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ID:30076133
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时间:2018-12-26
《谁有克莱斯勒标准pf-10141-阻尼测试)的中文版》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、DAIMLERCHRYSLERCORPORATIONNo:PF-10141PerformanceStandardDatePublished:2002-12-13CategoryCode:Q-2Change:AEASLReq.:NoDAMPING-BRAKEROTOR/DRUM阻尼–制动盘/鼓1.0GENERAL概述1.1PurposeoftheStandard目的Thisstandarddefinesdampingperformancerequirementsofbothdiscbrakerotorsandbrakedrums.Boththerot
2、oranddrumaresourcesofallvarietiesofbrakenoise.Thequantityofdampingpresentinarotororbrakedrumaffectsthenoiseperformanceofthebrakesystem.Notethatthelevelofdampingtypicallyaffectsthenaturalfrequencyofthepartaswell,changingtwoimportantpropertiessimultaneously.Ifitwerepossibletohol
3、dnaturalfrequencyconstant,thehigherthequantityofdamping,thelessaptthebrakesystemistomakenoise.Specifyingaminimumamountofdampingforarotororbrakedrumisonemethodofcontrollingbrakesystemnoise.Trackingvariabilityofdampinglevelsfromproductionlottolotisexpectedtoofferinsightintoobtai
4、ningbetterprocesscontrolaswell.Acommonlyutilizednon-dimensionalmeasureofavibratorysystem'sdamping,thequalityfactor(Q-factor),quantifiesarotorordrum'sdampingperformance.ThelowertheQ-factor,thebetter(higher)thedampingperformance.本标准定义了制动盘和制动鼓的阻尼性能要求,制动盘鼓是制动噪声的源头,制动盘和制动鼓的阻尼值影响制动系
5、统的噪音指标,阻尼大小影响固有频率,如果使固有频率不变,阻尼越大,则制动系统越不易产生噪声;限定制动盘和鼓的最低阻尼值,是控制制动系统噪声的途径之一.。跟踪每个生产批次的盘/鼓阻尼变化量,同样能有助于考察工序过程控制的好坏,通常使用的震动系统非尺寸类测量参数—质量参数(Q参数)量化了盘/鼓的阻尼参数,Q值越低,阻尼性能越好1.2CoverageofthisStandard标准适用范围Thisstandarddefinesdampingrequirementsforfrontdiscbrakerotors,reardiscbrakerotors,an
6、dreardrumsusedonDaimlerChryslervehicles.本标准定义了用于戴姆勒-克莱斯勒公司车上用的前、后制动盘和制动鼓的阻尼要求2.0SPECIALTESTEQUIPMENT特殊试验设备Table1containsitemsrequiredtomeasurerotorordrumQ-factors.APC-basedsemi-automatedtestingsystem,Rotor-Q,isavailabletoperformthesemeasurementsmuchmorequicklyandaccurately.Thi
7、scanbeobtainedfromSignalysisofCincinnati,Ohio,throughBruel&Kjaer.Itemsmarkedwithanasteriskarerequiredonlyformanualmethodtesting.Bothmanualandsemi-automatedsystemsutilizeproprietaryDaimlerChryslerpatentedconfidentialtechnologyandassuchshouldbeusedonlyforDaimlerChryslerrelatedte
8、stingandmeasurements.表1列出了测量Q参数所需仪器,对盘的Q值,一种基于计算机的半自动测试系统可更快速
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