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鄭準基,徐永達 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1
Cutting conditions including depth of cut, feedrate, cutting speed, tool geometry, and setting angle are parameters that give significant effect to the cutting force in metal cutting operations. And the cutting force can be controlled to maintain constant value by combining and regulating these parameters. Generation of excessive cutting force and cutting heat can be restrained at the constant cutting force and then, we can achieve the progressive cutting stability and performance of machine-tool and tool itself. In this study, fuzzy control is introduced to determine proper feed-override. The application of fuzzy systems can simulate human experience, human intelligence, and experimental information for cutting processes, and can be used to control very complex and uncertain processes(including machining processes) such as multi input-multi output, and non-linearity, etc. Fuzzy algorithm of automatic feed-override regulation is also proposed to control cutting forces in CNC lathe turning. The experimental results reveal that the fuzzy controller is suitable to the regulating feed-override of AC servo-motor of CNC lathe.
이용주,서영달,Lee, Yong-Ju,Seo, Young-Dal 한국자동차공학회 2007 한국 자동차공학회논문집 Vol.15 No.4
The experimental system, developed in this research, is a teaching material that trains and practices automobile electric circuit in technical high school. This system consists of a textbook, 15 kinds of instruments and 62 kinds of 'Flash' animations. Textbook includes automobile electric circuits and experimental process. Instruments have 23 kinds of drills. Its is composed of electrical relays, motors, switches, light bulbs, electrical lines and power unit so on. 'Flash' animation displays an electrical current flow on circuits actually. Both Dacum method and ISD skill have been conducted to analysis job and design syllabus. The experimental system have been implemented on technical high school class to evaluate its objectivity and effect. It is expected that this system can contribute to studying of car service.