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고진공 터보 분자펌프용 자기베어링 시스템의 후방향 원추모드(Precession) 제어기 설계
배완성,노승국,박종권,홍준희 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
The active magnetic bearing system for a TMP consists of four couples of magnets, five gap sensors with its amplifiers and a digital PID controller. For stabilizing and providing damping, digital PID controller is applied for each 5 control axes and the inter-axis cross feedback controller is also applied to suppress low frequency vibration caused by gyroscopic moment of the rotor. Therefore in this paper, a digital controller of magnetic bearing for a TMP is design and examined.
고진공용 터보 분자 펌프의 자기베어링 시스템 설계 연구
배완성(W. S. Pae),노승국(S. K. Ro),경진호(J. H. Kyung),박종권(J. K. Park),홍준희(J. H. Hong) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
An active magnetic bearing spindle system for TMP is designed and its some dynamic performances are investigated. The AMB system consists of four couples of magnets, five gap sensors with its amplifiers and a DSP controller. The dimensions of AMB elements are determined by magnetic circuit theory simulation and it own desired specifications. A decentralized direct feedback PID controller is utilized to control the dynamics of the magnetic bearings. The designed AMB spindle system is manufactured, and its dynamic characteristics such as its own stability and frequency response functions are investigated by simulation and verified by some experiments.
서울시 보건소 물리치료사들의 지역사회중심재활에 대한 인식
김찬문,홍완성,배성일,Kim, Chan-Mun,Hong, Wan-Sung,Bae, Sung-Il 대한물리치료과학회 1998 대한물리치료과학회지 Vol.5 No.1
To survey the recognition of Community Based Rehabilitation(CBR) by Public Health Center(PHC) Physical Therapists in Seoul Province. This study analysed general characteristic of Physical Therapists and cognition, participation, education, problems and requirements for CBR. The subjects of this study were 31 therapists who work at PHC in Seoul Province and Seoul City Childerns Municipal Hospital. Data was collected for 18 days from April 13 to 31, 1998 and results computed from 25 responses. First, Female therapists outnumber males. The age category 30 to 35 old represented 44.0% of the total number studied. 48.0% of therapists had worked more than 7 years and therapists usually 84.0% worked from 3 to 4 years at the PHC. Junior colleage graduates were 72.0%, and respondents with family responsibility were 52.0%. Second, Recently pain control and therapeutic exercises has become the major requirement of patients at PHC(56.0%). If the offered expanded services, a rehabilitation programe at PHC(36.0%) was highly. When asked about a working guide book, nobody had one. Third, 64.0% of therapists were aware of the present level of CBR, 28.0% of them had gotten an information from newspaper and mass media. Fourth, For CBR, 72.0% had positive ideas in which they could participate. 56.0% wished to compose a team of various rehabilitation specialists. 52.0% wished for the meeting day to be flexible and 64.0% desired to meet once or twice a week. Fifth, Almost all(92.0%) desired more educational opportunity about CBR. Example, once or twice a year(48.0%) and training period of 4 to 7 day(44.0%). They wanted to learn theory and parctice together(88.0%) and 48.0% wanted national mutirehabilitation center as a educational managing organization. Sixth, The most important requirement for accomplishing CBR by Physical Therapists was job security and adequate number of therapists(48.0%). Required number of physical therapists in the PHC was 3(52.0%). The cooperative agency should be the distict govement(32.0%) and community welfare center of the disabled persons(32.0%). Factors inhibiting the execution of CBR were lack of physical therapists(56.0%), and equipments for pain control and for therapeutic exercises(68.0%).
호흡기계 물리치료가 뇌졸중환자의 폐 기능 증진에 미치는 영향
김재현,배성수,홍완성 대한물리치료학회 2000 대한물리치료학회지 Vol.12 No.2
The purpose of this study was to determine whether respiratory physical therapy might increase the pulmonary function of the patients with stroke or not. Twenty patients with stroke were randomly assigned to experimental and control group. During four weeks, both groups participated in the conventional physical therapy and only the experimental group added in a program of respiratory physical therapy. Respiratory physical therapy consisted of chest mobilization, resistive ventilatory muscle training used the method of PNF technique and relaxed diaphragm breathing. Baseline and post-test measurements were made of vital capacity, inspiratory capacity, expiratory reserve volume, forced vital capacity, forced expiratory volume at one second, FEVI/FVC(%) and maximal voluntary ventilation. Ater four weeks, the experimental group showed the significant improvement in VC(p$lt;.05), FVC(p$lt;.05), FEVI(p$lt;.05) and MVV(p$lt;.05). However, the control group showed no significant difference. As compared th the relationship of dependent variables between the experimental group and control group, experimental group showed the significant difference in VC(p$lt;.01), FEVI(p$lt;.05) and MVV(p$lt;.05). These findings suggest that respiratory physical therapy can be used to improve pulmonary function in stroke patients. Also, respiratory physical therapy should be performed for at least four weeks and be followed by the continuous respiratory exercise programs.
고속주축 모니터링용 광파이버 변위센서의 파이버 특성에 따른 센서 성능 연구
박찬규,신우철,배완성,홍준희,이동주 한국공작기계학회 2003 한국공작기계학회 추계학술대회논문집 Vol.2003 No.-
To make high speed spindle system work properly, sensors with outstanding resolution and dynamic characteristics are essential. An optical fiber displacement sensor is based on simple principles. Electrical signal responds to the optical flux change due to the displacement change between a target and a sensor probe. In this paper, the performance of optical fiber displacement sensor has been investigated according to properties of optical fiber. Firstly, optical loss has been measured before and after polishing optical fiber endface. Secondly, allowance of optical fiber bending has been tested. thirdly sensitivity and linear range of the sensor has been found out according to the shape of cross section of optical fiber.