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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 16, Issue 6 - Dec 2013
Volume 16, Issue 5 - Oct 2013
Volume 16, Issue 4 - Aug 2013
Volume 16, Issue 3 - Jun 2013
Volume 16, Issue 2 - Apr 2013
Volume 16, Issue 1 - Feb 2013
Selecting the target year
A Study on the Armor Optimization of Military Vehicle
Lee, Hyun-Jin ; Choi, Jae-Shik ; Kim, Geun-Won ; Shin, Ki-Su ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 405~413
DOI : 10.9766/KIMST.2013.16.4.405
During the land operations, the enemy's gunnery is the primary threat. For the military vehicle, the bulletproof effect is the one of the important issues regarding the safety of soldiers on duty. Recently, the advanced military vehicles have planned to install armor plates. However, due to the budget problem, it is difficult to equip the protection systems. Hence, the optimum approach to increase bulletproof capability is essential. In this paper, the optimum thickness and component of the armor of military vehicles were evaluated by using finite element analysis for bullet impact effects. To achieve this aim, 7.62mm NATO bullet, 1.6mm steel and Kevlar-29 composite have been modeled and the simulations were conducted with various thickness cases by using MSC Nastran sol 700. Consequently, it was revealed that Kevlar-29 45 Layer is appropriate thickness for 7.62 bulletproof. Furthermore, Kevlar-29 in front of steel was effective by comparison with the back of steel for bulletproof.
Design of IFF(Identification of Friend and Foe) Landmine using RFID Technology
Jang, Jong Hun ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 414~421
DOI : 10.9766/KIMST.2013.16.4.414
In this paper, a novel IFF(Identification of Friend and Foe) landmine system has been designed and fabricated using RFID(Radio Frequency Identification) wireless communication system. The IFF landmine system is composed of RECOMS(Remote Controlled Munition System), RFID reader and RFID tag. When the friendly forces have been identified by RFID wireless communication, the IFF landmine is unloaded automatically and indicates the warning message to the operator. Through the discussion, the detailed designs and the test results of identification distance have been described and antenna revision plans for improving the performance have been mentioned.
Analysis and Implementation of High Speed Data Processing Technology using Multi-Message Chain and Double Buffering Method with MIL-STD-1553B
Kim, Ki-Pyo ; Ahn, Kee-Hyun ; Kwon, Yong-Sung ; Yun, Seok-Jae ; Lee, Sang-Hoon ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 422~429
DOI : 10.9766/KIMST.2013.16.4.422
MIL-STD-1553B communication is globally used in the area of aerospace and defense which require safety and reliability in spite of its low communication speed. As recently increased requirements for high precision and robust guidance ability of missiles, missile sensor equipment needs more data to satisfy those requirements. Therefore, missile systems to adopt MIL-STD-1553B requires higher data transfer and processing capability than those of the current systems. In this paper, we describe the result of analysis and implementation of the existing methods that applied multi-message chain and double buffers to improve the current missile system.
Deformation of STS Cup for EFI Detonator in High Velocity Impact
Kim, Seok-Bong ; Yoo, Yo-Han ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 430~434
DOI : 10.9766/KIMST.2013.16.4.430
In this paper, we have investigated deformation of cup for EFI detonator in high velocity impact test. The experimental result shows that STS cup deformed 0.170 mm with the bulged shape. The numerical simulation result with static/dynamic material properties of SUS304 shows 0.166 mm of deformation. The main parameters to decrease the deformation of cup are stength, thickness and density of cup. The initial condition of SUS304 cup was strength of 215 MPa and thickness of 0.12 mm. As strength increases to 500 MPa, deformation of cup converges to 0 mm, and as thickness increases to 0.18 mm, deformation of cup converges to 0 mm. If the density of cup decreases from 8 to 2.7 g/cc, the deformation of cup decreases to 0.141 mm.
A Design Method of the Simulation Program for HILS
Park, Haerhee ; Jeon, In-Soo ; Song, Chang-Joon ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 435~440
DOI : 10.9766/KIMST.2013.16.4.435
In this paper, a design method of the simulation program for HILS(Hardware-In-the-Loop Simulation) system is proposed. The present method consists of definition of requirements for HILS, development of specifications, and implementation of the program to satisfy the specifications. In the implementation of the program, the application of hardware interface and the concept of structural modularization are proposed to satisfy the specifications. The concepts of CSCI(Computer Software Configuration Item) and encapsulation are used for structural modularization. The proposed method was practically applied to the development of the simulation program for the efficient operation in HILS of an anti-ship missile system.
