Abstract:

For the problem of precise dynamic relative positioning between maneuvering spacecraft, a dynamic relative positioning algorithm based on the strong tracking filter(STF) is proposed. In consideration of the difference among the three directions in relative maneuvering, a threedirectionsfilter is set up to avoid the decline of tracking accuracy due to the unmatch between the onedirectionfilter and the actual maneuver. For the tracking problem of the threedirectionsfilter under the Cartesian coordinate system, the converted measurement algorithm is presented, to overcome the deviation problem in the spherical coordinate system and Cartesian coordinate system conversion. Through simulation and analysis, it shows that, the algorithm is better than the other algorithms on initial value sensitivity and relative maneuvering recovery, and is suitable for spacecraft dynamic relative precise positioning in a variety of circumstances such as pulse thrust maneuvering, limited thrust maneuvering and so on.