• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 추계학술대회 논문집
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• pp.487-488
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• 2006

• Journal of the Korean Data and Information Science Society
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• 제15권4호
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• pp.707-716
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• 2004

Recently, many areas of application such as statistics and industrial engineering are interested in the effective education of databases. In this article we design and implement a database learning system based on learner management techniques. The system supports a personalized/ team-centered learning environment, monitoring the learning attitude of learners, and a method for the assessment.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.1223-1225
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• 2002

This paper has described in Electric Vehicle Battery Management System(EV BMS). EV BMS manages the input/output energy of the traction battery, and provides the optimum environment condition during charging/ driving through the communication with other controllers. In this paper, we introduce our BMS for Santa Fe EV. Hyundai Motor Company has been developed EV since 1990. Recently, Santa Fe EV has been demonstrating with the environmental friendly technology. Two year real road testing program with electric powered Santa Fe is being undertaken by HMC in Hawaii.

• 한국추진공학회지
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• 제21권2호
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• pp.102-110
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• 2017

발사대시스템의 산화제공급계(Liquid Oxygen Filling System)는 발사체의 추진제(Propellant) 중 연료의 연소를 위한 산화제(Oxidizer)로 사용되는 액체산소(Liquid Oxygen)를 저장하고, 발사체 요구조건에 맞게 공급하는 하는 설비이다. 본 논문에서는 한국형발사체(KSLV-II) 발사대시스템 상세설계(Critical Design, 2015년 8월에서 2016년 4월, 8개월) 동안 수행된 한국형발사체 발사대시스템 추진제 공급설비의 산화제공급계 설계 내용을 주요 설비 구성에 대하여 구조적 관점으로 소개한다.

• 한국수소및신에너지학회논문집
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• 제35권4호
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• pp.353-362
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• 2024

In this study, several studies were conducted on the construction of gas conversion process system for a pilot plant using a small-scale hydrogen liquefaction system. The pilot plant considered in this study includes a liquefier, a storage tank, an evaporator, a gas booster, and a gas storage tank. First, the suspected leak area of the container was checked using the sprayed method of helium gas. The small-scale hydrogen liquefaction system was designed based on the analysis results of the pre-cooling system and the liquefaction system. Additionally, the program was developed to maintain pressure within vessel for an automatic production of liquid hydrogen. The evaporator for liquid hydrogen was manufactured based on the designed analysis data, and the pollution of gas in the vessel was analyzed through a gas recovery line system.

• 공학교육연구
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• 제16권3호
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• pp.51-60
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• 2013

The paper addresses an issue of industry-joint engineering education paradigm with the purpose of setting a new standard for engineering education by development and support of competitive curriculum for the interdisciplinary team-based product development, a specialized and innovative engineering education program. In the department of MSDE (Mechanical and System Design Engineering), students are educated via three major courses for targeting engineering design, Creative Engineering Design (freshman), Design Process (Senior), and Creative Product Development (Junior). All these courses are based on personal tool exercises for design software and hardware and team-project group activities of the students with other team members. This paper will briefly discuss the main focuses of these courses and case studies of the teaching results targeting the development of telecommunication device.

• International Journal of Aerospace System Engineering
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• 제4권1호
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• pp.1-8
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• 2017

This paper proposes the load distribution control allocation technique. The proposed method is designed by combining a conventional control allocation method with load distribution ability in order to reduce the stress acting on ailerons. By designing the weighting matrix as a function of the load distribution rule, the optimal deflection angles of each surface to satisfy both control goal and load distribution can be achieved. Moreover, rule based fault-tolerant control technique is also proposed. The rules are generated by considering both dominant control surfaces and the ratio of load distribution among surfaces. The performance of the proposed method is evaluated through numerical simulations.

• 대한인간공학회지
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• 제29권1호
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• pp.61-66
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• 2010

The objective of this paper is to study the usability of the ingress/egress of elderly people, and analyze the physiological workload electromyography (EMG). We investigated the factors of discomfort while the elderly people are using the ingress/egress. Experiments were performed using a seating buck with 22 elderly participants (over 65 years old). The results showed that different muscles are activated during ingress and egress. A system called "easy access" was found which helps to access easily when a driver gets into a car. The current easy access was compared a newly proposed one. It was found that elderly people use less muscle during in/egress in the new easy access system.

• 드라이브 ㆍ 컨트롤
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• 제21권3호
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• pp.20-27
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• 2024

This study aimed to evaluate the impact of mechanizing onion harvesting on labor reduction and work efficiency in Shinan Area. The mechanized harvesting system comprised a stem cutter, digging harvester, and collector. The field tests showed that the average residual stem length after using the stem cutter was 13.22±5.01 cm, with a stem cutting ratio of 91.3% and a damage ratio of 0%. The digging harvester achieved a digging ratio of 100% and a damage ratio of 1.2%, while the collector's damage ratio was 4.1%, loss ratio was 2.7%, and debris mixing ratio was 3.2%. The total working capacity of the mechanized system was 2.3 h/10a, significantly reducing 97.2% of labor time compared to manpower. These results indicate that the mechanization of onion harvesting can effectively reduce labor costs and increase work efficiency. Future research should include performance verification in various environments and an economic analysis of the mechanized system.

• 한국레이저가공학회지
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• 제8권3호
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• pp.27-30
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• 2005

Nowadays, most automotives companies are making use of laser welding in car body assembly shop. But even though laser welding is better than resistance spot welding in many points, its application has been limited to special technology for manufacturing. The paper introduces in the field of remote welding system (RWS) to improve the process efficiency of laser welding. Positioning time of RWS between welding stitches is dramatically reduced to zero. It is a kind of solutions to generalize laser welding in mass production. This RWS consists of fiber laser, industrial robot and 3-axis scanner.