Journal ArticleDOI
Transfer function identification of a liquid flow-line pressure control system from simple relay auto-tuning
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In this article, an accurate modeling of liquid flow systems is needed for the effective operation of the plant under different conditions. But the model may change with time, and due to this, the operation ma...Abstract:
Accurate modeling of liquid flow systems is necessary for the effective operation of the plant under different conditions. The plant dynamics may change with time, and due to this, the operation ma...read more
References
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Journal ArticleDOI
Optimum Settings for Automatic Controllers
J. G. Ziegler,N. B. Nichols +1 more
TL;DR: In this paper, the three principal control effects found in present controllers are examined and practical names and units of measurement are proposed for each effect and corresponding units for a classification of industrial processes in terms of two principal characteristics affecting their controllability.
Journal ArticleDOI
Paper: Automatic tuning of simple regulators with specifications on phase and amplitude margins
Karl Johan Åström,Tore Hägglund +1 more
TL;DR: A simple method for estimating the critical gain and the critical frequency is described, which may be used for automatic tuning of simple regulators as well as initialization of more complicated adaptive regulators.
Journal ArticleDOI
Relay Feedback Auto-tuning of Process Controllers – A Tutorial Review
TL;DR: The PID relay auto-tuner of Astrom-Hagglund is one of the simplest and most robust autotuning techniques for process controllers and has been successfully applied to industry for more than 15 years.
Journal ArticleDOI
Derivation of transfer functions for highly nonlinear distillation columns
TL;DR: Mise en place d'une procedure de commande simple which utilise la methode "autotune" d'Astrom for obtenir les gains and les frequences critiques for chaque element diagonal de la matrice des fonctions de transfert as discussed by the authors.
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