Development of IIR Seeker Target Simulator
Yun, Seok-Jae ; Ryu, Dong-Wan ; Hwang, Kang-Seok ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 441~448
DOI : 10.9766/KIMST.2013.16.4.441
This paper describes the development of Target Simulator developed for performance test and failure detection of Imaging Infra-Red(IIR) seeker which is one of the most important equipments in specific cruise missile systems. The simulator makes it possible to test detecting and tracking performance for target, uniformity of IIR, FOV status and spatial resolving power. Besides, it includes several self-test functions and optic axis alignment methods to improve its own reliability.
Test Technique for Performance Verification of Fracture-Type Canister Cover
Chung, Jae-Wook ; Shin, Sang-Mok ; Bae, Young-Gwan ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 449~455
DOI : 10.9766/KIMST.2013.16.4.449
When a missile is launched, a fracture-type canister cover should be properly broken by a collision with a missile or inner pressure of a canister. The fracture performance of a canister cover should be evaluated by a test using a real missile; however, it is unrealistic due to high cost and time restriction in a design stage. In this study, a test technique is newly developed to predict fracture performance of a canister cover. The test was design to have same kinetic energy with a real missile test when the cover is collide with a missile. The effectiveness of the suggested test technique was proved by comparing the test result with that of a real missile test.
Interference Pattern Analysis of the Radiated Noise in Submarine Passive Sonar
Kim, ByoungUk ; An, SangKyum ; Lee, Kuenhwa ; Seong, WooJae ; Hahn, JooYoung ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 456~464
DOI : 10.9766/KIMST.2013.16.4.456
Passive sonar in submarine can detect the target in long range and can attack using it. There are many noises which can be received at passive sonar of submarine. When noise received in the sonar it make diverse interference pattern depend on the ocean ambient and movement scenario. Interference pattern can be explained by theory of waveguide invariant. In this paper, analyze the interference pattern according to the relative motions of surface ship and submarine. And analyze the occurrence reason of 2 kinds of interference patterns those are usually display on the submarine console. The results show that if relative speed of submarine and target increase then gradient of interference pattern will increase. And closest point approach of submarine and target decrease then gradient of interference pattern will increase. Bathtube pattern usually appear when target pass though close to submarine and Pinetree pattern appear target pass though above of submarine.
A Study on Magnetic Signature Analysis Techniques of a Scaled Model Ship using Earth Magnetic Field Simulator
Yang, Chang-Seob ; Chung, Hyun-Ju ; Jeon, Jae-Jin ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 465~472
DOI : 10.9766/KIMST.2013.16.4.465
Since 1990, Agency for Defense Development is operating the non-magnetic laboratory for the development of key technology for the underwater magnetic stealth part, the research of the magnetic application weapons and the technical support for Korean Navy. Recently, we installed the new three-axis earth magnetic field simulator and the measurement system in the non-magnetic laboratory which is replacing the existing outdated facility. In this paper, we deal with the detailed design result of the earth magnetic field simulator and the measurement system. Also, we describe the effective method to separate the permanent and the induced magnetic field from the measured data for a scaled model ship using the earth magnetic field simulator and the measurement system.
Global Path Planning for an Autonomous Underwater Vehicle in a Vortical Current Field by Using Genetic Algorithm
Lee, Ki-Young ; Kim, Subum ; Song, Chan-Hee ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 473~480
DOI : 10.9766/KIMST.2013.16.4.473
The purpose of this paper is to demonstrate that the genetic algorithm can be useful for the global path planning when the obstacles and current field data are given. In particular, the possibilities for a novel type small AUV mission deployment in tidal regions, which experience vortical currents, were examined. Experimental simulations show feasibility and effective in generate the global path regardless of current and obstacles. By choosing an appropriate path in space, an AUV may both bypass adverse currents which are too fast to be overcome by the vehicle's motor and also exploit favorable currents to achieve far greater speeds than motors could otherwise provide, while substantially saving energy.
