Ford-NVH第六章

1.6ComponentNoise/SQ结构躁声/声音质量VehicleNVHAwarenessT.Champagne,K.Vandenbrink1Background背景●PresentationMaterialsoriginallyCompiledinFeb.’96forthe●介绍由Johnpenfold在TonyChampagne的帮助下为DEW98ComponentSoundQualityAwarenessSeminarDEW98结构声音质量觉察的研讨会在1996年2月最初编辑byJohnPenfoldWithAssistancefromtonyChampagne的原材料VehicleNVHAwareness1.6ComponentNoise/SQ2Objectives目标●Describepreferenceandannoyancefactorsofcomponentsounds●描述结构音令人喜欢和讨厌的因素●PresentobjectivemeasurestocharacterizesoundsforSDSs,benchmarking,●为系统设计的具体要求、基准设定、部件评估提出用客观的量度来hardwareassessment辨别声音的特征●Useelectro-mechanicalcomponentsoundqualityexamplestoillustratecorrelationanalysis●用机电结构的声音质量例子来说明相关分析●Recommendpracticesforimprovingcomponentsoundquality●为提高结构声音质量推荐采用的准则VehicleNVHAwareness1.6ComponentNoise/SQ3Outline概要●Soundqualityprocess(continued)●声音质量程序（继续的）-presentobjectivemeasures-介绍目标测量方法-Correlatesubjectivetoobjectivemeasures-使主观事物与目标测量方法有关●Practicesforimprovingcomponentsoundquality●提高结构声音质量的实践VehicleNVHAwareness1.6ComponentNoise/SQ4HoodClosingWaterfallsVehicleNVHAwareness1.6ComponentNoise/SQ5ObjectiveMeasures目标测量●peakloudness●响度峰值●Loudnesschange,bounce●响度变化，回弹●5sonetime●5宋时间●Loudnessmonotonicity●响度的单一性●Peaksharpness,sharpnesstime●最大尖锐度，（最大尖锐度）对应的时间●Ringing●响铃●Motorspeeddip●发动机速度倾角VehicleNVHAwareness1.6ComponentNoise/SQ6PeakLoudness&LoudnessChange最大响度与响度变化量VehicleNVHAwareness1.6ComponentNoise/SQ7手套箱开门声响度最大响度手套箱门在行程终点碰撞最大响度变化量手套箱插销拔出时间（秒）响度（宋GD）HoodReleasingBounceExample机罩放下时碰撞声的例子VehicleNVHAwareness1.6ComponentNoise/SQ8机罩放下时碰撞声的例子—93辆载重300吨的道奇汽车作实验，在驾驶座上，用1250赫兹的高通滤波器过滤所记录下来的声音仅考虑响度增量在此两宋参考线以上的响度响度增量响度（宋）时间（秒）5SoneTime5宋时间VehicleNVHAwareness1.6ComponentNoise/SQ9响度（宋GD）最大响度5宋时间5宋界线时间（秒）Monotonicity单一性●ComparisonofNVHTPVTownCardoorclosingsounds●城镇汽车关门声的NVHTPV的比较VehicleNVHAwareness1.6ComponentNoise/SQ10High&lowSharpnessDemonstration高低尖锐度的例证●Equalloudness●相同的响度VehicleNVHAwareness1.6ComponentNoise/SQ11High&lowsharpnessDemonstration高低尖锐度的例证●Differentsharpness●不同的尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ12RingingExample铃声的例子VehicleNVHAwareness1.6ComponentNoise/SQ13SpectrogramofPowerWindowwithLargeMotorSpeedDip发动机转速大倾角时能量窗声谱图VehicleNVHAwareness1.6ComponentNoise/SQ14PowerWindowwithLargeMotorSpeedDip发动机速度大倾角时的能量窗VehicleNVHAwareness1.6ComponentNoise/SQ15发动机转速平均值的%SpectrogramofPowerwindowwithSmallMotorSpeedDip发动机转速小倾角时能量窗的声谱图VehicleNVHAwareness1.6ComponentNoise/SQ16PowerwindowwithSmallMotorSpeedDip发动机转速小倾角时的能量窗VehicleNVHAwareness1.6ComponentNoise/SQ17SubjectivetoObjectiveCorrelationexamples主观与目标的相关性例子●Powerwindow●能量窗●Door●门●Warningchimes●警铃声