Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2015.10.1.395
Title & Authors
A Note on Relay Feedback Identification Under Static Load Disturbances Kaya, Ibrahim;
Obtaining the parameters for PID controllers based on limit cycle information for the process in a relay controlled feedback loop has become an accepted practical procedure. If the form of the plant transfer function is known, exact expressions for the limit cycle frequency and amplitude can be derived so that their measurements, assumed error free, can be used to calculate the true parameter value. In the literature, parameter estimation for an assumed form of the plant transfer function has generally been considered for disturbance free cases, except a recently published work of the author. In this paper additional simulation results are reported on exact parameter estimation from relay autotuning under static load disturbances.
Process control;Mathematical modelling;Parameter identification;Simulation;Limit cycle;Disturbance;
Ibrahim Kaya, Relay Feedback Identification and Model Based Controller Design: University of Sussex, Brighton, 1999.
Derek P. Atherton, “Conditions for periodicity in control systems containing several relays”, in Proc. 3rd IFAC Congress, Paper 28E, 1996.
Ibrahim Kaya and Derek P. Atherton, “Exact Parameter Estimation from Relay Autotuning under Static Load Disturbances”, in Proc. of American Control Conference, ACC’01, pp. 3274-3279, 2001.
S. H. Shen, J. S. Wu and C. C. Yu, “Autotune identification under load disturbance”, Industrial & Engineering Chemistry Research, vol. 35, pp. 1642-1651, 1996.