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비선형 현가계 모델을 고려한 승용차 타이어의 동특성 해석
박현만(H. M. Park),이동원(D. W. Lee),김찬중(C. J. Kim),김성래(S. R. Kim),이봉현(B. H. Lee),조춘택(C. T. Cho) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Road noise is becoming more and more important factor in improving customer satisfaction and is not an easy task because of difficulty of compatibility with various performances such as handling, ride comfort and rolling resistance. Vibration properties of suspension system including tire and wheel have a great effect on the vehicle interior noise. Therefore, it is necessary for tire developers to get a knowledge how tire is coupled with suspension in the specific frequency range. Finite element models considering a tire and suspension system have been generally constructed by using spring, damper and concentrated mass elements for the numerical analysis in the low frequency ranges. In this study, the assembly of tire/wheel and suspension system was fully modeled by using continuum elements in order to analyze the coupled dynamic characteristics up to the middle frequency ranges. This finite element model considering the relationship between tire/wheel and suspension system seems to make it effective to predict their dynamic characteristics.
재구성 가능형 모듈러 마이크로 공작기계의 구조형태 창성방법에 관한 연구
최영휴(Y. H. Choi),박현만(H. M. Park),장성현(S. H. Jang),박종권(J. K. Park) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
This study describes a new method of constructing reconfigurable machine tool configuration from a set of modules or components. Our method defines module posture vector for each module and mutual connectivity coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two combined modules can be determined by quadratic form of two associated posture vectors. Furthermore, all of possible RMT configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent posture vectors consecutively. Finally, machining functionality is checked for all the generated machine confirgurations, and useful machine configurations can be selected.
최영휴(Y. H. Choi),박현만(H. M. Park),장성현(S. H. Jang),박종권(J. K. Park) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper proposes a new method to generate feasible machine tool configurations of Modular-Reconfigurable Machine Tool in the preliminary design stage. Proposed method includes the constructing configurations and its machining ability check. Our method defines module posture vector for each module and mutual connectivity coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two combined modules can be determined by quadratic form of two associated posture vectors. Furthermore, all of possible machine tool configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent posture vectors consecutively. To construct the feasible machine configurations using given modules, we defined geometric constructing rules in consideration of the functions and configurations of each module. And, to select the useful machine configurations, we checked the machining ability using the directivity between tool and cutting plane for all the generated machine configurations. Finally, we applied proposed method to generating configuration problem of 3-axes milling machine using 7 modules(spindle table, bed, column, 3-translational slides).
재구성 가능형 모듈러 마이크로 공작기계의 구조형태 창성방법에 관한 연구
최영휴(Y. H. Choi),박현만(H. M. Park),장성현(S. H. Jang),박종권(J. K. Park) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
This study describes a new method of constructing reconfigurable machine tool configuration from a set of modules or components. Our method defines module posture vector for each module and mutual connectivity coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two combined modules can be determined by quadratic form of two associated posture vectors. Furthermore, all of possible RMT configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent posture vectors consecutively. Finally, machining functionality is checked for all the generated machine confirgurations, and useful machine configurations can be selected.
최영휴(Y. H. Choi),박현만(H. M. Park),장성현(S. H. Jang),최응영(E. Y. Choi),김인수(I. S. Kim),박종권(J. K. Park) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.5
This study describes a new method of constructing Reconfigurable machine tools configurations from a set of modules or components. This proposed method defines combinability vector for each module and mutual combinability coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two adjacent modules can be determrined by quadratic form of two associated combinability vectors. Furthermore, all of possible RMT configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent conbinability vectors recursively. Our proposed RMT configuration generating method can be successfully applied to determining all of possible machine configurations from several modules or components at conceptual-or preliminary-design stage.
최영휴(Y. H. Choi),박현만(H. M. Park),장성현(S. H. Jang),박종권(J. K. Park) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
This paper proposes a new method to generate feasible machine tool configurations of Modular-Reconfigurable Machine Tool in the preliminary design stage. Proposed method includes the constructing configurations and its machining ability check. Our method defines module posture vector for each module and mutual connectivity coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two combined modules can be determined by quadratic form of two associated posture vectors. Furthermore, all of possible machine tool configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent posture vectors consecutively. To construct the feasible machine configurations using given modules, we defined geometric constructing rules in consideration of the functions and configurations of each module. And, to select the useful machine configurations, we checked the machining ability using the directivity between tool and cutting plane for all the generated machine configurations. Finally, we applied proposed method to generating configuration problem of 3-axes milling machine using 7 modules(spindle table, bed, column, 3-translational slides).
최영휴,박현만,장성현,최응영,김인수,박종권 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-
This study describes a new method of constructing Reconfigurable machine tools configurations from a set of modules or components. This proposed method defines combinability vector for each module and mutual combinability coefficient matrix for adjacent two modules. All of machine configurations possible to be generated from any two adjacent modules can be determined by quadratic form of two associated combinability vectors. Furthermore, all of possible RMT configurations generating from a series of multiple modules also can be obtained by multiplying quadratic form of two adjacent conbinability vectors recursively. Our proposed RMT configuration generating method can be successfully applied to determining all of possible machine configurations from several modules or components at conceptual- or preliminary- design stage.