kok电子竞技

1、1.1 NVH Overview NVH 概论Ford Motor Company Vehicle Attributes Engineering福特汽车公司整车设计部门Vehicle NVH AwarenessJ.Juan/M.Haffey1.What is NVH?什么是NVH呢？Noise-what the customer hears 噪声- 指的是顾客所能听到的声音 Sound mainly in the 20HZ10000HZ frequency range.声音的频率大体上在20赫兹到10000赫兹之间。 Characterized by frequency,level and q

2、uality.经过频率、级别和音质来描画。Vibration-What the customer fells and sees. 振动-指的是顾客所觉得到的和看到的。 Motion sensed by the body mainly in the 0.5HZ50HZ frequency range.身体所能感知运动的频率范围通常在0.5赫兹到50赫兹之间。 Characterized by frequency,level and direction.经过频率、振幅和方向来描画。Harshness-Combined effects of noise and vibration 不温馨性-指的是噪

3、声和振动的综合影响。 Rough,grating or discordant sensations.粗野的，刺耳的或不调和的觉得。Vehicle NVH Awareness1.1 NVH Overview2.NVH must fulfill legal requirements. NVH必需满足法定的要求。NVH should provide the acoustical/tactile feedback for safe and confident driving. NVH应该使乘员在驾驶方面有平安和自信的觉得。 Link to operating conditions. 在各种操作环境。

4、Connection to earth. 在各种路面。NVH should avoid any negative perception. NVH应该防止任何不好的觉得。 unpleasant ,unrefined ,unexpected ,and annoying events. 令人不愉快的，粗鄙的，预料之外的和令人厌恶的事情。NVH can exceed customer expectations. NVH应该能超越顾客的期望值。Vehicle NVH Awareness1.1 NVH Overview3NVH ObjectivesNVH的目的.NVH link to customer s

5、atisfactionNVH反映了消费者称心的程度TGRPress review(examples) TGR媒体评论例如 “Fiesta has a surprisingly quiet & well refined engine “ Fiesta有一台令人诧异的安静而且温馨的发动机 “F150 ride is smooth quiet with the 4.6 L “F150乘坐温馨安静的4.6升发动机汽车TGRThings Gone Wrong 20%30% of TGW is NVH related. TGR所埋怨的事情 20%30%埋怨的产生都是与NVH有关系的。Vehicle NVH

6、 Awareness1.1 NVH Overview4.Vehicle NVH Awareness1.1 NVH Overview5NVH Links to Company ProfitNVH关系着公司的利益1529% of warranty cost has noise as a condition code. 1529%的保修的费用是破费在与噪声有关的。1994 model year,36MIS,warranty cost associated with all noise was $346 million 18% of total warranty. 94年型车，3年的在用车，在噪声方面

7、的保修费用 是3.46亿美圆占总费用的18%。.Vehicle NVH Awareness1.1 NVH Overview6NVH Links to Company Profit NVH关系着公司的利益NVH Prototype cost reduction opportunity. COMBINED COST BREAKDOWN PROTOTYPE COST CONTRIBUTION 综合本钱明细 样机破费的组成 (TASE+SAFETY+NVH) TASE+平安设备+NVHTotal Cost=$303M (Base on TASE,Safety,NVH Cost of Attribute

8、 Studies总支出=3.03亿美圆 基于TASE，平安，NVH的研讨费用.Vehicle NVH Awareness1.1 NVH Overview7Sound Generation Mechanism产生噪声的原理Multiple mechanisms generate a variability of vehicle sound. 汽车所产生噪声的原理是多种多样的。Combustion Airflow,pumping熄灭 气流，进排气Impacts between components Airflow,turbulences零件之间的撞击 气流，(液体或气体的)紊乱Friction c

9、ontact of components Surface roughness构件之间的摩擦 粗糙的外表Rotating parts Unbalance masses 旋转的部件 不平衡块Flow in pipes Tire force variation在管中的流动 轮胎压力的变化.Vehicle NVH Awareness1.1 NVH Overview8Vehicle Sounds汽车的噪声Combustion noise wind noise Gear rattle Bearing knock熄灭的噪声 风的噪声 齿轮传动的声音 轴承的敲击声Diesel knocking Sunroof

