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CUSUM 을 이용한 공정 데이터의 정성적 해석에 관한 연구
모경주(Kyung Joo Mo),오영석(Young Seok Oh),최용진(Yong Jin Choe),윤인섭(En Sup Yoon) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.5
This paper presents qualitative interpretation method, which is used for extracting qualitative information from numeric sensor data. In the first stage, we determine whether any change has occurred in the process data using CUSUM test. From the sign of the first and second derivatives of the process values, we can classify sensor patterns into 7 basic primitives. In the second stage, we can extract the trends of the process data using modified scale space filtering method. For the real time application, we reduce the calculation cost of scale space filtering by recursive form and solve the end point problem. The proposed method is tested for artificial pattern and the simulated data of evaporator process and it shows good result.