基于阶次分析的新能源汽车动力总成早期故障诊断的应用和研究

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Application and Research of Early Fault Diagnosis in New Energy Vehicle Powertrains Based on Order Analysis

Shen Le Zhu Lin Han Xu Zeng Xiangxin Wang Tao Wuhan Daan Technology Co.，Ltd.，Wuhan 430051，China

Abstract：Tofacilitatetheearlydetectionoffaultsinthepowertrainofewenergyvehicles，thisstudyemploysanearlyfaultdiag nosisandanalysissystmtocollctvbrationdataduringtetestingofelectricdriveassembliesandperformsfultdetetionacoding ly.Basedonthesructureofthemotorandreducer，anordercalculationmodelforgears，shaftsandothercomponentsisstablished. Usingthecollectedvbrationdataissuesintepowertrainareanalyedndfultocationsareidentificatedthroughtrendindiceswaterfallplots，spectrumdiagrams，ndotheranalyticalmethodsgroundedinthemodel.Teanalysisresultsaresubsequetlyerifid throughphysicaldsassemblyTefidingsdemonstrate thattearlyfaultdiagnosisandanalysissystemcaeectivelyidentifyproductisuesatanearlystage，uratelypipoint thelocationandcauseoffults，therebycontributig toproductprotetionorteing thedevelopment cycle，reducing R&D costs，and holding significant positive implications for product development.

KeyWords：Order analysis;Early fault diagnosis;New energy vehicle powertrains;Durability test

1前言

随着新能源汽车市场的不断扩大，电机朝着高功率、高转速方向不断发展，动力总成也朝着高集成化方向前进，这也就意味着动力总成系统的可靠性和耐久性试验愈发为各车企所重视。（剩余4703字）