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곽문규,정경권,신재호,Kwak Moon-K.,Chung Kyung-Kwon,Shin Jae-Ho 한국공학교육학회 2000 공학교육연구 Vol.3 No.2
This paper is concerned with the development of remote engineering laboratory using the internet. Recently, various virtual laboratories are introduced using the multimedia technologies but the internet laboratory using the real hardware system is not present. In this study, we developed the remote engineering laboratory by combining the GPIB program which controls the hardwares with the web programming which controls the internet. The function generator, LCR meter, and oscilloscope were considered as the measurement devices. The client program includes the user-interface which carry out experiment remotely. Several electrical experiments were set up to verify the experimental process. It has been found that the remote engineering experiments are feasible and valid. The methodologies will be discussed in detail. 본 논문은 인터넷을 이용한 공학 교육의 효과를 높이기 위한 수단으로서 원격 계측 실험실의 구축에 대하여 연구한 결과를 포함하고 있다. 최근에 멀티미디어를 이용한 가상 실험 실습실의 축이 가시화되고 있으나 실제 시스템을 대상으로 한 인터넷 실험 실습실은 널리 보급되고 있지 않다. 본 논문에서는 실험실 자동화를 위하여 사용된 GPIB제어 기술과 인터넷 연결 기술을 결합하여 원격으로 실험 실습이 가능한 시스템을 구축하였다. 함수발생기, LCR미터, 오실로스코우프에 대한 제어 프로그램을 구축하고 몇 가지 전자 회로를 대상으로 실험을 수행해 본 결과 다양한 종류의 실험을 원격으로 수행할 수 있으며 교육 효과 또한 매우 높음을 발견할 수 있었다. 본 연구에서는 원격 계측 실험실 구축과 관련된 기술을 소개하고 문제점을 토의하고자 한다.
독립좌표연성법을 이용한 직사각형 구멍을 갖는 직사각형 평판의 자유진동해석
곽문규(Kwak, Moon K.),한상보(Han, Sangbo) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.12
This paper is concerned with the vibration analysis of a rectangular plate with a rectangular hole. Even though there have been many methods developed for the addressed problem, they suffer from computational time. In this paper, we developed a new methodology called Independent Coordinate Coupling Method which can couple two independent coordinate systems for the entire plate domain and the hole. By matching the deflection condition imposed on the expressions, the relationship between the global axes and the local axes is derived. This formula is then used for the calculation of the eigenvalue problem. The numerical results show the efficacy of the proposed method.
곽문규(Kwak, Moon-K.),김기영(Kim, Ki-Young),백광현(Baek, Kwang-Hyun) 한국소음진동공학회 2011 한국소음진동공학회 논문집 Vol.21 No.2
This paper is concerned with the modeling and active controller design for elevator lateral vibrations. To this end, a dynamic model for the lateral vibration of the elevator consisting of a supporting frame, cage and active roller guides was derived using the energy method. Free vibration analysis was then carried out based on the equations of motion. Active vibration controller was designed based on the PID control algorithm and applied to the numerical model. Rail irregularity were considered as external disturbance in the numerical simulations. The numerical results show that the active vibration control of elevator is possible.