| Abstrakt: |
Research is conducted, for the security and reliability of the failed satellite's on-orbit operation, on the position and attitude estimation of the failed satellite in the close-distance approach. On the basis of the analysis on the characteristic and the motion mode of the failed satellite, the observation model of a stereo vision system based on the feature point of the failed satellite surface is not only connected with relative position and attitude, but also has some links with the chaser satellite's position and attitude. Thus, a method of relative position and attitude is proposed as well as the chaser satellite's position and attitude in this paper. First, the relative position, the relative attitude, the chaser satellite's position, and the chaser satellite's attitude are established. Then, according to the state model, and the observed model of the stereo vision system, GPS, star sensor, and extended Kalman filter are designed. Finally, the simulation shows that: relative position and attitude of the two satellites are estimated, and the chaser satellite's position and attitude are also estimated at the same time, which show high precision. [ABSTRACT FROM AUTHOR] |
