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마찰력과 강성을 고려한 사출성형기 5절 토글 링크에 관한 연구
최주용 한국기계기술학회 2014 한국기계기술학회지 Vol.16 No.5
In this paper, the 5 joint toggle link of a injection molding machine is analyzed. Considering toggle link kinematics and frictions at the pin joints, clamping forces for each cross head position are calculated. The maximum clamping force and the install position of a tail-stock are determined by the stiffness of links, plates and tie-bar. The kinematic results of a finite element analysis considering friction and stiffness are compared with measured results.
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최주용,박선영,박민경,김영석,안초롱,김예진,박천석 한국식품과학회 2023 Food Science and Biotechnology Vol.32 No.10
Recently, unconventional yeasts have become popular as fermentation starters in the brewing industry due to the growing consumer demand for aromatic diversity. Specifically, Schizosaccharomyces japonicus has been explored as a potential starter culture for beer and wine production because of its distinct brewing characteristics; however, its application in makgeolli fermentation has not been tested. Therefore, in the present study, two Sz. japonicus strains (SZJ-1 and SZJ-2) were isolated from natural sources, and their brewing characteristics for makgeolli fermentation were compared with those of commercial S. cerevisiae strain. Although the tested isolates showed a lower fermentation and carbon source consumption rate than control-, their overall alcohol fermentation characteristics were suitable for makgeolli production. Regarding flavor composition, Sz. japonicus-fermented makgeolli possessed more ester compounds (e.g., 2-phenylethyl acetate, ethyl acetate, and ethyl decanoate) than S. cerevisiae-fermented makgeolli. Therefore, Sz. japonicus can be used as an alternative culture starter in makgeolli fermentation.
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Robust controller for an autonomous vehicle with look-ahead and look-down information
최주용 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.10
For the lateral control of an autonomous vehicle, this paper proposes a linear-matrix-inequality (LMI)-based H_∞ control algorithm that utilizes the feedback of the lateral offset and target yaw angle at the preview point, which is effective for the fusion of look-ahead and look-down sensors. To verify the performance of this controller, lane change and circular lane tracking simulations are carried out in multi body dynamics. Against the uniformly random noises in position and yaw angle and the constant modeling uncertainties in mass and cornering stiffness, the robustness of the proposed algorithm is compared with the cubic curve method and the heading angle method at the look-ahead target lane.
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반응표면분석법에 의한 사출성형기 5절 토글 링크의 최적설계
최주용 한국기계기술학회 2014 한국기계기술학회지 Vol.16 No.6
In this paper, the 5 joint toggle link of an injection molding machine is optimized. A model considering toggle link kinematics, frictions at the pin joints, and stiffness is verified by a finite element analysis(FEA) and a measured result. The FEA was carried out by the commercial FEA software ANSYS and the clamping force was calculated by measuring the tie-bar deformation of the molding machine. The influence on the maximum clamping force and stroke ratio are analyzed for the length variations of links. Based on the mathematical model and design parameter, the clamping force, the stroke ratio, and the maximum stroke of moving plate are optimized by using the response surface method(RSM) for the length of the toggle link, where the lager-the-better, the norminal-is-best, and the smaller-the-better characteristics are applied for the clamping force, the stroke ratio, and the maximum stroke of moving plate.
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