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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Institute of Military Science and Technology
Journal Basic Information
Journal DOI :
The Korea Institute of Military Science and Technology
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Volume & Issues
Volume 9, Issue 4 - Dec 2006
Volume 9, Issue 3 - Sep 2006
Volume 9, Issue 2 - Jun 2006
Volume 9, Issue 1 - Mar 2006
Selecting the target year
A Study on the Bore-Sighting Automation for Small Arms Using the Image Processing
Yeo, Woon-Joo ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 5~11
This paper is launched to get an exact bore-sighting value in the process of assembling for a dual-barrel weapon. Image processing method with a CCD(Charged Coupled Device) camera is chosen for the error reduction of bore-sighting. The results of this method by using a CCD camera and the testing target method are described in this paper. After the performance of the dual-barrel weapon and that of the fire-control system in the dual barrel weapon system is confirmed, the bore-sighting which is a part of the process in the system assembly is accomplished. In this process, the position of the barrel is identified by using the testing target method that is an existing bore-sighting method. Then, the fixing line of the fire-control system is checked by a day-optical part. The precision of the bore-sighting is required within several mils, however the manual method using the naked eyes makes it worse. Therefore, a CCD camera is installed in the eyepieces. Next, we can get an image of the sighting and the center coordinate values of the laser-pointer from each barrel by image processing method. A required bore-sighting value is calculated from the eccentricity of the center coordinate. Finally, It can be applied to adopt this result in the assembling process of the dual-barrel weapon.
Analysis of the Estimation of the Deflection and Hit Probability of a Gun Barrel of Next Infantry Fighting Vehicle
Yoo, Sam-Hyeon ; Chung, Dong-Yoon ; Oh, Myoung-Ho ; Shin, Nae-Ho ; Nam, Suk-Hyun ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 12~19
A gun barrel of infantry fighting vehicle is supported like a type of cantilever. Temperature of a gun barrel is increased by heat transfer due to the combustion of propellant charge during the firing. Thus, the muzzle of a gun barrel is deflected in accordance with its temperature and the accuracy rate is decreased by deflection of the muzzle. In this study, deflection of a gun barrel is estimated by measuring its restoration rate because measuring the deflection rate is difficult due to the vibration of the gun barrel during the firing. In order to obtain the relations between deflection rate and restoration rate of the 40mm gun barrel of Next Infantry Fighting Vehicle(NIFV) under varying temperature, measurement of deflection rate and restoration rate is carried out using 5.56mm Remington rifle barrel. Effect of the estimated deflection rate of a gun barrel of NIFV on the hit probability is also analyzed.
Parallel Multi-Monitor Display of Flight Simulation Graphics Using Linux Cluster
Kim, Byoung-Soo ; Kim, Ki-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 20~24
In this paper, our research efforts and activities for displaying flight simulation graphics on multi-monitors connected to a Linux cluster is introduced. In this pilot system graphics rendering as well as view calculation including LOD implementation for each monitor is peformed on each sub-node computer connected to the monitor rather than using an expensive main server. The Linux cluster is constructed by combining general-purpose desktop computers, and MPI library Is used for communication between sub-nodes. It could be concluded from our experience that it is possible to construct a massive multi-monitor display system by adding to the cluster as many sub-node computers and monitors as possible with economic efficiency.
Development of the Distributed Real-time Simulation System Based on HLA and DEVS
Kim, Ho-Jeong ; Lee, Jae-Hyun ; Cho, Kil-Seok ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 25~32
Weapon systems composed of several subsystems execute various engagement missions in distributed combat environments in cooperation with a large number of subordinate/adjacent weapon systems as well as higher echelons through tactical data links. Such distributed weapon systems require distributed real-time simulation test beds to integrate and test their operational software, analyze their performance and effects of cooperated engagement, and validate their requirement specifications. These demands present significant challenges in terms of real-time constraints, time synchronization, complexity and development cost of an engagement simulation test bed, thus necessitate the use of high-performance distributed real-time simulation architectures, and modeling and simulation techniques. In this paper, in order to meet these demands, we presented a distributed real-time simulation system based on High Level Architecture(HLA) and Discrete Event System Specification(DEVS). We validated its performance by using it as a test bed for developing the Engagement Control System(ECS) of a surface-to-air missile system. The proposed technique can be employed to design a prototype or model of engagement-level distributed real-time simulation systems.
