Exact Fuzzy Observer for a Baker's Yeast Fed-Batch Fermentation Process

E. Herrera-López, Bernardino Castillo, Jesús Ramírez, E. Ferreira
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引用次数: 5

Abstract

The purpose of this work is to design an exact fuzzy observer for a bioprocess switching between two different metabolic states. A fed-batch baker's yeast culture is modeled by two sub-models: a respiro-fermentative state with ethanol production and a respirative state with ethanol consumption. An exact fuzzy observer model using sector nonlinearity was built for both nonlinear models; the observer gains were designed using Linear Matrix Inequalities (LMI's). The observer dynamics shows a very good tracking behavior with respect of the states of the switching partial models. The observer premise variables depend on the state variables estimated by the fuzzy observer.
面包酵母补料分批发酵过程的精确模糊观测器
这项工作的目的是为两种不同代谢状态之间的生物过程切换设计一个精确的模糊观察者。采用两个子模型对分批喂料酵母培养物进行了建模:一个子模型是产生乙醇的呼吸发酵状态,另一个子模型是消耗乙醇的呼吸发酵状态。对两种非线性模型分别建立了扇形非线性的精确模糊观测器模型;利用线性矩阵不等式(LMI's)设计观测器增益。观测器动力学对切换部分模型的状态表现出很好的跟踪行为。观测器的前提变量依赖于模糊观测器估计的状态变量。
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