• Defense and Technology
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• no.1 s.155
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• pp.63-63
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• 1992

• Composites Research
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• v.14 no.2
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• pp.64-72
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• 2001

• The Journal of Aerospace Industry
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• s.67
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• pp.71-94
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• 2004

전 세계 항공 산업의 비약적인 발전과 더불어 최근에는 군사용 및 항공수송을 위해 주간뿐만 아니라 야간에도 많은 비행이 요구되고 있으며, 이에 따라 항공기 안전운행의 필요성이 크게 대두되고 있다. 이러한 항공기의 안전운행에는 다양한 기술적인 발전이 진행되어 왔고, 야간시각시스템(NVIS)의 발전 역시 항공기 조종사에게 주간과 유사한 시각적 영상정보를 제공함으로써 심리적인 불안감을 해소시키고, 운항정보에 대한 신뢰성과 적시성을 증대시키며, 야간에 항공기를 안전하게 운항하기 위해 조종사의 업무부아(work load)를 줄이기 위한 노력으로 큰 관심사가 되어왔다. 또한 이러한 NVIS를 활용한 기술은 현재 군용항공기 뿐만이 아니라. 민간용 항공기, 자동차, 카메라, 레저용 등으로 그 범위가 확대되어 보급되고 있으며, 활용도 또한 커지고 있고, 수년 전부터 국내에도 이러한 기술이 적용되어 왔기에 이러한 항공기용 야간시각시스템(NVIS)에 대한 전반적인 내용을 소개하고, 향후 국내에서 개발/적용되는 항공기의 NVIS 기술에 대한 기본적인 평가방향을 제시하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.628-631
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• 2008

For the remote sensing purpose, radar systems extract the target information, such as the magnitude of reflectivity and the velocity from the spectrum analysis of return echoes through the Doppler filter bank. This conventional spectrum estimation method, FFT(Fast fourier Transform) is widely used in most radar systems. However, the frequency resolution of return echoes can be seriously degraded in fast moving targets because of the short acquisition time. Since the high Doppler frequency resolution is important in the detection and tracking of fast moving targets, it can cause very unsatisfactory results. Therefore, in this paper, the parameter spectrum estimation method called AR(Autoregressive) spectrum estimation, is investigated to overcome these problems.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.2080-2093
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• 2008

Disk brake system take charge of maximum braking energy among the mechanical brake systems for high speed train. For this reason, Metallic friction materials and heat resistant steel disk is adopted at disk brake system for high speed train. It was investigated tribological characteristics(friction coefficient, friction stability, wear rate and braking temperature) between some kinds of metallic friction materials and heat resistant steel disk. Cu-based friction material for high speed train have suitable tribological characteristics.

• 한국항공운항학회:학술대회논문집
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• 2005.11a
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• pp.151-154
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• 2005

• Aerospace Engineering and Technology
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• v.8 no.2
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• pp.54-60
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• 2009

Qualification test items and those certification procedures of aircraft hydraulic pump are investigated in this report. Weight minimization through optimal design of aircraft hydraulic pump and its certification process investigation are very important. In this report, some fundamental performance data was presumed for the normal aircraft hydraulic pump, and then basic procedures for qualification tests are presented.

• Aerospace Industry
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• v.76
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• pp.53-55
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• 2001

경기도 화성시에 위치한 보원경금속(주)는 자동차, 선박, 철도, 광학 기계, 건설, 방산품, 반도체 등 다양한 분야에 걸쳐 알루미늄 압출재를 생산하고 있는 중소기업이다. 최근 이 업체는 5년 이내에 국내 항공기용 알루미늄 압출재의 수준을 세계시장에 자랑하겠다는 야심찬 계획을 가지고 항공우주사업에 진출했다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.25 no.2
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• pp.18-24
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• 2017

Results of the experimental research are described in this thesis, which are about braking characteristics of aircraft ABS brake system with different ground conditions. Dynamo-tests were conducted with the state of the application aircraft condition and with two different ground conditions. The Braking characteristics on each ground condition were drawn from the results of occurrence of skid, braking distance and deceleration. The braking performance of the application aircraft could be anticipated and the efficient range of braking operation could be set with those results.

• Aerospace Engineering and Technology
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• v.6 no.2
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• pp.229-235
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• 2007

Reliability is the ability of a system or component to perform its required functions under stated conditions for a specified period of time. It is recognized that reliability is a key point of technical competency. This paper presents background of reliability and accelerated test concept, and verified the MTBF and assessed safety of airborne starter-generator through accelerated life test.