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Proceedings Paper

Holographic interferometry and its application in brake vibration and noise analysis
Author(s): Mitchell M. Marchi; Fang Chen; Pat Harwood; R. Linder; Gordon M. Brown
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Paper Abstract

Brake roughness and brake squeal are important issues/concems of customer satisfaction in the automotive industry. Brake roughness is a low frequency vibration while brake squeal is a high frequency noise. Some fundamental root causes of brake roughness are rotor runout, rotor surface flat spots, etc., which cause brake torque variation that in turn produces unwanted low frequency vibration. Brake squeal is a dynamic instability and nonlinear phenomenon that occurs in a frequency range of lKHz to 15KHz, which is in the range of sensitivity for the human ear. Squeal is usually caused by excitation of brake components brought on by slip-stick of the brake caliper pad material and rotor surface during brake actuation. This paper will provide an overview of examples that illustrate the application of holographic interferometry methodology to identify the root causes of brake concerns and verify engineering solutions.

Paper Details

Date Published: 7 March 2006
PDF: 10 pages
Proc. SPIE 4101, Laser Interferometry X: Techniques and Analysis, (7 March 2006); doi: 10.1117/12.498401
Show Author Affiliations
Mitchell M. Marchi, Ford Motor Co. (United States)
Fang Chen, Ford Motor Co. (United States)
Pat Harwood, Ford Motor Co. (United States)
R. Linder, Ford Motor Co. (United States)
Gordon M. Brown, Optical Systems Engineering (United States)

Published in SPIE Proceedings Vol. 4101:
Laser Interferometry X: Techniques and Analysis
Gordon M. Brown; Malgorzata Kujawinska; Werner P. O. Jueptner; Ryszard J. Pryputniewicz; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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