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측정오차와 외란을 고려한 유도전동기의 강인한 속도제어에 관한 연구
蔡英茂,尹炳道,金燦起,鄭憲主 충주대 산업과학기술연구소 1995 産業科學論文集 Vol.3 No.-
It is difficult to control industrial drive systems because of load disturbance, parameter variation and measurement noise. So a theorem is required to have robustness for the measurement noise and disturbance. This paper is among the researches of solving these problems. Sliding mode state observer is robust for measurement noise, modeling-error and load disturbance. The pole of sliding mode state observer can be placed at (0,0) in Z-plane for fast response. This method is, namely, deadbeat control. One side, sliding mode state observer output is discontinuous on a switching hyperplance, that causes harmful effects such as current harmonics and speed oscillation. In this paper, also the reducing method of the chattering of sliding mode state observer output is proposed. In this paper, the method of designing a robust sliding mode state observer taking account of the ability of disturbance and noise attenuation is proposed. Also, the proposed control system is digitally implemented with TMS320C31.
韓國産 빈대에 對한 Dibrom과 Premium Sumithion의 殺蟲 效果와 이들의 毒性에 대하여
金斗熙,蔡英碩,兪炳泰 최신의학사 1969 最新醫學 Vol.12 No.7
I hear already introduced insecticides, 5% oil D. D. T., 10% D. D. T. powder, 1% Lindane powder, 1% . Lindane emulsion etc are not effect for erradication of bedbug in Korean Army Society. We have therefore studied comparatively about Dibrom and Premium Sumithion recently introduced organic phosphoric compounds. The results are as follows: 1) Bedbug-cidal effect of Dibrom is so prompt that KT-50 by usual concentration 0.5% is 61'12", but KT-50 of Premium Sumithion by usual concentration 1% is 98'30". 2) Residual effect of P. Sumithion to the Bedbug is maintained at least 20 days over. But its of 1% Dibrom is less than about 2 weeks. 3) The toxicity of Dibrom is markedly stronger about 2 times than P. Sumithion and about 10 times than 1% Malathicn through orally swallowing, absorbing via skin surface and intraperitoneal test.