汽车平顺性分析中时域法和频域法的对比

《汽车平顺性分析中时域法和频域法的对比》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、学兔兔www.xuetutu.com汽车工程2012年(第34卷)第4期AutomotiveEngineering2012(Vo1．34)No．42012061汽车平顺性分析中时域法和频域法的对比徐中明，周小林，余烽，张芳，谭建林(1．重庆大学，机械传动国家重点实验室，重庆400030；2．重庆大学机械工程学院，重庆4000303．湖南南车时代电动汽车股份有限公司技术中心，株州400054)[摘要]依据国际标准IS02631和国标GB／T4970(汽车平顺性随机输入行驶试验方法》，对某客车进行了行驶平顺性试验，重点研究了不同算法在平顺性分析中的差别。以FAMOS、VC&

2、MATLAB为软件开发平台，在Parse—val定理基础上实现了时、频域两种算法。结果表明，各种算法计算结果差别不大但各有特点，时域法对峰值系数更加敏感，可用于从人体舒适性角度评价平顺性；频域法则适用于分析1／3倍频程各频带对人体振动的影响并为改善汽车平顺性提供依据，但存在精度较低、处理效率不高等问题。而频率法中两种谱估计法的对比结果表明，Welch经典谱估计法的一致性较差，而采用AR模型的YuleWalker估计法性能相对稳定。关键词：汽车；平顺性；时域法；频域法；功率谱估计ComparisonBetweenTimeandFrequencyDomainMethodin

3、VehicleRideComfortAnalysisXuZhongming，ZhouXiaolin，YuFeng，ZhangFang&TanJianlin1．ChongqingUniversity，StateKeyLabofMechanicalChongqing400030；2．CollegeofMechanicalEngineering，ChongqingUniversity，Chongqing400030；3．ZhuzhouNationalEngineeringResearchCenterofConvertersCo．，Ltd．，Zhuzhou400054lAbst

4、ractJBasedoninternationalstandardIS02631andnationalstandardGB／T4970Methodofrandomin—putrunningtest-Automotiveridecomfort，theridecomforttestsareconductedonabuswithastudyfocusedontheapplicabilitydiscrepancybetweendifferentalgorithmsinridecomfortanalysis．ByapplyingParsevaltheorem，bothtimean

5、dfrequencydomainalgorithmsareimplementedwithFAMOSandVC&MATLABsoftwaredevelopmentplat—forms．Theresultsshowthattheoutcomesofcalculationwithdifferentalgorithmsdon’thavesignificantdifferences，buteachalgorithmhasitsowndistinguishingfeature．Thetimedomainalgorithmismoresensitivetopeakfactorandc

6、anbeusedtoevaluatetheridecomfortofvehiclefromtheperspectiveofhumanbodycomfort，whilethefrequencydomainalgorithmissuitableforanalyzingtheinfluenceofeachfrequencyofone—thirdoctavebandonhumanbodyvibrationandprovidingbasesforridecomfortimprovement，butwiththedefectsinloweraccuracyandprocessing

7、efficiency．Andinfrequencydomain，theresultsofcomparisonbetweentwospectrumestimationschemesindicatethattheWelchclassicspectrumestimationtechniquehaspoorconsistencywhiletheYule—WalkermethodusingARmodelhasrelativelystableperformance．Keywords：vehicle；ridecomfort；timedomainmeth