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지게차 제동장치 시스템의 강도설계를 위한 Procedure 개발
유홍희(H.H. Yoo),박근배(K.B. Park),신상호(S.H. Shin),김태일(T.I. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
A strength design procedure for the brake system components of a folklift car is presented in this paper. Vehicle dynamics, brake system kinematics, and brake system component force analysis are integrated into the design procedure. Several design parameters such as stopping distance, maximum deceleration, and maximum torque generated by pedal force are considered in this procedure.<br/> <br/>
열차 동역학에서 기구학적 비연성을 이용한 분할 해석 방법
박정훈,유홍희,황요하,김창호,Park, J.H.,Yoo, H.H.,Hwang, Y.H.,Kim, C.H. 한국철도학회 1999 한국철도학회논문집 Vol.2 No.1
In this paper, an efficient and accurate formulation for the transient analysis of constrained multibody systems is presented. The formulation employs Kane's method along with the null space method. Kane's method reduces the dimension of equations of motion by using partial velocity matrix: it can improve the efficiency of the formulation. Furthermore, the formulation partitions the coefficient matrix of linear and nonlinear equations into several sub-matrices using kinematic uncoupling. This can solve the equations more efficiently. The proposed formulation can be used to perform dynamic analysis of systems which can be partitioned into several sub-systems such as train systems. One numerical example is given to demonstrate the efficiency and accuracy of the formulation, and another numerical example is given to show its application to the train systems.
현가장치 설계용 Graphic User Interface 프로그램 개발
김희관(H. K. Kim),유홍희(H. H. Yoo) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
A graphic user interface program for the design of vehicle suspension system is developed in this work. Graphic templates are designed by using a graphic language and a library and given to users for interactive data input. Several suspension types are graphically given, and the information of hard points can be directly provided on the graphic templates by users. The information is saved in a data structure which can be efficiently accessed, and transformed into another data format. The data transformation is for the interface to an analyzer by which suspension design characteristics can be calculated.<br/>
열차 동역학에서 기구학적 비연성을 이용한 분할 해석 방법
박정훈(J. H. Park),유홍희(H. H. Yoo),황요하(Y. Hwang),김창호(C. H. Kim) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
In this paper, an efficient and accurate formulation for the transient analysis of constrained multibody systems is presented. The formulation employs Kane"s method along with the null space method. Kane"s method reduces the dimension of equations of motion by using partial velocity matrix: it can improve the efficiency of the formulation. Furthermore, the formulation partitions the coefficient matrix of linear and nonlinear equations into several sub-matrices using kinematic uncoupling. This can solve the equations more efficiently. The proposed formulation can be used to perform dynamic analysis of systems which can be partitioned into several sub-systems such as train systems. One numerical example is given to demonstrate the efficiency and accuracy of the formulation, and another numerical example is given to show its application to the train systems.