Abstract: Withthedevelopmentofthemicro/nanosatellites,theproblemofthestationcontrolneedstobesolved.Thetraditionalpropulsiontechnologycan′tmeettherequirementsofhighprecision.Therefore,theSiCMEMSMicrothrusterarraywasproposedfortheformationkeepingofthemicro/nanosatellites.Consideringthedifferentcharacteristicsofthearrayfromthetraditionalthruster,theinputandoutputmodelwasestablishedandtheinstantaneouspulsecontrolstrategywaspresentedtokeeptheformation.Thesimulationresultsshowthatthearraycanbeappliedtotheneardistanceformationofmicro/nanosatellites,andithasahighpositionaccuracyof3mm.Inaddition,thethrusters′consumptionandcontrolprecisioninfluencedbythesinglethrusterchargeandcontrollerparameterswereanalyzed.Whentheimpulseofthesinglethrusterrangeis8×10-6~20×10-6N·s，itcangetgoodcontrol.

Key words: satelliteformationkeeping, MEMS;microthruster, instantaneouspulsecontrol, parameteroptimization, micronanosatellite