运用非线性动力系统理论进行船舶柴油机故障诊断

针对柴油机表面振动非稳态与多激励性的特点,从非线性动力系统理论角度进行信号的分析与处理。运用小波模量最大值对气缸盖螺栓表面的振动信号消噪,计算气门不同状态时的多重分形维数谱,定义故障特征向量,从而识别不同的故障。结果表明,这种方法对气门故障诊断是极为有效的。

Fault Diagnosis of Marine Diesel Engine Based on Theory of Non-Liner Dynamic System

Concerning with the characteristic of marine diesel engine surface that its vibration signals are non-steady andabound of vibration exciter, the signals are analyzed and processed based on the theory of non-liner dynamic system. Themaximum wavelet module quantum is used to reduce the noise of vibration signal from surface of cylinder heads bolt. Thenthe multi-fractal spectrum of valve under different state is calculated, the fault eigenvector is defined and accordingly differentfault can be identified. The result shows that all these methods are very effective to diagnosis the fault of compressors valve.