Direct adaptive control of nonminimum phase systems using integral action

Author

Kim, Jong-Hwan ; Hong, Yeon-Chan ; Lee, Sung-Jun ; Choi, Keh-Kun

Author_Institution

Dept. of Electron. Eng., Seoul Nat. Univ., South Korea

Volume

36

Issue

3

fYear

1989

fDate

8/1/1989 12:00:00 AM

Firstpage

361

Lastpage

364

Abstract

A direct adaptive control scheme is proposed for nonminimum-phase systems in which controller parameters are estimated from the recursive least-squares algorithm and additional auxiliary parameters are obtained from the proposed polynomial identity. A local convergence is guaranteed without any extra condition. Integral action is incorporated into the adaptive controller to eliminate the steady-state error and to satisfy a condition of the unique solution for the polynomial identity. The control law used in this scheme is based on the set-point-on-I-only proportional-integral-derivative (PID) structure

Keywords

adaptive control; parameter estimation; polynomials; three-term control; controller parameters; direct adaptive control scheme; integral action; nonminimum phase systems; polynomial identity; proportional-integral-derivative; recursive least-squares algorithm; Adaptive control; Control systems; Error correction; Parameter estimation; Pi control; Polynomials; Programmable control; Proportional control; Recursive estimation; Steady-state;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/41.31498

Filename

31498