초록 ▼

● 위성의 진동 환경이 고정밀 위성 탑재체의 지향 안정성과 성능에 미치는 영향성 분석
- 위성체의 주요 미소진동원의 특성 시스템 동정 및 모델링
- 위성체 미소진동원 모델, 위성 구조 모델, 광학 탑재체 성능 모델, 진동 절연장치 모델을 일체화한 미소진동 영향성 평가 해석 framework 개발 및 검증
- 실험 시 임의의 미소진동원의 진동 특성을 모사할 수 있는 미소진동 에뮬레이터 개념 제안 및 개발 (특허 등록)
- 미소진동 영향성 분석 및 절연장치의 성능 평가를 위한 Testbed 설계 및 제작
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● 위성의 진동 환경이 고정밀 위성 탑재체의 지향 안정성과 성능에 미치는 영향성 분석
- 위성체의 주요 미소진동원의 특성 시스템 동정 및 모델링
- 위성체 미소진동원 모델, 위성 구조 모델, 광학 탑재체 성능 모델, 진동 절연장치 모델을 일체화한 미소진동 영향성 평가 해석 framework 개발 및 검증
- 실험 시 임의의 미소진동원의 진동 특성을 모사할 수 있는 미소진동 에뮬레이터 개념 제안 및 개발 (특허 등록)
- 미소진동 영향성 분석 및 절연장치의 성능 평가를 위한 Testbed 설계 및 제작
● 진동원과 탑재체의 특성에 적합하게 튜닝이 가능한 모듈화된 하이브리드형 미세 진동 절연장치의 인증모델(QM) 개발 및 시험 검증
- 우주용 진동 절연장치의 기술 현황 분석
- 다양한 진동 절연장치의 절연 특성 분석
- 미소진동 절연장치 개념 입증 모델 설계, 제작 및 성능 평가
- 구성 재료의 물성 시험 및 우주 환경 적합성 평가
- 모듈화된 하이브리드형 진동 절연장치 엔지니어링 모델 (EM) 설계, 제작 및 성능 평가
- 개발된 진동 절연장치 EM의 성능 보안 평가 및 개선 설계
- 인증 모델 (QM) 개발을 위한 발사 환경 (진동 및 충격)및 우주환경 (열,진공) 시험 수행 및 QM의 진동 절연 성능 평가

Abstract ▼

Ⅱ. Introduction
● Need for the research
- Protection of high precision payloads on a satellite from performance degrading micro-vibration is becoming very important as higher pointing stability requirements are placed on the payloads - Ability to predict on-orbit micro-vibration level and its

Ⅱ. Introduction
● Need for the research
- Protection of high precision payloads on a satellite from performance degrading micro-vibration is becoming very important as higher pointing stability requirements are placed on the payloads - Ability to predict on-orbit micro-vibration level and its influence on various payloads during design phase is required
- Analysis of vibration characteristics transmitted to high precision payloads and a practical vibration isolator that can effectively reduce transmitted vibration is needed
● Purpose of the research
- Analysis on the effect of micro-vibration environment of a satellite on pointing stability and performance of high precision satellite payloads
- Development and experimental verification of qualification model (QM) of modular hybrid vibration isolation device with the tuning capability according to the characteristics of vibration sources and payloads
Ⅲ. Evaluation of the effect of micro-vibration on precision satellite payloads
● Analytic research on the effect of micro-vibration
- Vibration disturbance modeling of major vibration sources on board satellite including reaction wheel
- Development of Integrated jitter analysis framework for evaluating effect of micro-vibration that combines vibration disturbance model, satellite structure model, optical payload model and vibration isolator model
● Experimental research on the effect of micro-vibration
- Development of micro-vibration emulator that can be used to generated vibration disturbance of arbitrary vibration sources (can be used in jitter experiments instead of actual vibration disturbance sources that are expensive and hard to access)
- Design and fabrication of testbed for validating integrated jitter analysis framework and evaluating the performance of micro-vibration isolator
Ⅳ. Development of modular hybrid vibration isolator
● Study on the status of space vibration isolation device technology
● Material property and space compatibility testing of constituent materials
- Basic material property testing of viscoelastic material, viscous fluid, piezoelectric material
- Thermal cycle, outgassing and radiation testing of viscoelastic material, viscous fluid, piezoelectric material
● Design and performance evaluation of various concept verification micro-vibration isolator models (viscous fluid, electromagnet, viscoelastic material, folded beam based isolator)
● Development of hybrid micro-vibration isolator engineering model (EM)
- Isolation performance evaluation of micro-vibration isolator based on viscous fluid
- Isolation performance evaluation of micro-vibration isolator based on electromagnet
● Development of hybrid micro-vibration isolator qualification model (QM)
- Design modification and improvement of viscous fluid based isolator EM
- Isolation performance evaluation of micro-vibration isolator based on viscous fluid QM
- Launch environment tests (vibration and shock)
- Operation environment tests (thermal, vacuum)
Ⅴ. Conclusion and application plans
● Conclusion
- Development and experimental validation of integrated jitter analysis framework that combines micro-vibration disturbance source model, satellite structure model, optical payload model and vibration isolator model
- Development and qualification testing (vibration, shock, thermal and vacuum test) of modular hybrid micro-vibration isolator based on viscous fluid for space application
● Application plans
- Integrated jitter analysis framework can be applied in design phase for evaluating effect of micro-vibration on the performance of optical payloads and for deriving vibration level requirements on optical payloads to satisfy performance requirements
- Hybrid vibration isolator can be space qualified through science and technology satellite or alike. Efforts will be made to implement hybrid vibration isolators on future domestic satellite programs