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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
Journal Basic Information
Journal DOI :
The Korea Institute of Military Science and Technology
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Volume & Issues
Volume 8, Issue 4 - Dec 2005
Volume 8, Issue 3 - Sep 2005
Volume 8, Issue 2 - Jun 2005
Volume 8, Issue 1 - Mar 2005
Selecting the target year
High Speed Impact and Penetration Analysis using Explicit Finite Element Method
Paik, Seung-Hoon ; Kim, Seung-Jo ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 5~13
The impact of a long-rod penetrator into oblique plates with combined obliquity and yaw is investigated. The study was done using a newly developed three dimensional dynamic and impact analysis code, which uses the explicit finite element method. Through the comparison of simulation result with experimental result and other code's result, the adaptability and accuracy of the developed code is evaluated under the complex situation in which yaw angle and oblique angle exist simultaneously. As a result of comparison, it has found that deformed shape, residual length and velocity, rotational velocity of long-rod show good agreement with experimental data. Through this study, the applicability and accuracy of the code as a metallic armour system design tool is verified.
Sensor Fusion for Underwater Navigation of Unmanned Underwater Vehicle
Sur, Joo-No ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 14~23
In this paper we propose a sensor fusion method for the navigation algorithm which can be used to estimate state vectors such as position and velocity for its motion control using multi-sensor output measurements. The output measurement we will use in estimating the state is a series of known multi-sensor asynchronous outputs with measurement noise. This paper investigates the Extended Kalman Filtering method to merge asynchronous heading, heading rate, velocity of DVL, and SSBL information to produce a single state vector. Different complexity of Kalman Filter, with. biases and measurement noise, are investigated with theoretically data from MOERI's SAUV. All levels of complexity of the Kalman Filters are shown to be much more close and smooth to real trajectories then the basic underwater acoustic navigation system commonly used aboard underwater vehicle.
Implementation of a Real-time Data fusion Algorithm for Flight Test Computer
Lee, Yong-Jae ; Won, Jong-Hoon ; Lee, Ja-Sung ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 24~31
This paper presents an implementation of a real-time multi-sensor data fusion algorithm for Flight Test Computer. The sensor data consist of positional information of the target from a radar, a GPS receiver and an INS. The data fusion algorithm is designed by the 21st order distributed Kalman Filter which is based on the PVA model with sensor bias states. A fault detection and correction logics are included in the algorithm for bad measurements and sensor faults. The statistical parameters for the states are obtained from Monte Carlo simulations and covariance analysis using test tracking data. The designed filter is verified by using real data both in post processing and real-time processing.
A Study on the Development of ASRP for Improvement of the Stockpile Ammunition Reliability
Choi, Seok-Cheol ; Bae, Yun-Ho ; Kim, Dong-Eok ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 32~40
The ASRP(Ammunition Stockpile Reliability Program) is a overall evaluation system of ammunitions to improve the combat strength, having a short history. The storage lifetime of ammunitions, more than 20 years since being produced, differs according to storage circumstance and period. And it shows the different reliability for munitions. Because most ammunitions in military have been stored for a long time, these ammunitions need to be evaluated to maintain Serviceability, Reliability, Safety and Performance for the use of military. In this paper, it suggested the need to develop the techniques for ourselves, to make more laboratories for surveillance and testing and to extend research funds & concerns.
Development of the Operational Architecture of Ventilative Nuclear Biological Chemical Collective Protection Systems
Kwon, Yong-Soo ; Lee, Hun-Hee ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 41~49
This work describes the ventilative NBC CPS(Nuclear Biological and Chemical Collective Protection Systems). The operational requirements of NBC CPS is derived using systems engineering approach. The NBC CPS system operational architecture which describes the operational concept of NBC CPS is proposed using a computer aided systems engineering tool.
The Knowledge Base-Constructing Method of Expert System for Soldiers Psychology Diagnosis with UNIK
Yang, Hyun-Seung ; Park, Sang-Sung ; Jang, Dong-Sik ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 50~57
This paper describes an expert system for soldiers psychology diagnosis. In the field warfare, platoon leaders or company commanders have to diagnose his soldier's condition correctly. The expert systems, a field of artificial intelligence, can be appropriate approach for ill-structured paradigm. This use an UNIK system. This UNIK system is composed of UNIK-FRAME, UNIK-BWD, UNIK-WBI, UNIK-INDUCE and UNIK-Interface. Especially, UNIK-WBI system is very useful to display soldiers psychology diagnosis and so easy to use it. Any leader or commander can easily do this. This paper data is based on DSMIV. Through This expert system, combat power can be kept and accidents be protected.
