SDINS Transfer Alignment using Adaptive Filter for Vertical Launcher

Park, Chan-Ju; Lee, Sang-Jeong

Journal of the Korea Institute of Military Science and Technology 2007;10(1):14-21.

Chan-Ju Park, Sang-Jeong Lee

¹
²CNU

적응필터를 사용한 수직상태 SDINS 전달정렬

박찬주, 이상정

¹국방과학연구소
²충남대학교

Abstract

This paper proposes SDINS(strapdown inertial navigation system) transfer alignment method for vertical launcher using an adaptive filter in the ship. First, the velocity and attitude matching transfer alignment method is designed to align SDINS for vertical launcher. Second, the adaptive filter is employed to estimate measurement noise variance in real time using the residual of measurements. Because it is difficult to decide measurement noise variance when noise properties of the ship SDINS are changed. To verify its performance, it is compared with the EKF(Extended Kalman filter) using uncorrect measurement variance. The monte carlo simulation results show that proposed method is more effective in estimating attitude angle than EKF.

Key Words: INS, Vertical Launcher, Transfer Alignment, Adaptive Filter