Application of Adaptive Filter Technology Based on Wavelet Transform in Integrated Navigation System

According to the characteristic of nonlinear time-varying in integrated navigation system on-line calibration’s error model,wavelet transform was used to filter,and adaptive filter was used in on-line calibration.The flaw of the requirement of exact error model in conventional Kalman filter is overcome using this method.The simulation results show that when the model of system or measurement isn’t exact,this method has high convergence speed and it’s precision is similar to that of conventional Kalman filter.