화학공학소재연구정보센터
Canadian Journal of Chemical Engineering, Vol.75, No.4, 765-776, 1997
System-Identification and PID Controller Tuning Using Band-Pass Filters
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.