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http://dx.doi.org/10.20910/JASE.2022.16.4.60

Improvement of Transfer Alignment Performance for Airborne EOTS  

Kim, Minsoo (Agency for Defense Development)
Lee, Dogeun (Korea Aerospace Industries, Ltd.)
Jeong, Chiun (Korea Aerospace Industries, Ltd.)
Jeong, Jihee (Daewoo Shipbuilding and Maritime Engineering Co., Ltd.)
Publication Information
Journal of Aerospace System Engineering / v.16, no.4, 2022 , pp. 60-67 More about this Journal
Abstract
An Electro-Optical Tracking System (EOTS) is an electric optical system with EO/IR cameras, laser sensors, and an IMU. The EOTS calculates coordinates of targets, using attitude and acceleration measured by the IMU. In particular for an armed aircraft, the performance of the weapon system depends on how quickly and accurately it acquires the target coordinates. The IMU should be operated after alignment is complete, to meet the coordinate accuracy required by the weapon system so the initial stabilization time of the IMU should be reduced, by quickly measuring the attitude and acceleration. Alignment is the process of determining the initial attitude by resolving the attitude error of the IMU, and the IMU of mission equipment such as an airborne EOTS, uses velocity matching based on the velocity from GPS/INS for aircraft navigation. In this paper, a method is presented to improve the transfer alignment performance of the airborne EOTS, by maneuvering aircraft and the mission equipment. First, the performance factor of the alignment was identified, as a heading error through the velocity matching model and simulation results. Then acceleration maneuvers and attitude changes were necessary, to correct the error. As a result of flight tests applied to an EOTS on a OOO aircraft system, the transfer alignment performance was improved as the duration time was decreased, by more than five times when the aircraft accelerated by more than 0.2g and the EOTS was moving until 6.7deg/s.
Keywords
Inertial Measurement Unit; Transfer Alignment; Velocity Matching; Electro-Optical Tracking System;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 K.Song, C.Bae, and J. Lyou, "A Transfer Alignment Algorithm Using Velocity and Quaternion Partial Matching Methods", Journal of Control, Automation and Systems Engineering, Vol. 3, No.3, pp. 238-243, 1997
2 J. E. Kain and J. R. Cloutier, "RAPID TRANSFER ALIGNMENT FOR TACTICAL WEAPON APPLICATION", Proc. of Guidance, Navigation and Control Conference, pp.1290-1300, 1989
3 C. Yang, K. Park, H. Kim and D. Shim, "Transfer Alignment Using Velocity Matching/Parameter Tuning and Its Performance and Observability Analysis " , Journal of Advanced Navigation Technology, Vol.19, No. 5, pp.389-394, 2015   DOI
4 C. Kin, I. Lee, J. Oh, H. Yu and H. Park, "A Study on Specification and Design of In-Flight Transfer Alignment", Proc. of the Korea Institute of Military Science and Technology Conference, pp. 159-160, 2019.
5 J. Farrell, M. Barth, The Global Positioning System and Inertial Navigation, McGraw-hill, New York, 1998
6 D. Titterton and J. Weston, Strapdown Inertial Navigation System, 2nd Ed., IET, London, 2004
7 J. Son, W. Choi, S. Kim, S. Oh, S.Lee and D. Hwang, "Measurement Time-Delay Compensation and Initial Attitude Determination of Electro-Optical Tracking System Using Augmented Kalman Filter", Journal of Korea Multimedia Society, Vol. 24, No. 12, pp. 1589-1597, 2021   DOI
8 P. Groves, "Navigation Using Inertial Sensors", IEEE Aerospace and Electronic Systems Magazine, Vol. 30, No. 2, pp. 42-69, 2014   DOI
9 Y. Lim, K. Ma, M. Kim, and J. Lee, " A Transfer Alignment Algorithm Study for an Aircraft", Proc. of the 2010 KSAS Fall Conference, pp. 726-729, 2010
10 Z. Shiler and S. Dubowski, "Time optimal paths and acceleration lines of robotic manipulators", Proc. of the 26th Conf. Decision and Control, pp. 98-99, 1987.
11 W. Chen, Z. Yang, S. Gu, Y. Wang, and Y. Tang, "Adaptive transfer alignment method based on the observability analysis for airborne pod strapdown inertial navigation system", Scientific Reports, Vol. 12, No. 1, pp. 1-14, 2022   DOI