Research On Collaborative Planning For Cover Area Of Inclined GEO Orbit Satellite Constellation

Multi-beam mobile satellite communication system has become an important part of current communication network due to its advantages of wide coverage area,strong realtime capability and large communication capacity.However,in order to realize the stable communication beam coverage of the communication satellite to the target area on the ground,orbit maintenance of the satellite is needed,which will consume a lot of fuel and lead to the greatly shortened life cycle of the satellite.Based on the above reasons,this paper takes the multi-beam communication satellite working in the low-dip GEO orbit as the research object,and analyzes the problem of the communication beam ground coverage area of such satellite.The main content includes the following four aspects:The multi-beam coverage area of the communication satellite is modeled.After the detailed comparison and analysis of the feasible modeling algorithm,the method of "first obtain the ground projection point of beam boundary vector,then fit the boundary curve of beam ground coverage area" is selected,and the parallel improvement is carried out for the specific solution process.At the same time,the method of using rotation matrix to solve the boundary vectors of other beams is proposed,which greatly improves the calculating speed of the boundary curve of the covering area.Multi-beam coverage stability design.Based on the analysis of the satellite constellation's communication beam ground coverage requirements,the overall coverage stability requirements of the constellation are reasonably decomposed into a single star unified index.According to the stability evaluation criteria of the beam covering region and the beam position stability,the design method of the beam covering region stability is proposed,and the rationality of the method is verified by simulation.Constellation multiple beam coverage area collaborative design.Based on the stability of each satellite's beam coverage region in the constellation,this chapter studies the continuity problem of the adjacent satellite's beam coverage region.Taking the adjacent boundary beams between satellites as the object of study,the relative position relation between the beams is introduced into the stability optimization index,and then the stability and continuity design of the co-optimized beams can be improved significantly.Multi-beam coverage planning based on superheuristic optimization algorithm.In view of the existing optimization algorithm(PSO)low calculation efficiency problem,put forward a kind of super heuristic optimization algorithm,introduced the position update equation is fully random items,to ensure global search,and analyzes the convergence of the necessary conditions,and higher dimensional performance verification function as the object,the performance of the algorithm was tested.Finally,the advantages of the superheuristic optimization algorithm are compared and analyzed.