Development and Analysis of Real-time Distributed Air Defense System Simulator Using a Software Framework
Cho, Byung-Gyu ; Youn, Cheong ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 58~67
To overcome limitations of test scope, schedule and cost, M&S(Modeling & Simulation) technique has been applied for T&E(Test and Evaluation) of the state-of-art weapon systems. This paper proposes an air defense simulation software framework to reduce both redundancy an[1 programming errors in system simulator. The proposed framework consists of a 'model' and a 'middleware' The 'middleware' is a reliable communication service layer that supports not only HLA(High Level Architecture) which is an international standard in M&S but also TCP/IP, UDP and etc. The main role of 'model' is to schedule and to run the real-time distributed simulation. The proposed framework has been applied to M-SAM(Middle range Surface to Air Missile) system simulator. The proposed framework's scheduling and communication performance results are satisfactory and were measured by hardwired NTP(Network Timer Protocol) time-stamp with GPS(Global Positioning System) timer for better precision.
A Study of Optimization Using State Space Survey in Ad Hoc Network
Kim, Hyun-Chang ; Chung, Suk-Moon ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 68~76
In this paper, Ad-hoc network is a collection of mobile nodes without any wired infrastructure. Design of efficient routing protocols in ad-hoc network is a challenging issue. An AODV routing protocol for wireless ad hoc networks one that searches for and attempts to discover a route to some destination node. We propose a technique that reduce the number of Routing packet. Our technique use variable values reflecting the condition of network. This also contributes to improve throughput.
A Research on Improvement of Usability Testing Techniques for the Military Logistics Software
Um, Tae-Woong ; Park, K.S. ; Kim, Sang-Soo ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 77~84
In this research, usability testing techniques had been applied to currently operating Military Logistics System software, and the effects of improvements made were verified. Furthermore, this research aims to assist the army to execute their researches on usability testing in the future. Various usability testing techniques and guidelines presented in this paper will be easily adapted to the research environment of the army. Consequently, the results of this research would play an important role in future development and evaluation of the Military Logistics System software.
Sol-Gel Template Synthesis and Phase Transitions of
Chang, Ki-Seog ; Bu, Sang-Don ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 85~90
We report the phase transition temperatures of the
perovskite nanotubes made by sol-gel template synthesis. The lead zirconate(
) nanotubes were prepared with a chelate sol-gel of zirconium tetrabutoxide(
) and leadacetate(
anodisc membranes, with a 200nm pore size, served as the template. After removing the template in the 6M-NaOH solution, the
nanotubes so far have shown an anomalous transition temperature,
as measured by DSC with a small particle size, 15.4nm determined by X-ray analysis with the aid of Scherrer's equation.
A Technique for the Quantitative Analysis of the Noise Jamming Effect
Kim, Sung-Jin ; Kang, Jong-Jin ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 91~101
In this paper, a technique for the quantitative analysis of the noise jamming effect is proposed. This technique based upon the mathematical modeling for noise jammers and the probability theory for random processes analyses the jamming effect by means of the modeling of the relationship among jammer, radar variables and radar detection probability under noise jamming environment. Computer simulation results show that the proposed technique not only makes the quantitative analysis of the jamming effect possible, but also provides the basis for quantitative analysis of the electronic warfare environment.
The Listen-in Technique for Blind Signals
Nah, Sun-Phil ; Park, Cheol-Sun ; Jang, Won ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 102~109
In this paper, we propose a new listen-in technique to overcome the problems and the shortcomings which could possibly meet in the previous listen-in methods to deal with the blind signal manually according to operator's decision. In the proposed listen-in method, receiving the signals, classifying the modulation types, and demodulating the signals can be done automatically without operator's intervention. We realize the listen-in technology by developing the high speed frequency tuner, the automatic modulation recognizer, and the signal demodulator. In conclusion, we confirm and show that the developed equipment has a good performance in classifying the modulation type through the computer simulation and the field test.
Detection Algorithm of Lenslet Array Spot Pattern for Acquisition of Laser Wavefront
Lee, Jae-Il ; Lee, Young-Cheol ; Huh, Joon ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 110~119
In this paper, a new detection algorithm was proposed for finding the position of lenslet array spot pattern used to acquire laser wavefront. Based on the analysis of the required signal processing characteristics, we categorized into and designed four main signal processing functions. The proposed was designed in order to have robust feature against a variation of geometrical form of the spot and also implemented to have semi-automatic thresholding capability based on CCD noise analysis. For performance evaluation, we made qualitative and quantitative comparisons with Carvalho's algorithm which has been published in recent. In the given experimental spot images, the proposed could detect the spots which has 1/3 times lower than the least S/N of which Carvalho's can detect and could reach to a detection precision of 0.1 pixel at the S/N. In functional aspect, the proposed could separate all valid spots locally. From these results, the proposed could have a superior precision of location detection of spot pattern in wider S/N range.