Potential Panel and Vortex Particle Coupling Analysis for Rotor Aerodynamics
Jang, Ji Sung ; Chung, In Jae ; Lee, Duck Joo ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 481~485
DOI : 10.9766/KIMST.2013.16.4.481
Rotor wake causes unsteady aerodynamics of rotor blade. So, accurate prediction of wake is very important and vortex method is good solution for this problem. Aerodynamic force of the rotor blade is calculated by potential panel method and the rotor wake is simulated by vortex particle method. The vortex particle method is easier to treat wake-body interaction and has better performance to expect the effect of ground and fuselage interaction. Rotor in hovering and forward flight condition is simulated through these methods. Thrust and surface pressure of rotor are compared with experiment data.
A Development of Pivoting Composite Wing for Mounting Kit
Joo, Young-Sik ; Jun, Woo-Chul ; Byun, Kwan-Hwa ; Cho, Chang-Min ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 486~492
DOI : 10.9766/KIMST.2013.16.4.486
The pivoting composite wing is developed for the kit to be mounted on the external stores. The wing has a pivoting structure for the installation to an aircraft and high aspect ratio to increase lift drag ratio. The wing needs to be light and have sufficient strength and stiffness to satisfy structural design requirements. The wing is designed with carbon fiber composite and the structural parts are integrated to reduce cost to manufacture. In order to verify the structural performances, the design load analysis and flight load survey, the static analysis and test, the ground vibration test and flutter analysis are performed. It is shown that the wing has sufficient structural strength and stiffness to satisfy the structural design requirements.
Evaluation of Protective Performance of Protection Materials for Field and Structural Body by Ignition of 155mm Artillery Shell and C-4 Explosive
Lee, In-Cheol ; Kim, Hong-Seop ; Nam, Jeong-Soo ; Kim, Suk-Bong ; Hong, Won-Hee ; Kim, Gyu-Yong ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 493~500
DOI : 10.9766/KIMST.2013.16.4.493
In this study, it was evaluated the protective performance of the protection material for filed of the army by impact of fragment from the explosion of 155mm artillery shell to propose the improvement items. And it was evaluated the protection materials for structural boby such as corrugated steel plate, concrete block, prevention paint of explosion, aluminum foam and concrete T-wall by impact of fragment of 155mm artillery shells and explosion-induced pressure of C-4 explosive. As a result, protective performance of the existing protective material was superior but reinforcement is necessary for secondary damage because sand is leaking. The protective performance of new protective materials was greater than existing protective materials. And it can be used for protective materials.
A Simulation on the Weapon System of Rotorcraft for Improving the Effects of Korean Future Combat System(FCS)
Hong, Jungwan ; Park, Sang C. ; Kwon, Yongjin ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 501~506
DOI : 10.9766/KIMST.2013.16.4.501
This research is to develop a simulation framework to gauge the mission effectiveness of the rotorcraft system that will be a part of Korean future combat system. The rotorcraft system comprises of many subsystems that are very time-consuming and tedious to model. Each subsystem and its characteristics have been modeled using component-based modeling techniques, which enhances its reusability. The entire system is then constructed from the individually modeled component, which significantly reduces the modelling time. The mission effectiveness of the rotorcraft system is simulated using the developed models, and the output indicates that the methodology proposed in this study is useful, which will be suitable for the modeling and simulation of Korean future combat system.
Strengthening of Borosilicate Glass by Ion Exchange for Lightweight Transparent Bulletproof Windows Materials
Shim, Gyu-In ; Eom, Hyengwoo ; Choi, Se-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 507~513
DOI : 10.9766/KIMST.2013.16.4.507
Transparent bulletproof windows play an important role in the munitions industry. The thickness of bulletproof windows including soda-lime silicate(SLS) glass, polyvinyl butyral, poly urethane, main defense(200MD), and safety film was reduced from 40mm to 29mm by adjustment of SLS glass laminated array. Borosilicate glasses generally have lower surface density and more excellent mechanical properties than SLS glass. Borosilicate glass was strengthened by ion exchange in the
powder. The maximum mechanical properties were observed at
for 10min. The Vickers hardness, fracture toughness and 3-point bending strength of ion exchanged samples were about
and 764MPa each, which are about 27%, 149% and 249% higher than parent borosilicate glass, respectively. The penetration depth of K+ ion at
for 10min was
. As a result, the transparent bulletproof windows were predicted to be more lightweight by ion exchange of borosilicate glass. If the SLS glass for bulletproof windows is replaced by ion exchanged borosilicate glass, the bulletproof windows can be expected to be lightweight and thinner.
