预览加载中，请您耐心等待几秒...

基于x-LMS算法的振动主动控制系统研究与开发.docx

预览
1/4
2/4
3/4
4/4

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于x-LMS算法的振动主动控制系统研究与开发 Abstract: Vibrationactivecontrolsystemisoneofthemostimportantresearchtopicsinmodernengineeringfield.Thispaperproposesanovelactivecontrolsystemalgorithm,x-LMS(ExtendedLeastMeanSquares),toreducevibrationinpracticalapplications.ThisalgorithmisbasedonthetraditionalLMSalgorithm,andhasglobalconvergencecharacteristics,whichcansignificantlyimprovetheperformanceoftheactivecontrolsystem.Thex-LMSalgorithmisimplementedandtestedonaprototypeactivecontrolsystem,andtheexperimentalresultsshowthatthisalgorithmcaneffectivelyreducethevibrationamplitudeofthestructureunderdifferentexcitationconditions. Introduction: Vibrationisacommonphenomenoninmanyengineeringsystemssuchasautomobiles,airplanes,ships,andbuildings.Uncontrolledvibrationcancauseequipmentdeterioration,noise,andfatiguedamage,whichisaseriousthreattothesafetyandreliabilityoftheengineeringsystem.Therefore,vibrationcontrolhasbecomeoneofthecriticalresearchareasinthefieldofmechanicalengineering. Activecontrolofvibrationisoneoftheapproachestoreducevibrationinindustrialsystems.Itisbasedontheprincipleofsuperpositionofsoundwaves,whichproducesadestructiveinterferencewavetoattenuatetheunwantedvibration.Theactivecontrolsystemconsistsofasensortodetectthevibrationsignal,acontrollertocalculatethecontrolsignal,andanactuatortogeneratethecounteractingforcetoattenuatethevibration.Amongthesethreecomponents,thecontrollerplaysacrucialroleindeterminingtheperformanceoftheactivecontrolsystem. Inrecentyears,manyalgorithmshavebeenproposedtoimprovetheperformanceoftheactivecontrolsystem.ThemostcommonlyusedalgorithminpracticalapplicationsistheLeastMeanSquares(LMS)algorithm.However,thetraditionalLMSalgorithmhassomedrawbacks,suchasslowconvergencerateandlimitedglobalconvergence.Therefore,severalextensionalgorithmshavebeenproposedtoimprovetheperformanceoftheLMSalgorithm. Inthispaper,weproposeanextendedLMSalgorithm,x-LMS,toimprovetheperformanceoftheactivecontrolsystem.Thex-LMSalgorithmhasglobalconvergencecharacteristicsandafasterconverge