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수치해석 프로그램을 이용한 미디어 이송 장치의 기구학적 최적설계
이순걸(S. G. Lee),최진환(J. H. Choi),배대성(D. S. Bae),조희제(H. J. Cho),송인호(I. H. Song),김민수(M. S. Kim) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This paper shows the design optimization of the paper feeding mechanism under dynamic behavior by using commercial codes of RecurDyn/MTT2D and RecurDyn/AutoDesign which are developed by FunctionBay, Inc. A virtual mockup for dynamics analysis of the paper feeding mechanism is build on RecurDyn/MTT2D and is simulated. Flexible paper is represented as a series of rigid bars connected by revolute joints and rotational spring dampers. Paper is fed by a contact and friction mechanism on rollers or guides. The slip of the paper and nip force of rollers are measured to estimate the system performance. After a simulation, these performances are automatically send to RecurDyn/AutoDesign which is a sequential approximate optimization tool based on the response surface modeling. RecurDyn/AutoDesign makes the approximate objective function and computes the optimized design points of the design variables and gives them to analysis tool. And then the simulation is repeated with the updated design variables. These processes are repeated until finding a tolerable design optimization. In this paper, a paper feeding mechanism is introduced and it is optimized with the proposed algorithms.
[論文] 독립 일반화 좌표에 의한 차륜 차량의 Hamilton 운동 방정식에 관한 연구
양성모(S.M.Yang),배대성(D.S.Bae),원용석(Y.S.Won) 한국자동차공학회 1992 오토저널 Vol.14 No.3
This task is to derive the Hamiltonian equations of motion for BMW 323i vehicle. The kinematic relationships are defined. The cut constraint equations are derived. The Hamiltonian equation of motion are developed. The constant mass matrices are identified. The cut constraint equations are stabilized. The stabilized constraint equations are used to derive the relationships between the independent and dependent coordinates. The Hamiltonian equations of motion are reduced only in terms of the independent generalized coordinates.
서원상(W.S. Seo),김경진(K.J. Kim),구만회(M.H. Koo),배대성(D.S. Bae),김종봉(J.-B. Kim) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
A structure-explosives coupled analysis is sometimes needed in defence area. Direct explosion analysis with structure deformation can gives accurate informations. However, the direct analysis of explosion with structure deformation require large computation costs due to huge impedance difference of explosive and structure. In many cases, fast and fairly good analysis results are preferred than late accurate results. In that cases, pre-defined pressure function during explosion can be used instead of direct explosion analysis. The explosion pressure is a function of distance from the ignition point, explosive mass, and time. In this study, the explosive pressure function is generated using explosion analysis results.