A New Approach for Finite-Precision Controller Realizations

Author

Wu, Jun ; Xu, Weihua ; Chen, Sheng ; Li, Gang

Author_Institution

Ins. Adv. Process Contr., Zhejiang Univ., Hangzhou

Volume

1

fYear

0

fDate

0-0 0

Firstpage

461

Lastpage

465

Abstract

A new approach is proposed to design optimal finite word length (FWL) realizations of digital controllers implemented in fixed-point arithmetic. An analytical method is first formulated to obtain a global optimal controller realization that optimizes an FWL closed-loop stability measure. A dynamic range measure is next derived for the implemented controller realization, and a numerical optimization method is developed to make the controller realization having the smallest dynamic range without sacrificing any FWL closed-loop stability robustness

Keywords

closed loop systems; controllers; digital control; fixed point arithmetic; optimal control; optimisation; roundoff errors; stability; closed-loop stability measure; digital controllers; finite-precision controller realizations; fixed-point arithmetic; global optimal controller realization; optimal finite word length realizations; Control systems; Design optimization; Digital control; Dynamic range; Fixed-point arithmetic; Optimal control; Optimization methods; Robust control; Robust stability; Stability analysis; Finite word length; digital control; optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on

Conference_Location

Dalian

Print_ISBN

1-4244-0332-4

Type

conf

DOI

10.1109/WCICA.2006.1712382

Filename

1712382