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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
A Dynamic Analysis on the Latch of Soft Recoil System
Woo, Dae-Hyun ; Lee, Young-Shin ; Kim, Heung-Tae ; Jun, Sang-Bae ; Lee, Kyu-Sub ; Kang, Kuk-Jeong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 359~365
DOI : 10.9766/KIMST.2012.15.4.359
In the soft recoil system, the recoiling parts are initially accelerated to the forward direction. These parts are returned to original position by the firing with intial acceleration speed. The latch of the soft recoil system keeps the high impact load when the recoil parts were recuperated to the forward direction. In this study, the latch of soft recoil system using the ADAMS program was analyzed. The optimal operation parameters were found that max. angle and expansion length of latch was
, 180 mm respectively. Dynamic structural analyses of model cases were performed using finite element model. The max. stress and deflection of latch was 230 MPa and 0.45 mm respectively.
Design of the Electro-magnetic Compatibility(EMC) for Hybrid Electric Propulsion System
Lim, Jong-Kwang ; Chang, Kyo-Gun ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 366~373
DOI : 10.9766/KIMST.2012.15.4.366
In this paper, serious changes in the electromagnetic environment with increasing power and energy capabilities for electric driving and military mission are discussed. Design and control strategies on the Electro-Magnetic Compatibility(EMC) for the series hybrid electric vehicle are proposed to minimize the effects of electromagnetic interferences.
A Study on Methods of Measuring and Compensating Misalignment between Inertial Sensor Body and Housing Frame
Yu, Hae-Sung ; Kim, Tae-Hoon ; Kim, Cheon-Joong ; Lee, Youn-Seon ; Park, Heung-Won ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 374~380
DOI : 10.9766/KIMST.2012.15.4.374
In guided missile systems, reducing terminal-position error is the primary objective of the inertial navigation system. As a seeker is used to sense and track a target, the critical function of the inertial navigation system is to provide the seeker with accurate missile attitude information and help the seeker to keep tracking a target continuously. As inertial sensor body and missile body alignment errors are taken into account, it is desirable to minimize the alignment errors between the missile seeker and the attitude of inertial navigation system. Among the alignment errors, this paper addresses the methods of measuring and compensating misalignment between inertial sensor body and housing frame and shows test results of several experiments.
Development of Information Model based Integrated Management and Monitoring System for Naval Ship Combat System with Heterogeneous Distributed Environments
Min, Bup-Ki ; Kim, Hyeon-Soo ; Kuk, Seung-Hak ; Kim, Chum-Su ; Han, Woong-Gie ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 381~389
DOI : 10.9766/KIMST.2012.15.4.381
In the existing naval combat system, integrated management is done based on subsystems that make up the system. The naval combat system, however, is a large-scale distributed system made up of subsystems of diverse heterogeneous environments. Although each of the subsystems can be easily managed because they are on the same platform, it is extremely difficult to integrate and manage as a single entity all subsystems that make up the naval combat system because the heterogeneous environments and distributed systems have to be taken into account. In fact, there hasn`t been a technique available to integrate and manage subsystems that make up the naval combat system, until now. In this paper, the architecture of an integrated management system is designed and implemented to provide the user with various services. Furthermore, a system that can manage subsystems of the naval combat system in an integrated way is developed.
A Comparative Study on Exciting Force for Luminaire of Naval Vessels According to Sailing Condition
Park, Mi-You ; Cho, Heung-Gi ; Lee, Kowan-Woo ; Yu, Young-Soo ; Cho, Kyu-Lyong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 390~397
DOI : 10.9766/KIMST.2012.15.4.390
According to sailing condition, an exciting force for luminairie of naval vessels was measured and analyzed. A naval combat service support boat and P
(patrol killer guided missile) were selected as a target naval vessel. Due to their small size and fast speed, they received excessive vibration than other bigger naval vessels like destroyer. The vibration of luminairie was measured on their cruising and maximum speed. This could analyze exciting force for luminairie of naval vessels. Using this analyzed data, the validity of military standard for naval vessel was verified.
A Study on the Analysis of the Rebounding Force using the 1-DOF Model
Yi, Jong-Ju ; Kim, Chwa-Il ; Kim, Jae-Ho ; Ham, Il-Bae ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 398~403
DOI : 10.9766/KIMST.2012.15.4.398
This paper describes about the analysis of firing rebounding force exerted on the launching system supporting structure. The measured high pressure data at the launching tube is used as external force. The maximum firing rebounding force was occurred when the snubber of inner structure contacts the surface of wall in launching tube.
