05.1 - Flight Dynamics and Control (Control & Modelling)
THE EFFECT OF SATELLITE FORMATION FLYING ON AUTONOMOUS NAVOGATION
W. Yi¹, C. Xiaoqian¹, Z. Yong¹, B. Yuzhu¹; ¹College of Aerospace Science and Engineering, China
Combining the technologies of the satellite formation flying with the satellite to satellite tracking (SST), the effect of satellite formation flying on autonomous navigation is analyzed in this paper. Considering the effect of satellite formation flying, the autonomous navigation system with relative inertial-position vector measurement is proposed firstly. Then, observability of the system with the available measurements is investigated using the linear observability analysis, and the absolute state variable obsevability is obtained, excepting for quite a few special situations. Using Uscented Kalman filter(UKF), the accuracies of state estimation in different satellite formation flying, such as collinear formation, projection circular formation, space circular formation and Along-Cross-Radial(ACR)-Cartwheel formation, is investigated. It can be concluded from the analysis that the collinear formation flying is unobservable, and the ACR-Cartwheel formation flying is more effective and efficient in dealing with autonomous navigation problem. Lastly, the results are confirmed through the Monte-Carlo simulation.