• Title/Summary/Keyword: Military Power

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Analysis for Performance of the HT-PEFC based Auxiliary Power Unit by Aspen Plus Software (Aspen Plus 프로그램에 의한 장갑차량용 고온고분자전해질 연료전지 기반 보조전원장치 성능 시뮬레이션 분석)

  • Yu, Minkyu;Park, Ji-il;Kwon, Hyuksang
    • Journal of the Korea Institute of Military Science and Technology
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    • v.19 no.2
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    • pp.211-217
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    • 2016
  • The fuel cell based auxiliary power unit (APU) is promising for power source of armed vehicles due to its silence and high efficiency. Especially, the on board hydrogen generation and fed to fuel cell system was core technology of this power system. In this study, we analyzed the performance of the Auto thermal reactor (ATR) that produce the hydrogen from the fuel, integrated High temperature polymer electrolyte fuel cell (HT-PEFC) by Aspen plus software. The fuel was designed as a n-dodecane for analysis of military fuel (JP-8).

A Study on the Procedure of Fault on Electric Power Systems by Special Fibers (특수섬유에 의한 전력계통의 고장유발 과정 고찰)

  • Rim, One-Kwon;Kim, Seong-Shik;Jung, Dong-Hak
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.5
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    • pp.667-675
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    • 2009
  • Faults can be generated at electric power systems by variety of both certain and uncertain reasons, which may cause harmful effects on electrical apparatuses under operation and stability of electric power system operations, and may also lead to great confusions and inconveniences to individual livings, public works, industrial activities, services, military affairs, etc.. In some cases, intentional inductions of faults are committed for specific purposes, and it is necessary to understand the procedures of fault by some foreign materials. In this paper, compositions and operations of electric power systems, summaries of electrical fault phenomena and fault protection, and restrictions to power system operation were outlined. And the analogies on the procedure of faults from former papers were introduced, and test results that revealed the validity of those analogies were also introduced.

A Study on Predicting Installation Scale of Photovoltaic Panels and Hydrogen Fuel Storage Facilities to Achieve Net Zero Carbon Emissions Exploiting Idle Sites of Military Bases (군부대 유휴부지를 활용한 탄소 순 배출량 제로 달성을 위한 태양광 패널 및 수소 연료 저장시설의 설치 규모 예측)

  • Donghak Moon;Jiyong Heo
    • Journal of the Korea Institute of Military Science and Technology
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    • v.27 no.1
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    • pp.8-14
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    • 2024
  • In this study, the scale of renewable photovoltaic(PV) panels and hydrogen fuel storage facilities required to achieve "net zero carbon emissions" in military facilities were predicted based on actual electricity consumption. It was set up to expect the appropriate installation size of PV panel and hydrogen fuel storage facility for achieving carbon neutrality, limited to the electricity consumption in the public sector, including national defense and social security administration in Yeongcheon. The experimental results of this paper are largely composed of two parts. First, representative meteorological factors were considered to predict solar power generation in the Yeongcheon area, and solar power generation was estimated through a multiple regression model using deep learning techniques. Second, the size of solar power generation facilities and hydrogen storage facilities in military bases was estimated with the amount of solar power generation and electricity consumption. As a result of this analysis, it was calculated that a site of 155.76×104 m2 for PV panels was needed and a facility capable of storing 27,657 kg of hydrogen gas was required. Through these results, it is meaningful to demonstrated the prospect that military units can lead the achievement of "carbon net zero 2050" by using PV panels and hydrogen fuel storage facilities on idle sites of military bases.

A Study on OMS/MP of a Combat Vehicle Mounted with Weapon Systems for Power and Energy Control Strategy Development and its Application (무기탑재 전투차량의 임무부하분석을 위한 OMS/MP 방법론과 적용 연구)

  • Yoo, Sam-Hyeon;Lee, Jong-Woo;Lee, Min-Hyung;Lee, Seung Min;Jang, Myeong-Eon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.16 no.1
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    • pp.48-55
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    • 2013
  • To obtain the requirements of capability and analyze mission loads for weapon systems which are in process of development, Operational Mode Summary/Mission Profile(OMS/MP) should be documented in advance. In this paper, we have proposed a systematic and practical OMS/MP model processes of a weapon mounted combat vehicle for analyzing power and energy strategy. The wartime and peacetime OMS/MP of a hybrid wheeled combat vehicle which is mounted with an anti-tank guided weapon(ATGW) is also presented as its application.

The Steering Characteristics of Military Tracked Vehicles with Considering Slippage of Roadwheel (로드휠의 슬립을 고려한 군용 궤도차량의 조향특성에 관한 연구)

  • Lim, Won-Sik;Yoon, Jae-Seop;Kang, Sang-Wook
    • Transactions of the Korean Society of Automotive Engineers
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    • v.17 no.2
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    • pp.57-66
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    • 2009
  • In this paper, the steering characteristics of tracked vehicles are studied for the improvement of steering performance. The important design factor of military vehicles is high mobility. It is influenced by weight of a vehicle, engine capacity, power-train, and steering system. The military vehicle, which is equipped with caterpillar, has unique steering characteristics and is quite different from that of a wheeled vehicle. The steering of tracked vehicles is operated in the power pack due to different speeds of both sprockets. Under cornering conditions, power split and power regeneration are happened in the power pack. In case of power regeneration, power is transferred outside track after adding engine power and power inputted inside track from the ground. However, excessive power regeneration is transferred in the power pack. It damages mechanical elements. Therefore, it is necessary to analyze the steering system and check mentioned problem above. In this study, the detailed dynamic model of steering system is presented, which includes slippage between track and roadwheel, inertia force, and inertia moment. Finally, our model is compared with the Kitano model and we verified the validity of the model.

