Abstract: Aiming at the low fault recognition rate and large error loss of traditional SDAE algorithm, an improved algorithm is proposed. Data quantification and fault code matching are introduced in order to reduce the input/output error loss and raise the fault recognition accuracy. Results show that the reconstruction error of the improved SDAE algorithm is decreased by 1.5% on average, and the fault recognition rate is increased by 9% on average, the fault recognition accuracy of complex system has been improved.

Key words: complex system, fault code matching, data quantization, fault identification, accuracy analysis