Design And Implementation Of Satellite Interconnection Measurement And Control System Based On Load Balancing Scheduling

With the rapid development of space technology,the number of satellites launched in orbit increases dramatically,and the ground TT&C network becomes more and more complex.The efficiency of satellite ground TT&C system is the key factor affecting the completion of space mission.The increase of satellites and ground stations puts forward higher requirements for TT&C system.The key of multi-satellite and multi-station joint TT&C is the efficient scheduling and reasonable planning of TT&C resources,and the implementation of scheduling scheme by using TT&C platform to achieve the purpose of integrating TT&C resources and improving the receiving rate of satellite data.Based on the in-depth investigation of Satellite TT&C scheduling algorithm and TT&C network development at home and abroad,this paper proposes a satellite TT&C scheduling algorithm based on improved genetic algorithm,designs and implements a scheme of satellite interconnected TT&C system.The main research contents of this paper are as follows:1.Based on the detailed study of the data transmission process between satellite and ground TT&C station,the different requirements and resource constraints in the process of satellite TT&C are analyzed.On this basis,the relationship between TT&C and scheduling objectives,resource constraints and other factors is studied,and a satellite integrated TT&C scheduling model is established.2.Based on the research of traditional Satellite TT&C scheduling system based on FCFS algorithm,by using heuristic algorithm,a satellite TT&C scheduling algorithm based on improved genetic algorithm is proposed.In this algorithm,gene selection based on conflict coefficient and "piecewise reverse order" mutation for low fitness individuals are proposed.Through a number of simulation experiments,the effectiveness of the proposed scheduling algorithm is verified.3.Based on the designed satellite TT&C scheduling algorithm,a scheme of satellite interconnected TT&C system is proposed.The functional modules of the system are specifically designed,and according to the characteristics of satellite TT&C work,RPC service mode and NIO based concurrent service mode are designed.At the same time,the communication protocol of data transmission between objects in the system is designed.4.According to the design scheme,the satellite interconnected TT&C platform is developed and the function test of each module is completed.The platform is the engineering realization of the scheduling algorithm and system scheme designed in this paper,including the construction of hardware system and the development of software system.Based on this platform,the feasibility and reliability of the scheduling algorithm and the designed TT&C system scheme are verified.