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Control of pH processes using fuzzy modeling of titration curve

机译:使用滴定曲线的模糊建模控制pH过程

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摘要

Model-based pH control is a difficult problem due to its inherent nonlinearity and time-varying characteristics. This is specially the case when the pH regulation of streams consisting hundreds of constituents with varying concentrations is desired. The pH process can be modeled by using conservation laws and neutrality condition. An alternative to this mechanistic modeling is using nonlinear empirical modeling such as fuzzy modeling. This paper proposes a new approach of fuzzy modeling of titration curves, which can be used for control purposes. The Takagi-Sugeno model was used for the modeling of titration curve. Two control algorithms, which are designed based on the titration curve, namely, Strong Acid Equivalent (SAE) and Multiple Model, Switching and Tuning (MMST) have been used. The efficacy of the proposed approach is demonstrated via simulation and experimental study of a pH control system.
机译:由于其固有的非线性和时变特性,基于模型的pH控制是一个难题。当需要调节包含数百种浓度不同的组分的物流的pH值时,尤其是这种情况。 pH过程可以通过使用守恒定律和中性条件进行建模。机械模型的替代方法是使用非线性经验模型,例如模糊模​​型。本文提出了一种滴定曲线模糊建模的新方法,该方法可用于控制目的。 Takagi-Sugeno模型用于滴定曲线的建模。根据滴定曲线设计了两种控制算法,即强酸当量(SAE)和多模型,转换和调谐(MMST)。通过pH控制系统的仿真和实验研究证明了该方法的有效性。

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