We propose a method based on wavelet transform for the investigation of disc brake squeal and characterization of contact forces between disc and pad. It is shown experimentally that friction coefficient is time dependent and can be considered as a combination of a deterministic component superimposed by a random one. Discrete wavelet transform (DWT) is applied to decompose, filter, and separate deterministic and random frequency components in time domain. Parameters such as power spectral density and probability density function of the random components are determined. Wavelet modulus and wavelet ridge are used to investigate the spectral properties of the pad acceleration and contact forces. Instantaneous frequencies components and correlations with modal characteristics of the disc and pad are identified.


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    Title :

    Disc Brake Squeal Investigation and Friction Characterization Using Wavelet Transform


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 World Congress & Exhibition ; 2005



    Publication date :

    2005-04-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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