Research On Pointing Strategy And Control Of The Spot-beam Satellite Antenna

Along with the development of the satellite communications of our country, and the payload growing demands of satellite, because of movable spot-beam antenna has the high effective radiated power, and the ability to accurate controlling the pointing to areas, has been more and more used in all kinds of aircraft. Pointing of the antenna, as its goal to gain the main means to cover, which is very important to satellite communication, in this paper, the research is carried out from three aspects as the spot-beam antenna pointing calculation, pointing strategy and pointing control.This paper firstly discusses with all kinds of the frame of reference involved in orbital model and the conversion relation, and then establishes a high precision orbital model, provide the orbital platform for the antenna pointing computing.Based on this, establish a real-time calculation model of the antenna pointing to the target for forward direction and reverse direction.Then, bring antenna power radiation model into satellite pointing calculation, specific to multi-goals satellite gain problems, put forward the gain of innovative without restraint, the constraint condition antenna pointing optimization strategy, for the three goals points to, the target point to gain the most advantage in three goals, is in the consists of the triangle center of gravity ,it is a important conclusions to guide the antenna to gain coverage to have important engineering meaning.In the end of the article, set up the satellite antenna multibody dynamics model, and designed a kind of satellite antenna pointing matrix and collaborative controller, the antenna to cause disturbance posture movement matrix compensate, and at the same time, a matrix of antenna pointing gesture deviation revised, the simulation results show that the controller can be realized in the attitude of the disturbance of reducing and at the same time, improve the precision of the antenna pointing and dynamic response characteristics, the controller design of antenna pointing has important reference value. Worth explanation is, different antenna pointing Angle to for input parameter antenna controller, this paper based on the ground controller to target longitude and latitude, can realize the coordinate tracking moving target, and other functions, has more engineering significance.The main innovation points are antenna gain coverage to more target optimization strategy project model, and tracking ground targets of longitude and latitude satellite antenna controller design.