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가상 자전거 시스템을 이용한 노인의 자세균형 증진에 관한 연구
권대규,윤영일,박용군,김남균,Kwon, Tea-Kyu,Yoon, Young-Il,Piao, Yong-Jun,Kim, Nam-Gyun 대한의용생체공학회 2007 의공학회지 Vol.28 No.5
In this paper, a new rehabilitation training system was developed to improve equilibrium sense of the elderly by combining virtual reality technology with a fixed exercise bicycle. In order to evaluate the effectiveness of the training system, the elderly participated as test subject in the investigation of the influence of different the parameters on postural balance control. We measured three different running modes of virtual bicycle system with two successive sets. The parameters measured were running time, velocity, the weight movement, the degree of the deviation from the road, and the variables about the center of pressure. The repeated training, our results showed that the running capability of the elderly improve compared. In addition, it was found out that the ability of postural control and the equilibrium sense was improved with the presentation of the visual feedback information of the distribution of weight. From the results of this experiment, we showed that our newly developed system might be useful in the diagnosis of equilibrium sense or in the improvement of the sense of sight and, somatic, and vestibular sense of the elderly in the field of rehabilitation training.
회전하는 알루미늄 환봉의 미세입자 분사가공시 통계적 방법에 의한 분사조건에 대한 연구
권대규(Dae Kyu Kwon),왕덕현(Duck Hyun Wang) 한국기계가공학회 2017 한국기계가공학회지 Vol.16 No.2
An experimental study of micro blasting for a rotating aluminum rod was conducted through the statistical analysis of ANOVA to obtain the effect of blasting conditions. The rotating equipment was designed and constructed with forward and backward moving for helical blasting, but rotation was used in this study. The blasting condition factors were the type of abrasive particle, nozzle diameter, pressure, standoff distance, injection time, etc. The width of the surface, the maximum depth of the sprayed surface, and ANOVA were analyzed by statistical analysis. The results showed that the contributions of the main factors were pressure, nozzle diameter, and injection particle.
미세입자 분사가공시 직교배열표의 통계적 분석에 의한 표면형상의 최적 분사 조건
권대규(Dae-Gyu Kwon),왕덕현(Duck Hyun Wang) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.4
A study on the micro particle blasting was conducted to find the optimum conditions of the blasted surface of aluminum 6061. The particle type such as Al₂O₃ and SiC, nozzle diameter, pressure, standoff distance and injection time were used as blasting conditions. Statistical method of orthogonal arrays(ANOVA) was used to find optimum conditions of maximum depth and maximum diameter of blasted surface. Particle type, nozzle diameter, and pressure were found to be the main factors of maximum blasted depth and diameter. Maximum blasted diameter was affected by increasing pressure and nozzle diameter but saturated maximum diameter. Maximum blasted depth was affected by pressure and nozzle diameter when aluminum 6061 was blasted with Al₂O₃ particle. The value of surface roughness was increased as pressure and nozzle diameter increased when aluminum 6061 was blasted with SiC