Research on Sensor Fault Diagnosis of the Air-Conditioning

A wavelet neural network(WNN) fault diagnosis strategy is proposed based on the air-conditioning unit in the common sensor faults.Sensor fault diagnosis system is based on the analysis of the primary failure of air-conditioning unit sensors.By comparing residuals of the sensor's actual measuring data and forecast data,it verifies the ability of fault diagnosis based on WNN.Besides,the residuals ratio in fault diagnosis base on the WNN and BP neural network is analyzed.Simulation shows that the fault diagnosis system based on the WNN has the advantages of simple structure,fast convergence rate,accurate diagnosis,and higher precision.