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Session Overview
Session
Keynote 4: Jian Pang
Time:
Tuesday, 29/Aug/2017:
15:40 - 16:40

Session Chair: TOM HO
Location: Convention Hall A & B
Convention Hall A & B, Level 1, HKCEC
Trend of Automobile Development and Its Challenge for Noise and Vibration Control

Session Abstract

The report introduces the trend of automotive technology development including innovation of traditional engine, clean energy system, lightweight, artificial intelligence, environment, etc., and its impacts on vehicle noise and vibration control. The efficiency of the traditional engine has been significantly improved by engine displacement downsizing, VCM (Variable Cylinder Management), turbocharger, GDI (gasoline direct injection), VIS (variable intake system), and so on. The innovation of the engine technologies increases the engine efficiency, but also raises its vibration and sound radiation levels, which worsens the noise and vibration transmitted to the vehicle body. The clean energy includes hybrid power, electrical power and fuel cell power. The sound and vibration characteristics of the new energy systems are different from that of the traditional engine. Due to lack of the engine noise, the wind noise and road noise become the dominate noise sources for electric vehicles, and high frequency noise generated by the driving motor is a new and typical noise source, which drastically changes the vehicle sound quality characteristics. The application of artificial intelligence and ADAS (Advanced Driver Assistance Systems) changes the passenger compartment into an entertainment space. The passengers seated on different seats require their own ””private”” space, which suggests that the sound walls should be built in order to separate the interior space into several sound-independent areas. Many customers prefer powerful sound in order to realize their desired driving fun when accelerating the vehicles, and the legislations require the ””quite”” vehicles to generate warning sounds to the pedestrians, which requests the sound generating systems for the clean energy vehicles. The structural sound and vibration characteristics are depended on its weight, stiffness, damping, etc., so the lightweight trend raises big challenge for the vehicle NVH control. Based on the analysis of the trends and challenges, the report also provides some solutions and opportunities for the NVH control development.




 
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Conference: INTER-NOISE 2017
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