In today's automotive industry, NVH (Noise, Vibration, and Harshness) has become a critical comprehensive metric for evaluating vehicle manufacturing quality. It not only impacts driving comfort but also directly influences consumer purchasing decisions. With technological advancements and rising expectations for in-cabin experiences, NVH research and control have emerged as a key focus for automakers and component suppliers.
NVH: A Universal Concern
While NVH may sound like a technical term, it profoundly affects every driver and passenger.
- Noise: Unwanted sounds inside the vehicle, such as road rumble, mechanical noises, or wind turbulence.
- Vibration: Physical sensations transmitted through the steering wheel, chassis, or seats.
- Harshness: Perceived discomfort from combined noise and vibration, often described as "raspy" or "jarring" sensations.
Together, these factors significantly shape the overall driving and riding experience.
NVH Challenges in Traditional vs. New Energy Vehicles
In conventional internal combustion engine (ICE) vehicles, the engine is the primary source of noise and vibration. Through optimized engine design, improved suspension systems, and advanced soundproofing materials, automakers have effectively mitigated these issues. However, the rise of new energy vehicles (NEVs), particularly hydrogen fuel cell vehicles (FCVs), has introduced novel NVH characteristics.
Hydrogen FCVs rely on a powertrain composed of fuel cell stacks, air compressors, and electric motors, each generating distinct noise and vibration profiles. For instance:
- Air compressors produce high-frequency aerodynamic noise during high-speed operation.
Electric motors, though inherently quieter, may induce vibrations and noise due to mismatches with transmissions or drivetrains.
Additionally, NEV exhaust systems differ from traditional setups. With no engine-order noise, flow-induced noise dominates the exhaust system, demanding more precise design to ensure effective noise control.
GRGTEST's Integrated NVH Solutions
GRGTEST has established a one-stop technical service ecosystem centered on NVH, integrating testing, consultation & optimization, R&D, and intelligent unmanned testing equipment development. Its capabilities include:
- Full-spectrum vibration and noise testing.
- Customized NVH troubleshooting and improvement strategies.
- Foundational research on NVH mechanisms.
- Forward development of NVH solutions.
By bridging cutting-edge technology and industry needs, GRGTEST empowers automakers to tackle evolving NVH challenges and deliver superior driving experiences.