Motion Estimation of Target Spacecraft Using Modular Unscented Filtering
This paper describes the motion estimation of target spacecraft (target) by another spacecraft (chaser) at close distance in a near orbit. The unscented filter is used for estimating the position and the attitude of target. The states of target estimated using line-of-sight measurements to known landmarks of the target provided from vision system aboard the chaser. In order to reduce computation and complexity, the prediction and updated step of the unscented filter are modularized. In the prediction step, the sigma points associated with target states only propagates through the nonlinear dynamics. The full predicted sigma points used in the update step includes the predicted sigma points and secondary sigma points calculated from the estimates and covariance of chasers states from its own navigation system. The feasibility of the proposed approach is demonstrated by numerical simulations.
unscented Kalman filter vision sensors motion estimation
Kwangyul Baek Hyochoong Bang
Department of Aerospace Engineering, KAIST,291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea
国际会议
2011年亚太航空航天技术学术会议(APISAT 2011)
澳大利亚
英文
1-9
2011-02-28（万方平台首次上网日期，不代表论文的发表时间）