Nonlinear deterministic observer for state estimation: Application to a continuous free radical polymerization reactor

Dootingh, M. van; Viel, F.; Rakotopara, D.; Gauthier, Jean-Paul; Hobbes, Philippe

doi:10.1016/0098-1354(92)80060-m

Cited by 50 publications

(16 citation statements)

References 18 publications

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“…but applies to an extremely restrictive class of plants; 3 the Ž . Ž high-gain HG approach Tsinias, 1989;Gauthier et al, 1992; . Deza et al, 1992aDeza et al, , 1993Ciccarella et al, 1993 , which guarantees convergence, but has a complex tuning procedure; and Ž .…”

Section: Introductionmentioning

confidence: 99%

Robust dynamic state estimation of nonlinear plants

Álvarez

López

1999

AIChE Journal

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Section: Introductionmentioning

confidence: 99%

Robust dynamic state estimation of nonlinear plants

Álvarez

López

1999

AIChE Journal

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“…These works include an important number of papers dedicated to the design and application of state observers for chemical reactors (e.g. Dimitratos, Georgakis, El-Aasser and Klein 1989;Dochain et al 1992;Van Dootingh, Viel, Rakotopara, Gauthier and Hobbes 1992;GibonFargeot, Hammouri and Celle 1994;Alvarez-Ramirez 1995;Gibon-Fargeot, Celle-Couenne and Hammouri 2000). State observers are important tools for process monitoring due to their ability to provide information ('software measurements') of key process variables, typically related to the process quality variables, like reactant and/or product concentrations, that are not easily accessible for on-line measurement, for reasons that involve in particular the potentially high cost of the measuring devices, the time delay for providing the measurement, or the difficulty to implement them at the appropriate location in a possibly 'aggressive' industrial environment.…”

Section: Introductionmentioning

confidence: 99%

Enthalpy based modelling and design of asymptotic observers for chemical reactors

Dochain

Couenne

Jallut

2009

International Journal of Control

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This article proposes to consider the basic thermodynamics based formulation of the energy balance equation for chemical systems with a limited number of simplifying assumptions. The objective is to show, via the design of one typical mass and energy balance state observer, how such design can be modified by considering the proposed thermodynamically based model formulation. The objective is also to emphasise the difference and the links between the energy balance-based temperature equation largely used in process control. The design of the asymptotic observer is illustrated with two examples: one CSTR in liquid phase and another one in gaseous phase.

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“…There are many state estimation techniques available in literature 29–31. Each technique has its peculiarities and is suitable for a specific process.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and control of styrene solution polymerization using NIR spectroscopy

Fontoura

Santos

Silva

et al. 2003

J of Applied Polymer Sci

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Tailored polymer resins are frequently required for a given application. The lack of instruments for in-line monitoring of polymer quality has long been recognized as an important problem in polymerization reactor control. Using the styrene solution polymerization system as an example, we present the use of near-infrared (NIR) spectroscopy as an alternative tool for in-line and in situ monitoring and control of monomer conversion and average molecular weight of polymer resins. By using a Kalman filter state estimator and an accurate first-principle model, the control loop could be successfully closed to track desired monomer values and average molecular weights. Two process control strategies, one based on the optimal control theory and the other on model predictive control, were implemented both theoretically and experimentally. The experimental results showed that it is feasible to use NIR spectroscopy for the simultaneous control of monomer conversion and polymer average molecular weight.

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Nonlinear deterministic observer for state estimation: Application to a continuous free radical polymerization reactor

Cited by 50 publications

References 18 publications

Robust dynamic state estimation of nonlinear plants

Robust dynamic state estimation of nonlinear plants

Enthalpy based modelling and design of asymptotic observers for chemical reactors

Monitoring and control of styrene solution polymerization using NIR spectroscopy

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