10、 noise Gear whine Electric windows柴油机的敲击声 遮阳顶棚的噪声 齿轮的声音 电动窗的噪声Valve train Door slam Gear lever tizz Tire noise 气阀机构的噪声 门的砰的声音 变速杆换档的噪声 轮胎的噪声FEAD noise Central locking Driveline clonk Exhaust noise FEAD噪声 中央门锁的噪声 动力传动系统的噪声 排气噪声PAS noise Switch noise Driveline thrash Squeaks and rattles动力转向系统的声音 开关的噪声

11、 动力传动系统的噪声 吱吱声和喀嚓声Fuel pump noise Indicator ticking Road noise Water splash noise 燃油泵的噪声 指示器的滴答声 道路的噪声 水溅的噪声Alternator whine Windscreen wipe noise Impact harshness Intake noise 交流发电机的噪声 挡风玻璃的噪声 撞击振动声 通风口的噪声.Vehicle NVH Awareness1.1 NVH Overview9NVH PhenomenaNVH景象OPERATING CONDITION操作环境DESCRIPTION描画S

12、OURCE 资源Pass-ByDecelerationCruiseAccelerationIdleStaring Boom Rumble Growl Whine Rattle SquealHissEngine Transmission Exhaust/intake Road Wind Tire.Vehicle NVH Awareness1.1 NVH Overview10Vehicle Noise Examples 汽车的噪声举例Wind Noise(80 mph HST)-1/12th Octave Spectrum. 风的噪声80英里每小时的高速实验1/12倍频程分贝频率.Vehicle

13、NVH Awareness1.1 NVH Overview11Vehicle Noise Examples汽车噪声举例Road Noise(40mph Rough Rd.)-Narrow Spectrum. 道路噪声40英里每小时在粗糙路面之上-窄频。.Vehicle NVH Awareness1.1 NVH Overview12Vehicle Noise Examples汽车噪声举例Power Noise(WOT)-Loudness&speech Intelligibility. 动力系统噪声WOT-响度以及说话的明晰度.Vehicle NVH Awareness1.1 NVH Overvi

14、ew13Subjective Impression客观感受Created by the brain based on: 建立在头脑觉得的根底之上：database,data analysis “This sounds like an engine 资料库，数据分析 “这种噪声好像一台发动机experience “I have head a variety of engines 阅历 “我听到了发动机的声音bias “has never built good engines 偏见 “从来没有消费过好的发动机 Company uses VERS to produce consistent rati

15、ngs. 公司用定额目的的方法消费产品。Engineering Rating Index工程额定指标Evaluation of attribute Performance品质性能评价Customer Satisfaction(for this attribute)消费者的满意度（对于品质方面）Improvement Desired by渴望得到改进的人3Not acceptable 不能接受的Very Dissatisfied很不满意All Customers所有的消费者6acceptable 可以接受的Fairly Well Satisfied还算感到满意Critical Customers

16、爱挑剔的顾客 10Excellent优秀Completely Satisfied完全满意Not Perceptible很少的顾客.Vehicle NVH Awareness1.1 NVH Overview14Subjective/Objective Correlation客观与客观的相互关系Objective measure is required for target setting/cascading. 客观的方法需求满足目的的设置和层次。.Vehicle NVH Awareness1.1 NVH Overview15Road NVH Target Cascade道路NVH目的层次Road

17、 NVH(1)Body Acoustic &Vibration sensitivities(4)Airborne Noise(3)Structure borne NVH(2)Suspension ForceInput in Body(5)Point Mobiles(8)Body Modes(9)Body Structure(10)Panel Damping &Noise Isolation(11)Seat VibrationTransmissibility(12)Seat modes(13)Sleeping columnVIB Sensitivity (14)Power train modes

18、(15)Body/Frame/Sub frame Force Transmissibility(16)Suspension ForceTransmissibility(19)Body/Frame/Sub frame Mounts(17)Frame/Sub frame Modes(18)Suspension Mounts(20)Suspension Friction/sticktion(21)Shock Damping(22)Suspension Geometry(23)Road/Tire Contact force(26)Tire Properties(27)Tire Pressure(28)

