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1、振動(dòng)與沖擊第33卷第2O期JOURNALOFVIBRATIONANDSHOCK含橡膠軸承軸系振動(dòng)傳遞主動(dòng)控制研究胡芳，張志誼，吳天行，華宏星(1．上海交通大學(xué)機(jī)械與動(dòng)力工程學(xué)院，上海200240；2．武漢理工大學(xué)材料科學(xué)與工程學(xué)院，武漢430070)摘要：研究基于慣性式作動(dòng)器的軸系振動(dòng)主動(dòng)控制方法，用于抑制軸系振動(dòng)向彈性基礎(chǔ)傳遞。首先通過(guò)簡(jiǎn)化的軸系模型，分析了隨轉(zhuǎn)速變化的橡膠軸承支承特性導(dǎo)致軸系振動(dòng)特性顯著改變的原因，然后提出控制通道模型在線辨識(shí)與周期振動(dòng)抑制方法。使用LMS辨識(shí)算法和子空間濾波方法獲取軸系運(yùn)行狀態(tài)下的控制通道的脈沖響應(yīng)，濾除其中由
2、轉(zhuǎn)速調(diào)制的周期干擾信號(hào)，并使用內(nèi)嵌飽和抑制與干擾重構(gòu)的Filtered—XLMS算法構(gòu)建由轉(zhuǎn)速調(diào)制的周期干擾的抑制方法。仿真和試驗(yàn)結(jié)果表明，經(jīng)過(guò)濾波的脈沖響應(yīng)的在線辨識(shí)模型更加有效，而且控制方法能夠抑制轉(zhuǎn)速調(diào)制的周期干擾，減小彈性基礎(chǔ)振動(dòng)。關(guān)鍵詞：模型在線辨識(shí)；調(diào)制的周期振動(dòng)；Filtered—xLMS算法；振動(dòng)傳遞主動(dòng)控制中圖分類(lèi)號(hào)：U664．21文獻(xiàn)標(biāo)志碼：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
