Hybrid Structure and Fuzzy Logic High Precision Control for Non-Geostationary Satellite Antenna Tracking

摘要

In recent years, the accurate control of the antenna pointing system faced an increasing development. New model and control scheme are here proposed to optimize the stability of a tracking platform for non-geostationary satellite antenna. Two different control schemes are compared to control the antenna; a conventional linear PI control scheme, and a FLC (Fuzzy Logic Controller)-based non-linear control scheme. Moreover, in this paper we consider the antenna tracking based on traditional actuator using only DC motor compared to a hybrid linear actuator consisting of a DC motor and a lead screw in series with a piezoelectric stack. The performances of these strategies and their characteristics are analyzed and discussed. The proposed schemes are modeled in Matlab/Simulink environment in order to validate their practical applications by computer simulations.