열간압연공정에서 백업롤 편심 신호 검출용 아날로그 필터

This paper presents an analog filter with variable center frequency of extracting eccentricity signal due to backup roll problem in hot rolling process. The proposed analog filter uses only information obtained from sensors which were already installed in every hot rolling process. Such sensors are load cell of extracting rolling pressure and tachometer of measuring backup roll’s rotating speed. According to transfer function of the proposed analog filter, it is clearly proven that the proposed analog filter can extract time-varying eccentricity signal depending upon backup roll’s rotating speed. Furthermore several design equations were suggested to compute proper values of components and offers an easy design procedure.