Military Training Schedule Optimization Model for Improving the Combat Power of Troop (부대 전투력 향상을 위한 군 교육훈련 일정계획 최적화 모형)

  • Park, Cheol Eon;Jeong, Chang Soon;Kim, Kyung Sup
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.10
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    • pp.240-247
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    • 2020
  • The Korean military is having difficulty maintaining combat power due to the insufficient troop numbers caused by a demographic cliff and the reduction of the mandatory military service period. Recently, discussions on improving the military training system have increased significantly. This paper proposes an optimization model to establish military training schedules to improve combat power. The oblivion and learning effects on training tasks were quantified through a survey and applied to the model. The objective value, combat power, was calculated based on the total task scores of the unit members and the number of task failures after four weeks. The scenarios were configured by the change in educational conditions and initial scores of some tasks. As a result of scenario experiments, combat power has increased by at least 10% and up to 77%, which is sufficient to maintain combat power considering the change in troops. In addition, the planning of combat skill tasks has a significant impact on combat power. Through this research model, it is expected that military training managers will be able to establish a training schedule that maintains or improves the combat power of troops effectively.

Study on Power Control and Optimal Management for Dog-Horse Robot (견마로봇의 전력제어 및 최적 운용에 대한 연구)

  • Kang, Tae-Ha;Huh, Jin-Wook;Kim, Jun;Kang, Sin-Cheon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.13 no.3
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    • pp.343-348
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    • 2010
  • Recently, unmanned electric vehicles are increasingly interested among all of the world since they can provide low exhaust gas, high efficiency and high mobility. To exploit their silent maneuver and high mobility, unmanned electric vehicles have been developed since early 1980's for military. However, it is not easy to design and control a power system satisfying operating duration and mobility performance requirements based on various mission profiles for military use under the conditions of limited space and weight. Moreover it is also necessary to prevent over-charge, over-discharge and voltage unbalance between cells of battery to secure high voltage battery which is serially connected with muti-cells. In this paper, we presents power control and optimal management method for the dog-horse robot which adopts a electric power system and suggests a guide-line to manage and control to secure high voltage battery.

Development of the Power Assist System for High Efficiency and Lightweight Wearable Robot in Unstructured Battlefield (비정형화된 전장 환경에 활용 가능한 고효율-경량형 외골격 착용 로봇의 근력 보조 시스템 개발)

  • Huichang Park
    • Journal of the Korea Institute of Military Science and Technology
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    • v.26 no.4
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    • pp.313-323
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    • 2023
  • The wearable robot system is designed to assist human skeletal and muscular systems for enhancing user's abilities in various fields, including medical, industrial, and military. The military has an expanding need for wearable robots with the integration of surveillance/control systems and advanced equipment in unstructured battlefield environments. However, there is a lack of research on the design and mechanism of wearable robots, especially for power assist systems. This study proposes a lightweight wearable robot system that provides comfortable wear and muscle support effects in various movements for soldiers performing high-strength and endurance missions. The Power assist mechanism is described and verified, and the tasks that require power assist are analyzed. This study explain the system including its driving mechanism, control system, and mechanical design. Finally, the performance of the robot is verified through experiments and evaluations, demonstrating its effectiveness in muscle support.

Shift in Warfare Paradigm and Military Transformation (전쟁패러다임의 전환과 군사변혁)

  • Jeong, Chun-Il
    • Journal of National Security and Military Science
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    • s.4
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    • pp.381-418
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    • 2006
  • In present, advanced countries in the world are seen concentring on Military Transformation to create new military capability as there is a shift in Warfare Paradigm. Rapid development of technology enables military system, operational concept and organization innovated. As a result, Revolution in Military Affairs(RMA) that dramatically increased warfighting capability is pursued. Especially, advanced information technology constructs system of systems with abilities of battle visualization, information sharing in battlefield, long-range strike capability that are interoperable and combined. Corresponding to this, engagement methods and organizations are being progressively developed. The purpose of this thesis is overview of newly developing Warfare Paradigm and analysis of tendency of Military Transformation that advanced countries are pursuing preparation to this. Above all, specific aspects and contents of the Warfare Paradigm which emerged by information age were summarized. Subsequently, Military Transformation which provides the basic concepts and principles to the advanced countries in the world for the creation of new military capability was discussed. In conclusion, the tendency of Military Transformation by U.S.A, Japan, China, and Russia surround the Korean peninsular as the major power in military was carefully observed.

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Power Algorithms for Analysis of Variance Tests

  • Hur, Seong-Pil
    • Journal of the military operations research society of Korea
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    • v.13 no.1
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    • pp.45-64
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    • 1987
  • Power algorithms for analysis of variance tests are presented. In experimental design of operational tests and evaluations the selection of design parameters so as to attain an experiment with desired power is a difficult and important problem. An interactive computer program is presented which uses the power algorithms for ANOVA tests and creates graphical presentations which can be used to assist decision makers in statistical design. ANOVA tests and associated parameters (such as sample size, types and levels of treatments, and alpha-level)are examined.

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