http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
유송민 한국공작기계학회 2004 한국공작기계학회 춘계학술대회논문집 Vol.2004 No.-
A flexible disk grinding system process has been introduced that utilized varying disk orientation with respect to workpiece along with the applied feed speed. A known process model mothodologies has been used to fomulate processed surface profiles. Various process conditions including cutting speed, maximum feed speed and orientation angles could applied to observe process outcomes. Even though continuous and constant feed speed has been applied to the process, the results from the trapezoidal input velocity profiles would be observed and compared. Based on the control strategies including neural network methodologies, several output results were compared to find the optimum process condition.
차량 종적 제어 시스템에 관한 연구 : Platoon 전파 Platoon Propagation
유송민 慶熙大學校 材料科學技術硏究所 1995 材料科學技術硏究論集 Vol.8 No.-
In this study, two types of controllers are proposed assuming that information is transmitted through vehicles in sequence. In order to prove system validity, ten vehicle platoon was adopted using vehicle headway and velocity as feedback resources. Some phenomena have been observed concerning various responses depending on the control variable size. Obviously, system response moves from stable to unstable regions as each variable quantity grows. Therefore it is recommended to maintain proper size of control gain to facilitate larger size of platoon.
유송민,최명진,신관수 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-
A flexible disk grinding system process has been introduced that utilized varying disk orientation with respect to workpiece along with the applied feed speed. Various process conditions including cutting speed, maximum feed speed and orientation angles could applied to observe process outcomes. Even though continuous and constant feed speed has been applied to the process, the results from the trapezoidal input velocity profiles would be observed and compared. Based on the control strategies including neural network methodologies, several output results were compared to find the optimum process condition. Two axis control results were displayed showing better performance with higher trajectory error for larger training epoch.
유송민,신관수 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
Several algorithm applied to single axis feed system with linear motor has been extensively reviewed in order to check the possible applicability to two axis system. Among several factors considered, overshoot of the response was the most important one in minimizing position tracking error. Balance between overshoot and settling time has to be adjusted to guarantee to best tracking performance.
유송민 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
In order to analyze linear motor driven feed system, preliminary studies have been conducted focusing on the performance evaluation of the system based on the various combination of control gain along with acceleration. Tentative simulation revealed that due to the complexity of control system, reduced number of control condition is recommended. Actual machining process with conventional feed system using endmill tool was employed as a preliminary study. Several sensing methods including AE, acceleration sensors and tool dynamometer were used. Results revealed the consistency in AE and cutting resistance. There were inconsistent empirical results in accelerometer probably due to the insensitivity of the sensor signal with respect to the experimental system.
디스크 배열변화를 수반한 유연성 디스크 연삭가공에 관한 연구
유송민,선양래 慶熙大學校 材料科學技術硏究所 1994 材料科學技術硏究論集 Vol.7 No.-
A grinding process with flexible disk has been implemented with respect to varying disk orientation. Depending on the process stages, different kinematic relationships were derived including deflection arm length and contact area. Disk orientation has been changed in order to obtain a better product profile close to flat surface sacrificing metal removal rate and depth of cut. Process performance was evaluated and disk trend showing actual disk deflection trend was also visualized.
유송민,박환서 경희대학교 산학협력기술연구원 2004 산학협력기술연구논문집 Vol.10 No.1
A Machining processe for the flange panel has been introduced. Contrary to the conventional methods like Y forming and welding, roll-seaming method has been utilized for better quality and less cost. Several measurement methods including digital image processing have been used to confirm the product quality assurance.
유송민,신관수 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
Linear motor feed system control algorithm was extended to the two axis system. Among several factors considered, overshoot of the response was the most important one in minimizing position tracking error. Balance between overshoot and settling time has to be adjusted to guarantee to best tracking performance. Tracking route was carefully executed to eliminate the possible error during the machining process. Even though there exists slight discrepancy between desired route and cutting track at the corner, precision machining could be implemented using the cutting scheme introduced.