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Adaptive temperature control of industrial processes: a comparative study

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3 Author(s)
Gawthrop, P.J. ; Dept. of Mech. Eng., Glasgow Univ., UK ; Nomikos, P.E. ; Smith, L.S.P.S.

Three classes of automated tuning for PID controllers are discussed and compared. These are a Ziegler-Nichols-based autotuner, a waveform-analysis adaptive tuner and a least-squares identification-based self-tuner. The results of a program of experiments to evaluate the relative performance of the three approaches are presented, together with a discussion of their relative merits in the light of these experiments. Two representative industrial temperature-controlled processes are used in these experiments: a plastic-on-wire multizone extruder barrel and a laboratory furnace. Between them, these processes display typical characteristics such as nonlinearity and loop coupling.

Published in:

Control Theory and Applications, IEE Proceedings D  (Volume:137 ,  Issue: 3 )