The Study & Application on Shipborne Satellite Antenna Automatic Tracking System

For the shipborne satellite antenna system，owing to the continuous change of the carrier’s position and pose as the time passing, we must conduct real-time measurement on the pose of satellite antenna, so that the satellite can be aimed through servo control system. In this paper, the hardware and software about the shipborne satellite antenna system are introduced. Three-dimensional closed-loop servo control system which is made of three kinds of pose sensors is implemented to isolate the links between the antenna pose and the carrier’s position and pose. FSK serial communication is adopted to realize a reliable control commands and data transmission between the control unit above the deck and the control unit under the deck. Conical spiral scan based on the best AGC signal realizes automatic tracking satellite and locking it. The result of the examination shows that the pointing of antenna is of steadiness, precision(the point precision is less than 0.3 degrees), real time and speediness(the capture time is less than 25 seconds ).