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안종선(Jongsun An),최수길(Sugil Choi) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
The spool valve is composed of a spool and a sleeve, and it is widely equipped with automobile injectors, an operating lever of a tractor. However, the spool valve that performs linear reciprocating motion is problematic in fluid locking. Several methods have been proposed to solve this problem, and the most representative method is a plurality of grooves are processed in the spool land. Currently, spool valves are widely used in various industrial fields, but theoretical studies of groove processing in spool valve are inadequate, mostly dependent on the experience of the processor. In this thesis, through grasping the flow characteristics along the groove shape of the spool valve, we were trying to select the optimum design specification. We compared and verified by analysis using CFD program and actual test.
안종선(Jongsun An),최수길(Sugil Choi) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Most of existing papers have been related to rotor tooth design such as Gerotor pump trochoid shape design method and tooth design program. However, since the Gerotor pump is configured not only with the rotor but also with the cover, mid and base plate, there are many factors to consider as well as the teeth. In this paper, not only the rotor teeth but also the factors affecting the rotor rotor pump were analyzed and the optimization specifications for each influence factor were examined.
임성혁(Im, Sunghyuck),안종선(An, Jongseon),손은성(Son, Eunseong),이상우(Lee, Sangwoo),허문범(Heo, Moonbeom) 한국항공우주연구원 2017 항공우주산업기술동향 Vol.15 No.1
자동차는 인간의 삶에서 필수적인 도구이다. 하지만 복잡한 교통으로 인해 자동차를 운전하기 위해 소비하는 시간과 노령화에 따른 노인운전자의 증가는 편의와 안전이라는 부분에서 자동차의 효용성을 저하시키고 안전도를 위협하고 있다. 이를 극복하기 위해 자율주행자동차 기술이 개발되고 있고 일부 자율주행단계는 상용화되고 있는 상황이다. 본 논문에서는 현재 자율주행 및 위성항법 기술 현황에 대해 설명하고 자율주행에의 위성항법 적용사례에 대해 서술하였다. With the need of transport and mobilities, cities have evolved to be more and more automobile dependent. Although such changes have made our lives more comfortable, the safety issue is now raising new questions due to the significant increase of elderly drivers and traffic congestion. To overcome these problems, autonomous vehicle technologies are being introduced and emphasized, and efforts to adopt the innovative technologies in the industry and commercial sectors are also increasing. In this paper, we review the current status of autonomous vehicle technology and satellite navigation technology, along with examples where the satellite navigation is applied for autonomous vehicles.
실크아미노산 섭취가 여자 중·고등학교 축구선수의 하지 근 기능에 미치는 영향
최종환(Choi, Jong-Hwan),안종선(An, Jong-Sun),송성우(Song, Sung-Woo) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.5
The purpose of this study was to find out the effect of the eight-week intake of silk amino acids on the muscular functions of the lower limb of female middle and high school soccer players. To achieve the purpose of the study, 20 female soccer players attending Chungju Y Middle School (3grade) and Y High School (1 to 3 grade) were selected as radio sampling methods and divided into experimental groups (10 intake silk) and comparative groups (10 intake placebo). The two groups lived in a dormitory during the intake period, ate the same nutrition, and homogenized the amount of exercise through team training. In the pre-test before the experiment, the subjects were tested for joint continuity to measure their lower extremities’ muscular functions, and eight weeks later, post-testing was carried out in the same way as the pre-test. Data processing was calculated by using the SPSS 12.0 statistics program and the Mann-Whitney U test was used to determine the mean difference between variables. The results showed a significant improvement in maximum muscle strength and muscle endurance compared to those who took placebo in groups that consumed silk amino acids for eight weeks. Therefore, it can be suggested that the eight-week intake of silk amino acids will improve the root function of female middle and high school soccer players and, by extension, provide effective nutrition for soccer players.