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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 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.
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.
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(S. H. Ahn),김주연(J. Y. Kim),김규철(K. C. Kim) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.1
This paper presents the static analysis, the modal analysis and the forced vibration analysis on engine structures to find out the structure-borne noise sources by finite element method.<br/> The deformation of engine structures under the maximum combustion gas force was calculated through the static analysis, and the resonance possiblities were predicted by the modal analysis which ascertains mode shapes and the corresponding frequencies of engine global and its major components in consideration of the oil film stiffness inside main bearings. One hand, the major noise sources in engine surfaces were investigated with the forced vibration analysis by means of finding the transfer mobilities on engine surfaces due to the piston impact and the velocity levels due to the combustion in consideration of oil film stiffness and damping coefficients.<br/> Finally, the direction of engine structure-borne noise reduction can be estabilished by the above-mentioned analysis procedure and the reduction effect of cost on proto-type engine build-up is expected.
기존의 엔진룸을 이용한 신규 개발 디젤 엔진의 지지계 결정에 관한 연구
김규철(K. C. Kim),김주연(J. Y. Kim),안상호(S. H. Ahn) 한국자동차공학회 1998 한국 자동차공학회논문집 Vol.6 No.5
This paper presents the procedures and technique of the decision on the mount in a diesel engine development newly.<br/> To assess the vibration characteristics of the engine plus transmission, their inertia mo-ments are calculated for three engine versions, i.e., NA(Naturally Aspirated), TC(Turbochar-ged) and TCI(Turbocharged and Intercooled). These data are used to determine the mount layout and stiffness values affecting the noise quality of an engine as well as a vehicle.<br/> The main purpose of this paper is to design the .mount rubber having the optimal stiffness characteristics through the investigation of the calculation results and the mount conditions when an engine is installed in a vehicle using the existing engine mount room.<br/> Thus, this paper describes the optimal mount positions, rubber stiffnesses, natural fre-quency, mode shapes and so on using ADAMS program to apply the newly developed en-gines to three different vehicles<br/>
스마트 에어백을 위한 거리 센서 융합 기술을 이용한 승객 감지 시스템
김병익(Byoung-Ik Kim),최원형(Won-Hyung Choi),배태욱(Tae-Wuk Bae),김영춘(Young-Choon Kim),안상호(Sang-Ho Ahn),김덕규(Duk-Gyoo Kim) 한국정보기술학회 2012 한국정보기술학회논문지 Vol.10 No.5
In this paper, we propose an occupant sensing system using a sensor fusion composing of pyroelectric infrared (PIR) sensor, ultrasonic distance (USD) sensor and infrared distance (IRD) sensor for a smart airbag. This sensor fusion system is used for realtime detection of position and body classification of occupants. The PIR sensor and USD sensor are located in front of an occupant in a vehicle jig. The IRD sensor array consisting of 9 IRD sensors is placed on top of an occupant. The PIR sensor is used to check the existence of the occupant and whether it is animate or inanimate objects. And the USD sensor and IRD sensor array recognize the position of the occupant. By using this sensor fusion system within a vehicles jig, the proposed system is experimentally evaluated in viewpoint of an realtime occupant detection performance. Through experimental results, we confirm that the proposed sensor fusion system can be applied to future smart airbag system.