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Optimal finite-precision controller realization of sampled data systems

Optimal finite-precision controller realization of sampled data systems
Optimal finite-precision controller realization of sampled data systems
We investigate the sensitivity of closed-loop stability with respect to finite word length (FWL) effects in the implementation of the digital controller coefficients. The optimal realization of digital controller structures with finite precision consideration is formulated as the solution of a constrained nonlinear optimization problem. A sophisticated optimization strategy involving the adaptive simulated annealing (ASA) optimizer is developed to provide an efficient computational method for searching the optimal FWL controller realization with maximum stability bound and minimum bit length requirement. A numerical simulation example is presented to illustrate the effectiveness of the proposed strategy.
0020-7721
429-438
Istepanian, R. H.
b71b8b46-cb69-4fcd-8253-d2e7a93079ea
Chen, S.
9310a111-f79a-48b8-98c7-383ca93cbb80
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Whidborne, J. F.
4ab1bd73-64f5-4c7c-97da-31c8758352a0
Istepanian, R. H.
b71b8b46-cb69-4fcd-8253-d2e7a93079ea
Chen, S.
9310a111-f79a-48b8-98c7-383ca93cbb80
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Whidborne, J. F.
4ab1bd73-64f5-4c7c-97da-31c8758352a0

Istepanian, R. H., Chen, S., Wu, J. and Whidborne, J. F. (2000) Optimal finite-precision controller realization of sampled data systems. International Journal of Systems Science, 31 (4), 429-438.

Record type: Article

Abstract

We investigate the sensitivity of closed-loop stability with respect to finite word length (FWL) effects in the implementation of the digital controller coefficients. The optimal realization of digital controller structures with finite precision consideration is formulated as the solution of a constrained nonlinear optimization problem. A sophisticated optimization strategy involving the adaptive simulated annealing (ASA) optimizer is developed to provide an efficient computational method for searching the optimal FWL controller realization with maximum stability bound and minimum bit length requirement. A numerical simulation example is presented to illustrate the effectiveness of the proposed strategy.

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Published date: April 2000
Additional Information: Address: London
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 251060
URI: http://eprints.soton.ac.uk/id/eprint/251060
ISSN: 0020-7721
PURE UUID: 256a33cb-f87c-43cc-9d7a-a16253af7029

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Date deposited: 29 Mar 2000
Last modified: 14 Mar 2024 05:07

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Contributors

Author: R. H. Istepanian
Author: S. Chen
Author: J. Wu
Author: J. F. Whidborne

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