直升机主减速器周期撑杆混合振动控制的机电耦合特性及工作机理研究

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关键词：直升机；振动与噪声；周期结构；混合振动控制 中图分类号：TB535；TH132.46 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202508008

Abstract：The harmonic vibrationproducedbythe gear meshinginthehelicopter'smainreducerisoneofthemain sourcesof noise inthehelicoptercabin.Designingvibrationsolatinggearboxstruts tosuppressvibationtransmissiontoteairframecanectively reducecabin noise.The piezoelectric stack actuators periodic strut（PSAPS），composedof periodically arranged piezoelectric stacksand metalic materials，demonstrates‘mechanicalfiltering’characteristicswithinspecificfrequencybands，servingasapas sivevibrationcontrolmethod.ByadjustingthedrivingvoltageofpiezoelectricstacksinPAPStoachievevariablestifesscharac teristics，activevibrationcontrolisenabled.Inordertostudytheelectromechanicalcouplingrelationshipbetweenactivevibration controland passvevibrationcontrolofSAPSs，aspecializedPAPSconfigurationisdeveloped toadresshlcoptergeares ing noisesuppresion，andtheelectromechanicalcouplingdynamic modelofPSAPSs withtheformof tansfermatrix isestablishedforthemechanicalfilteringcharacterstisofperodicstructureandelasticwavepropagationinpiezoelectricstack.Infrequen cydomain，theforceandvelocityatbothendsof thePSAPs，thedrivingvoltageandcurrnt，the geometricalparametersofthe strutandthematerialparametersarecoupledinthis model.Inthispaper，themaximumatenuatiorateof thePSAPScanbeobtainedunderthelimitationofthemaximumdrivingvoltageandcurentofthepiezoelectricstackbyusingthismodel.Theinfluence of rubberdamping lossfactor，excitation force，andcellnumberinPSAPSontherequireddriving voltageandcurentforactive control is analyzed in thisarticle.

Keywords：helicopter;vibration and noise；periodic structure；hybrid vibration contro

直升机主减速器产生的齿轮啮合噪声是直升机舱内噪声的主要来源之—[1-5]。（剩余12809字）