Noise Reduction on Beam Modes Using Extreme Envelope Average

2012-36-0633

11/25/2012

Event
SAE Brasil International Noise and Vibration Colloquium 2012
Authors Abstract
Content
The smoothing method called extreme envelope average (EEA) was recently proposed to smooth one-dimensional signals. Its basic principle is based on the central tendency of successive averages between extreme envelopes, maximum and minimum, after a specific number of steps of an iterative process. Energy levels are lost after each iteration and the most important signal structures (low-frequency components) are preserved. There are no restrictions on the linearity and harmonic content, making it a useful tool for signals which present abrupt changes (such as sharp edges) along their curvatures. Its efficiency is highly related to the identification process of local maximums/ minimums and the interpolation process. In this work, the more robust version of EEA called robust extreme envelope average REEA is used to reduce noise of beam mode shapes from numerical modal analysis. The used modes were numerically corrupted by White Gaussian noise before applying the smoothing technique.
Meta TagsDetails
DOI
https://doi.org/10.4271/2012-36-0633
Pages
6
Citation
Batista, F., and Silveira, M., "Noise Reduction on Beam Modes Using Extreme Envelope Average," SAE Technical Paper 2012-36-0633, 2012, https://doi.org/10.4271/2012-36-0633.
Additional Details
Publisher
Published
Nov 25, 2012
Product Code
2012-36-0633
Content Type
Technical Paper
Language
English