福特汽车公司nvh（噪声）知识培训教材.ppt

NVH Overview NVH 概论
Ford pany Vehicle Attributes Engineering
福特汽车公司整车设计部门
Vehicle NVH Awareness

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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 20HZ~10000HZ 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 quality.
—通过频率、级别和音质来描述。
Vibration-What the customer fells and sees.
振动-指的是顾客所感觉到的和看到的。
— Motion sensed by the body mainly in the ~50HZ frequency range.
—。
— Characterized by frequency,level and direction.
—通过频率、振幅和方向来描述。
bined effects of noise and vibration
不舒适性-指的是噪声和振动的综合影响。
— Rough,grating or discordant sensations.
—粗野的,刺耳的或不和谐的感觉。
Vehicle NVH Awareness
NVH Overview
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NVH must fulfill legal requirements.
NVH必须满足法定的要求。
NVH should provide the acoustical/tactile feedback for safe and confident driving.
NVH应该使乘员在驾驶方面有安全和自信的感觉。
—Link to operating conditions.
—在各种操作环境。
—Connection to earth.
—在各种路面。
NVH should avoid any negative perception.
NVH应该避免任何不好的感觉。
—unpleasant ,unrefined ,unexpected ,and annoying events.
—令人不愉快的,粗俗的,意料之外的和令人讨厌的事情。
NVH can exceed customer expectations.
NVH应该能超过顾客的期望值。
Vehicle NVH Awareness
NVH Overview
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NVH ObjectivesNVH的目标
NVH link to customer satisfactionNVH反映了消费者满意的程度
TGR—Press review(examples)
TGR—媒体评论(例如)
“…Fiesta has a surprisingly quiet & well refined engine”
“… Fiesta有一台令人惊讶的安静而且舒适的发动机”
“…[F150] ride is smooth quiet with the L”
“…[F150]”
TGR—Things Gone Wrong
20%~30% of TGW is NVH related.
TGR—所抱怨的事情
20%~30%抱怨的产生都是与NVH有关系的。
Vehicle NVH Awareness
NVH Overview
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Vehicle NVH Awareness
NVH Overview
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NVH Links pany ProfitNVH关系着公司的利益
15~29% of warranty cost has noise as a condition code.
15~29%的保修的费用是花费在与噪声有关的。
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,在噪声方面的保修费用
—占总费用的18%。
Vehicle NVH Awareness
NVH Overview
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NVH Links pany Profit