The Study of a Suitable for TMA Filter Architecture for the Submarine with Multiple Sensors
Lim, Young-Taek ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 404~409
DOI : 10.9766/KIMST.2012.15.4.404
In order to detect and track target, submarine gather the target information(bearing, range, frequency and so on) with using multiple sensors. And submarine can estimate target states with target information. In this paper, we suggest the target motion analysis(TMA) filter architecture of submarine and the proposed TMA filter architecture is tested by a series of computer simulation runs and the results are analyzed and verified.
A Study of Simulation Model for Effectiveness Analysis Simulation of Unmaned Underwater Vehicle for Mine Searching
Hwang, A-Rom ; Kim, Moon-Hwan ; Lee, Sim-Yong ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 410~416
DOI : 10.9766/KIMST.2012.15.4.410
In recent years, unmanned underwater vehicles(UUVs) have emerged as viable technical solution for conducting underwater search, surveillance, and clearance operations in support of mine countermeasure missions(MCMs) because of her autonomy and long time endurance capability. It is necessary for UUV for MCM system design to define system specification from various configuration alternatives. This paper introduces a simulation model for mine countermeasure mission effectiveness analysis and presents some simulation results under various tide conditions for validation of the proposed simulation model.
An Estimation of RCS through Configuring Element Analysis
Kwon, T.J. ; Shin, Bo-Hyun ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 417~423
DOI : 10.9766/KIMST.2012.15.4.417
Radar Cross Section(RCS) is a measure of how detectable an object is with a radar. A larger RCS indicates that an object is more easily detected. Informally, the RCS of an object is the cross-sectional area of a perfectly reflecting sphere that would produce the same amount of reflection strength as the object in question would. In order to estimate RCS of aircraft weapons the external surface is modeled as a collection of simple shape elements. And the overall RCS is estimated as a vector sum of configuring elements` cross-sections which are well known given by analytic formulae. A RCS estimation code is developed for a typical shape of Air-To-Surface bombs and missiles. Size of weapons and location of fins are implemented in the code in addition to the presence of canards. The ability to predict radar return from flying vehicles becomes a critical technology issue in the development of stealth configurations. This simplified method of RCS estimation is known to be fast and accurate enough in an optical region of high frequency incident radio wave.
Path Planning of the Low Altitude Flight Unmanned Aerial Vehicle for the Neutralization of the Enemy Firepower
Yang, Kwang-Jin ; Kim, Si-Tai ; Jung, Dae-Han ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 424~434
DOI : 10.9766/KIMST.2012.15.4.424
This paper presents a path planning algorithm of the unmanned aerial vehicle for the neutralization of the enemy firepower. The long range firepower of the ememy is usually located at the rear side of the mountain which is difficult to bomb. The path planner not only consider the differential constraints of the Unmanned Aerial Vehicle (UAV) but also consider the final approaching angle constraint. This problem is easily solved by incorporating the analytical upper bounded continuous curvature path smoothing algorithm into the Rapidly Exploring Random Tree (RRT) planner. The proposed algorithm can build a feasible path satisfying the kinematic constraints of the UAV on the fly. In addition, the curvatures of the path are continuous over the whole path. Simulation results show that the proposed algorithm can generate a feasible path of the UAV for the bombing mission regardless of the posture of the tunnel.
Effect Analysis of Sample Size and Sampling Periods on Accuracy of Reliability Estimation Methods for One-shot Systems using Multiple Comparisons
Son, Young-Kap ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 435~441
DOI : 10.9766/KIMST.2012.15.4.435
This paper provides simulation-based results of effect analysis of sample size and sampling periods on accuracy of reliability estimation methods using multiple comparisons with analysis of variance. Sum of squared errors in estimated reliability measures were evaluated through applying seven estimation methods for one-shot systems to simulated quantal-response data. Analysis of variance was implemented to investigate change in these errors according to variations of sample size and sampling periods for each estimation method, and then the effect analysis on accuracy in reliability estimation was performed using multiple comparisons based on sample size and sampling periods. An efficient way to allocate both sample size and sampling periods for reliability estimation tests of one-shot systems is proposed in this paper from the effect analysis results.
A Model to Calculate the Optimal Level of the Cognitive Radiotelegraph
Kim, Young-Mook ; Choi, Kyung-Hwan ; Yoon, Bong-Kyoo ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 442~449
DOI : 10.9766/KIMST.2012.15.4.442
Cognitive Radio(CR) is the technology that allocates the frequency by using dynamic spectrum access. We proposed a model to calculate the optimal level of the cognitive radiotelegraph, where secondary users opportunistically share the spectrum with primary users through the spectrum sensing. When secondary user with cognitive radio detects the arrival of a primary user in its current channel, the secondary user moves to the idle channel or be placed in the virtual queue. We assume that the primary users have finite buffers and the population of secondary users is finite. Using a two-dimensional Makov model with preemptive priority queueing, we could derive the blocking and waiting probability as well as the optimal level of cognitive radiotelegraph under a various range of parameter circumstances.
