Research on Attitude and Orbit Control Method of Micro-Nano Satellite Circumnavigating for Space Stations Maintenance
Addressing the complexity of micro-nano satellites performing close flyby inspection mis-sions for space station maintenance,a dynamic model for attitude and orbit was established.An in-novative segmented design method for combined attitude and orbit control was proposed.During the observation segment,an optimized two-point boundary value problem approach was adopted to derive a free-drift trajectory that could meet the observation requirements.Subsequently,based on a non-singular terminal sliding mode finite-time attitude controller,the attitude control law for the micro-nano satellite was designed to satisfy the trajectory and observational attitude needs.Finally,during the transfer segment,an optimal control method was used to optimize the low-thrust transfer issue,a-chieving a fuel-optimal inspection trajectory design.The simulation results demonstrated that under the action of the segmented solution design control,the micro-nano satellite could effectively avoid collision with the space station during the flyby process and achieve ultra-close distance observation and inspection.These research resolved the conflict in attitude caused by simultaneous observation and maneuvering.
flyby and inspectionattitude controlorbital controlclose-range observationspace station maintenance
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