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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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Journal DOI :
The Korea Institute of Military Science and Technology
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Volume & Issues
Volume 15, Issue 6 - Dec 2012
Volume 15, Issue 5 - Oct 2012
Volume 15, Issue 4 - Aug 2012
Volume 15, Issue 3 - Jun 2012
Volume 15, Issue 2 - Apr 2012
Volume 15, Issue 1 - Feb 2012
Selecting the target year
The Development of Small-sized Launchable Robot for Reconnaissance
Lee, Seung-Ho ; Jung, Won-Suk ; Lee, Min-Gu ; Park, Ji-Hyuk ; Park, Hyun-Soo ; Yoo, Kyu-Jae ; Kim, Soo-Hyun ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 535~542
DOI : 10.9766/KIMST.2012.15.5.535
Recently, the study on small-sized reconnaissance robot has been progressed through grafting robot technology to military fields for minimizing the casualties. Especially, throwable robots have been focusing for their's efficiency in anti-terror operation. However, it is impossible to launch throwable robot to long range(approximately 100m) by hand. So we need another type of robots, so called launchable robots, which can launch farther and is more accurate by launcher. In this paper, we presented the process of developments of launchable robots('launchbot') which are available for remote launch from collection of user's opinions to field test. Based on the opinions of users, we established the goal of development, designed and manufactured the robots. Through the field test, we found that our launchable robot satisfied the performance requirements.
Research on Application of Functional Safety for Developing Combat Hybrid Electric Vehicles
Chang, Kyogun ; Lee, Yoon Bok ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 543~549
DOI : 10.9766/KIMST.2012.15.5.543
Hybrid electric propulsion systems are expected as future primary combat platforms because the systems can supply enough electric power, easily locate components inside vehicles, and maneuver without undesired noise. However, increasing electric/electronic/software usage causes abnormal failure patterns which have not been noticeable in conventional automotive. Recently, the functional safety standard for road vehicles were enacted and vehicle manufacturers request their components which satisfy standardized quality. This research analyzes functional safety standards(IEC 61508 and ISO 26262) and compares the standards for road vehicles with military standards of system safety. Strategies to apply functional safety in the combat hybrid electric vehicle are scrutinized.
An Analysis on the Protection Mechanism of Some Inert Reactive Cassettes
Joo, Jae-Hyun ; Choi, Joon-Hong ; Lee, Heon-Joo ; Lee, Chang-Hyun ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 550~556
DOI : 10.9766/KIMST.2012.15.5.550
In this study, a series of ballistic experiments have been performed to investigate the protection mechanism of some inert reactive cassettes against shaped charge jet. Three kinds of material were tested as a core material of the inert cassettes, i.e. one of rubber materials, a high modulus and high strength composite material used for ballistic protection and a mixture of energetic materials. Parameters such as deformation of the cassettes, occurrence time of jet distortion, leading jet length and residual penetration depth were investigated from the experiments and they were compared to each other quantitatively according to the jet incidence angles. The results show that the increment of cassette deformation caused jet distortion to occur early and jet distortion brought decrease of the length of leading jet. Then the decrease of the length of leading jet accompanied the decrease of residual penetration depth.
UGV Localization using Multi-sensor Fusion based on Federated Filter in Outdoor Environments
Choi, Ji-Hoon ; Park, Yong Woon ; Joo, Sang Hyeon ; Shim, Seong Dae ; Min, Ji Hong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 557~564
DOI : 10.9766/KIMST.2012.15.5.557
This paper presents UGV localization using multi-sensor fusion based on federated filter in outdoor environments. The conventional GPS/INS integrated system does not guarantee the robustness of localization because GPS is vulnerable to external disturbances. In many environments, however, vision system is very efficient because there are many features compared to the open space and these features can provide much information for UGV localization. Thus, this paper uses the scene matching and pose estimation based vision navigation, magnetic compass and odometer to cope with the GPS-denied environments. NR-mode federated filter is used for system safety. The experiment results with a predefined path demonstrate enhancement of the robustness and accuracy of localization in outdoor environments.
A Study on Developing the Acquisition Unit Cost Estimating Model of the Guided Weapon System
Kim, Yonghyun ; Lee, Yongbok ; Jung, Wonil ; Kim, Dongkyu ; Kang, Sungjin ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 565~576
DOI : 10.9766/KIMST.2012.15.5.565
Cost estimates are necessary for government acquisition program to support decisions about funding, to develop annual budget requests and to validate resource requirements at key decision points. Many researches have been done about cost estimating technique recently. Parametric cost estimating models based on CERs(Cost Estimating Relationships) have been mainly used using regression method with historical data. However, there are many restrictions in developing Korean version CERs because the number of data points are too small. Specially, data collection and data management system are unstable in Korean defense environment, when developing CERs. In this research, we analyzed the historical data, and found some cost drivers in guided weapon system area. We developed the Acquisition Unit Cost CER using the regression to remove multicollinearity in the historical data. So we could overcome the restriction of the insufficient sample number. This research as a first attempt is meaningful in terms of obtaining our own Acquisition Unit Cost CER using historical cost and physical characteristic in Korean development environment.