A Study on Low Phase Noise Frequency Synthesizer Design with Compact Size for High Frequency Band
Kim, Tae-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 450~457
DOI : 10.9766/KIMST.2012.15.4.450
In this paper, we designed low phase noise frequency synthesizer with compact size for High frequency band (Ku-band). The paper addresses merits and demerits of single loop and dual loop frequency synthesizer. The phase noise characteristics of the phase-locked loop frequency synthesizer were predicted based on the analysis for phase noise contribution of noise sources. The proposed model in this paper more accurately predicts the low phase noise frequency synthesizer with compact size for high frequency band.
A Weapon Effectiveness Evaluation Model for Top-Attack Smart Munitions
Kang, Min-Ah ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 458~466
DOI : 10.9766/KIMST.2012.15.4.458
We have developed a weapon effectiveness evaluation model for top-attack smart munitions(WEEM/TASM), which is a many on many Monte Carlo Model evaluating the effectiveness of top-attack smart munitions against armoured ground vehicles. In this model the battle is reduced to a one-sided battle situation in that the target vehicles are regarded as being stationary and passive. It can simulate the whole attack process of smart munitions from firing artillery dispenser to sensing and hitting processes after dispense. It can also calculate the probability of kill of each target and the numbers of rounds required to fulfill the degree of damage in statistical manners. In this paper, we describe the basis for our design concepts reflected in the model to simulate the weapon effectiveness of top-attack smart munitions and provide simulation results for an example case.
A Research on the Korea Interoperability Management Model Independent of Interoperability Levels
Cheon, Jae-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 467~474
DOI : 10.9766/KIMST.2012.15.4.467
One of the interoperability management activity in Korean military is interoperability level assessment. The concept of interoperability levels causes the assessed result to be uncertain and unreliable, despite the activity contributes to secure interoperability requirements of systems consistently. In this paper, I suggest Korea Interoperability Management(KIM) model which is independent of interoperability levels especially specified in LISI model, in order to support more practical and reliable interoperability management.
Present Status of Green Solvents
Lee, Jun-Wung ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 475~491
DOI : 10.9766/KIMST.2012.15.4.475
Green Chemistry emerged at the end of 20th century, which aims the development of the technologies for the sustainable society at the molecular level. Most products we consume in everyday life are produced through chemical processes, and we often oversee the fact that huge amount of solvents are used and disposed. At the present time most solvents used in laboratories as well as industries are volatile organic compounds(VOC), which gives health and environmental problems. Therefore scientists are seeking new materials which have equivalent properties of VOCs as solvent, and at the same time gives no health and environmental problems. In this brief review, the author describes the present status of research and development activities of green solvent materials throughout research societies worldwide. At present the most attractive green solvent candidates are water, glycerol, supercritical carbon dioxide and ionic liquids. In order to give the pictures of these materials, the author tried to introduce the overall aspects of green solvents in various chemical reaction as well as catalytic roles.
Status of the Recent Applications of Carbon Fiber
Lee, Tae-Ho ; Kil, Sang-Cheol ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 492~501
DOI : 10.9766/KIMST.2012.15.4.492
In this paper, the status of the recent applications of carbon fiber was investigated through the published papers, informations or data of the internet etc. The production cost of the carbon fiber will be lowered and in the other hand the quality would be upgraded. Therefore in the automobile area, the use of the carbon fiber will be increased, specially for the high quality cars and the sports cars. Also the structures, wings and many secondary parts of the commercial airplanes will be made of carbon fibers more and more. The carbon fiber applications are extended to many fields including ship buildings like as boats, canoes and retrofitting in civil engineering, sporting goods, instruments etc.
The Preferred Orientation of CdSe and CdS Thin Films on the AlO
Lee, Young-Gun ; Chang, Ki-Seog ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 502~506
DOI : 10.9766/KIMST.2012.15.4.502
In order to find the structural characteristics of the thin films of group II-VI semiconductor compounds compared with those of powder materials, films were made of 4 powders of ZnS, CdS, CdSe, and CdTe(Aldrich), each with 99.99 % purity. For the ZnS/CdS multi-layers, the ZnS layer was coated over the CdS layer on an
membrane, which served as a protective layer within a vacuum at the average speed of 1
/sec. After studying the structures of the group II-VI semiconductor thin films by using X-ray spectroscopy, we found that the ZnS, ZnS/CdS, CdS, and CdSe films were hexagonal and exhibited some degree of preferred orientation. Also, the particles of the thin films of II-VI semiconductor compounds proved to be more homogeneous in size compared to those of the powder materials. These results were further verified through scanning electron microscopy(SEM), EDX analysis, and powder and thin film X-ray diffraction.
