• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.4
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• pp.765-772
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• 2011

In this paper, a simulation-based method is presented to dispose direction finders in three dimensional space for locating targets using the directional data. A direction finder(DF) is a military weapon that is used to find locations of targets that emit radio frequencies by operating two or more DFs simultaneously. If one or more DFs are operated in the air, the accuracy of location estimation can be enhanced by disposing them in a better configuration. By extending the line method, which is a well-known algorithm for 2-D location estimation, into 3-D space, the problem of 3-D location estimation is defined as an nonlinear programming form and solved analytically. Then the optimal disposition of DFs is considered with the presented method in which methods of simulation and search technique are combined. With the suggested algorithm for 3-D disposition of DFs, regions in which targets exist can be effectively covered so that the operation effect of DF be increased.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.7
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• pp.918-925
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• 2017

Multiple reflections on exterior equipment with complex shape on naval ships cause unexpectedly high Radar Cross Section (RCS) distributions, and the directions of reradiated electromagnetic waves are hard to predict. Therefore, the optimum arrangement of exterior equipments should be considered according to the Radar Absorbing Structure (RAS) method. In this paper, the optimum arrangement for exterior equipments was determined to reduce multiple reflections and RCS even with complex shapes. The sequential descending arrangement method was used to establish an optimum arrangement algorithm. An LCS-2 type model was selected for optimum exterior equipment arrangements. In order to reduce computational cost, RCS distributions and multiple reflection path analysis of exterior equipments was carried out to select exterior equipments for optimum arrangement, and an optimum arrangement was determined to find positions with minimum RCS values. Also, the RCS reduction effect was analyzed using detectable radar range.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.48 no.8
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• pp.621-629
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• 2020

LRU layout is a complex problem that requires consideration of various criteria such as airworthiness, performance, maintainability and environmental requirements. As aircraft functions become more complex, the necessary equipment is increasing, and unmanned aerial vehicles are equipped with more equipment as a substitute for pilots. Due to the complexity of the problem, the increase in the number of equipment, and the limited development period, the placement of equipment is largely dependent on the engineer's insight and experience. For optimization, quantitative criteria are required for evaluation, but criteria such as safety, performance, and maintainability are difficult to quantitatively compare or have limitations. In this study, we consider the installation and maintenance of the equipment, simplify the deployment model to the traveling salesman problem, Optimization was performed using a genetic algorithm to minimize the weight of the connecting cable between the equipment. When the optimization results were compared with the global calculations, the same results were obtained with less time required, and the improvement was compared with the heuristic.

• Plant Journal
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• v.13 no.4
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• pp.41-47
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• 2017

This paper is a study on validation model that can verify the arrangement of equipment constituting offshore plant using system engineering approach in offshore plant tender stage. In order to design offshore plant topside maintenance equipment, topside layout verification should be preceded. However, there are many errors in the bidding stage due to the FEED results that are not perfect, the verification can not be performed sufficiently due to the limitation of the bidding period and others reasons. Therefore, we propose a validation model that can effectively verify the equipment layout within a limited condition by simplifying the main process in the system engineering process, which is a multidisciplinary approach, and confirmed through the Functional Deployment Model. Also, we verified the validation model for topside equipment deployment through case studies.

• Journal of the Korean Institute of Intelligent Systems
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• v.12 no.2
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• pp.157-163
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• 2002

The aim of this study is to establish an evaluation function that can be used in comparison of alternative layouts by quantification of particularities of arrangements. The machinery arrangement is a design phase that decides the location of various equipment in a compartment to make the most of the function of every components and to meet the limit of ship space at the same time. In case of the ship, Only one of the several alternative layouts is selected. This process depends on the experience, knowledge, and judgement of an expert and, as a result of it, it's hard to get an objective evaluation. Therefore, according to quantification by using the fuzzy theory, we suggest a standard that can objectively evaluate alternative layouts.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.04a
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• pp.830-831
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• 2016

최근 다양한 NUI 장비들의 확산에 따라 각 장비에 관한 특성과 배치에 관한 연구가 활발히 진행되고 있다. 실제 환경에서 다양한 센서 장비들을 사용해 실험하기 위해서는 많은 비용이 소요된다. 본 논문에서는 센서 장비간 특성을 반영한 범용 소환현실 가상화 기술을 제안한다. 소환현실 시뮬레이터를 설계하고 구현한 결과, 여러 센서 장비들의 특성을 고려한 배치가 가능함을 확인하였다.

• Proceedings of the Korean Society Of Semiconductor Equipment Technology
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• 2007.06a
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• pp.72-75
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• 2007

본 연구는 TFT-LCD 부품인 Back Light Unit의 광원 역할을 하는 CCFL Assembly 공정을 분석하여 최적의 공정원 배치를 할 수 있도록 하였다. 이에 각 공정의 특성을 파악하고, 이를 Herrmann의 두뇌우성을 적용하여 공정원 배치를 하도록 하였다.

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.129-129
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• 2017

• 월간 기계설비
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• s.139
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• pp.25-27
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• 2002

• Proceedings of the Korean Society of Disaster Information Conference
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• 2017.11a
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• pp.305-306
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• 2017

한국도 더 이상 총기안전지대가 아니며, 강력범죄도 지속적으로 증가하고 있는 상황에서 경찰관의 신체 생명을 적극적으로 보호하면서 무기 사용을 최소화 할 수 있도록 경찰관 장비에 대한 개선점이 필요하다. 장비에 대한 지급이 미흡한 시점에서 경찰관의 안전과 치안유지를 담당하기 위해서는 장비에 대한 보급과 착용이 우선적으로 진행되어야 하며, 경찰 출동차량에 반드시 방탄복, 방검복, 방검장갑, 안전헬멧 등을 필수 배치해서 범죄현장에 대처해야 한다.