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With the cause of the rapid development of satellite communications , and satellite communications has a large coverage area , stable communication , good signal quality , it has been widely applied in the fields of military , public security , meteorology , radio and television . The satellite antenna is in integral part of the satellite communication system , the servo control system of the satellite antenna has a very important significance . Car satellite antenna automatically Star control system developed for the background , through in-depth research and analysis of existing antenna control system , the DC motor drive . The modern integrated use of GPS, electronic compass , inclinometer sensor based on the design of the automatic vehicle-mounted satellite antenna servo controller microprocessor to ATmegal280 . First, we discussed the antenna turntable posture , spatial coordinate transformation theory for solving satellite tracking angle formulas . Secondly , elaborated step tracking, conical scan tracking and single pulse tracking a common satellite tracking technology , analysis and comparison of the advantages and disadvantages of the various ways . Specific project implementation based on system composition and working principle of the system . GPS, electronic compass , digital tuner , beacon receiver , DC motor drives , keys , displays , communications, and other critical hardware circuit design . The software design is modular and hierarchical structure , the system is a key star function . By a number of environmental testing and vehicle test system developed in this article is feasible and effective , and has basically reached the design requirements , to meet under different conditions quickly and accurately align the satellite , to ensure the normal work of the satellite communication system . And the system is also used in the system of emergency communications command vehicle , by actual use , the system has a reliable stability and high tracking accuracy , which is a low-cost automatic control successful attempt to have a high value in use and promotional value.
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