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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Institute of Military Science and Technology
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The Korea Institute of Military Science and Technology
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Volume & Issues
Volume 19, Issue 3 - Jun 2016
Volume 19, Issue 2 - Apr 2016
Volume 19, Issue 1 - Feb 2016
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Detection Performance Improvement by Limit&STC Assembly Betterment of Surveillance Radar
Yoon, Jaebok ; Kim, Siok ; Keum, Jongju ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 1~8
DOI : 10.9766/KIMST.2016.19.1.001
In this paper, we have described the performance improvement of surveillance radar to prevent damage or malfunction of surveillance radar RF head unit due to the strong reflections caused by artificial obstacles at close range. We have proposed a technique to improve the performance of the RF head unit as a solution to overcome the limitations of the operating system and improve radar performance. We have verified the effectiveness of the improvement by comparing the before and after results applied to actual system.
Enhancement of Source Localization Performance using Clustering Ranging Method
Lee, Ho Jin ; Yoon, Kyung Sik ; Lee, Kyun Kyung ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 9~15
DOI : 10.9766/KIMST.2016.19.1.009
Source localization has developed in various fields of signal processing including radar, sonar, and wireless communication, etc. Source localization can be found by estimating the time difference of arrival between the each of sensors. Several methods like the NLS(Nonlinear Least Square) cost function have been proposed in order to improve the performance of time delay estimation. In this paper, we propose a clustering method using the four sensors with the same aperture as previous methods of using the three sensors. Clustering method can be improved the source localization performance by grouping similar estimated values. The performance of source localization using clustering method is evaluated by Monte Carlo simulation.
A Study on the Quantitative Management Scheme of Weapon Systems T&E
Jang, Yongsik ; Bang, Heejin ; Han, Sunghee ; Kim, Jaekab ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 16~25
DOI : 10.9766/KIMST.2016.19.1.016
In this paper, we suggest a quantitative management scheme to accomplish effective weapon systems test and evaluation service(T&E). The Capability Maturity Model Integration(CMMI) process model has been introduced and applied for that purpose by the 8th directorate, Agency for Defense Development(ADD). Although a CMMI process model was developed focusing on the software development, systematic approaching scheme in the CMMI process model can be utilized for the quantitative management implementation of a weapon systems T&E service. To manage a T&E service quantitatively, at first, organizational performance objectives and sub processes are established, and then each performance indicators and performance base lines are followed.
Absolute Capacity Estimation Method with Temperature Effect for a Small Lithium-polymer Battery
Kim, Hankyong ; Kwak, Kiho ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 26~34
DOI : 10.9766/KIMST.2016.19.1.026
Military devices and systems powered by batteries need to operate at extreme temperature and estimate the available capacity of the battery at different temperature conditions. However, accurate estimation of battery capacity is challenging due to the temperature-sensitive nature of electrochemical energy storage. In this paper, Peukert`s equation with temperature factor is derived, and methods for estimating the absolute capacity of lithium-polymer battery and the state-of-charge(SOC) with respect to varying currents and temperatures are presented. The proposed estimation method is experimentally verified under three different discharge currents(0.5 A, 1 A, 3 A) and six different temperatures ranging from -30 to 45 deg. C. The results show the proposed method reduces the Peukert`s estimation error by up to 30 % under or at extreme condition.
The Trend of System Level Thermal Management Technology Development for Aero-Vehicles
Kim, Youngjin ; Son, Changmin ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 35~42
DOI : 10.9766/KIMST.2016.19.1.035
Modern aircraft is facing the increase of power demands and thermal challenges. In accordance with the application of more electric technology and advanced mission requirement, aircraft system requires increase of power generation and it cause increase of internal heat generation. Simultaneously, restrictions have significantly been imposed to the thermal management system. Modern aircraft must maintain low radar observability and infra-red signature. In addition, new composite aircraft skins have reduced the amount of heat that can be rejected to the environment. The combination of these characteristics has increased the challenges faced by thermal management. In order to mitigate the thermal challenges, the concept of system level thermal management should be applied and new modeling and simulation tools need to be developed. To develop and utilize system level thermal management technology, three key points are considered. Firstly, the performance changes of subsystems and components must be assessed at an integrated thermal system. It is because that each subsystem and component interacts with other subsystems or components and it can directly effects on overall system performance. Secondly, system level thermal management requirements and solutions must be evaluated early in conceptual design process as vehicle and propulsion system configuration decisions are being made. Finally, new component level thermal management technologies must focus on reducing heat generation and increasing the availability of heat sinks.
