Self-tuning PI-PID regulators for stable systems with varying delay

Abstract A new self-tuning PI-PID regulator is presented, based on a fixed-structure simplified model of the process. To cope with the majority of real-size applications, the simplified model is assumed to incorporate a variable or unknown time delay. Therefore, the core of the PI-PID regulator is an effective identification algorithm suitable for the on-line estimation of the unknown time delay in sampled systems. In the development, particular emphasis is given to all those aspects which make an algorithm really applicable in an industrial environment, such as start-up and initial tuning phase, choice of the sampling period, ease of the control synthesis criterion. Simulation experiments demonstrate the potential of the new regulator.

[1]  David E. Clough,et al.  A Novel Dead-Time Adaptive Controller , 1985 .

[2]  Dale E. Seborg,et al.  A SELF-TUNING CONTROLLER WITH A PID STRUCTURE , 1984 .

[3]  Graham C. Goodwin,et al.  Adaptive filtering prediction and control , 1984 .

[4]  Marimuthu Palaniswami,et al.  An adaptive control algorithm for linear systems having unknown time delay , 1988, Autom..

[5]  Cs. Bányász,et al.  An Adaptive PID Regulator Dedicated for Microprocessor Based Compact Controllers , 1985 .

[6]  Karl Johan Åström,et al.  Adaptive Control , 1989, Embedded Digital Control with Microcontrollers.

[7]  Alberto Leva,et al.  PID autotuning algorithm based on relay feedback , 1993 .

[8]  Yoshikazu Nishikawa,et al.  A method for auto-tuning of PID control parameters , 1981, Autom..

[9]  Tore Hägglund,et al.  Automatic tuning of simple regulators with specifications on phase and amplitude margins , 1984, Autom..

[10]  Tore Hägglund,et al.  Industrial adaptive controllers based on frequency response techniques , 1991, Autom..

[11]  Max Donath,et al.  American Control Conference , 1993 .

[12]  Edgar H. Bristol,et al.  Pattern recognition: An alternative to parameter identification in adaptive control , 1977, Autom..

[13]  Heinz Unbehauen,et al.  Adaptive Control of a Variable Dead Time Process with an Integrator , 1985 .

[14]  D.A. Mellichamp,et al.  A Self-Tuning Controller for Systems with Unknown or Varying Time Delays , 1984, 1984 American Control Conference.

[15]  H. Kurz,et al.  Digital parameter-adaptive control of processes with unknown dead time , 1981, Autom..

[16]  Dale E. Seborg,et al.  A Self-Tuning Controller for Systems with Unknown or Varying Time Delays , 1984 .

[17]  Chang-Chieh Hang,et al.  A Dual-Rate Adaptive Digital Smith Predictor , 1987 .

[18]  D. W. Clarke,et al.  Offset problem and k-incremental predictors in self-tuning control , 1983 .

[19]  P. Gawthrop.  Self-tuning PID controllers: Algorithms and implementation , 1986 .

[20]  Riccardo Scattolini,et al.  Recursive estimation of time delay in sampled systems , 1991, Autom..

[21]  Claudio Maffezzoni,et al.  A CAD Environment for the Design of Power Plant Control Systems , 1992 .