Title :
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
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;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1712382
