http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
광학거울 시스템의 지지구조 설계를 위한 라그랑지 방정식과 최적화 기법 적용에 의한 효과분석
김학인,남병욱,김광태,김병운,Gimm, Hak In,Nam, Byoung Uk,Kim, Gwang Tae,Kim, Byung Un 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.3
The support structure of an optical mirror system is the one of the important design elements because the one affects the optical aberrations of the mirror surface. In this paper, Lagrange equation of the moving body of the fast steering mirror system(FSM) has been formulated to use with optimization design. Major goals for optimization are to assign the reasonably flexible stiffness to the structure and to enhance the first natural frequency of the mirror and support system in aid of more affordable control bandwidth for the FSM. Pursuing these purposes with the proposed method, the finite element analysis(FEA), optimization technique and the Zernike polynomial estimation are used for the design effects. It is concluded that the proposed approach for design well guides toward the desired design goals with regards to both structural and optical performances.
김학인 全南大學校 藝術硏究所 2001 藝術論集 Vol.4 No.-
The Music of the Greek is the most important in all antiquity. There are two cults that dominated musical concepts in general : (1) The Apollon cult made use of kithara, and was Characterized by charity of form, purity, and objectivity of expression. (2) The Dionysian cult, on the other hand, used the aulos and was characterized by ecstasy, passion, sensuality, and subjectivity. These two concepts have had varying roles in the subsequent history of oriental music, the former embodied in classical trends and the later in romantic trends. The doctrine of Ethos involved the belief that music has a direct effect upon the soul. The doctrine was established by the Peripatetics and Stoics. The diterming factors in musical Ethos were rhythm, mode, and the instrument employed. Very little is known about Roman music. In general, the Roman were imitators of Greek culture. They developed brass instruments largely for military purposes. The Christian Era in music encompasses the development of monophonic music from about 200 A.D. to about 1300. Sacred and secular melodies continued to develop long after the advent of polyphony. The most significant innovation in the entire history is the advent of polyphony in the 9th century. The polyphonic concept dominates the artistic development of all occidental music. The early states of its development(800-1200) take place in the late Carolingian period and the early Middle Ages. The music of the 12th and 13th centuries is referred to as the Ars Antiqua. This was the time of the late crusades, the building of the great Gothic Cathedrals of Europe.
상호 대국의 안테나 간 자동 추적 지향 기법 및 장치 연구
김학인,조성훈,이종효,Gimm, Hak In,Cho, Sung Hoon,Lee, Chong Hyo 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.5
The existing mobile antenna networks in the military use have been operated by the manual pointing between two antennas. The work presented here describes the study of ATPC(Automatic Tracking and Pointing Control) system between facing antennas and the related tracking and pointing performances. This system is able to automatically track the maximum RSSI(Received Signal Strength Indication) value from the source's RF(Radio Frequency) signal and then control for maintaining the LOS(Line of Sight) between two antennas. The system has three major units; the driving unit consisting of motors, harmonic drives and encoders, the sensor unit with a GPS(Global Positioning System) and AHRS(Attitude and Heading Reference System) and the control unit regulating all the tracking and pointing events. By using PI(Proportional and Integral) controller, this system is able to properly track and point the other antenna under the external disturbance like the wind load. Both the simulation and the experimental works have been successively carried out to prove the performances of the system.