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고기동 환경에서 관성항법장치의 시간지연 보상 전달정렬 기법
이형섭(Hyung-Sub Lee),한경준(Kyung-Jun Han),이상우(Sang-Woo Lee),유명종(Myung-Jong Yu) 대한전기학회 2015 전기학회논문지 Vol.64 No.12
An improved transfer alignment method for a strap-down inertial navigation system (SDINS) is presented here. The alignment accuracy in conventional method is vulnerable to the data latency of a Master INS (MINS) in high maneuverable platforms. We propose a time delay compensation equation considering higher-order terms in the attitude measurement equation of the Kalman filter. The equation incorporates additional information including angular rate, angular acceleration and linear acceleration from the MINS. Simulation results show that the transfer alignment accuracy is significantly improved in the high dynamic environment by incorporating the latency compensation technique.
연속발사 충격에 강인한 SDINS 신속 초기정렬기법 설계
이형섭(Hyung-Sub Lee),한경준(Kyung-Jun Han),이상우(Sang-Woo Lee),유명종(Myeong-Jong Yu) 대한전기학회 2016 전기학회논문지 Vol.65 No.6
In this paper, a SDINS(Strapdown Inertial Navigation System) rapid initial alignment technique robust to the pyro-shock in multi-launch rocket system is proposed. The proposed method consists of three steps. Firth, transfer alignment is performed to estimate misalignment between MINS(Master INS) and SINS(Slave INS), and the estimated misalignment is written in the memory when transfer alignment is completed. Next, the pre-filtering process is performed to get rid of the acceleration error induced by launcher vibration. Finally, the horizontal alignment is performed to compensate misalignment variation caused by pyro-shock. We verified the performance of the proposed alignment method comparing with the conventional transfer alignment method. The simulation shows that the proposed initial alignment technique improves alignment performance.