An Indirect Data Transfer Technique based on MIL-STD-1553B for the Software Upgrade of Embedded Equipments on a Missile Assembly with Booster
Kim, Kipyo ; Yu, Haesung ; Lee, Heoncheol ; Yun, Seokjae ; Ahn, Keehyun ; Woo, Deogyoung ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 43~49
DOI : 10.9766/KIMST.2016.19.1.043
This paper addresses the problem of the software update or upgrade of embedded equipments on a missile assembly with booster. Because the embedded equipments are assembled delicately and closely one another with various communication and power cables, they should be very carefully disassembled to directly upgrade the software of a certain embedded equipment. This may cause not only the costs for disassembly and reassembly but also additional tests to verify the completeness of the reassembled missile as a missile assembly with booster. This paper presents an indirect data transfer technique based on MIL-STD-1553B through Guidance Control Unit to easily upgrade the software of other equipments without any additional costs caused by disassembly and reassembly. The presented technique was successfully applied to the software upgrade of various equipments on real missile assembly with booster.
Border Guard/Reconnaissance Communication Terminal for Providing Variable Frame Structure and Method for Altering the Frame Structure
Kim, Janghun ; Han, Chulhee ; Seo, Bongyong ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 50~56
DOI : 10.9766/KIMST.2016.19.1.050
This paper is about the implementation of the OFDM-based border guard/reconnaissance communication terminal systems. We have implemented Real-time Dynamic DL/UL symbol rate control function using the DL-MAP message, and proposed error detection method caused by malfunctioning and timing optimization method. The proposed scheme detects the variable rate symbol decoding timing without increasing additional physical layer logic, and also provides a wide variety of DL/UL data transfer rate. Furthermore, the proposed scheme applies to the current border guard/reconnaissance equipment and confirms a operation performance through field tests and demonstration at home and abroad.
Fuzzy Rule-Based Method for Air Threat Evaluation
Choi, Byeong Ju ; Kim, Ji Eun ; Kim, Jin Soo ; Kim, Chang Ouk ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 57~65
DOI : 10.9766/KIMST.2016.19.1.057
Threat evaluation is a process to estimate the threat score which enemy aerial threat poses to defended assets. The objective of threat evaluation is concerned with making an engagement priority list for optimal weapon allocation. Traditionally, the threat evaluation of massive air threats has been carried out by air defence experts, but the human decision making is less effective in real aerial attack situations with massive enemy fighters. Therefore, automation to enhance the speed and efficiency of the human operation is required. The automatic threat evaluation by air defense experts who will perform multi-variable judgment needs formal models to accurately quantify their linguistic evaluation of threat level. In this paper we propose a threat evaluation model by using a fuzzy rule-based inference method. Fuzzy inference is an appropriate method for quantifying threat level and integrating various threat attribute information. The performance of the model has been tested with a simulation that reflected real air threat situation and it has been verified that the proposed model was better than two conventional threat evaluation models.
Camera Identification of DIBR-based Stereoscopic Image using Sensor Pattern Noise
Lee, Jun-Hee ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 66~75
DOI : 10.9766/KIMST.2016.19.1.066
Stereoscopic image generated by depth image-based rendering(DIBR) for surveillance robot and camera is appropriate in a low bandwidth network. The image is very important data for the decision-making of a commander and thus its integrity has to be guaranteed. One of the methods used to detect manipulation is to check if the stereoscopic image is taken from the original camera. Sensor pattern noise(SPN) used widely for camera identification cannot be directly applied to a stereoscopic image due to the stereo warping in DIBR. To solve this problem, we find out a shifted object in the stereoscopic image and relocate the object to its orignal location in the center image. Then the similarity between SPNs extracted from the stereoscopic image and the original camera is measured only for the object area. Thus we can determine the source of the camera that was used.
A Case Study on Design Verification for Supportability of Weapon System Based on Virtual Reality
Kim, Heewook ; Lee, Hakpyo ; Lee, Seungyong ; Kang, Sungoug ; Heo, Gilhwan ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 76~83
DOI : 10.9766/KIMST.2016.19.1.076
State-of-the-art design S/W and other 3D systems are used for design and development of weapon system. It is possible to detect problems of design through 3D or VR(Virtual Reality) in advance, and then reduce the development cost by finding solutions before prototype production. Therefore, we can increase efficiency for supportability of weapon system. In this study, we first propose a design verification procedure. Then we verify design of weapon system, underwater guided weapon, as a case study. Finally, we suggest alternatives for underwater guided weapon under development with DMS(Digital Maintenance System) and ICIDO from the point of view of ILS(Integrated Logistics Support). Developed S/W, DMS, draws maintenance procedures for components. Commercial S/W, ICIDO, verifies cable maintainability.
