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최병희(B. H. Choi),조예찬(Y. C. Jo),박정현(J. H. Park),최성운(S. W. Choi),조상훈(S. H. Cho),김바다(B. D. Kim),박기협(K. H. Park),김주호(J. H. Kim),이대엽(D. Lee) 유공압건설기계학회 2023 유공압건설기계학회 학술대회논문집 Vol.2023 No.5
In many equipment, including construction machinery that operates with hydraulic oil, it is very important to solve the problem of the generation of fine particles in the hydraulic circuit and the inability to use the equipment due to causes such as damage of parts and repair. In this study, as a base study to solve these problems, a study that can detect the color change of hydraulic oil due to particles mixed in hydraulic oil in real time using machine learning was conducted. Using the k-NN classification algorithm, the color change of hydraulic oil is classified into ten classes so that the color can be recognized in real time. It is planned to carry out the development of the sensor system in the following study.
김종민(J. M. Kim),박정배(J. B. Park),김주일(J. I. Kim),천민우(M. W. Chun),김바다(B. D. Kim),김주호(J. H. Kim),이정호(J. H. Lee),이충근(C. G. Lee),이대엽(D. Y. Lee) 유공압건설기계학회 2018 유공압건설기계학회 학술대회논문집 Vol.2018 No.6
In order to develop a HST rear wheel auxiliary drive, which can be selectively used depending on work environment, a feasibility of HST with driving and steering function was studied for a 3.5 ton class forklift. For accurate control of HST, steering angle and revolutions were precisely measured with potentiometers and encoders, respectively. And the wheel load was measured using load cell to obtain the required power output of the rear wheel. This help accurately control the number of revolutions when make a turn. In order to minimize the decrease of fuel consumption due to the installation of HST, hydraulic energy was regenerated and analytical study using SimulationX was performed for optimization. Also, a standard test cycle to evaluate an improvement of fuel economy by energy regeneration was developed and applied to this study.