Simple Adaptive Decentralized Controllers

Abstract A new adaptive decentralized control principle is presented. The control laws are restricted to be strictly decentralized, that is, each controller operates with its local information (subsystem output and set point). The adaptation is oblained by modifying The standard pole placement design to compensate the deslabilizing effect of disturbances and unknown interconnections . The proposed scheme is characterized by the computational simplicity and can be applied lo quickly changing systems . The robustness, stability and qualily obtained by the proposed scheme are analysed in the case when the knowledge of subsystem dynamics is inaccurale and disturbances and/or interconnections are present. Results obtained with discrete-time decentralized adaptive control of power syslem excilation are given.

[1]  J. Marsik.  A new conception of digital adaptive PSD control , 1983 .

[2]  Petros A. Ioannou,et al.  Discrete-time decentralized adaptive control , 1988, Autom..

[3]  G. S. Hope,et al.  Microprocessor-based universal adaptive controllers , 1986, Canadian Electrical Engineering Journal.

[4]  R. Ortega,et al.  On the destabilizing effect of cross-coupling in decentralized adaptive control , 1985 .

[5]  Donald Gavel,et al.  Adaptive control of decentralized systems: Known subsystems, unknown interconnections , 1985, 1985 24th IEEE Conference on Decision and Control.

[6]  Donald T. Gavel,et al.  High Gain Adaptive Decentralized Control , 1985, 1985 American Control Conference.

[7]  Petros A. Ioannou.  Decentralized adaptive control of interconnected systems , 1986 .

[8]  Petros A. Ioannou,et al.  Theory and design of robust direct and indirect adaptive-control schemes , 1988 .

[9]  D. Mayne,et al.  Design issues in adaptive control , 1988 .

[10]  Graham C. Goodwin,et al.  Stability analysis of decentralised robust adaptive control , 1988 .

[11]  L. Praly,et al.  Decentralized indirect adaptive control , 1986 .

[12]  H. Raynaud,et al.  A robust solution to the admissibility problem in indirect adaptive control without persistency of excitation , 1988 .

[13]  Michael Athans,et al.  Robustness of continuous-time adaptive control algorithms in the presence of unmodeled dynamics , 1985 .

[14]  Miroslav Kárný,et al.  Tracking of Slowly Varying Parameters by Directional Forgetting , 1984 .