• Defense and Technology
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• no.8 s.174
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• pp.44-51
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• 1993

F-5 성능개량의 근본적인 배경은 경제성입니다. F-16 한대 도입할 가격이면 대략 10대의 F-5 성능개량이 가능하므로 비용 대 효과 측면에서 많은 국가들이 매력을 느끼고 있습니다 또한 선도 훈련기로서의 필요성이 전투기.성능이 급격히 높아짐에 따라, 성능개량되는 F-5 수준의 항공기로 예비훈련을 함으로써, 고성능 전투기의 비전력화 훈련소요를 상당부분 대체할수 있습니다

• Defense and Technology
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• no.6 s.208
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• pp.16-21
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• 1996

성능개량은 신규 무기체계의 연구개발에 따른 현실적인 제안사항을 보완하면서 기존 무기체계의 성능 개선과 품질향상을 통해 적시적으로, 그리고 점진적으로 첨단기술을 확보할 수 있는 유력한 방법이다. 날로 치열해지는 국제 방위산업 환경에서 살아남기 위해서는 최소 비용으로 최대 효과를 창출할 수 있는 성능개량을 통한 무기체계 획득개발에 역점을 두는 방향으로 추진해야 할 것이다

• Defense and Technology
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• no.5 s.207
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• pp.26-31
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• 1996

성능개량은 전체적으로 순기 비용을 점감하면서 전력화시기를 단축시킬 수 있고, 최소의 비용으로 단기간에 최대의 효과를 얻을 수 있는 효율적이고 경제적인 무기체계 획득방법이다. 특히 국방예산이 제한 될수록, 방위산업 여건이 불리할수록, 그리고 신규 무기체계 연구개발기반이 약할수록 더욱 성능개량을 통한 전력증강의 중요성은 증대된다.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.5
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• pp.899-908
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• 2021

Since the modern weapon system is composed of a complex system, it is quite difficult to derive the priority of performance improvement factors. In addition, research on the method for prioritizing quantitative performance improvement factors considering the opinions of stakeholders is insufficient. In this study, in order to quantitatively derive the priorities of performance improvement factors for K1 tanks and K2 tanks, a survey was conducted with experts with experience in tank development, and the preface data was analyzed using AHP, scoring method, and TOPSIS methods. As a result, priorities were quantitatively derived. The results of this study are expected to be used as decision-making indicators for stakeholders in the future weapon system development and performance improvement stage.

• Journal of Aerospace System Engineering
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• v.17 no.4
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• pp.87-94
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• 2023

This paper addresses the installation and modification design of airframe structures for new and modified equipment installations that are essential for aircraft performance improvement. Typical performance improvement equipment mounted on the exterior of the aircraft include antenna, radar, electro-optical/infrared (EO/IR), and self-protection system equipment, which require structural reinforcement, modification, and mounting design of the green aircraft for operation. In the interior of the aircraft, console and rack structures are modified or added according to user operation requirements. In addition, this is accompanied by the installation design of equipment to be replaced and added for performance improvement, and the according modification of environmental control system components for internal cooling. The engineering process and cases in which airworthiness was verified through the detailed design of airframe structures with structural integrity, operability, and maintainability of performance-improved aircraft are presented.

• Aerospace Engineering and Technology
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• v.2 no.2
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• pp.186-198
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• 2003

Small sized engine test stand has been built up and modified to measure the engine performance for 15g class small UAV propulsion systems. An engine performance standard test stand was developed in order to validate the prediction performance and to shoot trobles. The performance data were measured and analyzed for the newly developed gasoline engine.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.12
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• pp.8314-8324
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• 2015

It has been recognized that in keeping the national defense capability on a leading edge, not only the continued production of weapon systems but also the associated maintenance and upgrades are becoming the subjects of great importance. Based on systems engineering process, the domestic acquisition programs for weapons systems led by DAPA have made some advancement where both new systems development and systems upgrade have attracted attention. On the other hand, as a useful type of domestic acquisition the foreign purchase program has been conceived as a process of simply buying needed weapons from abroad. Therefore, if some degree of development is necessary in system upgrades by foreign purchase, many problems turned out to exist. To study a remedy is the objective of this paper. The issues are analyzed first and then a relevant process is proposed based on a systems engineering method. Also included in the improved process is on how to generate a requirement document and the corresponding template to meet the goals of the upgrades by development. By applying the proposed process and template in the foreign purchase upgrade programs, derivation of more appropriate requirements can be expected, thereby offering effective management of programs and target goals.

• Journal of Korean Society of Environmental Engineers
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• v.34 no.10
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• pp.651-655
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• 2012

This study aimed to investigate the effect of an inorganic conditioner composed of natural inorganic materials on the dewaterbility of sewage sludge and compare the performance with those of conventional organic polymeric conditioners. A dosage of 2.0 mg inorganic conditioner/g sludge TS decreased time to filter test (TTF), specific resistance to filtration (SRF), water content of dewatered sludge cake, turbidity from 146 to 41 sec, from $8.3{\times}10^{14}$ to $2.4{\times}10^{14}$ m/kg, from 82.1 to 77.1%, from 112 to 61.1 NTU, respectively, which was compatible to the conventional cation organic polymer. An inorganic conditioner would be used in sewage sludge treatment as a suitable alternative conditioner. Regression analysis showed a strong relationship among TTF, SRF, and water content.

• Journal of Korean Tunnelling and Underground Space Association
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• v.15 no.3
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• pp.201-214
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• 2013

Lattice girders are widely used as a substitute for H-steel ribs at domestic tunnels. However, lattice girders have a weak point in terms of the support capacity compare to H-steel ribs because of the lower stiffness and the weakness of the welded parts. To improve the weakness of the lattice girder, reformed lattice girders are developed in Korea by adding one more spider and having flat welded surface. Laboratory tests and field measurements were performed for the original and the reformed lattice girders to evaluate the performance of the reformed lattice girders. According to the laboratory compression test, reformed lattice girders have 16% higher load bearing capacity than that of original lattice girders. Reformed lattice girders are more stable than original lattice girders because reformed lattice girders tend to bend less according to the field measurements.

• Defense and Technology
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• no.5 s.135
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• pp.56-63
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• 1990

호주 공군에서 추진하고 있는 여러가지 사업들은 첨단 전자장비의 성능개량 특히 그중에서도 소프트웨어 개발능력 향상에 모아지고 있다. F/A-18의 경우 호주업체와 정부연구기관의 설계, 개발, 시험기술에 의해 호주 공군이 요청하는 대로 이 전투기의 잠재능력을 도출한후 필요한 성능개량작업을 대부분 수행할 것이다. 이에 따라 F/A-18은 보다 긴 항속능력, 장거리 항법시스템, 신형 레이다, 하픈(Harpoon)과 같은 신형 대함미사일을 장착할 수 있게 될 것이다