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단일장치로 발사환경구속 및 결함안전기능이 가능한 전개수납형 교정 메커니즘에 관한 연구

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Author(s)
이명재
Issued Date
2016
Abstract
Tilting calibration mechanism has been widely used for on-board calibration of a spaceborne imaging sensor. The main objective of the mechanism is to reflect a radiance temperature from the reference black body to the image sensor to correct a non-uniformity output characteristics of the sensor. For this, the calibration mechanism is periodically deployed to view the black-body during calibration, and stowed after calibration to avoid field of view interference with the main optical path. However, when the calibration mechanism is unintentionally stopped at a certain position on the main optical path due to motor failure or other problems, it is not possible to perform the main mission of imaging acquisition any more. Therefore, it is required to implement fail-safe function on the mechanism under the emergency state such that the stopped mechanism is intentionally removed from the main optical path by actuating the separation device such as pinpuller or frangibolt-type actuators. In addition, structural safety of mechanical driving part of the mechanism under harsh launch environment can be guaranteed by applying launch lock device. The usage of multi-separation devices for implementing fail-safe function and mechanical constraint on the driving part of the mechanism mightincrease the system complexity and development costs of the calibration mechanism.
To overcome aforementioned drawbacks, we newly proposed a new application of shape memory alloy (SMA) spring actuator to calibration mechanism that provides dual-function of implementing mechanical constraints on driving part of the mechanism and fail-safe function under launch and emergency states, respectively, instead of using conventional separation devices. This is great feature of the mechanism design proposed in this study. In this paper, the operation concept of mechanism, design, and functional test results of the mechanism have been introduced. The functional test results demonstrate that the design approach proposed in this study is feasible for realizing the design goal of the on-board calibration mechanism. In addition, the structural safety and operational functionality of the mechanism under launch environments have been successfully demonstrated through a vibration test.
Alternative Title
A Study on Deploy/Stow-type Calibration Mechanism with Dual-function of Launch Locking and Fail-Safe
Alternative Author(s)
Lee, Myeong Jae
Affiliation
조선대학교 항공우주공학과
Department
일반대학원 항공우주공학과
Advisor
오현웅
Awarded Date
2017-02
Table Of Contents
목 차

LIST OF FIGURES ⅲ

LIST OF TABLES ⅴ

ABSTRACT ⅵ

제1장. 서 론 1

재2장. 단일장치로 발사환경구속 및 결함안전기능이 가능한 교정 메커니즘 7
제1절. 운용 개념 및 설계 주안점 7
제2절. 형상기억합금 스프링 9
제3절. 메커니즘 구성 및 작동원리 15
제4절. 메커니즘 설계 및 제작 21

제3장. 교정 메커니즘 기능 검증시험 31
제1절. 전개 및 수납 모드 기능시험 32
제2절. 결함 안전 모드 기능시험 41

제4장. 교정 메커니즘 발사환경 검증시험 44
제1절. 시험 구성 및 절차 46
제2절. 충격 시험 53
제3절. 준정적 진동 시험 59
제4절. 랜덤 진동 시험 65
제5절. 시험 결과 70

제5장. 결론 79

참고문헌 80

연구 실적 83
Degree
Master
Publisher
조선대학교 대학원
Citation
이명재. (2016). 단일장치로 발사환경구속 및 결함안전기능이 가능한 전개수납형 교정 메커니즘에 관한 연구.
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/13081
http://chosun.dcollection.net/common/orgView/200000265979
Appears in Collections:
General Graduate School > 3. Theses(Master)
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