A Study on The Standard Process of Battle Experiment of the Maritime Weapon Systems Based on the M&S
Baek, Sang-Hoon ; Hur, Jung-Haeng ; Lee, Dong-Hoon ; Choi, Bong-Wan ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 577~585
DOI : 10.9766/KIMST.2012.15.5.577
Modeling & simulation-based battle experiments(BEx) is being used extensively as an efficient, scientific and rational verification methodology for maritime weapon system acquisition. However, research of definition and concept of BEx and standardized rules and process for the BEx are insufficient in recent military field of BEx. In this study, we discussed the definition and process of BEx based on the role of MND(including JCS), Navy and ADD and proposed the standardized process of BEx for maritime weapon system. Secondly suggested a evaluation methods of modeling and simulation-based BEx with MOP, MOF, MOE in linkage of engineering, engagement, mission and constructive model. Finally presented validate result that applied to the Torpedo using standardized process based on our proposed methodology.
A Study on Operational Method of a HMS
Shin, Seoung Chul ; Lee, Chul Mok ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 586~593
DOI : 10.9766/KIMST.2012.15.5.586
The Navy is in the process of developing a sonar-operation strategy to increase the effectiveness of underwater target searching capability. HMS is the basic strategy to detect underwater targets. The advantages of HMS is that, it has a short preparation time to operate and can be always used regardless of sea conditions and weather. However, it is difficult to effectively detect underwater targets due to the interaction between marine environments and sonar-operations. During the research, the effectiveness of the HMS system's underwater target searching capability was analyzed by integrating various search and defense patterns, and environment conditions into the simulation. In the simulation the ship search an evasive target within a set region. The simulation presented results for an effective searching and defense methods of underwater targets. These research results can be used as foundation for advancing and improving the sonar operational tactics.
Analysis of the Dynamic Characteristics of the Underwater Discharge System using a Centrifugal Pump
Jung, Chan-Hee ; Park, In-Ki ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 594~600
DOI : 10.9766/KIMST.2012.15.5.594
In this study, the mathematical model of the underwater discharge system using a centrifugal pump was derived and the rotating speed profiles of the pump which satisfied the discharge performance requirements were obtained through the underwater discharge simulations. The simulation results showed that the dynamic characteristics of a projectile were greatly affected by the rotational speed of the pump, however, hardly by the discharge depth. It is anticipated that the simulation model can be used to derive the design parameters and analyze the performance concerning the underwater discharge system using a centrifugal pump.
Measure of Effectiveness for Detection and Cumulative Detection Probability
Cho, Jung-Hong ; Kim, Jea Soo ; Lim, Jun-Seok ; Park, Ji-Sung ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 601~614
DOI : 10.9766/KIMST.2012.15.5.601
Since the optimized use of sonar systems available for detection is a very practical problem for a given ocean environment, the measure of mission achievability is needed for operating the sonar system efficiently. In this paper, a theory on Measure Of Effectiveness(MOE) for specific mission such as detection is described as the measure of mission achievability, and a recursive Cumulative Detection Probability(CDP) algorithm is found to be most efficient from comparing three CDP algorithms for discrete glimpses search to reduce computation time and memory for complicated scenarios. The three CDPs which are MOE for sonar-maneuver pattern are calculated as time evolves for comparison, based on three different formula depending on the assumptions as follows; dependent or independent glimpses, unimodal or non-unimodal distribution of Probability of Detection(PD) as a function of observation time interval for detection. The proposed CDP algorithm which is made from unimodal formula is verified and applied to OASPP(Optimal Acoustic Search Path Planning) with complicated scenarios.
Test & Evaluation of Airborne Communication, Navigation, Identification Equipment
Kim, Sung Woo ; Kim, Min Su ; Lee, Young Sik ; Lee, Byoung Hwa ; Oh, Woo Seop ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 615~622
DOI : 10.9766/KIMST.2012.15.5.615
Airborne radio communications, navigation, and identification equipments are the basic equipment of airplane. Airborne radio communications, navigation, and identification equipments are characterized by user's many quantitative and qualitative requirements. These equipment look like simple test and evaluation, but they have many complex factors. This paper describe the test and evaluation of airborne radio communications, navigation, and identification equipments.
