Journal ArticleDOI
Nonlinear control of pH processes using the strong acid equivalent
TLDR
In this paper, a new approach was developed for the design of nonlinear controllers for pH processes, consisting of defining an alternative equivalent control objective which is linear in the states and using a linear control law in terms of this new control objective.Abstract:
Given the general structure of the nonlinear dynamic model, consisting of material balances and chemical equilibria equations, a new approach has been developed for the design of nonlinear controllers for pH processes. It consists of defining an alternative equivalent control objective which is linear in the states and using a linear control law in terms of this new control objective. Computer simulations evaluate the performance of this control methodology in the presence of disturbances and model uncertaintyread more
Citations
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Book
Control of Nonlinear and Hybrid Process Systems: Designs for Uncertainty, Constraints and Time-Delays
TL;DR: In this paper, the authors present analysis and control of nonlinear systems with uncertainty and time delays, as well as fault tolerance and fault-tolerant control of process systems.
Journal ArticleDOI
A new approach to the identification of pH processes based on the Wiener model
TL;DR: In this paper, a frequency sampling filter model is used to represent the dynamic linear element and a simple least-squares algorithm is applied to simultaneously estimate the parameters of the linear subsystem and the inverse static nonlinearity.
Journal ArticleDOI
Wiener model identification and predictive control of a pH neutralisation process
TL;DR: In this article, a nonlinear subspace identification method has been proposed to identify a Wiener model in a format suitable for its use in a standard linear-model-based predictive control scheme.
Journal ArticleDOI
Neural network modelling and control strategies for a pH process
Ai Poh Loh,K.O. Looi,K.F. Fong +2 more
TL;DR: The neural network as a universal approximator is used to good effect in this nonlinear problem, as is shown in the simulation results.
Journal ArticleDOI
Type-2 fuzzy model based controller design for neutralization processes.
TL;DR: In this study, an inverse controller based on a type-2 fuzzy model control design strategy is introduced and this main controller is embedded within an internal model control structure that improves the closed-loop performance to disturbance rejection as shown through the real-time control of the pH neutralization process.