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Due to the complexity of the fault mechanism and the testing method, the research on the Design for Testability (DFT) for mechanical system becomes difficult. In this paper, according to characteristics of mechanical system, it puts forward using the combination of the Bayesian Networks (BN) and the dependency matrix for testability modeling. The method gives full play to BN's probabilistic reasoning...
A method was studied to diagnose diesel misfire fault and ascertain the misfire cylinder number based on recognizing the vibration signal peak points of diesel cylinder head. Based on time-domain characteristics of waveform, seven criteria were described. The computer algorithm to identify time-domain waveform peak and locate misfire cylinder order number without top dead center signal was extracted...
This work aims at monitoring diesel engine fuel injection system by analyzing the cylinder head variations. It focuses on dual-peak phenomenon in combustion stage signal of cylinder head vibration under certain work condition. The first peak of dual-peak is the vibratory response signal of fuel injector needle valve crash which is proved by the time domain analysis between cylinder head vibration...
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