• 한국항공우주학회지
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• 제43권10호
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• pp.910-919
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• 2015

전투기 탑재용 무장제어 알고리듬은 교전상황에서 전투기의 임무 수행 및 생존과 직결된다. 공대지 유도탄의 경우 조종사에게 LAR로 알려진 발사 유효 범위를 무장제어 알고리듬을 통하여 전투기 MFD상에 전시해 준다. LAR는 교전 거리의 계산을 통해 산출된 사거리 테이블을 이용하여 생성된다. 본 논문에서는 AGM-84와 AGM-88 공대지 유도탄의 운용모의에 대하여 소개하고, 이를 바탕으로 Pseudo 6자유도 모델에 기반한 사거리 테이블 산출과 실시간 LAR 산출 알고리듬에 대한 내용을 언급하였다. 구성한 알고리듬의 성능 검증을 위하여 모의대상 유도탄의 교전 시뮬레이션을 수행하고 LAR를 산출하여 분석하였다.

• Structural Engineering and Mechanics
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• 제62권1호
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• pp.107-111
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• 2017

This paper deals with critical buckling load optimization of symmetric angle-ply laminated stepped flat columns under axial compression load. The design objective is the maximization of the critical buckling load and the design variable is the fiber orientations in the layers of the laminates. The classical laminate plate theory is used for the finite element solution of the laminated stepped flat columns. The modified feasible direction (MFD) method is used for the optimization routine. For this purpose, a program based on FORTRAN is exploited. Finally, the optimization results are presented for width ratios (b/B), ratios of fillet radius ($r_1/r_2$), aspect ratios (L/B) and boundary conditions. The results are presented in graphical and tabular forms and the results are compared.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 추계학술대회 논문집
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• pp.53-55
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• 2007

This paper describes an implementation of a wide-range dimming controller of a LED backlight for Avionics applications such as the control data unit(CDU) and multi-function display(MFD). A feedback controller using a light sensor is proposed to control the brightness in the low dimming range. The proposed controller provides an improved control performance in the wide dimming range of 1:3000 even under the temperature variations. The experimental results are provided to show the effectiveness of the proposed control system.

• Communications for Statistical Applications and Methods
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• 제5권3호
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• pp.905-926
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• 1998

We propose a modified mid P-value method to reduce the conservativeness for the inference of conditional associations in three-way contingency tables. This improves the ordinary mfd P-value method. For $2{\times} 2${\times} K$ tables, we propose confidence intervals for an assumed common odds ratio based on inverting two separate one-sided tests using the modified mid P-value. Also, an alternative and usually even better ways of constructing intervals, based on Inverting a two-sided test, are presented. The actual probability of coverage of a 100($1-\alpha$)% confidence interval is centered about the nominal level, but the modified mid P-value approach gives actual coverage probability even closer to the nominal level than the ordinary mid P-value approach.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.462-467
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• 2003

For the Space-borne optical imaging payload system design, light weighting and moderate stiffness of mirror and/or mirror fixation device is very important aspects. The front surface of mirror is regulated by optical performance requirement, but the shape of backplate of mirror is to be optimised while satisfing the required stiffness and weight. According to the results, the best shape of backplate cell is triangular. And also related geometric dimensions and the optimised mounting point of MFD(Mirror Fixation Device) is presented. Finally, natural frequencies and shpaes of mirror structure are analysed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 심포지엄 논문집 정보 및 제어부문
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• pp.442-444
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• 2007

This paper presents an architecture of UPnP Bridge that allows controlling Non-iP devices from UPnP control point, without modification to Non-IP device or UPnP control point implementations. UPnP devices must provide SSDP discovery, SOAP control and GENA event processes. To represent Non-IP devices to UPnP devices, UPnP Bridge provides these functionalities on behalf of Non-IP devices. We provides two method to interoperability between UPnP and Non-IP devices, Message Field Description, Non-UPnP Proxy devices. And solution to integrate heterogeneous networking standards(RS232C, CAN, IEEE1394, USB) is provided.

• 한국군사과학기술학회지
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• 제11권3호
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• pp.30-39
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• 2008

An artificial vision aided NDGPS/INS system has been developed and tested in the dynamic environment of ground and flight vehicles to evaluate the overall system performance. The results show the significant advantages in position accuracy and situation awareness. Accuracy meets the CAT-I precision approach and landing using NDGPS/INS integration. Also we confirm the proposed system is effective enough to improve flight safety by using artificial vision. The system design, software algorithm, and flight test results are presented in details.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2017년도 제56차 하계학술대회논문집 25권2호
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• pp.413-414
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• 2017

항공전자 시스템 및 소프트웨어 기술의 복잡성이 증가함에 따라 소프트웨어의 신뢰성을 보장하는 방법으로 모델 기반 소프트웨어 개발의 필요성이 증가하고 있다. 본 논문에서는 모델기반 소프트웨어 설계를 이용하여 항공기 콕핏 내 주요 계기를 통합한 MFD(Multi-function Display)를 설계하고, 실시간 비행 데이터를 생성하여 시뮬레이션한 결과를 보인다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제21권2호
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• pp.220-224
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• 1999

The acrofacial dysostosis(AFD) is a rare heterogenous disorders combining varying severities of mandibulofacial dysostosis(MFD) with pre and/or post axial limb abnormalities. The Nager syndrome is characterized by preaxial limb defects whereas Miller syndrome is characterized by post axial limb defects. Our AFD case is a 14-year old female. She showed malar hypoplasia, cleft lip & palate(Rt, Lt side), wide nasal bridge, telecanthus. Her right thumb was abscent and middle phalanx, radius, carpal bones of right hand were hypoplastic, and metatarsus varus was present. She showed normal stature and intelligence.

• Steel and Composite Structures
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• 제13권3호
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• pp.207-223
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• 2012

This paper deals with critical thermal buckling load optimization of symmetrically laminated four layered angle-ply plates with one or two different intermediate line supports. The design objective is the maximization of the critical thermal buckling load and a design variable is the fibre orientation in the layers. The first order shear deformation theory and nine-node isoparametric finite element model are used for the finite element solution of the laminates. The modified feasible direction (MFD) method is used for the optimization routine. For this purpose, a program based on FORTRAN is used. Finally, the numerical analysis is carried out to investigate the effects of location of the internal line supports, plate aspect ratios and boundary conditions on the optimal designs and the results are compared.