A novel two-stage extended Kalman filter algorithm for reaction flywheels fault estimation  

作　　者：Chen Xueqin Sun Rui Jiang Wancheng Jia Qingxian Zhang Jinxiu 

机构地区：[1]Research Center of Satellite Technology, Harbin Institute of Technology [2]School of Aeronautics and Astronautics, Shanghai Jiao Tong University

出　　处：《Chinese Journal of Aeronautics》2016年第2期462-469,共8页中国航空学报（英文版）

摘　　要：This paper investigates the problem of two-stage extended Kalman filter （TSEKF）-based fault estimation for reaction flywheels in satellite attitude control systems （ACSs）. Firstly, based on the separate-bias principle, a satellite ACSs with actuator fault is transformed into an augmented nonlinear discrete stochastic model; then, a novel TSEKF is suggested such that it can simultane- ously estimate satellite attitude information and actuator faults no matter they are additive or mul- tiplicative; finally, the proposed approach is respectively applied to estimating bias faults and loss of effectiveness for reaction flywheels in satellite ACSs, and simulation results demonstrate the effec- tiveness of the proposed fault estimation approach.This paper investigates the problem of two-stage extended Kalman filter （TSEKF）-based fault estimation for reaction flywheels in satellite attitude control systems （ACSs）. Firstly, based on the separate-bias principle, a satellite ACSs with actuator fault is transformed into an augmented nonlinear discrete stochastic model; then, a novel TSEKF is suggested such that it can simultane- ously estimate satellite attitude information and actuator faults no matter they are additive or mul- tiplicative; finally, the proposed approach is respectively applied to estimating bias faults and loss of effectiveness for reaction flywheels in satellite ACSs, and simulation results demonstrate the effec- tiveness of the proposed fault estimation approach.

关 键 词：Fault estimation Reaction flywheels Satellite attitude control sys-tems Separate-bias principle Two-stage extended Kalmanfilter 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计] V467