Diesel engine fault diagnosis method based on vibration analysis
A technology of fault diagnosis and vibration analysis, applied in the direction of internal combustion engine testing, etc., can solve problems such as over-envelope, unable to give probabilistic output, and unexplainable end effect.
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[0033] A vibration analysis-based diesel engine fault diagnosis method of the present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.
[0034] A kind of diesel engine fault diagnosis method based on vibration analysis of the present invention, comprises the steps:
[0035] (1) Utilize the vibration acceleration sensor to collect the vibration signal of the diesel engine under normal conditions and fault conditions;
[0036] (2) Intrinsic time scale decomposition is a new non-stationary signal analysis method, which can adaptively decompose complex signals into the sum of several intrinsic time scale components and residual signals. In the analysis of brain wave signals, successfully applied. However, when it is used to deal with complex vibration signals, the problem of extreme point processing at the endpoint of the algorithm and the problem of low linear interpolation accuracy often cause large errors between th...
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