Coherent noise removal from dynamic wall pressure and vibration signals

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fluid-structure interaction experiments often include measurements of the fluid excitation force (or pressure) and the resulting structural vibration. In addition to the desired information, measured dynamic pressure data can contain unwanted signals such as acoustic pressures and vibration induced pressures. Measured structural vibration data can include unwanted electrical noise and vibration energy from adjacent structures. In this paper, a noise removal technique is presented in which an unlimited number of unwanted correlated signals can be removed from a set of measured data. In its simplest form, this technique is related to the coherent output power (COP). However, unlike COP noise removal, multiple signals can be removed from measured data while retaining the magnitude and phase of the original data. These advantages often yield useful information concerning the flow field and structure under investigation. This technique is demonstrated using dynamic wall pressure and vibration measurements from a thin-walled aluminum cylinder filled with water flowing at 20 ft/sec. This technique is compared to several historical noise removal methods. The historical methods include an algorithm based on the physics of the measured pressures and an adaptive signal processing approach based on an unwanted noise reference.

Original languageEnglish (US)
Title of host publication41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Pages118-127
Number of pages10
Volume1
StatePublished - 2012
Event41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 - New York, NY, United States
Duration: Aug 19 2012Aug 22 2012

Other

Other41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
CountryUnited States
CityNew York, NY
Period8/19/128/22/12

Fingerprint

wall pressure
dynamic pressure
vibration
structural vibration
vibration measurement
output
fluids
pressure measurement
retaining
signal processing
flow distribution
aluminum
physics
acoustics
water
excitation
interactions

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics

Cite this

Bonness, W. K., & Jenkins, Jr., D. M. (2012). Coherent noise removal from dynamic wall pressure and vibration signals. In 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012 (Vol. 1, pp. 118-127)
Bonness, William Kris ; Jenkins, Jr., David Marion. / Coherent noise removal from dynamic wall pressure and vibration signals. 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012. Vol. 1 2012. pp. 118-127
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Bonness, WK & Jenkins, Jr., DM 2012, Coherent noise removal from dynamic wall pressure and vibration signals. in 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012. vol. 1, pp. 118-127, 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012, New York, NY, United States, 8/19/12.

Coherent noise removal from dynamic wall pressure and vibration signals. / Bonness, William Kris; Jenkins, Jr., David Marion.

41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012. Vol. 1 2012. p. 118-127.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Bonness WK, Jenkins, Jr. DM. Coherent noise removal from dynamic wall pressure and vibration signals. In 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012. Vol. 1. 2012. p. 118-127