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논문 기본 정보

자료유형
학술저널
저자정보
Ja-Chun Koo (Korea Aerospace Research Institute) Hee-Sung Park (Korea Aerospace Research Institute) Max Guba (Airbus Defence and Space GmbH)
저널정보
항공우주시스템공학회 International Journal of Aerospace System Engineering International Journal of Aerospace System Engineering Vol.9, No.2
발행연도
2022.12
수록면
1 - 9 (9page)

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초록· 키워드

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The NEA release mechanism is used to provide restraint and release functions with low shock for critical deployment operations on solar arrays after launch. The GK3 solar array consists of 2 wings and 6 hold down points per panel. The NEA SSD9103S1 is a part of the GK3 solar array hold-down and release mechanism. Each NEA unit is equipped with two Z-diodes which provide power to a NEA unit connected in series after actuation of the fuse wire. This paper presents the hot firing test results of a quadrature NEA SSD9103S1 configuration. One output powers a maximum of 4 NEA SSD9103S1 units simultaneously. The necessary actuation pulse duration has been determined to meet margin requirement for thermal energy of minimum 4. Actuation thermal energy difference is about 6.6% between each half of two fired serial NEAs. Thermal energy margin at worst case is minimum 5.9 in case of an actuation pulse duration of 500 ms. Two series Zener impedance depend on current applied has been characterized by an additional actuation after all fuse wires are open circuit. Total number of actuation commands to the GK3 NEA unit reduce drastically from 24 in case of single NEA configuration down to 8 in case of parallel and quadrature NEA configurations. It can be accommodated by the existing HP2U Pyro design without any impact.

목차

Abstract
1. Introduction
2. Solar Array and HDRM Configuration
3. Pyrotechnic Firing Circuit Description
4. Hot Firing Test
5. Conclusions
References

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