Research Of TV Antenna Automatic Tracking System For Vehicle

In order to greet Beijing in 2008 the technical Olympic Games, realizes on the long-distance bus, the train can watch the scene direct seeding the sports competition program, this article uses the simple practical reliable mechanical system, utilization modern transmitter, combined with electric compass, and GPS, uses the 80C196MC single chip microcomputer fine control performance, designed the vehicle to carry the satellite TV antenna automatically to aim at the satellite system, has produced the plan basic principle, was allowed to realize on the movement vehicles can receive the satellite TV signal, its core was the use automatic control principle and the computer principle design antenna controller, controlled the receiving antenna through control AC servo electrical machinery change with the rotation speed according to the certain directional rotation, Changes the antenna the azimuth and the angle of pitch causes it to aim at the satellite, thus realization satellite TV signal receive.In order to enable the Earth station antenna the automatic tracking satellite, since the first satellite launch, the antenna automatic tracking technology always has been the satellite communication attention focal point. This article introduced several kind of basic automatic tracking loops and to their track speed, the tracking accuracy as well as the natural price compared with the comparison, after the compromise had considered this system selected the conical scanning track method.In this paper, the selection of vector control variable frequency AC servo speed control system with fuzzy self-tuning PID method of AC servo position control system, finally using MATLAB / Simulink tools for vector control system simulation, the method proved the superiority of fuzzy PID.