Sang-Deok Lee

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Experts expect that even though peaceful use of nuclear power including nuclear power plant is less likely to contribute to average annual radiation exposure level, once accidents occur, it will spell a disaster. This paper is to manufacture a bismuth eco-friendly radiation shield which does not contain lead for providing medical support when national(More)
In this paper, a fuzzy compensation (FC) technique along with the on-line system identification of two actuator systems of a one-wheel robot. Recursive least square (RLS) algorithm is used to identify the system with FIR-typed moving average filters for both a gimbal and a body system. To compensate for uncertainties in the modeling process, a fuzzy(More)
The lateral-balancing problem of a single-wheel based robot system has been presented. The basic configuration of the system uses the gyroscopic effect which generates the yawing force as a control input. The friction combined with yawing force enables a robot system to maintain the lateral balance. Although this horizontal configuration gives a better(More)
Decreasing stability of power system by voltage instability makes that all power system face with serious problems of stability. That is attributable to the difficulty of controlling the power system. So it is necessary to keep the voltage of load bus in range of the limited level to supply high quality of electric power. Therefore we describe and suggest(More)
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