Autotuning of a new PI-PD Smith predictor based on time domain specifications
Küçük Resim Yok
Tarih
2003
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The paper extends a recent work on a modified PI-PD Smith predictor, which leads to significant improvements in the control of processes with large time constants or an integrator or unstable plant transfer functions plus long dead time for reference inputs and disturbance rejections. Processes with high orders or long time delays are modeled with low er order plant transfer functions with longer time delays. The PI-PD controller is designed so that the delay-free part of the system output will follow the response of a first-order plant or second-order plant, where it is appropriate, assuming a perfect matching between, the actual plant and model in both the dynamics and time delay. The provided simple tuning formulas have, physically meaningful parameters. Plant model transfer functions and controller settings are identified based on exact analysis from a single relay feedback test using the peak amplitude and frequency of the process output. Examples are given to illustrate the simplicity and superiority of the proposed method compared with some existing ones. (C) 2003 ISA-The Instrumentation, Systems, and Automation Society.
Açıklama
Anahtar Kelimeler
Smith predictor, PID controllers, identification, disturbance rejection
Kaynak
Isa Transactions
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
42
Sayı
4
