An improved closed-loop stability related measure for finite-precision digital controller realizations


Wu, J., Chen, S., Li, G., Istepanian, R. H. and Chu, J. (2001) An improved closed-loop stability related measure for finite-precision digital controller realizations. IEEE Transactions on Automatic Control, 46, (7), 1162-1166.

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Description/Abstract

The pole-sensitivity approach is employed to investigate the stability issue of the discrete-time control system, where a digital controller, implemented with finite word length (FWL), is used. A new stability related measure is derived, which is more accurate in estimating the closed-loop stability robustness of an FWL implemented controller than some existing measures for the pole-sensitivity analysis. This improved stability measure thus provides a better criterion to find the optimal realizations for a generic controller structure that includes output-feedback and observer-based controllers. A numerical example is used to verify the theoretical analysis and to illustrate the design procedure.

Item Type: Article
Additional Information: submitted in May 2000, revised in Sept. 2000 and Jan. 2001, accepted in Feb. 2001
Divisions: Faculty of Physical and Applied Science > Electronics and Computer Science > Comms, Signal Processing & Control
Item ID: 253306
Date Deposited: 06 Sep 2001
Last Modified: 02 Mar 2012 13:19
Contributors: Wu, J. (Author)
Chen, S. (Author)
Li, G. (Author)
Istepanian, R. H. (Author)
Chu, J. (Author)
Date: July 2001
Additional Information: submitted in May 2000, revised in Sept. 2000 and Jan. 2001, accepted in Feb. 2001
Status: Published
Further Information:Google Scholar
ISI Citation Count:33
URI: http://eprints.soton.ac.uk/id/eprint/253306

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