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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 5, Issue 4 - Dec 2002
Volume 5, Issue 3 - Nov 2002
Volume 5, Issue 2 - Jul 2002
Volume 5, Issue 1 - May 2002
Selecting the target year
A Temperature Analysis Study of East Asia for Generation of Temperature Specification
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 11~22
In this paper, a statistical meaning that the 1% frequency value which is used as a basis for the temperature specification generation for weapon systems is similar to
frequency value of a year is presented, and the theoretical reference for temperature specification generation is made. The new method which extracts the 1% frequency value from general weather data, not depending on long term temperature hour data, is established, and the temperature analysis result of East Asia is also presented by using this method. On the basis of these result, operational temperature for the weapon systems to be used in the area of East Asia is recommended.
Derivation of Empirical Method to Enhance the Accuracy of Cannon Tube Erosion Rate
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 23~32
We predict the erosion rate of unknown cannon tubes by substituting measured values of the standard cannon, 155㎜ Howitzer M185 and ballistic data for the erosion equation. We know ten measured erosion values of the standard cannon at every 400 rounds. An approximate formula is derived to interpolate six values up to 2,000 rounds. Numerical example is presented and its results are analyzed. The new erosion equation is also suggested. This equation produces more accurate cannon tube erosion rate than the Rauf Imam's empirical approaches. Computer simulations are presented.
A Study on the 3-D Digital Modelling of the Sea Bottom Topography
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 33~44
In this study, 3-dimensional virtual visualization was performed for a rapid and accurate analysis of sea bottom topography. The visualization was done through the extracted data using the developed program and the generated data using the gridding method. The data extraction program was developed with AutoLISP programming language and this program was able to extract the needed sample bathymetry data from the electronic sea chart systematically as well as effectively The gridded bathymetry data were generated by the interpolation or extrapolation method from the spatially-irregular sample data. As the result of realization for the 3-dimensional virtual visualization, it was shown a proper feasibility in the analysis of the sea bottom topography to determine the route of submarine cable burial.
Range Measurement in High PRF Seeker
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 45~55
Systhesis New Precursors for Hexanitrohexa-azaisowurtzitane(HNIW)
Cheun, Young Gu ;
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 56~61
The hexanitrohexaazaisowurtzitane(HNIW) is a polycyclic caged nitramine oxidizer. For most existing weapons systems, the most critical ingredient in explosive and propellant applications is the oxidizer, HNIW, with its increase in performance output and energy capabilities for future in explosive and propellant systems. Two new polyacylhexaazaisowurtzitanes were synthesized. Pentaacetylhexaaza-isowurtzitane(PAIW) or pentaacetylformylhexaazaisowurtzitane(PAFIW) can be a precursor in the preparation of HNIW, recently developed highly energetic material.
Coordinates Tracking Algorithm Design
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 62~76
This paper describes the design of a Coordinates Tracking algorithm for EOTS and its error analysis. EOTS stabilizes the image sensors such as FLIR, CCD TV camera, LRF/LD, and so on, tracks targets automatically, and provides navigation capability for vehicles. The Coordinates Tracking algorithm calculates the azimuth and the elevation angle of EOTS using the inertial navigation system and the attitude sensors of the vehicle, so that LOS designates the target coordinates which is generated by a Radar or an operator. In the error analysis in this paper, the unexpected behaviors of EOTS that is due to the time delay and deadbeat of the digital signals of the vehicle equipments are anticipated and the countermeasures are suggested. This algorithm is verified and the error analysis is confirmed through simulations. The application of this algorithm to EOTS will improve the operational capability by reducing the time which is required to find the target and support especially the flight in a night time flight and the poor weather condition.
Vortex Interaction Characteristics of a Delta Wing/LEX
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 77~86
An experimental study of the vortex interaction characteristics of a delta wing/LEX configuration was conducted in a wind tunnel using the micro water droplet and laser beam sheet visualization technique. The main focus of this study was to analyze the effect of the angle of attack and sideslip angle on the vortex interaction and vortex breakdown. These tests were accomplished at angles of attack between
and sideslip angle between
at free-stream velocity of 6.2 m/s. Flow visualization data provide a description of the vortex interaction between LEX and wing vortices, and of the vortex breakdown. The introduction of LEX vortex stabilized the vortical flow, and delayed the vortex breakdown up to higher angle of attack. The vortex interaction and breakdown was promoted on the windward side, whereas they are suppressed on the leeward side.
Effect of Microstructures on the Deformation Behavior of Ti-6Al-4V Alloy at Ultra High Strain rate
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 89~97
In this study, the effect of
-phase morphology on the dynamic deformation behavior at ultra high strain rate was investigated by EBW(Explosive Bridge Wire) test. All of tests and analyses were conducted on three typical microstructures of Ti-6Al-4V alloy, i.e. equiaxed, widmanstatten and bimodal microstructures. The spall strength and HEL(Hugoniot Elastic Limit) of the specimens that have the thickness of 2mm and 4mm were highest with the bimodal microstructure. These results were similar with previous study which was performed by dynamic torsion test(Kolsky torsion test).
The Development of an airbone-based direction-finding system for EW application
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 98~104
An airborne-based Direction-Finding System is developed for the application of ELINT and ES(Electronic Support). The system takes the phase-comparison technology, and has the configuration of multi-based antenna array for the solution of ambiguity due to the increased Direction-Finding resolution. This thesis describes the design of optimized distances among antennas, the electrical characteristics, the method of compensation, the direction-finding accuracy, and et. al. under the condition of the airborne-based environment.
Decomposition of Acetonitrile by Planar Type Dielectric Barrier Discharge Reactor
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 105~112
A combined process of non-thermal plasma and catalytic techniques has been investigated to treat toxic gas compounds in air. The treated gas in the present study is
CN that has been known to be a simulant of toxic chemical agent. A planar type dielectric barrier discharge(DBD) reactor has been used to generate non-thermal plasma that produces various chemically active species, O, N, OH,
, ion, electrons, etc. Several different types of adsorbents and catalysts, which are MS 5A, MS 13X, Pt/alumina, are packed into the plasma reactor, and have been tested to save power consumption and to treat by-products. Various aspects of the present techniques, which are decomposition efficiencies along with the power consumption, by-product analysis, reaction pathways modified by the adsorbents and catalysts, have been discussed in the present study.
Target Adaptive Guidance Using Near-Zone Information from IR Seeker
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 113~119
A target adaptive guidance(TAG) algorithm is proposed employing the near-zone signal that can be measured from an infrared seeker. The guidance order is composed of a conventional PNG command and an additional command to be calculable from an additional LOS rate between a hot point of target and a required intercept point. The characteristic of the near-zone signal is similar to that of LOS rate that is inversely proportional to the square of time-to-go. Hence the proposed scheme can be applied to real systems with no estimator for time-to-go. From analysis results on the miss distance with perfect missile and perfect seeker, it follows that the proposed TAG algorithm guarantees missile to be ideally guided to the required intercept point. And it is less affected by the TAG start time and a proportional navigation ratio than other TAG schemes using a LOS rate such as a step bias or a ramp bias.
Development of Micro Turbine based on MEMS Technology
Journal of the Korea Institute of Military Science and Technology, volume 5, issue 3, 2002, Pages 120~124
Microturbine refers to turbines on the scale of centimeters which can transmit power on the order of tens of Watts. Such devices can be used as propulsion or power generation devices for various military systems. An interdisciplinary team at Seoul National University has designed, and fabricated such a device, and this paper describes each phase. A commercial code has been used for design, and MEMS processes have been used for manufacturing. Finally, some preliminary test results are presented.