提出了一种基于集团法和自组织神经网络的容差电路故障诊断方法。按照给定的撕裂原则将大规模电子电路撕裂成子电路后,运用集团法诊断出含有故障的子电路,并将它们的测量数据输入到自组织神经网络,神经网络的输出就是故障元件。文章详述了故障诊断的原理和步骤,并引实例结果论证其诊断方法。 A tolerance circuit fault diagnosis method based on group method and self-organizing neural network is proposed. After tearing large electronic circuits into sub-circuits according to a given tearing principle, the group method is used to diagnose sub-circuits containing the faults and their measured data are input into a self-organizing neural network. The output of the neural network is the faulty component. The article detailed the principle and steps of fault diagnosis, and cited examples of results to demonstrate its diagnostic method.