Method for Position Estimation of Network Entry Terminal based on DTDMA(Dynamic Time Division Multiple Access)
Seo, Nan Sol ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 623~629
DOI : 10.9766/KIMST.2012.15.5.623
In this paper, we analysis the performance of position estimation when adopting Dynamic TDMA(DTDMA) in JTIDS RelNav. JTIDS RelNav is widely understood as a new navigation solution possibly capable to support or take cover of the role of conventional systems including INS or GPS no matter if they are working well or not. By maximizing the efficiency of radio resource management in MAC(Medium Access Control) layer we enhance the system performance without any replacement of hardware.
Optimal Sensor Placement in Multistatic Sonar
Lee, Kwang-Hee ; Han, Dong-Seog ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 630~634
DOI : 10.9766/KIMST.2012.15.5.630
It is very important to place receiver in multistatic sonar. Inefficient placement of the receiver reduce detection probability and to increase the probability of detection should be used more receivers. Therefore, detection of targets in searching area, detection performance of limited receiver depends on how to place. Through the optimized receiver placement, detection area between each sonar as much as possible avoid duplication, as optimization, the minimum receiver can be maintained detection performance. In this paper we prove mathematical verification of maximum signal excess value based on sonar placement and we calculate a signal excess value by using computer simulations and suggest optimal sonar placement.
A Study on Relay Enhancing Method of MIL-STD-188-220 using ACK Reply in CNR Network
Choi, Young-Min ; Sung, Bo Hyon ; Youn, Jong Taek ; Kim, Young-Ho ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 635~642
DOI : 10.9766/KIMST.2012.15.5.635
The Packet radio C2OTM(Command and Control On The Move) for Command, Control and situational awareness in communication environment of current Combat Net Radio Network is required in a relay transmission techniques. This is to assure the reliability of information transfer, and extend Wireless Coverage and overcome Communication obstacles of mountainous terrain. For the reliability of information transmission in tactical environment, Ad hoc Networking is necessary considering communication environment and an appropriate application of error correction. In this study, We propose a on-demand SDR algorithm that is currently being applied the FEC, Golay, Repetition Code. This enhanced relay transfer uses Ack Reply in tactical operating environment of MIL-STD-188-220 Protocol.
A Study on the Quantitative Method of Static Combat Effectiveness for Jet-Fighter Generation
Lim, Sang-Min ; Park, Jae-Chan ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 643~650
DOI : 10.9766/KIMST.2012.15.5.643
This paper presents quantitative method of static combat effectiveness to classify fighter aircraft generations. We have analyzed performance metrics of United States(US), United Kingdom(UK), Russia, France, Sweden' fighters to determine jet-fighter generation. Both nominal and continuous variables were defined and used to present current trend of combat effectiveness.
A Study on Target Operational Availability Setting for Warship based on OMS/MP and Similar Warship RAM Analysis
Ha, Sungchul ; Kim, Kyoungyong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 651~659
DOI : 10.9766/KIMST.2012.15.5.651
Target operational availability setting is the first step to setting up a goal which a weapon system development project have to achieve and doing RAM analysis during whole life of a weapon system. It is important as a key factor to doing RAM analysis in the early phase of weapon system development. This paper present a methodology to set a target operational availability for, especially, a warship when it develop. This methodology uses Operational Mode Summary/Mission Profile(OMS/MP) of the developing warship and RAM analysis results of similar warships to calculate wartime and peacetime target operational availability. It will be used in early phase of not only warship development but also army or aircraft weapon systems when these develop.
A Wartime·Peacetime OMS/MP Analysis Model for a Naval Ship and Case Study
Ha, Sungchul ; Kook, Jungho ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 660~666
DOI : 10.9766/KIMST.2012.15.5.660
The weapon system is getting more and more expensive, complex and smarter. Therefore, efficiently and effectively, it is important to operate the weapon system. OMS/MP is a document to quantify operational factors like as environment, mission, mode etc. It is important data to perform RAM analysis in early weapon development phase and operate better a weapon system. This paper present a process and framework of OMS/MP for a naval ship with a deep analysis of relevant domestic and abroad case studies. It propose OMS/MP analysis framework based on wartime scenario and mission area analysis. This result will contribute not only improvement for the availability of a naval ship but also enhancement of RAM analysis process.
The Vision of ROK Army Training System using M&S Technology
Han, Bong-Kyu ; Kim, Yeek-Hyun ; Kang, Jae Kyoung ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 667~675
DOI : 10.9766/KIMST.2012.15.5.667
Modern warfare has developed into a network based simultaneous and integrated warfare where operations elements are interconnected. Following such change in modern warfare, ROK Army has been making an effort to transform personnel-based military structure into technology-based advanced structure. Considering technological innovations and changes in characteristics of officers and men, ROK Army is developing scientific education and training system to provide demand-focused customized education. To support such transformation in education and training, ROK Army is constantly developing Army training system using advanced M&S technology. This paper describes ROK Army's education and training policy, and elaborates the current status of M&S training system using advanced M&S technology. This paper further discusses the future directions of M&S training system.
