• Aerospace Industry
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• s.94
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• pp.22-25
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• 2007

• Aerospace Engineering and Technology
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• v.1 no.2
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• pp.173-178
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• 2002

Traditionally, for space program whose operation environment is severe, high reliability parts, that is class s microcircuit, JANS level semiconductor, and ER passive parts, are reliable choices. But in some case, we must use 'Non-standard Part' which is not verified as high reliability standard part. To use 'Non-standard Part' in space application, the manufacturer should qualify the part and screen potential week part from the flight lot. In this technical memo, I introduce the flight part verification process for KOMPSAT 1 and KOMPSAT 2 program.

• 기계와재료
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• v.15 no.1 s.55
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• pp.6-13
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• 2003

• Aerospace Industry
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• v.70
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• pp.21-23
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• 1999

우리나라 우주기술은 선진국에 비해 초보단계의 수준이나 위성체 구조물 기술, 로켓 구조체 기술 및 위성수신기기 분야 등에서는 상당수준의 기술을 확보하였다. 92년 발사된 실험용 소형과학위성인 "우리별 1호"로 우주개발에 착수한 우리나라는 무궁화위성 1,2호 사업을 통해서 위성통신 시스템 및 관련부품에 대한 요소기술을 확보한 상태이며, 다목적 실용위성 개발사업을 통해서 우주산업 기반기술을 확보한 단계이다. 이번호에서는 오는 12월에 발사예정인 다목적실용위성의 개발과정과 의의에 대해서 알아 보기로 하겠다.

• Aerospace Industry
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• v.19
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• pp.50-53
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• 1994

다른 분야도 그렇지만 항공기 분야는 더욱 첨단 기술화하는 과정에서 그 개발비는 이제 아무리 부자나라라고 하더라도 한 나라에서 다 부담하기는 힘겨울 정도이다. 또 첨단기술을 구사한 무기에 이르러서는 더욱 그렇다. 이런 사정으로 부품등의 공급에 의한 상호보완도 하고 운용의 효율화와 경비도 분담하기 위해 공동개발이 유행처럼 되고 있다. 그 속사정을 드려다 보면 국제간 공동개발이란 그렇게 쉽게 단순한 것만도 아니다. 그런 의미에서 군사용을 비롯한 각종 항공 우주분야의 국제공동 개발의 내용을 살펴 보기로 한다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.12
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• pp.1093-1098
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• 2012

Commercial Off the Shelf(COTS) Integrated circuits(ICs) are being increasingly considered for use in space and military applications. Therefore, There is a need to implement standard tests and requirements to ensure reliability of COTS ICs. This paper presents an overview of the ICs screen procedure and methods under the European Cooperation for Space Standardization (ECSS) and Tests Method Standard Microcircuits (MIL-STD-883). We describes the COTS ICs screen test guidelines that are mainly focused after encapsulating. In addition, COTS linear bipolar IC is investigated to evaluate the reliability requirements. The experiment results showed that COTS IC is satisfied with high reliability requirements.

• Current Industrial and Technological Trends in Aerospace
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• v.6 no.1
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• pp.82-89
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• 2008

In this paper a survey was conducted to find out the current components of bipropellant propulsion system for geosynchronous satellites. The purpose of the survey is to list up the alternative components corresponding to the components of chemical propulsion system (CPS) of the communication, ocean, and meteorological satellite (COMS), so that the criterion of survey is whether the alternative components can be applicable to COMS CPS or not. The survey results are described in component-by-component way and the short descriptions of each component and its companies are added. This paper can be useful for beginning a market survey and have a good understanding of the components of bipropellant propulsion system.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.5
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• pp.355-363
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• 2021

Heat resistance performance evaluation and thermal analysis were performed to confirm the applicability of the lyocell-based carbon/phenolic composite material for heat-resistant parts for aerospace. Heat resistance performance evaluation of carbon/phenolic was conducted by Thermal Protection Evaluation Motor (TPEM). In this paper, boundary layer integration code considering the boundary layer analysis of combustion gas and MSC-Marc 2018 considering ablation and thermal pyrolysis were used for the thermal analysis. The ablation and thermal insulation performance were analyzed by the pressure curve of test motor and the cut carbon/phenolic specimens. The thermal response of the lyocell-based carbon/phenolic material was similar to that of the rayon-based carbon/phenolic material. Based on the results through the combustion test, the applicability of heat-resistant parts for aerospace to which domestic lyocell-based carbon fibers were applied was confirmed.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.36 no.3
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• pp.298-305
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• 2008

From design to serial production, aircraft should go thorough complicated certification procedure from airworthiness authority such as Type Certificate, Production Certificate and Certificate of Airworthiness. On the other hand, aircraft components are mandated to receive Technical Standard Order Approval and Production Manufacture Approval before commercial use. As domestic aircraft and LRUs are currently under development, Bilateral Aviation Safety Agreement is promoted for the purpose of increasing aviation safety as well as foreign export. This paper describes the basic aircraft certification procedure and compares the difference in the certification system of US and Korea. Thorough this, it is attempted to suggest a requirements for establishing international certification system.

• Aerospace Engineering and Technology
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• v.4 no.2
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• pp.65-70
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• 2005

The KOMPSAT program is carrying out successfully in spite of the short domestic space development history, but there are still many difficulties in Koreanization of most core parts. Because the development of core parts is essential to participate in the advanced nations in space based on the mid-long term national space program, KARI has carried out development of Fill/Drain valve for propellant/pressurant supply of satellite, which has high possibilities to be koreanized, with Hanwha Corp.. This paper summarizes overall processes of development including design, manufacturing and test, and finally 4 sets of modules were successfully made. Also the satisfaction of performance requirements are verified through acceptance tests.