K. Nakashima

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Describes a parallel link manipulator built for application to an underground excavation task. The specifications of both the manipulator and the controller are explained. The kinematics of the manipulator are analyzed to develop a control algorithm. The workspace of the manipulator is analyzed by simulation. The singularity problem for parallel(More)
The authors developed an automatically controlled manipulation system for subsea operation. The manipulation system was developed to provide inspection, cleaning and maintenance, that have been accomplished by divers, at an ocean oil exploitation platform in maximum 200 m depth under the water. The manipulator is designed to have one extension arm and two(More)
We give our formulation for a ten class classification of handwritten Hindi digit recognition. Automatic Recognition of Handwritten Devnagri Numerals is a difficult task, because of the variability in writing style; pen used for writing and the color of handwriting, unlikely the printed character. Furthermore, Hindi Digit can be drawn in different sizes.(More)
We have developed an automatic bolt supply and tightening robot for an automatic segment assembly system that can support work in small-diameter tunnels. The segments are hex-head types, and the prototype handles segments with an inside diameter of 4.8 meters. The automatic bolt supply and tightening robot is separate from the erector used for positioning(More)
DESIGN STUDY OF FUSION EXPERIMENTAL REACTOR. An overall review of the conceptual design studies of a next generation tokamak fusion experimental reactor (FER) at JAERI is presented. Major objectives of the FER are to demonstrate long, ignited D-T burning and the feasibility of hey fusion reactor technologies. Two typical design concepts have been studied in(More)
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