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논문 기본 정보

자료유형
학술저널
저자정보
Byung-Chan Sun (한국항공우주연구원) Yong-Kyu Park (한국항공우주연구원) Woong-Rae Roh (한국항공우주연구원) Gwang-Rae Cho (한국항공우주연구원)
저널정보
한국항공우주학회 International Journal of Aeronautical and Space Sciences International Journal of Aeronautical and Space Sciences Volume.11 Number.4
발행연도
2010.12
수록면
303 - 312 (10page)

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초록· 키워드

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This paper introduces the upper stage attitude control system of KSLV-I, which is the first space launch vehicle in Korea. The KSLV-I upper stage attitude control system consists of two electro-hydraulic actuators and a reaction control system using cold nitrogen gas. A proportional, derivative, and integral controller is designed for the electro-hydraulic thrust vectoring system, and Schmidt trigger ON/OFF controllers are designed for the reaction control system. Each attitude controller is designed to have enough stability margins. The stability and performance of KSLV-I upper stage attitude control system is verified via hardware in the loop tests. Hardware in the loop tests are accomplished for perturbed flight conditions as well as nominal flight condition. The test results show that the attitude control loop of KSLV-I upper stage is very stable and the attitude controllers perform well for all flight conditions. Attitude controllers designed in this paper have been successfully applied to the first flight of KSLV-I on August 25, 2009. The flight test results show that all attitude controllers of the KSLV-I upper stage performed well and satisfied the accuracy specifications even during abnormal flight conditions.

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Abstract
1. Introduction
2. Overview of KSLV-I
3. Attitude Controller Design
4. Stability and Performance Test
5. Flight Test Results of KSLV-I
6. Conclusions
References

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