• Journal of Electrical Engineering and Technology
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• 제7권1호
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• pp.58-63
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• 2012

The shape optimization of a Thomson coil actuator used in an arc eliminator is done for fast response by adopting topology modification method. The displacement of the plate in a fixed calculation time is taken as the objective function. The objective function and contribution factor are calculated by using an adaptive equivalent circuit method which has been proved accurate and efficient. Both shape optimization and performance analysis are accomplished based on the segmentation of plate. Through the refinement of the sensitive segments a precise optimal plate shape can be obtained. The effectiveness of the proposed method is proved by the comparison of results before and after the shape optimization.

• 한국산업융합학회 논문집
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• 제26권6_3호
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• pp.1315-1323
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• 2023

Rehabilitation assistive devices not only assist the rehabilitation therapy and daily life of the disabled and the elderly, but also assist the labor of their caregivers, so various functions are required to improve their quality of life. In this study, a design method considering its practicality is introduced for an active rehabilitation assistive device that can perform both standing and walking assistance by driving various actuators. For this purpose, the force required to assist standing was calculated using statics with the body segmentation method. Also, the overturning stability of the device was verified for various physical conditions and postures. The actuator in the active rehabilitation assistive device was operated by a patient using a graphical user interface in an embedded computer and a touch panel for easy usage. The detailed design was performed for implementation through the help of 3D-CAD and the finite element analysis, and a prototype was produced. Finally, it was proven that the design goal was satisfied by experimental validation.

• 한국정보처리학회논문지
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• 제5권3호
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• pp.842-850
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• 1998

본 논문에서는 기계 도면의 분할 및 벡터화에 기반하여 해칭 영역을 인식하는 방법을 제안한다. 이러한 해칭영역의 인식은 다음의 세 단계로 구성된다. 먼저, 제안된 방법은 문자가 제거된 기계 도면으로부터 객체, 화살표 및 설명선(치수선, 해칭선등)의 분할 및 분리된 선분의 벡터화가 수행된다. 이러한 도면의 분할 및 벡터화가 수행되면 벡터화된 객체로부터 폐루프를 레이블링하여 행칭 영역의 후보를 결정한다. 마지막으로, 해칭 영역의 후보넹 포함되는 해칭선들을 검출함으로써 해칭 영역의 인식을 마루리한다. 제안된 방법에 의해 해칭 영역의 추출 및 인식이 용이함이 나타난다.