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本文首先分析了几种多参数故障诊断方法的特点，进而从故障诊断的角度，分析比较了多参数故障诊断的多数样本与灰色关联度原始定义的数据样本的特点差异，提出了模糊关联度的概念；实测数据检验结果表明：模糊关联度分析比灰色关联度分析诊断准确度高，具有很好的应用前景。
In this paper, the characteristics of several multi-parameter fault diagnosis methods are analyzed first. Then from the point of view of fault diagnosis, the differences between the multi-sample fault diagnosis and the original data samples defined by gray relational degree are analyzed and compared. The results show that the fuzzy correlation analysis has higher diagnostic accuracy than gray relational analysis and has good application prospects.