点: 南京

会议语种:英文

页码: 697-702

在线出版日期: 2014-07-28（万方平台首次上网日期，不代表论文的发表时间）