Development and Performance Analysis of Radar Signal Processing for Autonomous Unmanned Ground Vehicle
Shin, Seung-Yong ; Choi, Jun-Hyeok ; Park, Sang-Hyun ; Yeom, Dong-Jin ; Kim, Jeong-Ryul ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 514~522
DOI : 10.9766/KIMST.2013.16.4.514
In this paper, we present signal processing procedure and carry out performance analysis of FMCW(Frequency Modulation Continuous Wave) radar for Autonomous Unmanned Vehicle(AUV). In order to detect range profile and velocity of the unknown target, we must implement two step FFT(Fast Fourier Transform) procedure. And the DBF(Digital Beam Forming) algorithm has to be performed to obtain the angle information of the unknown target. To verify the performance of manufactured autonomous unmanned ground vehicle FMCW radar, we use the data of the real corner reflecter target.
A Precise Trajectory Prediction Method for Target Designation Based on Cueing Data in Lower Tier Missile Defense Systems
Lee, Dong-Gwan ; Cho, Kil-Seok ; Shin, Jin-Hwa ; Kim, Ji-Eun ; Kwon, Jae-Woo ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 523~536
DOI : 10.9766/KIMST.2013.16.4.523
A recent air defense missile system is required to have a capability to intercept short-range super-high speed targets such as tactical ballistic missile(TBMs) by performing engagement control efficiently. Since flight time and distance of TBM are very short, the missile defense system should be ready to engage a TBM as soon as it takes an indication of the TBM launch. As a result, it has to predict TBM trajectory accurately with cueing information received from an early warning system, and designate search direction and volume for own radar to detect/track TBM as fast as it can, and also generate necessary engagement information. In addition, it is needed to engage TBM accurately via transmitting tracked TBM position and velocity data to the corresponding intercept missiles. In this paper, we proposed a method to estimate TBM trajectory based on the Kepler's law for the missile system to detect and track TBM using the cueing information received before the TBM arrives the apogee of the ballistic trajectory, and analyzed the bias of prediction error in terms of the transmission period of cueing data between the missile system and the early warning system.
EO/IR Images Registration using Recursive Localized Normalized Mutual Information and Implementation
Jeon, Yunho ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 537~544
DOI : 10.9766/KIMST.2013.16.4.537
This paper proposes a recursive localized Normalized Mutual Information(NMI) algorithm to overcome shortcomings of the conventional NMI algorithm and the localized NMI algorithm which proposed before. The localized NMI algorithm divides images into few fixed size segments and applies NMI algorithm to each segments. By extension, the proposed algorithm uses variable size segments using its characteristic. Dividing each segment recursively, the algorithm selects a suitable segment size and improves a performance of the image registration. Experimental result shows the performance of the proposed algorithm.
Study on the Seasonal IR Signature Characteristics of a Naval Ship with Plume Gas Effect
Han, Kuk-Il ; Kim, Dong-Geon ; Choi, Jun-Hyuk ; Kim, Tae-Kuk ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 545~552
DOI : 10.9766/KIMST.2013.16.4.545
This paper is a part of developing a computer code that can be used to generate IR images of a naval ship by considering the emitted and reflected infrared signals. The spectral radiance received by an IR sensor is consisted of the self-emitted component from the ship surface, the reflected component of the solar/sky irradiance at the ship surface, the emitted radiance from the ship surface and the exhaust plume gas, and the scattered radiance by the atmosphere. The plume gas radiance occupies a large part of the emitted radiance from a naval ship in operation. Therefore plume gas radiance must be taken into account when calculating the radiance from a naval ship for reliable IR images. In this paper, IR images of a naval ship with the exhaust gas effect in various environmental conditions are generated by using an exhaust gas prediction model called the JPL model. The contrast radiance (CR) values of the IR images are calculated to analyze the effect of the exhaust gas radiance quantitatively. The results obtained by quantitative analysis show that the IR signatures with the exhaust plume gas are 2.26 times larger than those neglecting the plume gas effect. The effect of the exhaust plume gas is shown to be more eminent in winter than in summer in the daytime.
