Relative navigation for long or medium range autonomous rendezvous with a noncooperative target is discussed. Second-order approximation of the relative dynamics equations between the two spacecraft is presented. Observability of the line-of-sight (LOS) navigation is analyzed, and a double LOS measurement relative navigation strategy is proposed. A processing noise model of the relative navigation system is developed based on the relative dynamics equations between spacecraft within long distances. A measurement model is established, which includes the LOS angles of the target relative to the two spacecraft and both the azimuth and the length of the measurement baseline. An extended Kalman filter (EKF) algorithm is used to estimate the relative position and velocity of the target. The simulation results demonstrate the validity of the navigation method and are used to analyze variation characteristics of the geometric parameters among the spacecraft.
WANG Kai, CHEN Tong, XU Shijie
. A Method of Double Line-of-sight Measurement Relative Navigation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(6)
: 1084
-1091
.
DOI: CNKI:11-1929/V.20101213.1757.006
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