Performance Analysis of Omni-Directional Automatic Target Detection and Tracking for a Towed Array Passive Sonar System
Seo, Ik-Su ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 33~40
In towed array passive sonar system, sonar operators cannot detect and track the all targets simultaneously in the omni-directional area by just Operator Initiated Tracking(OIT). In this paper, omni-directional automatic target detection and tracking algorithm is described and optimize the parameters through ocean data to overcome the drawbacks of OITs. The algorithm is verified through sea trials with submarines.
A Position of a Anti-Air Weapon System for Fighting Ship's Self-Defence Effectiveness Enhancement
Hwang, Soo-Jin ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 41~47
Naval combat system is total management system integrating a ship and several weapon system functions. For the mission of a ship, naval combat system manages features and constraints of each weapon system. Proper treats of each weapon system's conditions guarantee effective performances of naval combat system. In this paper, the relationship of anti-air weapon system's on board position and self-defence effectiveness against anti-surface missiles is studied
A Technology on the GPS CRPA Pattern Control Using the I/Q Vector Modulator
Kim, Jun-O ; Bae, Jun-Seung ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 48~55
This paper describes the antenna based GPS anti-jamming technology called CRPA(Controlled Reception Pattern Antenna), which used
array elements. In this system, the main functions are the antenna complex weight control and the GPS digital I/Q VM(Vector Modulator). To update the VM's I/Q complex weights, the PC based DAC(Digital to Analog Converter) module was also used and the two analog output voltages were applied to the
array elements to synthesize the null pattern. In the study, we also simulated the
GPS array null patterns to compare the null depth with experimental results. The VM was also modified at the frequency of 1.575GHz for the GPS L1 and controlled by the PC based VM software.
Conceptual Design of a Ground Launcher System, Using ICDM - Integrated, Customer Driven, Conceptual Design Method
Lee, Jae-Ryul ; Park, Young-Won ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 56~65
It is well known and widely accepted that the conceptual design is the most influential step in the design process of a product or a system and that about 75% of the life cycle cost is committed as the results of this stage. The purpose of this paper is to present and demonstrate the step of ICDM(Integrated, Customer Driven, Conceptual Design Method) for the development of a ground launcher system, TEL(Transporter, Erector and Launcher). The results of the study show the effectiveness of the method during the conceptual design phase of new complex systems or high-tech products.
A Study on the Application of SARL Concept for Future Logistics Support System
Choi, Seok-Cheol ; Kim, Dong-Eok ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 66~76
Sense and Respond Logistics(SARL) is a transformational, network-centric, knowledge-driven concept that enables joint effects-based operations and provides precise, agile support. Sense and respond logistics relies upon highly adaptive, self-synchronizing, and dynamic physical and functional processes. It predicts, anticipates, and coordinates actions that provide competitive advantage across the full range of military operations. In this research paper, we considered the essential prerequisite to introduce the appropriate SARL concept for the future warfare environment into the military logistics support system and also provide the conceptual alternatives to actualize the introduction of SARL.
Application of Supercritical Fluid in Energetic Materials Processes
Song, Eun-Seok ; Kim, Hwa-Yong ; Kim, Hyoun-Soo ; Lee, Youn-Woo ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 77~87
Micro- or nano-size particles are required to improve the combustion efficiency and stability in the case of solid explosives and propellants. The micro-structural properties of an energetic material strongly influence the combustion and explosion behavior. However, the traditional size reduction techniques, including milling, are not suitable for production of ultra-fine size particles. As an alternative to the traditional techniques, various re-crystallization processes based on supercritical fluids have recently been proposed. Supercritical fluids are fluids at temperatures and pressures above their critical point. In principle, they do not give problems of solvent contamination as they are completely released from the solute when the decompression occurs. Rapid Expansion Supercritical Solutions(RESS) and Supercritical Anti-Solvent Process(GAS/SAS) are representatives of a nano-size particle formation process of energetic materials using supercritical fluids. In this work, various fine particle formation processes using supercritical fluids are discussed and the results are presented.
A Study on the Fabrication of the Composite Sabot for a Kinetic Energy Projectile
Choi, Jae-Ho ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 88~94
In order to substitute current aluminum sabot and to increase the penetration performance of the kinetic energy projectiles, the research and development program for composites sabot has been conducted. For carbon/epoxy composites sabot, unidirectional carbon fiber reinforced epoxy prepreg was chosen and thick sectioned composites preforms with the different fiber angles along the circumferential direction of sabot were prepared by compression molding under the careful processing conditions at
for 1hour with
curing pressure. The composites sabot demonstrated a weight reduction by approximately 30% than that of current aluminum sabot. The muzzle velocity of a kinetic energy projectile with composites sabot was measured to be about 63m/s higher than that with aluminum sabot. These results imply that the penetration performance is expected to be considerably increased when the composite sabot is applied to the kinetic energy projectiles.
