• 동력기계공학회지
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• 제15권5호
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• pp.83-90
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• 2011

In general, 20-high Sendzimir mills(ZRM) use small diameter work rolls to provide massive rolling force. Because of small diameter of work rolls, steel strip has a complex shape mixed with quarter, edge and center waves. Especially when the shape of the strip is controlled automatically, the actuator saturation occurs. These problems affect the productivity and quality of products. In this paper, the problems in automatic shape control of ZRM were analyzed. In order to evaluate the problems for the automatic shape control in ZRM, recognition performance was analyzed by comparing the measured shape and the recognized shape. The actuator positions by the shape recognition and the manual operation were compared. From the analysis results, the necessity of the improvement of recognition performance in ZRM is suggested.

• 제어로봇시스템학회논문지
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• 제15권10호
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• pp.1062-1070
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• 2009

The strip shape for the stainless steel process has made an issue of the strip quality, and hence the shape control method is developed at the Sendzimir rolling mill (ZRM). ZRM is a stainless cold rolling mill and has actuators for the shape control. They are first intermediate rolls and top crown rolls, which are controlled horizontally and vertically, respectively. The shape control of the stainless steel rolling process has difficulty in obtaining the symmetrical shape. The objective of the shape control is to minimize the shape deviation and to maintain stable state, which keeps symmetrical shape pattern in the lateral direction. The method of the shape recognition employs a least squares method and neural network. The shape deviation is the difference between the target shape and actual shape and is controlled by the fuzzy shape control. The fuzzy shape control using operator's informative knowledge is proposed in this paper. The experiments are carried out online for various stainless materials and sizes. The productivity of the rolling process has increased from 9.0 to 9.4 tons per hour.

• 한국식품과학회지
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• 제20권2호
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• pp.164-169
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• 1988

간장덧에 분리 동정한 Zygosaccharomyces rouxii M-12 와 Saccharomyces cerevisiae M-43간의 원형질체 융합에 의한 새로운 간장효모균주를 개량할 목적로 영양요구성 돌연변이주인 Zygosaccharomyces rouxii ZRM-83 ($Met^-,\;Thr^-$)과 Saccharomyces cerevisiae SCM-465($Lys^-,\;Arg^-$)을 얻었다. 양 균주의 원형질체 형성의 조건은 Zymolase 20T을 0.5mg/ml, 60분에서 많이 생성하였고 원형질체 융합조건은 30% PEG6,000을 30분간 처리했을때 융합빈도는 $10^{-4}{\sim}10^{-5}$이였다. 융합체의 세포크기는 진주보다 컸으며 DNA함량도 많았다.