Laboratory Test Method for the Forward Motion Compensation of Airborne Camera
Song, Dae-Buem ; Yoon, Yong-Eun ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 507~512
DOI : 10.9766/KIMST.2012.15.4.507
Image blurring in airborne camera can be prevented through timely actuation of LOS(Line of Sight) into the opposite direction to the aircraft advancement, i.e. FMC(Forward motion compensation). Performance verification of FMC requires installation of camera to the aircraft. However, in many ways the verification process has little choice but to be implemented in the laboratory. In this paper verification method of FMC performance in the laboratory is introduced. With collimator target installed in the known reference position image obtained by actual mission plan naturally displays image blurring as well as LOS displacement by FMC effect. Through comparison of the amount of those image blurring and LOS displacement to the equivalent image distortion expected by the application of the FMC reference command can the performance be verified. In this paper we propose a new verification method of FMC performance in laboratory along with generalized solution of FMC reference command, and assess the validity of our proposition.
A Method of Fast Track Merging for Multi-Target Tracking under Heavy Clutter Environment
Lee, Seung-Youn ; Yoon, Joo-Hong ; Lee, Seok-Jae ; Jung, Young-Hun ; Choe, Tok-Son ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 513~518
DOI : 10.9766/KIMST.2012.15.4.513
In this paper, we proposed a method of fast track merging which is the foundation of track to track association technique. The existing method of track merging is performed throughout comparison between tracks to tracks. Therefore, it has heavy calculation time. In our research, we developed a method for fast clustering by using nearest neighbor measurement identification. The simulation results show that the proposed method is more faster than previous method about 3.3%. We expect that this method could be effectively used in multi-target tracking particularly in heavy clutter environment.
A Study on Performance Characteristics of Ti-Zr Type Metal Hydrides and Hydrogen Storage Cylinders with the Hydrides
Kim, Ki-Youl ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 519~526
DOI : 10.9766/KIMST.2012.15.4.519
Recently fuel cell is considered to be a new technology that can substitute the ICE(Internal Combustion Engine) as well as overcome environmental issues. In military applications, fuel cell has an unique advantages, which are quietness, namely, stealth. The environmental requirement such as shock and vibration in military application, however, is very severe comparing to civilian demand. Especially, the safety concerning hydrogen storage is the most important problem. Among the candidate methods to store hydrogen, the metal hydride storage is promising method owing to the storage mechanism of chemical absorption of hydrogen to metal hydrides. In this study, the new composition of Ti-Zr type metal hydride(A composition) was suggested and investigated to increase the hydrogen storage capacity. For comparison, the hydrogen charge-discharge properties were investigated with the commercialized Ti-Zr type metal hydride(B composition) using PCT(Pressure-Composition-Temperature) measurement. Also two hydrogen storage cylinders were loaded with each metal hydride and their hydrogen charging and discharging characteristics were investigated. As a result, it was found that the new Ti-Zr type metal hydride has a slightly higher hydrogen storage capacity compared to commercial Ti-Zr type metal hydride.
A Study on the Thermal Deformation of Current Collectors by Burning Heat Pellets in Thermal Batteries
Ji, Hyun-Jin ; Kim, Jong-Myong ; Kim, Young-Chul ; Cho, Sung-Baek ;
Journal of the Korea Institute of Military Science and Technology, volume 15, issue 4, 2012, Pages 527~534
DOI : 10.9766/KIMST.2012.15.4.527
Thermal batteries are primary batteries that use molten salts as an electrolyte and employ an internal pyrotechnic source to heat the battery stack to operating temperatures, typically between 450 and
. The unit cell of thermal batteries consists of an anode, an electrolyte, a cathode, a heat pellet and a current collector. The heat source for such batteries is typically heat pellets based on
. The elevated temperature by combustion of heat pellet is supposed to cause a flatness non-uniformity, buckling, with a lateral extension diameter of current collector. This paper mainly focused on the combustion and buckling model of current collector to simulate the effect of heat source. Mechanical stresses in the current collector caused by thermal stress is a critical design consideration of thermal batteries because the internal short circuit could be occurred.