On the selection of tuning methodology of FOPID controllers for the control of higher order processes
Elsevier for ISA
Copyright © 2011 ISA. Published by Elsevier Ltd. All rights reserved.
In this paper, a comparative study is done on the time and frequency domain tuning strategies for fractional order (FO) PID controllers to handle higher order processes. A new fractional order template for reduced parameter modelling of stable minimum/non-minimum phase higher order processes is introduced and its advantage in frequency domain tuning of FOPID controllers is also presented. The time domain optimal tuning of FOPID controllers have also been carried out to handle these higher order processes by performing optimization with various integral performance indices. The paper highlights on the practical control system implementation issues like flexibility of online autotuning, reduced control signal and actuator size, capability of measurement noise filtration, load disturbance suppression, robustness against parameter uncertainties etc. in light of the above tuning methodologies.
This work has been supported by the Department of Science and Technology (DST), Govt. of India under the PURSE programme.
This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.
Vol. 50 (3), pp. 376 - 388
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