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Time Domain Tuning of Fractional Order Controllers Combined With a Smith Predictor for Automation of Water Distribution in Irrigation Main Channel Pools
Author(s) -
CastilloGarcia F.J.,
FeliuBatlle V.,
RivasPerez R.
Publication year - 2013
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.558
Subject(s) - control theory (sociology) , smith predictor , automation , controller (irrigation) , time domain , control engineering , domain (mathematical analysis) , pid controller , channel (broadcasting) , engineering , order (exchange) , computer science , mathematics , control (management) , temperature control , telecommunications , mechanical engineering , mathematical analysis , agronomy , artificial intelligence , computer vision , biology , finance , economics
This paper proposes a new technique for designing fractional order controllers applied to the automation of main canal pools of a water irrigation system. As large variation of all the plant parameters is present in such systems, a fractional order family of controllers combined with a S mith P redictor is designed using time domain specifications. The designed controllers are compared with the standard combination of a S mith P redictor with a proportional‐integral ( PI ) controller. All these controllers are tuned to fulfil the same time specifications in the case of canal nominal dynamics. In some canals the plant parameters may experience large changes that deteriorate the time response, and can even unstabilize the closed‐loop system. The fractional controllers are therefore designed to minimize the loss of performance of the system to variations in these parameters. Simulated results show the performance improvements achieved with these controllers compared with a conventional PI controller.