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Analysis and Implementation of the Double‐Controller Scheme
Author(s) -
Tian Y.C.,
Gao F.
Publication year - 2001
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500090208
Subject(s) - control theory (sociology) , robustness (evolution) , feed forward , computer science , scheme (mathematics) , smith predictor , controller (irrigation) , frequency domain , time domain , control engineering , engineering , control (management) , mathematics , pid controller , temperature control , artificial intelligence , mathematical analysis , agronomy , biochemistry , chemistry , biology , computer vision , gene
This paper gives some insight into the double‐controller scheme proposed recently. The double‐controller scheme has good robustness as well as simultaneous fast set‐point tracking and good load rejection. Investigations show that it enhances the conventional feedforward control. The stability and robustness of the control scheme are analyzed in the frequency domain and compared with those of the Smith predictor. To further improve the performance of the double‐controller scheme, techniques are proposed to accommodate large uncertainties in process delay time and gain. Two control signals of the double‐controller scheme are employed for extraction of process parameter information and on‐line tuning of the control system. The effectiveness of the proposed techniques is verified through numerical simulations.