• Aerospace Engineering and Technology
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• v.11 no.2
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• pp.216-224
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• 2012

This study described about the procedure and method to type certification of KAS 23 civil aircraft that is developed in domestic. It is important to obtain type certification within defined period based on the proposed process and method to prove compliance through certification basis according to certification plan. This process referred to FAA Order 8110.4 C, "Type Certification" and domestic regulation and showed example of compliance check list(CCL) defining means of compliance(MOC). Also, proposed method to prove compliance according to means of compliance and classified item of test & evaluation.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.39 no.7
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• pp.643-651
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• 2011

An experimental study on the failure of aluminum sandwich joints under shear loading was conducted. A total of 60 specimens including three different insert types and two different potting types were fabricated and tested. The test results showed that the through-clearance type of joint fails at the highest load among insert type joints. The failure load of the potted joints with the dimple washer increased by 10% compared to the simple potted joints. As expected, the shear failure load became higher in accordance with the face thickness increase. It was also found that the upper face in contact with the loading tool is more dominant over the failure load.

• Journal of Korea Fishing Vessel Association
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• v.39
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• pp.45-53
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• 1989

• Journal of Korea Fishing Vessel Association
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• v.41
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• pp.56-62
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• 1989

• Journal of the Korean Society for Aviation and Aeronautics
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• v.5 no.1
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• pp.17-30
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• 1997

FIight Test procedures are studied from FAR 23, AC 23-8, and Order 8110.7. We have been studied the main procedures for the type certification of light airplane from the experiences of Chang Gong 91. This study is intended as a reference for small airplane manufacturers, engineers, flight test engineers, and engineering flight test pilots, including government personnel. This study covers flight test items of interest during type certification. These methods and procedures are promulgated, in the interest of standardization, for use during normal category airplane flight test certification activities.

• 한국도로학회지:도로
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• v.4 no.4 s.14
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• pp.3-15
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• 2002

지금까지 1940년대부터 최근까지 건설된 미국의 시험도로에 대한 목적과 주요특징 등에 대해 알아보았다. 과거와 다르게 최근 건설된 시험도로들은 크게 도로 본선 옆에 시공한 시험도로의 형태와 시험 주로 형식의 루프구간으로 이루어져 있음을 알 수 있었다. 이는 시험주로에서는 포장재료 영향 평가를 목적으로, 시험도로에서는 포장층의 구조적 영향을 파악하기 위한 것으로 판단된다. 표 4는 최근 미국에서 건설된 시험도로를 간략하게 요약한 것이다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.416-417
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• 2011

국제적으로 차단기의 성능평가에 가장 광범위하게 적용되고 있는 IEC와 IEEE는 단락고장회로에 대한 차단성능평가 기준의 핵심 요소인 과도회복전압(TRV)을 서로 다른 방법으로 규정하고 있었다. 따라서 제작자는 신제품으로 개발한 동일한 모델의 차단기에 대하여 구매자의 요구에 대응하기 위하여 두 가지 표준에 대한 형식시험 또는 형식 시험인증을 실시해야하므로 불필요한 경제적 비용을 지불해야만 했다. 이러한 어려움을 해소하기 위해 IEC와 IEEE는 1990년대 말부터 두 규정의 부합화를 위한 개정작업을 진행했다. 이에 따라 2008년에는 완전한 부합화를 이루지는 못했지만 TRV에 관한 규정의 상당부분이 부합화가 되었다. 본 논문에서는 부합화된 주요 부분과 시험방법을 제시하였다.

• Journal of IKEEE
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• v.26 no.1
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• pp.1-9
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• 2022

In order to secure the reliability of the power system and to increase the penetration level of distributed energy resources (DERs), requirements such as IEEE 1547 have been revised to strengthen the grid connection standards for DER. This paper proposes a control scheme for smart inverter functions based on IEEE 1547-2018 that satisfy these standards, and introduces a power HILS-based test platform built for verification of smart inverter. Among the smart inverter functions, Volt-var and Frequency-watt allow the curve to be set from the upper level to comply with the interoperability and operation time of enable signals for each function are controlled by references from the upper level. According to the requirement, Volt-var and Frequency-watt are performed via power HILS platform and verified through the measurement results that all of the specified type tests were satisfied.

• The Transactions of the Korea Information Processing Society
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• v.4 no.2
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• pp.552-562
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• 1997

This paper proposes a formal method on confromance testing for INAP(AIN) test sequence generation by optimization technique.In order to implement and prove the dffectiveness of the proposed method,we specify the SRSM of INAP protocol SRF in SDL and generate I/O FSM by using our S/W tool. We generate an opti-mal test sequence by applying our method our method to this reference I/O FSM. We prove experimentally that the length of the generated test sequence by our method is more effective and shorter(i.e 32% improved)than the one geverated by UIO method,and estimate that The test coverage space of our test sequence is larger that of UIO method.

• Aerospace Engineering and Technology
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• v.4 no.1
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• pp.129-142
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• 2005

A semi-monocoque truncated cone structure, which is a main structure for the payload adapter of KSLV-I, was designed. Static test was performed to confirm the reliability of the cone structure under the design loads. Strains and displacements are measured during four load cases; the compressive axial, pure bending, pure shear, and combined loading conditions. The results showed that the cone structure satisfies the design requirements. An equivalent axial load was applied to the cone structure so that the global buckling of the cone structure occurred. The measured buckling load was compared with the predicted one by finite element method. The results show a good agreement.