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인공신경회로망을 이용한 전자비례 감압밸브의 솔레노이드 형상 최적화
윤주호(J. H. Yoon),웬민냣(N. M. Nhat),이현수(H. S. Lee),윤장원(J. W. Youn),김당주(D. J. Kim),이동원(D. W. Lee),안경관(K. K. Ahn) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.6
Unlike the commonly used On/Off solenoid, constant attraction force--which is independent of plunger displacement is a considerably important characteristic to proportional solenoid of the EPPR Valve. Attraction force uniformity is mainly affected by the internal shape design parameters. Due to a number of shape design parameters, the optimal parameter values are very complex and time consuming to find by trial and error method. Much research has been conducted or are still in progress to find the optimal parameter values by applying various optimization techniques like Genetic Algorithm, Evolution Strategy, Simulated Annealing, or the Taguchi method. In this paper, the design parameters which have primary effects on the attraction force uniformity and the average attraction force are decided by main effects analysis of Design of Experiments. Optimal parameter values are derived using finite-element analysis and a neural network model.
이현수(H.S. Lee),윤주호(J. H. Yoon),이소영(S. Y. Lee),윤장원(J. W. Yoon),안경관(K.K. Ahn) 유공압건설기계학회 2017 유공압건설기계학회 학술대회논문집 Vol.2017 No.5
The topic of this paper is regenerative braking which is one part of energy saving of excavator. A study to maximize energy-saving-efficiency is conducted. Firstly, this paper provides mathematical modeling of regenerative braking process in detail and analyzes that in view of energy saving efficiency. Subsequently, a novel regenerative braking algorithm is proposed by using the modeling. Finally, the improvement of energy saving efficiency by proposed algorithm is verified by simulation program, AMESim.