To improve the low tracking precision caused by lagged filter gain or imprecise state noise when the target highly maneuvers, a modified unscented Kalman filter algorithm based on the improved filter gain and adaptive...To improve the low tracking precision caused by lagged filter gain or imprecise state noise when the target highly maneuvers, a modified unscented Kalman filter algorithm based on the improved filter gain and adaptive scale factor of state noise is presented. In every filter process, the estimated scale factor is used to update the state noise covariance Qk, and the improved filter gain is obtained in the filter process of unscented Kalman filter (UKF) via predicted variance Pk|k-1, which is similar to the standard Kalman filter. Simulation results show that the proposed algorithm provides better accuracy and ability to adapt to the highly maneuvering target compared with the standard UKF.展开更多
In this paper,a new simplex unscented transform(UT)based Schmidt orthogonal algorithm and a new filter method based on this transform are proposed.This filter has less computation consumption than UKF(unscented Kal...In this paper,a new simplex unscented transform(UT)based Schmidt orthogonal algorithm and a new filter method based on this transform are proposed.This filter has less computation consumption than UKF(unscented Kalman filter),SUKF(simplex unscented Kalman filter)and EKF(extended Kalman filter).Computer simulation shows that this filter has the same performance as UKF and SUKF,and according to the analysis of the computational requirements of EKF,UKF and SUKF,this filter has preferable practicality value.Finally,the appendix shows the efficiency for this UT.展开更多
基金supported by the National Natural Science Fundationof China(61102109)
文摘To improve the low tracking precision caused by lagged filter gain or imprecise state noise when the target highly maneuvers, a modified unscented Kalman filter algorithm based on the improved filter gain and adaptive scale factor of state noise is presented. In every filter process, the estimated scale factor is used to update the state noise covariance Qk, and the improved filter gain is obtained in the filter process of unscented Kalman filter (UKF) via predicted variance Pk|k-1, which is similar to the standard Kalman filter. Simulation results show that the proposed algorithm provides better accuracy and ability to adapt to the highly maneuvering target compared with the standard UKF.
基金supported by the Program for New Century Excellent Talents in University,Ministry of Education,China under Grant No. NCET-05-0803
文摘In this paper,a new simplex unscented transform(UT)based Schmidt orthogonal algorithm and a new filter method based on this transform are proposed.This filter has less computation consumption than UKF(unscented Kalman filter),SUKF(simplex unscented Kalman filter)and EKF(extended Kalman filter).Computer simulation shows that this filter has the same performance as UKF and SUKF,and according to the analysis of the computational requirements of EKF,UKF and SUKF,this filter has preferable practicality value.Finally,the appendix shows the efficiency for this UT.