VehicleNVHAwareness1.6ComponentNoise/SQ18PowerwindowObjectiveMeasures能量窗的目标测量●Speeddip●速度倾角●Bandpassedloudness●带通响度VehicleNVHAwareness1.6ComponentNoise/SQ19PowerWindowsDown能量窗如下tuVehicleNVHAwareness1.6ComponentNoise/SQ20PowerwindowFluctuating能量窗浮动VehicleNVHAwareness1.6ComponentNoise/SQ21PowerWindowsWhine能量窗VehicleNVHAwareness1.6ComponentNoise/SQ22CorrelationExample:PowerWindowSpeedDip相关实例：能量速度倾角tuVehicleNVHAwareness1.6ComponentNoise/SQ23能量窗如下：特征值对发动机速度倾角发动机速度倾角特征值PowerWindowBandpassedLoudness能量带通响度VehicleNVHAwareness1.6ComponentNoise/SQ24下图为能量带通响度最糟的最好的PowerWindowRegressionEquation能量衰减方程●Merit=3.948-.464●BandpassedLoudness-.071●●能量值=3.98-.464●带通响度-.071●速度倾角，SpeedDip,R2=.83,p=[.089.00]R2=.83，P=[.89.00]VehicleNVHAwareness1.6ComponentNoise/SQ25DoorClosingObjectiveMeasures关门声的目标测量●Peakloudness●最大响度●Peaksharpness●最大尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ26DoorClosingSubjectiveResults关门声的主观结果VehicleNVHAwareness1.6ComponentNoise/SQ27最少选用的最多选用的特征值95辆汽车关门声音质量的测量结果（车外）DoorClosingPeakLoudness关门声的最大响度VehicleNVHAwareness1.6ComponentNoise/SQ28响度（宋）关门声的特征值对照最大响度（车外）特征值DoorClosingPeakSharpness关门声的最大尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ29尖锐度（acum）关门声特征值对照最大尖锐度（车外）特征值DoorOpeningObjectiveMeasures开门声的目标测量●Peakloudness●最大响度●Peaksharpness●最大尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ30DoorOpeningsubjectiveresults开门声的主观结果VehicleNVHAwareness1.6ComponentNoise/SQ3195辆汽车开门声音质量的测量结果（车外）最多选用的最少选用的特征值DoorOpeningpeakLoudness关门声的最大响度VehicleNVHAwareness1.6ComponentNoise/SQ32响度（宋）特征值最少选用的最多选用的开门声特征值对照最大响度（车外）DoorOpeningPeakSharpness开门声的最大尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ33开门声对照最大尖锐度（车外）WarningChimeObjectiveMeasures警铃声的目标测量●pulserepetitiontime●脉冲周期●Fundamentalfrequency●基频●Peaksharpness●最大尖锐度VehicleNVHAwareness1.6ComponentNoise/SQ34WarningChimePreference警铃声优选对照图Subjectivepreference-meritValuesofWarningChimes主观最优选择-警铃特征值VehicleNVHAwareness1.6ComponentNoise/SQ35WarningChimeRepetitiontime警铃声周期VehicleNVHAwareness1.6ComponentNoise/SQ36脉冲周期=1.29时间领域信号时间（秒）PulseRepTimeandPreference脉冲周期和最优选择图VehicleNVHAwareness1.6ComponentNoise/SQ37脉冲周期对警铃声质量的影响脉冲周期（秒）特征值WarningChimePeakSharpness警铃声的最大尖锐度TheeffectofpeakSharpnessonWarningChimesSoundQuality峰频对警铃声的影响VehicleNVHAwareness1.6ComponentNoise/SQ38最大尖锐度（acum）特征值WarningChimeFundamentialFrequency警铃声的基础频率FFtofCamryIgnitionWarningChimes,theHighestRatedWarningChimeintheStudyVehicleNVHAwareness1.6ComponentNoise/SQ39WarningChimeFundamentalFrequency警铃声的基础频率TheEffectofFundamentalFrequencyOnWarningChimeSoundQuality基频对警铃声质量的影响VehicleNVHAwarenes