Analysis of Blast Wave of Explosives by the Scaling Law
Park, Jung-Su ; Kim, Sung-Ho ; Lee, Keun-Deuk ; Lee, Jai-Min ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 120~129
To analyze a blast effect of developed explosives, three different kinds of aluminized tastable explosives and melted cast explosive TNT were used. Conventional explosive TNT was used as a reference. Each tested explosive charge of 340mm diameter spherical type was initiated at the charge center with DXD-65(
) booster and RP-87 EBW detonator. Thirteen piezo type pressure sensors were located at a range from 4 to 50m away from the charge. From the blast wave profiles, we calculated a peak blast pressure and impulse of the explosion. The calculated pressures and in pulses were converted to TNT Equivalent Weight(TEW) factor by the scaling ]aw method. The average TEW factors based on the blast pressure of TX-01, TX-02, TX-03, TX-04 were 1.298, 1.05, 1.266, 1.274 and the average TEW factors based on impulse were 1.504, 1.686, 1.640, 1.679. From the results, we concluded that TEW factors based on blast pressure and based on impulse of aluminized explosives were superior to TNT. This results are owing to the high contents of aluminum in formulations.
Vibration Control of Beam using Piezoceramic Composite Actuator LIPCA
Arief, Suhariyono ; Goo, Nam-Seo ; Park, hoon-Cheol ; Yoon, Kwang-Joon ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 130~135
This paper presents application possibility of Lightweight Piezoceramic Composite Actuator(LIPCA) to suppress vibration of dynamic structures as an actuator. LIPCA is composed of a piezoelectric layer, a carbon/epoxy layer and glass/epoxy layers. When compared to the bare piezoelectric ceramic(PZT), LIPCA has advantages such as high performance, durability and reliability. In this study, performances of LIPCA have been estimated in an active vibration control system. Experiments were performed on an aluminum beam with cantilever configuration. In this test, strain gages and single LIPCA are attached on the aluminum beam with epoxy resin. Digital ON-OFF control algorithm is applied into the system to exhibit performance of LIPCA as actuator in active vibration control system. First, we performed static actuation test of bare PZT and LIPCA in order to show the superiority of LIPCA. Secondly, we carried out beam vibration control test using LIPCA. The results showed LIPCA could suppress free vibration of the aluminum beam, which means that LIPCA can be applied as an actuator to control vibration of dynamic structures.
The Calculation of Stress Intensity Factors in the Orthotropic Elastic Plate with the Cracked Circular-hole using a Contour Integral Method
Kim, Jin-Woo ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 136~145
Effect of CCC Composition on Burning Characteristic for 120mm Kinetic Energy Ammunition
Kwon, Soon-Kil ; Hwang, Jun-Sik ; Choi, Sang-Kyung ; Kim, Jin-Seok ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 146~151
The burning rates of combustible cartridge cases(CCCs) of 120mm kinetic energy ammunition were measured by CBT(Closed Bomb Tester). The burning coefficient was 1.4 for CCC fabricated by Post Impregnation(PI) process, and 1.0 for that by Beater Additive(BA) process. The BA process CCC showed the fixed burning coefficient of 1.0 in spite of changing the composition of CCC. As the Korean Future Main Battle Tank is requiring the high penetration performance compared with that of KlAl tank ammunition(K276), CCC was designed to have higher impetus composition than that of K276 composition(525J/g). The optimum impetus was 600J/g when considering the increases of pressure and muzzle velocity with increasing impetus. When impetus of CCC by changing the composition increased from 525J/g to 600J/g, the muzzle velocity of 12m/s at pressure increase of 3500psi increased in case of using SCDB propellant.
A Study on the Development of Fuel Metering Unit for Air Breathing Engine
Lee, Do-Yun ; Choi, Hyun-Young ; Park, Jong-Seung ; Koo, Ja-Yoeng ;
Journal of the Korea Institute of Military Science and Technology, volume 8, issue 4, 2005, Pages 152~158
In this paper, we have proposed a fuel metering unit of ai breathing engine. The proposed valve system consists of a constant pressure drop valve and a metering valve, which are controlled by servovalve. We carried out nonlinear and linear analysis, computer simulation and experimentation to find effects of some factors on system performance. Analysis and experimental results show a good agreement. It is also shown that the system stability is affected by pressure drop of metering valve and inlet pressure of injectors.