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한복수,박성환,명태식,권경우 大田産業大學校 2001 한밭대학교 논문집 Vol.18 No.-
Precision machining widely bases on the technology connected with machine tools, machining and others. The prototype was designed in the base of the analysis of the precision air bearing spindle which have greate influence upon the machining accuracy of the precision machine. The contents in this study are as follows. 1) Design and manufacture of the spindle system, 2) Performance test of the system. The spindle system is made of aero-static, which has the excellent rotation accuracy was designed and manufactured. As a result of the test (static vibration, dynamic vibration, spindle rotation), the air spindle system was stability. We think that this system can apply to the ultra-precision machine tools.
한복수,김기수 충남대학교 공업교육연구소 1996 論文集 Vol.19 No.1
This paper deals with the ultrasonic vibration cutting for the precision machining of aluminum alloy. When the ultrasonic vibration is applied on the tool, the cutting tool makes periodical contact with workpiece. And, the cutting is performed by vibrating impact force while the cutting tool contacts the workpiece. In this paper, the horn of ultrasonic vibration system were designed and manufactured, to compare the ultrasonic vibration cutting with the conventional cutting, the machined surface roughness of aluminum alloy in turning were experimentally measured. The experiments revealed that the ultrasonic vibration cutting had the best surface roughness than the conventional cutting under the same cutting condition.
韓福洙,朴性煥 한밭대학교 산업과학기술연구소 2001 논문집 Vol.5 No.-
The high speed precision spindle, which is an important element part of industrial machinery such as micro drilling, high speed machine tools and the atomizer. In this study, the aero-static spindle was designed and a stiffness analysis of air bearing was carried out to investigate the optimal design parameter for the high speed spindle.
홍준희,한복수 한국공작기계학회 2003 한국생산제조학회지 Vol.12 No.1
In a high speed spindle system, it is very important to monitor the state of rotating rotor. Particularly in active control spindle system, the position sensor must provide feedback to the control system on the exact position of the rotor. In order to monitor the state of a high speed spindle exactly, high accuracy and wide frequency bandwidth of sensors are important. The focus in this paper is to make a fiber optic sensor for monitoring rotor of magnetic bearing to design the circuit for detecting optical signal, and to evaluation static and dynamic characteristics of fiber optic sensor.
디지탈 영상처리를 위한 데이타 취득 시스템에 관한 연구
박규태,진용옥,김장복,박명구,신태민,김한주 연세대학교 산업기술연구소 1983 논문집 Vol.15 No.2
A computer vision system for recognition and processing any visible objects is designed. Analog video images are digitized and stored in the internal memory of a microcomputer system and these digitized data are output through a bit-image printer. The kirsch edge operator is used for the processing. In order to compare the result of Kirsch edge enhancement, two images "a Man" and "a figure" are tested. Because of the limitations of the speed of A/D converter and the capacity of internal memory, the operation of the system is a still-picture mode. Upper 4 bit date of the memory are used for printing out the image, so as to the gray levels are sixteen. The output size of the bit-image printer is 120x120, and 2 horizontal lines are printed simultaneously per 1 carriage return because the printer has a 8 pin head. The system is designed to have compatibility with any microcomputer system which has a S-100 bus structure.
망막냉동응고술이 초자체출혈의 흡수에 미치는 효과에 대한 실험적 연구
한영복,안정숙,조병채 梨花女子大學校 醫科大學 醫科學硏究所 1991 EMJ (Ewha medical journal) Vol.14 No.1
To evaluate the effects of the anterior retinal cryopexy on the absorption of the vitreous hemorrhage. vitreous hemorrhage was induced in 27 rabbit eyes. 0.1㎖ of autologous venous blood was injected into the vitreous through the sclera 3mm posterior to the corneoscleral limbus with 26 gauze needle. Anterior retinal cryopexy was applied on the sclera anterior to the equator(15 eyes). The treatment consisted of 24 cryopexy applications, applied 360℃ transconjunctivally between the ora serrata and equator. Cryopexy was not applied in the control eyes( 12 eyes). The Results were as follows : 1) Vitreous hemorrhage was completely absorbed in 2/12 eyes in the control group. and 8/13 eyes in the treated group during the observation period. 2) There was no statistically significant difference in the period that the vitreous was cleared to Grade I opacity beteween the control and treated groups. 3) Cataract was developed in the 2 eyes of treated group 5 weeks after anterior retinal cryopexy.
Design of the Control System for Friction of a Robot Arm
Bock Soo Han,Tae Sik Myung 대한공업교육학회 2001 대한공업교육학회지 Vol.26 No.2
In this study, the control of a flexible arm robot was examined by considering the lumped constant model. We proposed the compensation method that can sequentially estimate Coulomb friction disturbance that occurs on the drive shaft. In the friction compensation algorithm, Coulomb friction was estimated by the state equation with the recursive algorithm that was used as a sort of low-pass filters. We evaluated the performance of the system through the experiments. Employing the on-line estimation of and compensation for Coulomb friction, the linear quadratic control was successfully applied to stabilize the system.