Multi-objective Shortest Path Of Dynamic Topology For The Fractionated Spacecraft Network On Near-circular Orbits

Fractionated Spacecraft,considered to be the next generation of distributed system,has become the focus of oversea and domestic scholar in recent years.Model nodes of fractionated spacecraft network cooperate with other nodes and has the autonomy of less manual intervention,which can achieve information intervention and share resources with other model nodes.Structure of fractionated spacecraft system present a loose geometry.Network has the advantages of fast response,strong robustness,flexibility,low cost and so on.While facing high dynamic connection,time-dependent nature,randomness,limited power,delay and other challenges between model nodes,it is crucial to complete the mission of fractionated spacecraft for high QoS network performance.Hence according to the multi-objective of lowest power consumption and minimum delay,the main work is carried out as follows:Topology construction for the fractionated spacecraft network.According to relative distance between fractionated spacecraft network nodes bounded,this paper analyze and provide constraint conditions of the node initial orbit to construct the model based on SINR dynamic network graph and power consumption and delay.Multi-objective optimal path of dynamic topology construction for the fractionated spacecraft network.To the lowest power consumption,the minimum delay as the goal,using the method of graph theory.The problem of path optimization in high dynamic environment istransformed into the shortest path problem under time series in Orbital super-cycle,which makes the problem simplified.To establish the fractionated spacecraft scenarios of five nodes,which use STK software to achieve and carry out the shortest path in weighted graph,relative distance in high dynamic network,the relationship between SINR and time delay,provides an important basis for the next step work.