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System identification and PID controller tuning using band‐pass filters
Author(s) -
Natarajan K.,
Gilbert A. F.
Publication year - 1997
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450750415
Subject(s) - pid controller , control theory (sociology) , transfer function , frequency response , step response , system identification , process (computing) , controller (irrigation) , computer science , fractionating column , identification (biology) , process control , control engineering , distillation , engineering , control (management) , temperature control , data modeling , chemistry , organic chemistry , electrical engineering , artificial intelligence , database , biology , operating system , agronomy , botany
An online recursive system identification technique using band‐pass filters has been developed to estimate the continuous‐time frequency response of any process control system at a number of discrete frequencies. Tuning of PID controllers employs a gradient optimization technique, based on the estimated discrete frequency response of the process rather than a transfer function model of the process. The performances of the identification technique and controller tuning algorithm are demonstrated by a simulation and by experimental results on a distillation column composition control.