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时间:2020-03-21
《含橡胶轴承轴系振动传递主动控制研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、振动与冲击第33卷第2O期JOURNALOFVIBRATIONANDSHOCK含橡胶轴承轴系振动传递主动控制研究胡芳,张志谊,吴天行,华宏星(1.上海交通大学机械与动力工程学院,上海200240;2.武汉理工大学材料科学与工程学院,武汉430070)摘要:研究基于惯性式作动器的轴系振动主动控制方法,用于抑制轴系振动向弹性基础传递。首先通过简化的轴系模型,分析了随转速变化的橡胶轴承支承特性导致轴系振动特性显著改变的原因,然后提出控制通道模型在线辨识与周期振动抑制方法。使用LMS辨识算法和子空间滤波方法获取轴系运行状态下的控制通道的脉冲响应,滤除其中由
2、转速调制的周期干扰信号,并使用内嵌饱和抑制与干扰重构的Filtered—XLMS算法构建由转速调制的周期干扰的抑制方法。仿真和试验结果表明,经过滤波的脉冲响应的在线辨识模型更加有效,而且控制方法能够抑制转速调制的周期干扰,减小弹性基础振动。关键词:模型在线辨识;调制的周期振动;Filtered—xLMS算法;振动传递主动控制中图分类号:U664.21文献标志码:ADOI:10.13465/j.enki.jVS.2014.2O.013Activevibrationtransmissioncontrolofashaftingsystemwithwate
3、rlubricatedrubberbearingsHUFang,ZHANGZhi—yi,Tian—xing,HUAHong—xing(1.SchoolofMechanicalEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China;2.SchoolofMaterialScienceandTechnology,WuhanUniversityofTechnology,Wuhan430070,China)Abstract:Suppressingthevibrationofshaftingbea
4、ringsisaneffectivemeasuretoreducevibrationtransmissionfromtheshaftingtoitselasticsupports.Theactivevibrationtransmissioncontrolofashaftingsystem,consistingofwater—lubricatedbearingsandathrustbearingwasinvestigated,andanactivecontrolscenario,usinginertialelectromagneticactuator
5、stotranquilizethethrustbearingwaspresented.Intheactivecontrol,anonlineidentificationandafilteringalgorithmwereappliedtoestablishthecontrolchannelmodelinfluencedbytheshaft-speed·-dependentcharacteristicsoftherubberbearings.Asimplifiedphysicalmodelwasintroducedtoexplorethemechan
6、ismofthespeed-dependentcharacteristics.TheLMS—basedadaptiveidentificationalgorithmandthesubspacefilteringalgorithmwereadoptedtoderiveforthecontrolchannelanFIRmodelwithoutnoisecontaminationcausedbyspeed—modulatedperiodicaldisturbances.Thetransmissionsuppressionwasrealizedviathe
7、Filtered—XLMSalgorithmwithtwoadditionalunitsfordisturbancereconstructionandsaturationalleviation.ThesimulationandexperimentalresultsdemonstratethattheonlineidentificationoftheFIRmodeliseffectiveandtheactivecontrolmthodisabletosuppressthespeed—modulatedperiodicalvibrationofshaf
8、tingbearings.Keywords:onlinemodelidentification;modulatedperi
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