• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.540-544
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• 2001

This paper addresses a hybrid control architecture for the hospital service robot, SmartHelper. In hybrid architecture, the deliberation takes place at planning layer while the reaction is dealt through the parallel execution of operations. Hence, the system presents both a hierarchical and an heterarchical decomposition, being able to show a predictable response while keeping rapid reactivity to the dynamic environment. The deliberative controller accomplishes four functions which are path generation, selection of navigation way, command and monitoring. The reactive controller uses fuzzy and potential field method for robot navigation. Through simulation under a virtual environment IGRIP, the effectiveness of the hybrid architecture is verified.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2457-2460
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• 2004

As the usage of electron electricity is rapidly increasing, corresponding accidents also take place proportionately. Although various losses occur very often because of senility of system and maintenance, only a earth leakage current breaker by a leakage current alert is used. That means it is always fraught with dander. This paper, we propose to measure and cut a leakage current and method of taking a measurement current short circuit. Besides, through keeping watch communication with server, prevent electric loss and mishap in advance.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1603-1608
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• 2006

Nuclear power plant have focused constituent that is always safety. However, period set to observe element that is economic performance keeping inner place now. Hereupon, in this study, chose fuel replace that is on one main activity doing at nuclear power plant for the target. And chose computerization and data management for fuel replace process to the direction.

• Journal of the Korean Society for Precision Engineering
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• v.15 no.3
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• pp.157-167
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• 1998

In this paper it is purpose that reduces joint torques and their rate of change through optimizing trajectory planning of biped walking machine. The motion of biped walking machine is divided into leg motion for walking and body motion for keeping balance. The leg motion is planned by three phases, that are deploy, swing, and place phases, in terms of the state of foot against floor. The distribution of time assigned to each phase is optimized and that causes leg joint torques and their rate of change to minimize. The body notion is produced by using optimal control theory which minimizes body joint torques and satisfies Z.M.P. constraints defined as region of each phase.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.15 no.2
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• pp.73-98
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• 2004

For the successful hotel restaurant, careful research on the customers needs, their changes and the understanding should be on the first step. The aim of this study is to find out hotel restaurant user's satisfaction factors and provide useful information for the decision of its marketing policy. Questionnaire survey, after the preliminary survey, had been performed from 23 Sep 2002 to 02 Oct 2002, for 10 days. 240 questionnaires had been collected and 25 excepted which filled out not properly. 215(86%) questionnaires are included for the analysis. For the enhancement of hotel restaurant customers' satisfaction degree, following suggestions are recommended. The development of distinct hotel service is needed. Also the effort for making hotel buffet restaurant not only for dining place but also customers oriented facilities, with various events and shows, is required. Periodical checking on the food quality, presenting new menu to the customers and keeping consistent food taste and quality areneeded. The studies on the diverse ways for specified and new customers, such as advertisement, promotion, easy access to the hotel restaurant, discount coupon and customer smilage service are needed.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2004.11a
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• pp.133-139
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• 2004

The purpose of this study was to analyze the characteristics of 'Nomadic thought' in interior space through the understanding and interpretation of the contemporary nomadic life. The citizens in modern times lead a nomadic life on the move rather than settle down in place, and this pattern of life is going with increasing speed keeping in step with the development of the Internet. From this point of view, this theoretical investigation on the relationship between the interior architectural analysis and their applications through nomadic thought as a new paradigm is to establish the basis of interior design in the capacity of the main value system in our new generation and to explore the new notion of interior space

• Proceedings of the KSME Conference
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• 2001.06b
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• pp.325-329
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• 2001

This paper addresses a control architecture for the hospital service robot, SmartHelper. With a sensing-reasoning-acting paradigm, the deliberation takes place at planning layer while the reaction is dealt through the parallel execution of operations. Hence, the system presents both a hierarchical and an heterarchical decomposition, being able to show a predictable response while keeping rapid reactivity to the dynamic environment. The deliberative controller accomplishes four functions which are path generation, selection of navigation way, command and monitoring. The reactive controller uses fuzzy and potential field method for robot navigation. Through simulation under a virtual environment IGRIP, the effectiveness of the control architecture is verified.

• Korean Institute of Interior Design Journal
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• no.9
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• pp.10-17
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• 1996

With the ever-increasing important of high-speed information in society as we move towards the 21 st century. Interior design and it's working condition has been changed a great deal included a sort of each special character and make a difference against the others. It used to be find a great poles asunder of worker's safety and project quality according to the environmental dimension of interior construction field as if they should be a pleasantness or poor condition. This research aimed to improvement of environmental construction field of interior with construction engineers and particular interior labors in 4 phases as : ⅠThe preparatory phase : -Secure a Budget, Environmental safety supervisor -Fix of Design quality, Construction period. -Choice of Construction method, Sub constructing Ⅱ. Starting work phase ; -Capacity , Safety of temporary power line. -Carriage, Stock of Material -Safety of Electronic tools, -Personal protector. Ⅲ. Working period ; -Ventilation, I illumination of working place. -Measurement of environmental working condition Ⅳ.Finish working phase ; -Analysis of measurement data. -Evaluation and making up for the weak point. -Keeping data.

• Proceedings of the KIPE Conference
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• 2015.11a
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• pp.123-124
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• 2015

Recently interest on DC systems has been grown up extensively for more efficient connection with renewable energy. During the operation, there happens DC_link voltage variations. This paper focuses on the DC voltage stabilization applied in stand-alone DC microgrid to improve the system stability by keeping the voltage within limits. Batteries and a variable speed diesel generator cover the shortage of power after all available renewable energy is consumed. Load shedding or power generation reduction should automatically takes place if the maximum tolerable voltage variation is exceeded. PSIM based simulation results are presented to evaluate the performance of the proposed control measures.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.23.1-23
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• 2001

The unmanned vehicle is composed of three parts the front & side sensor system for keeping the lane and avoiding obstacles, the acceleration & brake control system for longitudinal motion control, and the steering control system for the lateral motion control. Each system helps the unmanned vehicle of which should take notice of its location and recognize obstacles around the place by itself and make a decision how much fast to proceed according to circumstances. During the operation, the control strategy that the vehicle can detect obstacles and avoid collision on the road involves with vehicle velocity very much. Therefore, We have to define a traction system which is powered by DC motor so that, unmanned vehicle can control its velocity accurately. In this study, we find mechanical and ...