Browse Publications Technical Papers 2002-01-0453
2002-03-04

Application of Time-Frequency Representation Techniques to the Impact-Induced Noise and Vibration from Engines 2002-01-0453

Either for diagnostics purposes or NVH improvement efforts in vehicle development, it will be necessary to have both timing and spectral contents information from measured sound or vibration data. It will become especially important when the sound or vibration is induced from the impact mechanism in automotive engines, such as valve train, piston, or fuel injector etc.
In this study, we will review several approaches of time-frequency representation, like Wavelet Transform, Wigner-Ville Distribution and Short-Time Fourier Transform, with their properties in view of application to practical development engineering.
These techniques have been applied to practical development examples in order to identify the characteristics of the impact-induced sound and vibration [1, 9]. From the valve train noise study, it was possible to separate valve seating noise at the time of valve closing, and valve opening noise during valve opening period.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Shipboard Vibration and Noise Considerations in the Design of River Towboats

640024

View Details

TECHNICAL PAPER

Achieving a Vehicle Level Sound Quality Target by a Cascade to System Level Noise and Vibration Targets

2005-01-2394

View Details

TECHNICAL PAPER

Rattle Noise Measurement of a Plate-Beam System

1999-01-1724

View Details

X