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[論文] Curved Taper Leaf Spring의 動特性에 關한 硏究
김찬묵(Chan-Mook Kim),김광식(Kwang-Sik Kim) 한국자동차공학회 1981 오토저널 Vol.3 No.1
In this paper, the natural frequencies of curved taper leaf springs using on vehicle suspen-<br/> sion systems are studied.<br/> By applying the Castigliano’s definition, Rayleigh’s principle and Dunkerley’s equation,new for-<br/> mulas defining the natural frequency of such shaped spring are derived.<br/> Numerical calculations are in very good agreement with experimental results on actual mo-dels. We found that the natural frequencies of curved taper spring are increased by 21-28 % compared with the spring having same weight, span and curve but uniform section.<br/>
모터 토크리플에 기인하는 전동식 조향장치 시스템의 조향감 해석에 대한 연구
김찬묵(Chan-Mook Kim),한정훈(Jeong-Hun Han) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
This paper presents the effects of an assisting motor torque ripple on a driver’s steering feeling using a simulink. The EPS(Electric Power Steering) System is modeled as a 5 degrees of freedom for simulation. To find out the influence of a torque ripple on a driver’s steering feeling, which is the purpose of this study, we observed the assisting torque in various different speeds, when the torque ripple increased by 0%~40%. The torque ripple had a small but definite influence on the assisting torque, and it had a greater influence in low speeds rather than high speeds.