Chinese Space Science and Technology ›› 2013, Vol. 33 ›› Issue (3): 1-7.doi: 10.3780/j.issn.1000-758X.2013.03.001

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HybridSteeringLawwithFeedbackandFeedforwardforSingleGimbalControlMomentGyroscopes

 WU  Zhong, DENG  Shi-Long, WEI  Kong-Ming, GUO  Lei   

  1. (SchoolofInstrumentationScience&OptoelectronicsEngineering,BeihangUniversity)
  • Received:2012-09-07 Revised:2012-12-20 Published:2013-06-25 Online:2013-06-25

Abstract: Inordertoimprovetheperformanceinsingularityavoidanceandescapeofthedynamicsteeringlawforsinglegimbalcontrolmomentgyroscopes(SGCMGs),ahybridsteeringlawwithfeedbackandfeedforwardwasproposed.WhenSGCMGswasnotsingular,thedynamicsteeringlawwithfeedbackwasused.WhenSGCMGsapproachingtoorlockedinthesingularpoints,thefeedforwardwasconstructedtohelpthemavoidordetourroundthesingularpoints.Comparedwiththeconventionaldynamicsteeringlaws,thehybridonehasmuchmoresuperiorperformancesinsingularityavoidanceandescape.Meanwhile,thealgorithmhaslittlecalculationamountandiseasytoimplementsinceitonlyneedsthetransposeratherthanthepseudoinverseoftheJacobianmatrix.Extensivesimulationresultsdemonstratetheeffectivenessofthealgorithm.

Key words: Kinematicsingularities, Controlmomentgyroscopes, Hybridsteeringlaw, Attitudecontrol, Spacecraft