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    Blind Separation of Internal Combustion Engine Vibration Signals by a Deflation

    Access Status
    Fulltext not available
    Authors
    Liu, Xianhua
    Randall, R.
    Antoni, J.
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Liu, Xianhua and Randall, Robert B. and Antoni, Jerome. 2008. Blind Separation of Internal Combustion Engine Vibration Signals by a Deflation Method. Mechanical Systems and Signal Processing. 22 (5): pp. 1082-1091.
    Source Title
    Mechanical Systems and Signal Processing
    DOI
    10.1016/j.ymssp.2007.11.011
    ISSN
    08883270
    URI
    http://hdl.handle.net/20.500.11937/47747
    Collection
    • Curtin Research Publications
    Abstract

    Internal combustion engines have several vibration sources, such as combustion, fuel injection, piston slap and valve operation. It is necessary to separate the different vibration sources and then analyze each of them individually. This paper attempts to separate the vibration sources by blind source separation techniques and proposes a combination of the Blind Least Mean Square algorithm with a deflation method to separate several sources. The combined methods are first verified on simulated sources and then applied to engine signals. Separation results show that cylinder pressure consists of two sources—one is a smooth low frequency part due to compression and expansion caused by piston movement; the other is the high frequency part due to combustion.

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