A simple algorithm for the time-optimal control of chemical processes

A simple algorithm for the time‐optimal control of chemical processes during setpoint changes, in processes which can be described by a second‐order lag plus dead time model, is described. Knowledge of the unsteady state model parameters is not required because the algorithm uses a dimensionless pha...

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Bibliographic Details
Published in:AIChE journal 1974-01, Vol.20 (1), p.133-140
Main Authors: Beard Jr, John N., Groves Jr, Frank R., Johnson Jr, Adrain E.
Format: Article
Language:English
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Summary:A simple algorithm for the time‐optimal control of chemical processes during setpoint changes, in processes which can be described by a second‐order lag plus dead time model, is described. Knowledge of the unsteady state model parameters is not required because the algorithm uses a dimensionless phase plane on which the switching curves are independent of system parameters for a given forcing function. The algorithm gives the parameters of a second‐order lag plus dead time model as a by product of the setpoint change. It is easily tuned and is relatively insensitive to changes in the process dynamics. The algorithm does not require a large computer or long computing times and has been implemented on both analog and digital computers in controlling computer simulated systems.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.690200117