A Study on the Performance Improvement in Sidelobe Suppression for Pulse Compression of LFM Signal
Shin, Jeong-Hoon ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 95~100
The pulse compression technique using Linear FM signal is commonly used for improving the performance of both the detection range and range resolution in radar system. In general, the compressed LFM waveform has relatively large sidelobe level which may prevent a target from being detected when strong jammer or clutter signal is near the target signal. In this paper, we propose a new weighting method which uses the square-root weight to suppress the sidelobe level. Typical applications are missile seekers and tracking radar systems where target tracking range is available prior to the signal processing. By computer simulation, we show that the performance of the proposed method is better than that of the conventional weighting methods in terms of sidelobe suppression.
A W-band Cassegrain Antenna of the Target Detecting Fuze Sensor
Jung, Myung-Suk ; Uhm, Won-Young ; Kim, Wan-Joo ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 101~108
This paper describes the design, fabrication, and measured results of a W-band Cassegrain antenna suitable for the target detecting fuze sensor. The Cassegrain antenna is designed using MATLAB and MWS of CST. We use the multi-mode horn antenna as a feeder. The measurement results are as follows: The gain is about 41dB; SLL is 17.7dB; 3dB beamwidth is about
in E-plane and
in H-plane. The magnitude of leakage signals is about 43.5mVpp when the fabricated antenna and the transceiver of the fuze sensor ire combined. As a result, the designed W-band Cassegrain antenna could be quite applicable to the target detecting fuze sensor.
Investigation of the Polarization Cross-Coupling in Fiber Coils Using White Light Michelson Interferometer
Jo, Min-Sik ; Do, Jae-Chul ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 109~115
The investigation of the polarization cross-coupling in fiber coils was made using white light Michelson interferometer. The white light interferometer has a light source of about 13nm spectral bandwidth and measurement resolution of less than -80dB. The measurement found that the 200m fiber coil has a polarization cross-coupling of about -64dB in average and -46dB in maximum.
A Design and Performance Analysis of the Fast Scan Digital-IF FFT Receiver for Spectrum Monitoring
Choi, Jun-Ho ; Nah, Sun-Phil ; Park, Cheol-Sun ; Yang, Jong-Won ; Park, Young-Mi ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 116~122
A fast scan digital-IF FFT receiver at the radio communication band is presented for spectrum monitoring applications. It is composed of three parts: RF front-end, fast LO board, and signal processing board. It has about 19GHz/s scan rate, multi frequency resolution from 10kHz to 2.5kHz, and high sensitivity of below -99dBm. The design and performance analysis of the digital-IF FFT receiver are presented.
Resource Recycling Technology for the PCP-treated Ammunition Box
Lee, Jong-Chol ; Choi, Soo ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 123~131
This paper reports the apparatus and method for the safe treatment of pentachlorophenol(PCP)-treated ammunition box by solvent extraction. Experimental variables were chosen as the composition of solvents, types of substance(chips and sawdust), temperatures and sonication to obtain maximum PCP removal from wood samples of the dismantled ammunition box. Up to 99% of PCP in the wood chip was extracted within 2 hours at room temperature when using methanol as the solvent. The extraction volume ratio of methanol per dried sample was about 10. Type of samples, extraction temperature and sonification showed little effects on PCP extraction. Based on this study, a resource recycling system for the treatment of ammunition boxes was recommended.
Fault Detection for Extended Kalman Filter Using a Predictor and Its Application to SDINS
Yu, Jae-Jong ;
Journal of the Korea Institute of Military Science and Technology, volume 9, issue 3, 2006, Pages 132~140
In this paper, a new fault detection method for the extended Kalman filter, which uses a N-step predictor, is proposed. The N-step predictor performs the only time propagations for N-step intervals without measurement updates and its output is used as a monitoring signal for the fault detection. A consistency between the extended Kalman filter and the N-step predictor is tested to detect a fault. A test statistic is defined by the difference between the extended Kalman filter and the N-step predictor. The proposed method is applied to strapdown inertial navigation system (SDINS). By computer simulation, it is shown that the proposed method detects a fault effectively.