Optimal feedback based control for Mars entry trajectory tracking  

作　　者：HUANG Yuechen LI Haiyang SHEN Hongxin 

机构地区：[1]College of Aerospace Science and Engineering, National University of Defense Technology [2]State Key Laboratory of Astronautic Dynamics,Xi'an Satellite Control Center

出　　处：《Journal of Systems Engineering and Electronics》2018年第1期134-141,共8页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(11372345)

摘　　要：The various uncertainties of Mars environment have great impact on the process of vehicles entering the atmosphere.To improve the robustness of control system against the model errors and to reduce the computational burden, an optimal feedback based tracking control law is developed. The control scheme presented in this paper determines the amplitude and the reversals of bank angle respectively in the longitudinal and lateral flight plane. At each control cycle, the amplitude of the bank angle is obtained by an optimal feedback controller to minimize tracking errors. The control gains are tuned according to the closed-loop error dynamics by using optimization methods. The bank reversals are executed if the crossrange exceeds a predetermined corridor which is designed by setting a boundary function. The accuracy and robustness of the proposed closed-loop optimal feedback based control law in tracking the reference trajectory is verified via500 deviation simulations, in which modeling errors and external disturbances are considered.The various uncertainties of Mars environment have great impact on the process of vehicles entering the atmosphere.To improve the robustness of control system against the model errors and to reduce the computational burden, an optimal feedback based tracking control law is developed. The control scheme presented in this paper determines the amplitude and the reversals of bank angle respectively in the longitudinal and lateral flight plane. At each control cycle, the amplitude of the bank angle is obtained by an optimal feedback controller to minimize tracking errors. The control gains are tuned according to the closed-loop error dynamics by using optimization methods. The bank reversals are executed if the crossrange exceeds a predetermined corridor which is designed by setting a boundary function. The accuracy and robustness of the proposed closed-loop optimal feedback based control law in tracking the reference trajectory is verified via500 deviation simulations, in which modeling errors and external disturbances are considered.

关 键 词：optimal control feedback gains Mars entry trajectory tracking Pontryagin's minimum principle 

分 类 号：N945[自然科学总论—系统科学]