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근접장 정보저장 시스템 광헤드의 오차 분석 및 공차 할당
이준희(Jun-Hee Lee),정재화(Jaehwa Jeong),윤형길(Hyung Kil Yoon),권대갑(Dae-Gab Gewon),김완두(Wan-Doo Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Error analysis and tolerance allocation method for the optical head of Near-Filed Recording (NFR) system are presented. After design and fabrication of NFR system, the performance test for the NFR system is done. Using the optical simulation program, CODEV, the assembly and manufacturing tolerances of the NFR optical head are simulated. The tolerances analysis result shows that the tolerance is very tight. So we propose optimal compound tolerance allocation method using WOW (worst on worst) analysis, RSS (root sum square) analysis and Monte-Carlo analysis.
차량진동에 대한 안정거울장치의 성능향상을 위한 강건설계 및 공차할당
이종원,정호섭,손석만,Lee, Chong-Won,Jeong, Ho-Seop,Sohn, Seok-Man 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.5
In this paper, the robust design and tolerancing of the stabilized mirror is performed to increase its stabilization performance under vehicle vibration. Based on the sensitivity analysis, the seven important control factors are first identified, and then the optimal as well as robust values in the sense of Taguchi method are obtained. Finally, the tolerances associated with each design variables are determined based on a successive sensitivity analysis of the simulated system response so that the deviation in the response from the target value meets the specification requirements. The proposed tolerancing method features that it is a robust but conservative design method and that the computational effort is much less than the Monte Carlo simulation method.
DFFA(Dimensional Fit, Function, Appearance)의 기하공차 해석
송진혁(Jinhyuk Song),김용석(Yongsuk Kim),주용진(Yongjin Choo) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper presents a process of optimizing GD&T(Geometric Dimensioning and Tolerancing) to allocate tolerances for DFFA(Dimensional Fit, Function, Appearance). The Variation Simulation Model using 3DCS is developed to define the sensitivity of each tolerance input, and a Linear Programming Model is introduced to optimize geometric dimensioning & tolerancing. For verfication of the process, front-end area of vehicle is analyzed and improved 29.3% variation for DFFA requirement.
Monte Carlo 방법을 이용한 공초점 주사 현미경의 오차 분석과 정렬 공차 활당에 관한 연구
유홍기(Hong-Ki Yoo),강동균(Dong-Kyun Kang),이승우(Seung-Woo Lee),권대갑(Dae-Gab Gweon) Korean Society for Precision Engineering 2004 한국정밀공학회지 Vol.21 No.2
The errors can cause the serious loss of the performance of a precision machine system. In this paper, we proposed the method of allocating the alignment tolerances of the parts and applied this method to get the optimal tolerances of a Confocal Scanning Microscope. In general, tight tolerances are required to maintain the performance of a system, but a high cost of manufacturing and assembling is required to preserve the tight tolerances. The purpose of allocating the optimal tolerances is minimizing the cost while keeping the high performance of the system. In the optimal problem, we maximized the tolerances while maintaining the performance requirements. The Monte Carlo Method, a statistical simulation method, is used in tolerance analysis. Alignment tolerances of optical components of the confocal scanning microscope are optimized to minimize the cost and to maintain the observation performance of the microscope. We can also apply this method to the other precision machine system.