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안상호,김영춘,이광세,김기홍,김성수,Ahn, Sang-Ho,Kim, Young-Choon,Lee, Kwang-Sei,Kim, Ki-Hong,Kim, Sung-Soo 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.6
The function of DIRCM(Directed Infrared Countermeasures) jamming is to cause the missile to miss its intended target by disturbing the seeker tracking process. The DIRCM jamming uses the pulsing flashes of IR energy and its frequency, phase and intensity have influence on the missile guidance system. In this paper, we analysis the DIRCM jamming effect of spin-scan reticle seeker. Simulation results show that the jamming effect is greatly influenced by frequency, phase and intensity of the jammer signal.
안상호,김영춘,이광세,김기홍,김성수,Ahn, Sang-Ho,Kim, Young-Choon,Lee, Kwang-Sei,Kim, Ki-Hong,Kim, Sung-Soo 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.2
The function of IRCM(Infrared Countermeasures) jamming is to cause the missile to miss its intended target by disturbing the seeker tracking process. This paper analyzes the jamming effect of IRCM jamming for a stationary reticle seeker. The phase error containing the azimuth angle information of target is analyzed for the intensity, frequency and duty ratio variation of the jammer pulse signal. We confirmed that the more the jammer frequency is similar to the spinning frequency of the stationary seeker, the more jamming effect is high.
Transfer Function Method를 이용한 자동차 연료탱크의 진동 피로 해석에 대한 연구
안상호,Ahn, Sang Ho 한국자동차안전학회 2020 자동차안전학회지 Vol.12 No.3
In this paper, the process of predicting efficient durability performance for vibration durability test of automobile parts using vibration test load on automobile fuel tank is presented. First of all, the common standard load that can be applied to the initial development process of the automobile was used for the fuel tank and the vulnerability of the fuel tank to the vibration fatigue load was identified through frequency response analysis. In addition, the vulnerability of the fuel tank was re-enacted through vibration durability test results, and the scale factor was applied to the standard load. In order to predict the vibration durability performance required for detailed design, vibration fatigue analysis was performed on the developed vehicle with the frequency of vibration severity equivalent to the durability test, and the vulnerability and life span of the fuel tank were identified through the process of applying weights to these selected standard loads, thereby reducing the test time of the development vehicle.
안상호,김영춘,김기홍,Ahn, Sang-Ho,Kim, Young-Choon,Kim, Ki-Hong 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.2
An infrared image synthetic method is proposed for infrared system simulation. The synthesis image uses a background IR image captured from real scene and a target IR modeling image. The radiances related with maximum and minimum temperatures of the background and target images are calculated from the Planck's blackbody equation. Based on them, the background and target images are compensated and synthesized. The proposed method is simulated and the IR target images are generated by RadThermIR software.