Theory and experiment of observer based magnetostrictive self-sensing actuator-中国期刊网

摘要 Giantmagnetostrictiveactuators(GMAs)oftenworkinaclose-loopfeedbacksystem.Thissystemneedsindependentsensorswhichmaybedifficulttobefixed,besides,excessivesensorsmaycausemoreunpredictedproblemsinalargesystem.Thispaperaimstodevelopaself-sensingGMA.Anobserverbasedonpiezomagneticequationsisconstructedtoestimatethestressandstrainofthemagnetostrictivematerial.Theobserverbasedself-sensingapproachdependsonthefactsthatthemagneticfieldiscontrollableandthatthemagneticinductionismeasurable.Aimingatthenonlinearhysteresisinmagnetization,ahys-teresiscompensationobserverbasedonPreisachmodelisdeveloped.Experimentverifiedtheavailabilityoftheobserverapproach,andthehysteresiscompensationobserverhashighertrackingprecisionthanlinearobserverfordynamicforcesensing.

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Theory and experiment of observer based magnetostrictive self-sensing actuator

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Theory and experiment of observer based magnetostrictive self-sensing actuator

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