Programmable logic controller implementation of an auto-tuned predictive control based on minimal plant information.
This paper makes two key contributions. First, it tackles the issue of the availability of constrained predictive control for low-level control loops. Hence, it describes how the constrained control algorithm is embedded in an industrial programmable logic controller (PLC) using the IEC 61131-3 programming standard. Second, there is a definition and implementation of a novel auto-tuned predictive controller; the key novelty is that the modelling is based on relatively crude but pragmatic plant information. Laboratory experiment tests were carried out in two bench-scale laboratory systems to prove the effectiveness of the combined algorithm and hardware solution. For completeness, the results are compared with a commercial proportional-integral-derivative (PID) controller (also embedded in the PLC) using the most up to date auto-tuning rules.
Department of Automatic Control and Systems Engineering, University of Sheffield, Sheffield, South Yorkshire, S1 3JD, UK. g.valencia-palomo@sheffield.ac.uk
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Rossiter
D000465:Algorithms; D001331:Automation / Q000592:standards; D006358:Hot Temperature; D007221:Industry / Q000295:instrumentation*; D008128:Logic; D015233:Models, Statistical; D012015:Reference Standards; D012984:Software