A Study on V-C Interoperability Test and Methodology of V-C Interoperation Analysis for Next Generation Maritime Warfighting Experimentation Systems
Shin, Hyunsoo ; Kim, Junghoon ; Choi, Bongwan ; Yim, Dongsoon ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 84~94
DOI : 10.9766/KIMST.2016.19.1.084
The warfighting experimentation is the most important for the weapon acquisition process because the warfighting experimentation shall support the operation effectiveness as well as acquisition logicality. Therefore, ROK Navy is starting to set up the next generation warfighting experimentation systems. According to literature studies, there have been many studies regarding the interoperability of Simulators(Virtual) and Exercising models(Constructive), but not for studies regarding interoperability between Simulators(Virtual) and Analysis models(Constructive) that is the core component of next generation maritime warfighting experimentation systems. This study is dealing with the V-C(Analysis model) interoperability test and methodology of interoperation analysis. The purpose of the study is to provide the new analysis methodology through V-C(Analysis model) interoperation, which can be applied for the concept of operations(CONOPS) of next generation maritime warfighting experimentation systems. In addition to that, the study validates the suggested analysis methodology by the case study of a naval operation.
Fitting Coefficient Setting Method for the Modified Point Mass Trajectory Model Using CMA-ES
An, Seil ; Lee, Kyo Bok ; Kang, Tae Hyung ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 95~104
DOI : 10.9766/KIMST.2016.19.1.095
To make a firing table of artillery with trajectory simulation, a precise trajectory model which corresponds with real firing test is required. Recent 4-DOF modified point mass trajectory model is considered accurate as a theoretical model, but fitting coefficients are used in calculation to match with real firing test results. In this paper, modified point mass trajectory model is presented and method of setting ballistic coefficient is introduced by applying optimization algorithms. After comparing two different algorithms, Particle Swarm Optimization and Covariance Matrix Adaptation - Evolutionary Strategy, we found that using CMA-ES algorithm gives fine optimization result. This fitting coefficient setting method can be used to make trajectory simulation which is required for development of new projectiles in the future.
A Study on Development direction of Next-generation Naval Combat System Architecture
Hwang, Kwangyong ; Ok, Kyoungchan ; Kim, Youngjin ; Choi, Bongwan ; Oh, Hyunseung ; Choi, KwanSeon ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 105~118
DOI : 10.9766/KIMST.2016.19.1.105
A naval combat system is the system of systems who supports naval indigenous operations by integrating and inter-operating many different kind of weapons, which has characteristics of large scale complex computing system. ROK Navy has been built a blue ocean navy, so that large scale warships are under constructions. However, warship combat system architecture has not been well studied so far in Korea. The paper focuses on current combat system architecture and propose the next generation combat system architecture, which will give the development direction of ROK Navy. In order to complete combat system architecture studies, the system engineering process shall be applied to the study. Moreover, ARENA simulation tool is used for verification of combat system architecture. The system engineering process is as follows: next-generation naval combat system requirement analysis, functional architecture analysis and physical architecture analysis.
A Case Study on the FDA Approval of Medical Treatments against Nerve Agent Poisoning
Lee, Keunwoo ; An, Seoyeon ; Hur, Byungil ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 119~126
DOI : 10.9766/KIMST.2016.19.1.119
The US Army used MARK-1 composed of atropine autoinjector and 2-PAM autoinjector as a medical countermeasure against nerve agent poisoning. Recently, it has been being replaced by the ATNAA(Antidote Treatment Nerve Agent AutoInjector) for improvement the convenience in use and rapid detoxification effect. ATNAA(FDA approval, NDA 21-175, 2002. 1. 17) is a multi-chambered autoinjector that sequentially delivers atropine and 2-PAM through a single needle to allow Warfighters to survive against lethal exposure to nerve agents. In this paper, our group investigated the case of FDA approval of ATNAA in a point of the various data required by FDA guideline, thereby making it easy to meet the KFDA guideline for the approval of the prototype our group has been developed. The purpose of this study is to provide a reference for efficient research activities to minimize time and cost. Additionally, the purpose of this study is to provide a reference for the planning for the development of similar drug.
Review on TNT Disposal
Park, Jae Hyun ; Shin, Won Mo ; Lee, Jae W. ;
Journal of the Korea Institute of Military Science and Technology, volume 19, issue 1, 2016, Pages 127~143
DOI : 10.9766/KIMST.2016.19.1.127
Over the decades, TNT has been produced indiscriminately to be utilized in many fields owing to its ability to manipulate the explosion. Yet, the proper technique for disposal of TNT and the waste residues had not been developed so that the large amount of TNT waste was being piled up. Upon the agreement to demilitarization of old weapon, a study on the disposal methods for TNT and the waste treatment have been raised for their dangerous nature. Since then, from burying in landfill to utilizing supercritical fluid-based oxidation, a lot of research is actively ongoing, but little progress has been made in Korea compared to developed countries. This review paper covers all the technologies developed for TNT and its waste disposal including the concept, advantage, and disadvantage of those technologies. Also, suggested here are the future research directions.