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밭 농업용 무한궤도 기반 주행 플랫폼 개발 및 성능 분석
김택진,전현호,아윱,최장영,김용주 사단법인 유공압건설기계학회 2023 드라이브·컨트롤 Vol.20 No.4
We developed a crawler-based driving platform that can perform harvesting, transportation, pest control, and rotary operation by equipping it with various implements, and analyzed its performance. This single platform was developed to perform as pepper harvester, peanut harvester, and transporter with a 46-kW engine. A simulation model was developed to study the specifications of the platform, and the accuracy was also analyzed. The absolute percentage error ranged from 0.2 to 5.9%, which made it possible to predict the platform performance using simulation model. In T-test, both torque and speed on field and asphalt showed a significant difference (1%). Driving torque required differed depending on the nature of the field, and the speeds also changed based on soil load. The developed platform has the advantage of being equipped with a variety of working tools, expected to be used to harvest root crops in the future.
임재관(Jaekwan Im),아윱(Windarko Novie Ayub),최재호(Jaeho Choi),정교범(Gyo-Bum Chung) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
하이브리드 자동차용 리튬이온 전지의 전기적 특성의 모델링은 자동차 전기에너지 공급시스템의 특성을 파악하는데 매우 중요하다. 본 논문은 리튬이온 전지의 동적특성을 모사하기 위한 전기적 등가 모델을 제안하였다. 리튬이온 전지의 모델 파라미터는 Maccor 8500 충방전시험장치를 이용하여 측정하였으며, 측정된 데이터와 Takacs 함수를 사용하여 전지의 충방전 특성을 고려한 비선형 모델을 정의하였다. 제안된 전지모델의 PSiM 모델을 개발하고 시뮬레이션 결과와 실험결과를 비교하여 제안된 모델의 타당성을 검증하였다.
엔진 부하율에 따른 트랙터 경운 작업 시 배기가스 분석
이준호,전현호,백승윤,백승민,김완수,아윱,김용주 사단법인 유공압건설기계학회 2022 드라이브·컨트롤 Vol.19 No.4
This is a basic study analyzing emissions of an agricultural tractor during tillage operations. In this study, CO, THC, NOx, and PM considered as emission factor were analyzed during plow and rotary tillage operation by the tractor. Engine torque and rotational speed were measured through ECU. Engine power was calculated using engine torque and rotational speed. The emissions was calculated based on the number of units, rated power, load factor, and operating time. Results showed that the load factor was calculated almost twice, which was higher than 0.48. It was also observed that the emission of the tractor was variable for different agricultural operations because tractor loads were different based on operations. There was a difference in emissions due to differences in plow and rotary working hours. To estimate the emission of agricultural tractor based field operations in detail, it is necessary to consider TAF (Transient Adjustment Factor) and DFA (Deterioration factor). In the future, TAF and DFA will be considered to estimate emissions of the agricultural tractor. Finally, results of this study can contribute to the literature to estimate tractor emissions accurately.
김완수,김용주,백승민,백승윤,문석표,이남규,김택진,엠디 아부 아윱 시디크,전현호,김연수 사단법인 유공압건설기계학회 2020 드라이브·컨트롤 Vol.17 No.2
The purpose of this study was to analyze the effect of the soil cone index (CI) on the tractor work load. A load measurement system was constructed for measuring the field data. The field sites were divided into grids (3×3 m), and the cone index was measured at the center of each grid. The work load measured through the plow tillage was matched with the soil cone index. The matched data were grouped at 600 kPa intervals based on the cone index. The work load according to the cone index was analyzed for engine, axle, and traction load, respectively. The results showed that when the cone index increased, engine torque decreased by up to 9%, and the engine rotational speed and brake-specific fuel consumption increased by up to 5% and 3%, respectively. As the cone index increased, the traction and tillage depth were inversely proportional to the cone index, decreasing 7% and 18%, respectively and the traction and tillage depth were directly proportional to the cone index, increasing 13% and 12%, respectively. Thus, it was found that the cone index had a major influence on the engine, axle, and traction loads of the tractor.