인공위성의 Autonomous Station Collocation을 위한 피이드백 제어법칙 개발

Abstract

A feedback control law design technique is discussed for autonomous station collocation of two satellites in this study. The station collocation is achieved by the combination of a priors planned reference trajectory and a feedback control law which controls the error between the reference trajectory and actual trajectory. The geometric configuration of two satellites on the orbit prescribed in the Earth Centered Inertial(ECI) coordinate system is transformed into orbital frame components providing relative position of the two satellites, which is used for the controller design. Furthermore, a state vector estimator is implemented using Extended Kalman Filter algorithm which is based upon relative range and range rate between the two satellites.