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임경화,안채헌,양손,한완희,범희락,Rim, Kyung-Hwa,An, Chae-Hun,Yang, Xun,Han, Wan-Hee,Beom, Hee-Rak 한국반도체디스플레이기술학회 2009 반도체디스플레이기술학회지 Vol.8 No.4
A SMT mounter is a kind of equipment that mounts SMD parts quickly on the printed circuit board. By using linear motors, it is controlled with high speed and precision, which is similar to semi-conductor and display process equipment. It is necessarily used in an assembly process of an electronic device. Mobile devices such as a mobile phone and PDA are required to reduce mount areas due to the demands for high performance and small size. Hence, super small sized and complex mobile devices have been developed. To improve the productivity of the corresponding equipment, designs with large sized, high speed, and multidisciplinary functions have been consistently performed. Meanwhile, a design trend of large size and light-weight on SMT mounter causes a low natural frequency of systems and vibration problems at the high speed operation. In this paper, the dynamic characteristics of the SMD mounter system were investigated through a modal test and transmissibility test, and verified by finite element method. Also, various design improvement was performed to avoid the resonance phenomena.
에듀테크 기반 평생직업능력개발 선도사업 모델 수립방안 연구
임경화,신정민,김주리,Rim, Kyung-hwa,Shin, Jung-min,Kim, Ju-ri 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.2
In this study, the role and function of Edutech, as well as the application and expectations in the field of future vocational competency development, were gathered to define Edutech as a comprehensive working definition. Based on this redefinition of Edutech, this study analyzes Edutech technology trends and examines the level of actual technology applied to education and vocational training based on written interviews with experts, and finds out significant implications from the point of view of vocational training. Finally we propose an Edutech-based Vocational Education and Training Model.
임경화(Kyung-Hwa Rim),정진호(Jin-Ho Jung),범희락(Hee-Rak Beom) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
Dynamic characteristic analysis is required in developing SMT mounter system with high installation speed and position precision, because of vibration source occurred by positioning head. This paper presents the method of improving dynamic characteristic of SMT(Surface Mount Technology) mounter with finite element method and modal test. The design direction is that natural frequencies of SMT mounter must be higher than the vibration source. In addition, the effect of input shaping on residual vibration reduction is investigated by simulating the response of a first-order system.
임경화 ( Kyung Hwa Rim ),박근윤 ( Geun Yun Park ),유호민 ( Ho Min Ryu ),최우철 ( Woo Cheol Choi ),문승준 ( Seong Jun Moon ),신혜정 ( Hye Jung Shin ) 한국실천공학교육학회 2010 실천공학교육논문지 Vol.2 No.2
진동학은 움직이는 기계 구조물의 설계에 기본이 되는 학문으로 진동 절연, 흡수 등에 관한 방법론과 현장에서 발생하는 다양한 진동문제에 대한 해석 수행 능력을 배우는 학문이다. 하지만 진동학은 기계공학에서 다른 역학과 목들에 비해 이해하기 어려운 교과목이기 때문에 진동학 이론의 물리적인 이해를 돕기 위해 진동학 관련 교육장 비 개발이 매우 필요한 상황이다. 이에 본 논문에서는 진동학의 이론적인 내용을 실험을 통하여 학생들이 보다 쉽게 진동학의 물리적인 의미를 깨달을 수 있도록 도와주는, 그리고 실험과정이 간단한 교육용 복합 진동실험장치를 개발하고 그 적용효과를 알아보고자 한다. 다자유도 진동, 보 진동, 현 진동 및 판 진동의 4가지 대표적인 진 동현상을 실험할 수 있는 복합 진동실험 장치를 개발하고 적용범위를 제시한다. 마지막으로 설문조사를 통하여 학 업성취 반응도평가 및 개선방안을 제안한다. As the basic knowledge during designing most moving mechanical structures, vibration engineering is a subject teaching the theory on vibration control and isolation, which also cultivating the ability of analyze variety of vibration problems. However, vibration engineering is more difficult to understand than other dynamics courses in mechanical field, so the development of educational equipments in order to help understanding physical theory of vibration is really necessary. So in this paper we could see the effect after doing simple experiment process using the educational vibration equipment with multiple function, students could easily understand physical theory of vibration. The educational vibration equipment with multiple function and its application range are introduced, which could performance four kinds of typical vibration phenomenon: vibration of multidegree of freedom system, vibration of beam, vibration of beam, and vibration of plate. Finally, assessments of response and improvement plan are proposed through a survey.
포스트 코로나 시대, 플랫폼을 활용한 공학교육의 활성화
임경화(Kyung-Hwa Rim) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Recently, as collective education has become difficult due to the corona19 infection in domestic universities, interest in online education has increased, and furthermore, there is a need to use online education while self-producing e-learning contents or real-time interactive education. In this study, in order to examine the changes in engineering education in the post-corona era, we will look at the new normal form of engineering education centered on a customized education model operated as an online platform