Research On Mission Planning Method Of On-orbit Servicing Spacecraft For Satellite Maintenance

Satellites,as an important part of the macroscopic information perception system,have the characteristics of high reliability,wide imaging range,no border restrictions,and long track time.It is one of the important means of collecting information and obtaining information,and it can be used to support necessary information for national development and various social activities.However,at present,satellites have the defects of high research and development costs,frequent failures and lack of systematic maintenance measures,which greatly affect the operational efficiency of satellites.At the same time,with the innovation and development of space technology,On-orbit Servicing(OOS)has gradually emerged.The maturity of on-orbit service technology has also spawned a new concept spacecraft,On-orbit Service Spacecraft.The development and improvement of Spacecraft has been actively promoted in recent years by countries,which provides the possibility of application of on-orbit servicing technology.In the context of on-orbit service implementation requirements and the technical development,this paper studies on-orbit servicing spacecraft mission planning for satellite maintenance,and discusses how to rationally arrange and deploy on-orbit servicing spacecraft resources.The main work of the paper can be summarized as:(1)Proposed the problem of on-orbit servicing spacecraft mission planning for satellite maintenance,and designed the corresponding problem solving framework.The paper first proposes the mission planning problem of on-orbit servicing spacecraft for satellite maintenance,and analyzes the source and research background.At the same time,the complexity of the problem is analyzed from the perspective of satellite targets and on-orbit servicing spacecraft.On this basis,a four-stage problem solving framework is constructed,that is,satellite requirement importance ranking,servicing spacecraft accessibility analysis for satellite targets,Resource allocation for on-orbit servicing spacecraft for satellite maintenance and path planning for on-orbit servicing spacecraft.(2)Constructed the corresponding on-orbit servicing spacecraft mission planning model according to the problem solving frameworkBased on the problem solving framework and the characteristics of each stage,the paper establishes the corresponding mathematical model.In the satellite requirement importance ranking stage,the satellite requirement importance ranking model integrates satellite performance and maintenance task urgency;in the satellite target accessibility analysis stage,based on Lambert's orbit maneuver,construct the corresponding spacecraft orbit maneuver model to judge the spacecraft accessibility for a satellite target;in the spacecraft resource allocation phase,the task allocation model is established based on the objectives of maximizing maintenance benefit and minimizing the time of mission fulfillment;in the on-orbit servicing spacecraft path planning phase,and the corresponding spacecraft mission planning model is established based on the trade-off of orbital maneuver fuel consumption and orbital maneuver time.(3)Designed a task planning algorithm for solving corresponding sub-problems based on research problem decompositionIn the sub-problem of on-orbit servicing spacecraft resource allocation for satellite target requirement,considering the defects of existing algorithms and the actual requirements of satellite maintenance tasks,a chaotic genetic algorithm based on multigroup parallel evolution is designed to allocate the spacecraft resources.In the subproblem of orbital spacecraft service path planning,considering the problem that the search space is large and mutually constrained,the multi-objective optimization algorithm is used to solve the problem,and an NSGA-II+GSDE algorithm based on global coordinate transformation is designed in order to improve the convergence ability of the algorithm,resulting a Pareto front with good characteristics.(4)Designed an example of on-orbit servicing spacecraft mission planning for satellite maintenanceAccording to the environmental monitoring problem in the realistic background,the on-orbit service spacecraft mission planning simulation scenario for environmental monitoring satellite maintenance is constructed to explore and verify the rationality of the problem solving framework proposed in this paper and the effectiveness of the problem solving algorithm.