http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
멀티 스케일 다중 전개형 협업 로봇을 위한 요소 기술 개발
주종남(Chong Nam Chu),김한(Haan Kim),김정률(Jeongryul Kim),송성혁(Sung-Hyuk Song),고제성(Je-Sung Koh),허승주(Sungju Huh),하창수(ChangSu Ha),김종원(Jong Won Kim),안성훈(Sung-Hoon Ahn),조규진(Kyu-Jin Cho),홍성수(Seong Soo Hong),이동준(Do Korean Society for Precision Engineering 2013 한국정밀공학회지 Vol.30 No.1
Multi-scale mass-deployable cooperative robots’ is a next generation robotics paradigm where a large number of robots that vary in size cooperate in a hierarchical fashion to collect information in various environments. While this paradigm can exhibit the effective solution for exploration of the wide area consisting of various types of terrain, its technical maturity is still in its infant state and many technical hurdles should be resolved to realize this paradigm. In this paper, we propose to develop new design and manufacturing methodologies for the multi-scale mass-deployable cooperative robots. In doing so, we present various fundamental technologies in four different research fields. (1) Adaptable design methods consist of compliant mechanisms and hierarchical structures which provide robots with a unified way to overcome various and irregular terrains. (2) Soft composite materials realize the compliancy in these structures. (3) Multi-scale integrative manufacturing techniques are convergence of traditional methods for producing various sized robots assembled by such materials. Finally, (4) the control and communication techniques for the massive swarm robot systems enable multiple functionally simple robots to accomplish the complex job by effective job distribution.
주종남(Chong Nam Chu),박민수(Min Soo Park) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Creative engineering design course has been offered at Seoul National University since 1993. The purpose of this course is to teach basic skills to design, fabricate and test electro-mechanical device through hands-on experience. The major efforts in this course are on creativity and engineering experience. The course consists of 2 hours of lecture and 2 hours of laboratory (3 credit course). On the first day of the semester, students form teams of five students. At the 3rd week, linkage project is assigned. For 2 weeks, each team makes two simple linkages. At the 6th week, game rules are announced and material kits are distributed for the main robot contest. Each team freely designs and makes one wire controlled robot and one autonomous robot. At the 11th week, robot contest is held using the robots students made during the semester. Final grade is based on the results of the projects, contest, and class/lab attendance.
유리의 미세 초음파 가공 시 입구 진원도 향상 및 출구 크랙방지
홍지훈,김덕환,주종남,김보현,Hong, Ji-Hoon,Kim, Duck-Hwan,Chu, Chong-Nam,Kim, Bo-Hyun 대한기계학회 2007 大韓機械學會論文集A Vol.31 No.10
Ultrasonic machining (USM) is suitable for machining hard, brittle and non-conductive materials such as silicon, glass and ceramics. Usually, when micro holes are machined on glass by USM, roundness of hole entrance is poor and cracks appear around the hole exit. In this paper the machining characteristics were studied for roundness improvement and exit crack prevention. From experiments, the tool bending and the shape of tool tip affect hole roundness. When the tool tip is hemispherical, good roundness of holes was obtained. The feedrate and the rotational speed of the tool affect the exit crack. With the machining conditions of 150 rpm in spindle speed and $0.5\;{\mu}m/s$ in feedrate, micro holes with less than $100\;{\mu}m$ in diameter were machined without an exit crack.
측벽 엔드밀 가공에서 공구 변형을 고려한 형상 오차 예측
류시형(Shi Hyoung Ryu),주종남(Chong Nam Chu) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.6
A method for form error prediction in side wall machining with a flat end mill is suggested. Form error is predicted directly from the tool deflection without surface generation by cutting edge locus with time simulation. Developed model can predict the surface form error about three hundred times faster than the previous method. Cutting forces and tool deflection are calculated considering tool geometry, tool setting error and machine tool stiffness. The characteristics and the difference of generated surface shape in up milling and down milling are discussed. The usefulness of the presented method is verified from a set of experiments under various cutting conditions generally used in die and mold manufacturing. This study contributes to real time surface shape estimation and cutting process planning for the improvement of form accuracy.