19、Tire Size/Aspect Ratio(29)Tire Modes(30)Wheel Modes(31)Strut Modes(30)Imbalance Force(32)Sound PackageNoise Reduction(6)Tire Radiated Noise(7)Barrier Transmission Loss(33)Absorption(42)Carpet(43)Seat Material(44)Headliner(45)Wheelhouse(38)Floor(39)Side Panel(40)Glass(41)Lockage(34)Area ofHoles(pass-

20、Through)(35)Wheel Modes(36).Vehicle NVH Awareness1.1 NVH Overview16Road NVH Design Guidelines道路NVH设计指点Reduce body noise transfer functions(0.01Pa/N) 减少车身传送的噪声( 0.01Pa/N )。Design interior cavity nodal point at passengers head position. 在乘客头的位置设计通风口。Reduce suspension force input to body. 减少输入车体的中止力量。I

21、ncrease seat isolation above 6 Hz(transmissibility0.5mm/s/N). 增大座椅在 6 赫兹以上的隔绝.(能传送5:1). 添加车身附件刚性/衬套刚性比(5:1)。Assure good modal separation. 保证好的模态分别。 -separate major body modes and acoustic cavities. 分别主要的车体模态和有声音的。 -separate body modes from suspension modes. 分别车体方式中的悬挂部分。 -separate wheel modes from t

22、ire modes. 把车轮和车胎别分开来。Reduce tire/wheel unbalance and tire radiated noise. 减少车胎/轮不平衡性和车胎的辐射噪声。.Vehicle NVH Awareness1.1 NVH Overview17Vehicle Attributes Compatibility车辆的兼容特性.Vehicle NVH Awareness1.1 NVH Overview18Course Expected Outcomes课程预期的结果Understanding and appreciation of each major systems inf

23、luence on NVH. 了解和正确评价各个主要系统对NVH的影响。Understanding of design concept and guidelines for NVH and their trade- offs with other vehicle attributes. 了解NVH的设计观念和指点方法以及其和车辆其它属性的协调。Understanding of engineering best practices and appropriate NVH tools/methods. 了解工程中最好的常用的和适当的NVH设备/方法。Recognizing company expe

24、cts and contact person for future assistance. 了解公司的期望和认识以后有协助的人。.Vehicle NVH Awareness1.1 NVH Overview19NVH DepartmentsNVH部门 Department 部门Manager管理人员Profs教授Vehicle NVH 车辆NVHTom LahvicTLAHVICSystem NVH 系统NVHRon QuagliaRQUAGLIAVehicle NVH Europe 车辆欧洲NVHKarl-Heinz BurgerKBUERGERP/T NVH&CAE P/T NVH&计算机辅

25、助教学 Mike RaoMRAOSqueak & Rattle Gary BoesGBOESCAE NVH 计算机辅助教学NVHMike HaffeyMHAFFEYACD，CC Subsystem ACD ， CC 子系统John BuschJBUSCHACD，CC Technology ACD ， CC工艺John BarkleyJBARKLEY.Vehicle NVH Awareness1.1 NVH Overview20Course Outlines课程概要Day1 第一天 -Introduction to NVH,Basic NVH Concepts,DOE. 引见NVH，初步了解NV

26、H的概念，能源部。 -Sound Quality Engineering. 噪声质量工程。 -R202,Target Setting Strategies. R202,设定目的战略。Day2 第二天 -P/T NVH. -P/T systems NVH.Engine,Accessory NVH. 发动机，附加件NVH。Axle,Gear Noise,Rattle,Clunk. 车轴，齿轮传动噪声，嘎嘎声和沉闷的金属声。Induction Noise. 进气噪声。.Vehicle NVH Awareness1.1 NVH Overview21Course Outlines(Contd课程概要(续)Day3 第三天 -Road NVH. -道路VNH。 -Chassis NVH,Brake Roughness. -底盘NVH,制动粗暴。 -Squeak & Rattle. -尖叫声和卡吱声。Day4 -Vehicle Drive/Demonstration. 第四天 -车辆驾驶/示范。Day5 第五天 -Body NVH -车身NVH -Wind Noise -风的噪声.