多缸柴油机故障诊断的灰色优劣关联度法

采集多缸柴油机工作过程的振动信号和缸压信号，建立各缸故障特生矢量和特征量化矢量，选择最优与最劣参数量化矢量，然后进行最优与最劣关联度计算。由灰色优关联度评价及缸工况；由灰色劣关联度诊断各缸故障，参照相应故障特征矢量确立策略。

Method of Grey Excellent and Inferior Correlation Degree on Fault Diagnosis in Multicylinder Diesel Engine

By gathering a period of signal of vibration and combustion pressure on the multicylinder diesel engine's operating process, We can set up the FaultCharacter Vector and the Character Equivalence Vector, then choose the Excellence Parameter Equivalence Vector and the Inferio Parameter Equivalence Vector and calculate the Grey Excellence Correlation Degree and the Grey Inferio Correlation Degree. According to the method, we evaluate each cylinder's behavior and diagnose each cylinder's fault. At last, we can determine the repairing items.