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6속 자동변속기용 레펠레티아 유성 치차의 동력 해석에 관한 연구
박진홍(J. H. Park),심재경(J. K. Shim),강봉수(B. S. Kang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
In gear-train design, power-flow analysis is a very important process. The method for power-flow analysis apply the power balance equation and torque balance equation to each fundamental circuit. Then, the equation are solved simultaneously to determine the power-flow in planetary gear train. In this paper we perform power-flow analysis of a 6-speed automatic transmission. With this results are used to represent block diagram. In addition, the efficiencies of epicyclic inversion of the 6-speed automatic transmission is obtained.
이준모(J. M. Yi),심재경(J. K. Shim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Automotive suspension systems are three-dimensional mechanisms; they must be analyzed as three-dimensional mechanisms. Three-dimensional motion can be described by screw system. In this article, the instantaneous screw axis of a multi-link suspension system is derived in terms of joint installation positions of the system. In order to determine the instantaneous screw axis of the wheel hub relative to the vehicle body, the wheel hub angular velocity and the linear velocity of a point on the wheel hub relative to the vehicle body should be obtained. For this purpose, the velocity constraint equations of R-S, S-S and S-C link are derived. Using these equations, the instantaneous screw axis and the suspension parameters are represented in terms of the installation positions. The sensitivities of these analytically represented suspension parameters can be analyzed by direct differentiation. As an example. the sensitivities of a 5 S-S multi--lik suspeension systm aranad.<br/>
임헌영(H. Y. Lim),심재경(J. K. Shim),황규혁(K. H. Hwang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Biped robot has better mobility than other mobile robot, but it is hard to maintain balance during walking. In order to maintain balance, stability analysis is a key point for a biped robot. The zero moment point analysis has been used most in stability analysis. In this paper, we propose different method of stability analysis using wrench system. It is possible to generate a wrench system by applying a force along an axis in space and simultaneously applying a moment about the same axis. Wrench system is equivalent to a force and moment applied along the same axis. We compare the result of wrench system analysis with that of zero moment analysis in biped robot stability using simulation program.
맥퍼슨 스트럿 A형 현가장치의 효율적 설계를 위한 기구학적 해석
김창우(C.W.Kim),심재경(J.K.Shim) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this article, vectonal expressions that describe the motion of a simplified model for the MacPherson-Strut A Type Front Suspension System are derived with respect to a reference coordinate frame. With that expressions, simulations are performed to figure out acceptable combinations of design values of hard points to induce better kinematic behavior of the vehicle and the suspension system. Through this study, a simple algorithm is presented to enable the selection of good design values for the suspension system at the first stage of design procedure.