The establishment of fault feature vector is a precondition to fault diagnosis.

电机故障特征相量的确立是进行故障诊断的前提。

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The actual diagnosis result shows that the fault diagnosis is effective by using the fault signal feature vector and fault table and similarity theory.

结果表明：利用故障信号的特征向量与故障特征表，通过相似性原理进行故障诊断是有效的。

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