Automotive NVH has been receiving considerable attention for the last 30 years. For more than 20 years a successful bi-annual conference is scheduled with more than a 1000 attendees and more than 200 publications in every meeting. In addition, an international journal is established that published refereed publications on the subject. Automotive NVH can be classified into interior and exterior NVH. Interior NVH is of great importance to automobile buyers. Exterior NVH received considerable attention because of its impact on the environment. It is the subject of legislation in various countries and is recognised to be a source of public health concerns. Interior NVH is classified into usual and unusual NVH. The main sources of usual NVH are the powertrain, whose noise are dominant in the low to medium speed ranges, the road NVH, which may dominate in the medium and high speed ranges and wind noise which can dominate in the high speed ranges. Unwanted NVH can be classified according to the root cause of the noise and/or vibration concern. Several engine, FEAD, transmission, driveline, exhaust and induction noises are reported. In addition, unwanted road and wind NVH are also reported. Other unwanted NVH can be due to the brake and suspension systems, the steering system as well as other hardware of the vehicle. The manuscript also touched on sound quality, an important dimension of NVH research. It addresses damping and methods of analysis and assessment used frequently by researchers and/or engineers. Special attention is given to designing for NVH in a product development environment. In product development, NVH engineers have to address the conflicting demands of the customer to perform proper optimisation or trade-off studies. They should seek new technologies to increase their speed of producing vehicles to remain competitive. This makes it necessary to stay at the cutting edge of technology both in NVH control and NVH assessment technologies like computer-aided engineering. Another challenge that engineers face is cascading vehicle level NVH requirements into hardware physical requirements. Also, assessment needs to be delivered early in the development process, where less information is available. This manuscript addresses the most important aspects of vehicle design that relate to NVH in early design.
Overview of automotive noise and vibration
International Journal of Vehicle Noise and Vibration ; 5 , 1/2 ; 1-35
2009
35 Seiten, 9 Bilder, 3 Tabellen, Quellen
Article (Journal)
English
Overview of automotive noise and vibration
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