Disturbance observer-based robust guidance for Mars atmospheric entry with input saturation  

作　　者：Zheng Yiyu Cui Hutao 

机构地区：[1]Deep Space Exploration Research Center, Harbin Institute of Technology

出　　处：《Chinese Journal of Aeronautics》2015年第3期845-852,共8页中国航空学报（英文版）

基　　金：co-supported by the National Basic Research Program of China(No.2012CB720000);the National Natural Science Foundation of China(No.61174201)

摘　　要：Abstract With low-lifting capability taken into account, a robust guidance law for Mars entry vehicles with low lift-l：o-drag ratios, such as Mars Science Laboratory （MSL）, is presented. Consider the nonlinear term in the drag dynamic equation and bounded disturbances as a lumped disturbance, and design a linear disturbance observer （DOB） to estimate it. With the consideration of the control input saturation, an innovative sliding surface and a virtual system are introduced to design the guidance law. Analyses of disturbance observer performance and Lyapunov-based transient performance are also presented. It is shown explicit choices of design parameters. Simulation guidance law. that the drag tracking error can be adjustable by results confirm the effectiveness of the proposedAbstract With low-lifting capability taken into account, a robust guidance law for Mars entry vehicles with low lift-l：o-drag ratios, such as Mars Science Laboratory （MSL）, is presented. Consider the nonlinear term in the drag dynamic equation and bounded disturbances as a lumped disturbance, and design a linear disturbance observer （DOB） to estimate it. With the consideration of the control input saturation, an innovative sliding surface and a virtual system are introduced to design the guidance law. Analyses of disturbance observer performance and Lyapunov-based transient performance are also presented. It is shown explicit choices of design parameters. Simulation guidance law. that the drag tracking error can be adjustable by results confirm the effectiveness of the proposed

关 键 词：Disturbance observer GUIDANCE Input saturation Mars atmospheric entry ROBUSTNESS 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]