Title :
Relative attitude determination for fly-around based on UKF
Author :
Jin, Yongqiang ; Liu, Xiangdong ; HOU, Chaozhen
Author_Institution :
Dept. of Autom. Control, Beijing Inst. of Technol., Beijing
Abstract :
To solve the problem of relative attitude determination of a deputy satellite with respect to chief satellite in fly-around, unscented Kalman filter (UKF) method of relative attitude determination is presented. The minimum representation of the attitude, modified Rodrigues parameter (MRP) is adopted as the attitude representation parameter. Combination of gyro, star tracker and laser rendezvous radar are employed as the attitude sensors. The state equation of relative attitude determination is obtained with consideration of relative attitude dynamic equation. Therefore, the UKF model is constructed. Simulations are done and the comparison with that of extended Kalman filter (EKF) shows that the UKF method has a faster convergence speed and a higher estimation precision.
Keywords :
Kalman filters; artificial satellites; attitude control; attitude measurement; deputy satellite; extended Kalman filter; laser rendezvous radar; modified Rodrigues parameter; relative attitude determination; star tracker; unscented Kalman filter method; Equations; Filtering; Kalman filters; Laser modes; Laser radar; Materials requirements planning; Position measurement; Radar tracking; Satellites; Spaceborne radar; fly-around; laser rendezvous radar; relative attitude determination; unscented Kalman filter;
Conference_Titel :
Intelligent Control and Automation, 2008. WCICA 2008. 7th World Congress on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-2113-8
Electronic_ISBN :
978-1-4244-2114-5
DOI :
10.1109/WCICA.2008.4593896
