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Optimal finite-precision digital controller realizations based on an improved closed-loop stability measure

Optimal finite-precision digital controller realizations based on an improved closed-loop stability measure
Optimal finite-precision digital controller realizations based on an improved closed-loop stability measure
This paper investigates the stability issue of the discrete-time control system, where a digital controller, implemented with finite word length (FWL), is used. A new tractable stability measure is derived, which is much less conservative than some existing measures in estimating the closed-loop stability robustness of an FWL implemented controller. An optimisation procedure is developed based on this improved measure to find the optimal realization for a general controller structure that includes output-feedback and observer-based controllers. Numerical examples are used to verify the theoretical analysis and to illustrate the design procedure.
CD-ROM, 6 pages
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Istepanian, R.H.
f512e6a3-c2ce-4288-8b5f-d32995b8e1c0
Li, G.
f0f77e84-2dca-4e91-854e-156d36434431
Chen, S.
ac405529-3375-471a-8257-bda5c0d10e53
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Istepanian, R.H.
f512e6a3-c2ce-4288-8b5f-d32995b8e1c0
Li, G.
f0f77e84-2dca-4e91-854e-156d36434431

Chen, S., Wu, J., Istepanian, R.H. and Li, G. (2000) Optimal finite-precision digital controller realizations based on an improved closed-loop stability measure. Proceedings of UKACC International Conference on Control 2000 (Cambridge, UK),Sept.4-7, 2000.. CD-ROM, 6 pages .

Record type: Conference or Workshop Item (Other)

Abstract

This paper investigates the stability issue of the discrete-time control system, where a digital controller, implemented with finite word length (FWL), is used. A new tractable stability measure is derived, which is much less conservative than some existing measures in estimating the closed-loop stability robustness of an FWL implemented controller. An optimisation procedure is developed based on this improved measure to find the optimal realization for a general controller structure that includes output-feedback and observer-based controllers. Numerical examples are used to verify the theoretical analysis and to illustrate the design procedure.

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More information

Published date: September 2000
Additional Information: presented at UKACC Control 2000 (Cambridge, UK), Sept.4-7, 2000. Organisation: UKACC
Venue - Dates: Proceedings of UKACC International Conference on Control 2000 (Cambridge, UK),Sept.4-7, 2000., 2000-08-31
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 253037
URI: http://eprints.soton.ac.uk/id/eprint/253037
PURE UUID: fedf5a2c-f361-49e1-8f18-5589b5baaf11

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Date deposited: 11 Sep 2000
Last modified: 29 Jan 2020 15:15

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