Sensor Fault Detection and Separation Method of Monitoring System in Mine Pressurized Fan

In order to solve the key sensor fault detection and separation problems of the mine pressurized fan monitoring and control system, a sensor fault diagn osis method based on the main element analysis model was provided.The main element analysis model was established with the several sensors highly related in the id entification system of the diagnosis method.According to the established model, the square prediction error was applied to judge any sensors with fault in the system.Th e contribution plot of the square prediction error was applied to position the fault sensor.The system had the step deviation fault test and the drift fault test and the resul ts showed that the main element analysis method could be applied to the sensor fault detection and separation of the monitoring and control system for the mine pressu rized fan and could provide the powerful protection to the normal operation of the mine pressurized fan system.