서지주요정보
자기 동조 PID 제어기를 이용한 유가식 생물 반응기에서의 용존산소 농도 제어 = Control of dissolved oxygen concentration using auto-tuning PID controller in fed-batch fermentation
서명 / 저자 자기 동조 PID 제어기를 이용한 유가식 생물 반응기에서의 용존산소 농도 제어 = Control of dissolved oxygen concentration using auto-tuning PID controller in fed-batch fermentation / 김창겸.
저자명 김창겸 ; Kim, Chang-Gyeom
발행사항 [대전 : 한국과학기술원, 1992].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8003006

소장위치/청구기호

학술문화관(문화관) 보존서고

MCE 92012

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A novel control method with an automatic tuning of PID controller parameters has been developed for a better regulation of dissolved oxygen concentration in fed-batch fermentations of E. coli. Agitation speed and the oxygen partial pressure in the inlet gas stream were manipulated. In this method, heuristic reasoning allows improved tuning decisions to be made based upon the supervision of certain control performance indices in the same cognitive manner as in expert control, which obviates the need for assumptions about the process or disturbance patterns. The disturbing effect of feed rate changes is compensated for by using a feedforward scheme. When the oxygen demand of the cells is low, the dissolved oxygen concentration is controlled by manipulating agitation speed. Once the agitation speed reaches its maximum value as the cell concentration increases, the control variable is switched to the oxygen partial pressure in the inlet gas stream. The control input consists of feedback and feedforward parts. The feedback part is determined by using the PID control method and the feedforward part is determined in proportion to the change in the feed rate. The proportional gain is updated on-line by using a set of heuristic rules based on supervision of three performance indices. These indices are the output error covariance, the average value of output error, and the input covariance, which are calculated on-line using a moving window. The integral and derivative time constants are determined from the period of output response, which resembles the procedure of Ziegler-Nichols' method. The specific growth rate is maintained at a low level to avoid acetic acid accumulation and thus to achive a high cell density. The specific growth rate is estimated from the carbon dioxide evolution rate. In fed-batch fermentations the performance was satisfactory for the entire period of the culture in spite of the changes in the feed rate and the switching of the control input.

서지기타정보

서지기타정보
청구기호 {MCE 92012
형태사항 x, 81 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Chang-Gyeom Kim
지도교수의 한글표기 : 장용근
지도교수의 영문표기 : Yong-Keun Chang
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 78-81
주제 Programmable controllers.
용존 산소. --과학기술용어시소러스
제어 장치. --과학기술용어시소러스
Water --Dissolved oxygen.
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