A feedforward plus decoupling control design for set-point following of TITO processes

In this paper we propose a methodology for the design of a control system for two-inputs-two-outputs processes. The methodology aims at improving the set-point following performance by employing a decoupler and a feedforward controller. The feedback controller is a standard decentralized PID controller while the feedforward controller is based on an approximated model of the decoupled system. A robustness analysis is performed in this context. Simulation and experimental results show the effectiveness of the methodology.

[1]  André Desbiens,et al.  Simplified, ideal or inverted decoupling? , 1998 .

[2]  A. Piazzi,et al.  PARETO OPTIMAL FEEDFORWARD CONSTRAINED REGULATION OF MIMO LINEAR SYSTEMS , 2005 .

[3]  Carlos E. García,et al.  Fundamental Process Control , 1988 .

[4]  Antonio Visioli A new design for a PID plus feedforward controller , 2004 .

[5]  Aurelio Piazzi,et al.  Improving Set-Point-Following Performance of Industrial Controllers with a Fast Dynamic Inversion Algorithm , 2003 .

[6]  William L. Luyben,et al.  Simple method for tuning SISO controllers in multivariable systems , 1986 .

[7]  M. Araki,et al.  Two-Degree-of-Freedom PID Controllers , 2003 .

[8]  Harold L. Wade,et al.  Inverted decoupling : a neglected technique , 1997 .

[9]  Chang-Chieh Hang,et al.  Improvement of transient response by means of variable set point weighting , 1996, IEEE Trans. Ind. Electron..

[10]  Sigurd Skogestad,et al.  Feedforward control under the presence of uncertainty , 2003 .

[11]  Aurelio Piazzi,et al.  A noncausal approach for PID Control , 2006 .

[12]  Tore Hägglund,et al.  Advanced PID Control , 2005 .

[13]  Saeed Tavakoli,et al.  Tuning of decentralised PI (PID) controllers for TITO processes , 2006 .

[14]  Antonio Visioli,et al.  An optimal feedforward control design for the set-point following of MIMO processes☆ , 2009 .

[15]  Karl Johan Åström,et al.  PULSE-STEP CONTROL , 2002 .

[16]  Anders Wallén,et al.  Tools for Autonomous Process Control , 2000 .

[17]  Tore Hägglund,et al.  Decoupler and PID controller design of TITO systems , 2006 .

[18]  Antonio Visioli,et al.  Minimum-time feedforward technique for PID control , 2009 .

[19]  Antonio Visioli,et al.  Practical PID Control , 2006 .

[20]  Antonio Visioli,et al.  Fuzzy logic based set-point weight tuning of PID controllers , 1999, IEEE Trans. Syst. Man Cybern. Part A.

[21]  Wang,et al.  Auto-tuning of TITO decoupling controllers from step tests , 2000, ISA transactions.

[22]  F. G. Shinskey,et al.  Feedback controllers for the process industries , 1994 .