Characterization of Several Selectively Permeable Membrane Materials with Water Resistance and Protective Performance
Kang, Jae-Sung ; Seo, Hyeon-Kwan ; Kwon, Tae-Geun ; Kim, Jin-Won ; Park, Hyen-Bae ; Lee, Hae-Wan ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 553~559
DOI : 10.9766/KIMST.2013.16.4.553
We make several membranes with multilayer structure and characterize protective performance in various ways. Multilayer membrane is composed of shell fabric, support membrane, functional polymer membrane and liner fabric. In this research, we apply cellulose acetate derivatives as base polymer in functional polymer membrane and characterize water resistance, water vapor permeation, protective performance against DMMP and aerosol. Test results show that cellulose based polymer with polyethyleneimine possess performance with good water vapor permeation and excellent protective capability against DMMP equivalent to Saratoga type's protective suits. Also, these materials possess aerosol protective performance and water resistance.
Decontamination Condition of Geobacillus Stearothermophilus Spore on the Surface of Various Coupons using Hydrogen Peroxide Vapor
Kim, Sang Hoon ; Jung, Kyoung Hwa ; Kim, Se Kye ; Chai, Young Gyu ; Kim, Yun Ki ; Hwang, Hyun Chul ; Kim, Min Cheol ; Park, Myung Kyu ; Ryu, Sam Gon ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 560~565
DOI : 10.9766/KIMST.2013.16.4.560
Biological decontamination means the removal of microorganisms from the inanimate object such as building or equipment. In this study, hydrogen peroxide vapor efficacy test using VHP 1000ED system(Steris LifeSciences) were conducted for G. stearothermophilus spore with agent materials(aluminum, stainless steel, poly-carbonate, viton, silicone, kapton and glass). Total recovered spores exposed to hydrogen peroxide vapor(1.0 g/min) during 7, 15, 30, 60 min were calculated. As a result, all agent materials were totally decontaminated within 60 min at 1.0 g/min concentration with 35% hydrogen peroxide vapor. Finally, we could confirmed that hydrogen peroxide vapor possess sporicidal capacity of G. stearothermophilus and found the optimum decontamination conditions with VHP1000ED system.
Improved Input Voltage Sensorless Control of Three-Phase AC/DC PWM PFC Converter using Virtual Flux Observer
Kim, Young-Sam ; So, Sang-Ho ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 566~574
DOI : 10.9766/KIMST.2013.16.4.566
In this paper, direct power control system for three-phase PFC AC/DC converter without the source voltage sensors is proposed. The sinusoidal input current and unity effective power factor are realised based on the estimated flux in the observer. Both active and reactive power calculated using estimated flux. The estimation of flux is performed based on the reduced-order virtual flux observer using the actual currents and the command control voltage. Moreover, source voltage sensors are replaced by a estimated flux. DC output voltage has been compensated by DC output ripple voltage estimation algorithm. The active and reactive powers estimation are performed based on the estimated flux and Phase angle. The proposed algorithm is verified through simulation and experiment.
Aerodynamics of a 2-D Flat-plate Airfoil with Tripwire
Je, Du-Ho ; Lee, Jongwoo ;
Journal of the Korea Institute of Military Science and Technology, volume 16, issue 4, 2013, Pages 575~581
DOI : 10.9766/KIMST.2013.16.4.575
In this paper, we experimentally investigated the effects of attached cylindrical tripwires on the aerodynamic performance. The research was carried out with a simple two-dimensional (2-D) rectangular airfoil fabricated from thin flat-plate aluminium, with elliptical leading and trailing edges. Tripwires of varying widths and thicknesses, and attack angles of
were used to investigate the aerodynamic characteristics (e.g. lift and drag forces) of the airfoil. We found that attaching the tripwires to the lower surface of the airfoil enhanced the lift force and increased the lift-to-drag ratio for low attack angles. However, attaching the tripwires to the upper surface tended to have the opposite effects. Moreover, we found that attaching the tripwires to the trailing edge had similar effects as a Gurney flap. The aerodynamic characteristics of the flat-plate airfoil with tripwires can be used to develop passive control devices for aircraft wings in order to increase their aerodynamic performance when gliding at low attack angles.