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[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.
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.
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.
반응표면모델을 이용한 한국형 고속전철 현가장치의 효율적인 최적설계
박찬경(Park, C.K.),김영국(Kim, Y.G.),배대성(Bae, D.S.),박태원(Park, T.W.) 한국소음진동공학회 2002 한국소음진동공학회 논문집 Vol.12 No.6
Computer simulation is essential to design the suspension elements of railway vehicle. By computer simulation, engineers can assess the feasibility of the given design factors and change them to get a better design. But if one wishes to perform complex analysis on the simulation, such as railway vehicle dynamic, the computational time can become overwhelming. Therefore, many researchers have used a surrogate model that has a regression model performed on a data sampling of the simulation. In general, metamodels(surrogate model) take the form y($\chi$)=f($\chi$)+$\varepsilon$, where y($\chi$) is the true output, f($\chi$) is the metamodel output, and is the error. In this paper, a second order polynomial equation is used as the RSM(response surface model) for high speed train that have twenty-nine design variables and forty-six responses. After the RSM is constructed, multi-objective optimal solutions are achieved by using a nonlinear programming method called VMM(variable matric method) This paper shows that the RSM is a very efficient model to solve the complex optimization problem.
손원희(W.H Sohn),최진환(J.H. Choi),이순걸(S.G Lee),박동창(D.C. Park),류한식(H.S. Ryu),배대성(D.S. Bae),허건수(K.S. Huh) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
An experimental study of dynamic track tension for high mobility tracked vehicle is investigated and compared to multibody dynamic simulation model. This research focuses on a heavy military tracked vehicle which has sophisticated suspension and rubber bushed track systems in computer model of the track tension. In order to obtain accurate dynamic track tension of track subsystems, each track link is modeled as a body which has six degrees of freedom. A compliant bushing element is used to connect track links. Various virtual proving ground models of Chang-Won proving ground are developed to observe dynamic changes of the track tension. The obtained empirical results of the dynamic track tension are comparcd against the simulation studies. <r.B.7]~%<>1 : Tracked Vehicle{;>~£,"j-"J), Trnck Link(;>~£"83), Dynamic Trnck Tension(%"'1 ;>~£"J-;;:j), Compliant Bushing (%<;! .!J!.>-J), DTJS("J-;;:j ~;;<.j A16 ',iJ)