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고정화 효소반응기에서의 민감도 분석 및 연속 변수 측정
Sensitivity Analysis and Sequential Parameter Estimation in Immobilized Enzyme Reactor System
HWAHAK KONGHAK, August 1989, 27(4), 366-373(8), NONE
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Abstract
생촉매 반응기를 on-line으로 최적화하여 제어하기 위해서는 반응 속도상수를 정확히 추정하여야 한다. 고정화 효소에 의하여 포도당이 과당으로 전환되는 반응을 예로들어 생성물의 농도를 측정하여 반응속도식에서 민감도가 제일 큰 비활성화 속도상수를 추정하였다. 온도가 일정하게 유지되는 운전조건 및 시간에 따라 온도가 변하는 최적제어 조건하에서 시간에 따른 민감도가 변수 추정에 미치는 영향을 분석하였다. 민감도를 Kalman filtering에 고려함으로서 민감도가 낮은 운전초기에 추정값이 진동이 감소하며 민감도가 증감함에 따라 참값에 잘 수렴함을 알 수 있었다.
Accurate estimation of the kinetic parameters is essential for on-line optimization and control in bio-catalytic reactor system. Fructose production from glucose using immobilized enzyme was chosen as a model system and deactivation constant which is the most sensitive among the kinetic parameters was estimated from the measure-ments of product concentration. The effects of sensitivity on the sequential parameter estimation were analyzed under the operating conditions of both constant temperature and varying temperature. By considering the parameter sensi-tivity on Kalman filtering, estimated values showed reduced fluctuations in the initial period of operations where the sensitivity was low and better convergence to the true value as the sensitivity increased.