Aiming at problem of fault detection of navigation components of multi-sensors redundant configuration

generalized likelihood ratio test（GLRT） is an effective fault detection method.However

as its extraction on feature vector is not so accurate

false alarm and missing often occur in fault diagnosis

and with accumulation of sampling time

sensitivity of the parity vector of sample to fault becomes weak.Aiming at fivesensor configuration system

use moving window-GLRT（MW-GLRT） method

combine with information contribution rate method to overcome the shortcoming of GLRT method.Step fault and slope fault are used

and simulation verification is carried out.The simulation results show that the detection performance is greatly improved by using this method.