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基于FULMS算法的压电机敏柔性结构振动主动控制.docx

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基于FULMS算法的压电机敏柔性结构振动主动控制 Abstract: Thedevelopmentofsmartstructureshasmadeasignificantcontributiontotheaerospaceindustry.Inthispaper,wefocusontheactivecontrolofapiezoelectricmachine-sensitivityflexiblestructureusingtheFullyUncoupledLeastMeanSquare(FULMS)algorithm.Thispaperprovidesanoverviewofpiezoelectricmaterials,smartstructures,andtheirapplicationinaerospaceengineering,alongwiththeprincipleoftheFULMSalgorithm.TosubstantiatetheeffectivenessoftheFULMSalgorithm,numericalsimulationsareperformedonathree-dimensionalflexiblestructuresubjectedtoharmonicloads.TheresultsdemonstratethattheFULMSalgorithmisabletosignificantlyreducethevibrationamplitudeofthepiezoelectricmachine-sensitivityflexiblestructure. Introduction: Piezoelectricmaterialspossessuniqueelectromechanicalcouplingpropertiesandhavebeenwidelystudiedfortheirapplicationinsmartstructures.Thepiezoelectriceffectreferstotheabilityofcertainmaterials,suchasquartz,toproduceanelectricalchargeinresponsetoanappliedmechanicalstressorstrain.Conversely,thematerialswilldeformwhenavoltageisapplied.Thischaracteristichasbeenappliedtosmartstructurestocontrolthestructuraldynamicsandreducethevibrationamplitudes. Activecontrolofstructuresusingpiezoelectricactuatorshasgainedmuchattentioninrecentyearsduetotheirhighcontrolefficiencyandrapidresponsetime.Inthispaper,weproposetheuseoftheFULMSalgorithmforactivecontrolofapiezoelectricmachine-sensitivityflexiblestructure.TheFULMSalgorithmisapopularadaptivefilteringalgorithmthatadjuststhefiltercoefficientsbasedontheminimizationoferrorbetweentheoutputsignalandthedesiredsignal. Smartstructureshavebeenappliedinaerospaceengineeringtoaddressthechallengesofreducingweightandfuelconsumption,enhancingsafetyandreliability,andimprovingperformance.Forinstance,theuseofsmartstructuresinaircraftwingshasenabledareductioninthenumberofmechanicalparts,weight,andconsequently,fuelconsumption.Additionally,theactivecontrolofsmartstructurescansignificantlyenhancetheresponsetoexternalloadsandreducethevibrationamplitude.