Multisensor Bias Estimation with Serial Fusion for Asynchronous Sensors
Kim, Hyoung Won ; Park, Hyo Dal ; Song, Taek Lyul ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 676~686
DOI : 10.9766/KIMST.2012.15.5.676
This paper presents a sensor bias estimation method with serial fusion for asynchronous multisensory systems. Serial fusion processes the sensor measurements in a first-come-first-serve basis and it plays an essential role in asynchronous fusion in practice. The proposed algorithm generates the bias measurements using fusion estimates and sensor measurements for bias estimation, and compensates the sensor biases in fusion tracks. A simulation study indicates that the proposed algorithm has the superior performance in bias estimation and accurate tracking.
Simulation and Performance Assessment of a Geiger-mode Imaging LADAR System
Kim, Seongjoon ; Lee, Impyeong ; Lee, Youngcheol ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 687~698
DOI : 10.9766/KIMST.2012.15.5.687
LADAR systems can rapidly acquire 3D point clouds by sampling the target surfaces using laser pulses. Such point clouds are widely used for diverse applications such as DSM/DTM generation, forest biomass estimation, target detection, wire avoidance and so on. Many kinds of LADAR systems have been developed with their respective purposes and applications. Particularly, Geiger mode imaging LADAR systems are increasingly utilized since they are energy efficient thank to extremely sensitive detectors incorporated into the systems. The purpose of this research is the performance assessment of a Geiger mode imaging LADAR system based on simulation with the real system parameters. We thus developed a simulation method of such a LADAR system by modeling its geometric, radiometric, optic and electronic aspects. Based on the simulation, we performed the performance assessment of a newly designed system to derive the outlier ratio and false alarm rate expected during its operation in almost real environment with reasonable system parameters. The proposed simulation and performance assessment method will be effectively utilized for system design and optimization, and test data generation.
A Study on the Decomposition of DFP using Cu(II)-Chitosan Complex
Kye, Young-Sik ; Chung, Woo Yong ; Kim, Dongwook ; Park, Yangki ; Song, Siuk ; Jeong, Keunhong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 699~704
DOI : 10.9766/KIMST.2012.15.5.699
In this study, we have proposed a novel decomposition agent composed of Cu(II) and soluble chitosan for organophosphorus chemical agents. Compared to the autohydrolysis, the soluble Cu(II)-Chitosan complex hydrolyzed DFP more effectively. Results show that soluble Cu(II)-Chitosan complex enhances the hydrolysis of DFP in 4~6 folds compared to the autohydrolysis of DFP in buffer solution. This study provides the possibility of using this soluble Cu(II)-Chitosan complex as the environmental friendly decomposition agent which can substitute current DS-2 decomposition agent.
Modeling of Metal Penetration Rate by a High Power Continuous Wave Laser
Shin, Wan-Soon ; Koh, Hae-Seog ; Park, Byung-Suh ; Kang, Eung-Cheol ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 705~711
DOI : 10.9766/KIMST.2012.15.5.705
The purpose of this study is to develop the model to estimate the penetration rate of metal under a high power continuous wave laser irradiation. To estimate it, an empirical modeling is more practical when the penetration phenomena of metal by laser irradiation is too complex to be analyzed by the numerical simulation. When several methods published earlier were applied to our results, we found out that their methods were not appropriate as the model. Therefore, we suggested the new empirical method considering effective intensity as a key variable. As a result, we confirmed that the new method was effective to model the penetration rate of SUS304 metal and expected that it could be available to other metals.
A Study of Failure Mechanism for Inclined Impact of PELE
Jo, Jong-Hyun ; Lee, Young-Shin ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 5, 2012, Pages 712~719
DOI : 10.9766/KIMST.2012.15.5.712
Penetrator with enhanced lateral effect(PELE) is a newconcept projectile, without dynamite and fuze. It consists of high-density jacket, closed at its rear end and filled with a low-density filling material. To study the explosion characteristics of PELE, by AUTODYN-3D code, the calculation models of projectile body and bullet target are established and the process of penetrating aluminum-2024 alloy target of PELE is simulated, and the scattering characteristics after penetrating aluminum-2024 alloy target of PELE are studied by different initial velocity. The explicit finite element analysis of PELE fragmentation was implemented with stochastic failure criterion in AUTODYN-3D code. As expansion of filling, the fragments were obtained velocities and dispersed laterally and further more enhancing the damage area largely. The number and shape of the PELE fragments were different depend on impact velocity and incidence angle of filling which fragment generated during penetration and lateral dispersion process.