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남권선(K. S. NAM),최종필(J. P. CHOI),김병희(B. H. KIM),이낙규(N. K. LEE) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
This paper presents the fabrication of inchworm motor for high precision actuator system of large displacement and high force. The inchworm motor consist of a extending actuator that provides displacement of tool guide, and two clamping actuators which provide the holding force. PZT element have low tensile strength and shear. So often fail under tensile and shear stress. To prevent failure, the pre-load housing was designed and fabricated to the optimal design condition according to the variation of the hinge stiffness by FEM(Finite Element Method) analysis. This is open-loop control and input voltage signals are three square wave of 50~60 percent duty cycles at each of the PZT elements. Also the dynamic characteristics of the system was verified by experiment results of the inchworm motor.
남권선(Nam Kwon Sun),최종필(Choi Jong Pil),김병희(Kim Byeong Hee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
This paper presents the fabrication of inchworm motor for high precision actuator system of large displacement and high force. The inchworm motor consist of a extending actuator that provides displacement of tool guide, and two clamping actuators which provide the holding force. PZT element have low tensile strength and shear. So often fail under tensile and shear stress. To prevent failure, the pre-load housing was designed and fabricated to the optimal design condition according to the variation of the hinge stiffness by FEM(Finite Element Method) analysis. This is open-loop control and input voltage signals are three square wave of 50~60 percent duty cycles at each of the PZT elements. Also the dynamic characteristics of the system was verified by experiment results of the inchworm motor.
남권선(K. S. NAM),최종필(J. P. CHOI),김병희(B. H. KIM),이낙규(N. K. LEE) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
This paper presents the fabrication of inchworm motor for high precision actuator system of large displacement and high force. The inchworm motor consist of a extending actuator that provides displacement of tool guide, and two clamping actuators which provide the holding force. PZT element have low tensile strength and shear. So often fail under tensile and shear stress. To prevent failure, the pre-load housing was designed and fabricated to the optimal design condition according to the variation of the hinge stiffness by FEM(Finite Element Method) analysis. This is open-loop control and input voltage signals are three square wave of 50~60 percent duty cycles at each of the PZT elements. Also the dynamic characteristics of the system was verified by experiment results of the inchworm motor.
임재홍, 정혜령, 우영희, 김명진, 주형선, 정연희, 권선아, 남나라, 이은경, 양유정, 김화민, 김상홍, 최용득 한국방송통신대학교 2017 정책과제 Vol.2017 No.-
방송대 원겨교육연구소(이하 연구소)가 1977년 '통신교육연구소'라는 명칭으로 설립된 이래 올해로 설립 40주년을 맞이함에 따라 이 연구를 통해 지금까지 연구소의 성과를 진단하고 향후의 발전 계획을 새롭게 수립하고자 함 - 이를 위해 지난 40여 간의 주요 변화를 연구소 관련 규정들을 살펴보고 이를 시기별로 구분하여 분석하였고, 최근 연구소가 수행한 정책연구와 주요 사업을 분석하여 성과와 한계, 그리고 개선을 위한 실천과제를 제안하였음 - 이러한 분석 결과를 토대로 중장기적인 연구소의 미래 발전계획을 제시하였음
손재엽,남권선,김병희 강원대학교 산업기술연구소 2005 産業技術硏究 Vol.25 No.B
Manufacturing methods of Nano particles can be distinguished by top-down technology as physical method and bottom-up technology as chemical synthetic method. Top-down technology is a kind of method for making microstructure as like carving after forming a macroscopic structure in advance and its typical methods are ball milling, gas condensation method and so on. Nano Particles synthesized by bottom-up method have got to do dispersing process for using them as actual nano particles because their viscosity are very strong and so easy to shape cohesive substances. Therefore, this study is about a particle separating device which separates a certain constant size of grains processed already in mill and mixer because we mostly use media agitating mill as a device of milling and dispersing and we necessarily use very slight balls as media for manufacturing nano particles in the machine. The centrifugal device has been designed for passing and separating below a certain type of grain size after final process of particles in the mill.
김병희,남권선,최종필,김헌영,이낙규 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
In this paper, a new type of inchworm motion actuator is developed in fabrication of actuators for micro-press machine. This is consisted of three piezoelectric actuators, one is for moving the tool guide and the other are for clamping the guide. The inchworm motor provides both high load and large displacement in small size actuator. PZT has compressive strength and often fails under tensile stress and pulling. Thus, in order to prevent failure, we have designed pre-load housing and accomplished FEM analysis. The pre-load housing was used for determining the optimal design condition by comparing the von-mises stresses with the change of hinge stiffness. Also, in order to predict the performance of the motor under certain conditions, the system model was simulated using MATLAB. This is open loop control actuator and driven by the period of input voltage.
신홍규,이영수,남권선,김병희 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
The bio-micro pin has been usually used for the biochemistry analysis. The manufacturing capability of the micro-pin and the their array with the effective and low-cost way is very important and it gives great economical benefits to developers. The micro-pin is composed of the sample channel for holding the liquid with the fixed volume, the flat tip which determines the printing quality and the pin head for preventing the rotation of the pin in the holder. In this study, we have manufactured newly designed micro-pins by the wire-EDM process with special jigs, and analyzed liquid holding and printing characteristics with respect to the variation of the shape and the tip size of the micro-pin.
김병희,전성건,남권선,김헌영,전병희 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
Ultrasonic machining is effective for machining of extreme hard and brittle materials, including glass, ceramic, carbide, graphite. The major machining principle involves the direct hammering as well as the impact of abrasive particles on the workpiece. Also, it involve cavitation erosion. The general workpiece is flat side. This study attempted micro hole machining of a curved surface of glass tube. Ultrasonic machining is fault of the slow machining speed. An experiment does and got 16 seconds validity machining time as increasing the processing speed. Moreover, entrance crack and sur face roughness was similar both machining speed is slow and fast. Several micro hole of glass tube machined using one micro tool, but tool wear is infinitesimal.
김병희(B. H. KIM),남권선(K. S. NAM),최종필(J. P. CHOI),김헌영(H. Y. KIM),이낙규(N. K. LEE) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.5
In this paper, a new type of inchworm motion actuator is developed in fabrication of actuators for micro-press machine. This is consisted of three piezoelectric actuators, one is for moving the tool guide and the other are for clamping the guide. The inchworm motor provides both high load and large displacement in small size actuator. PZT has compressive strength and often fails under tensile stress and pulling. Thus, in order to prevent failure, we have designed pre-load housing and accomplished FEM analysis. The pre-load housing was used for determining the optimal design condition by comparing the von-mises stresses with the change of hinge stiffness. Also, in order to predict the performance of the motor under certain conditions, the system model was simulated using MATLAB. This is open loop control actuator and driven by the period of input voltage.