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Constructing sparse realizations of finite-precision digital controllers based on a closed-loop stability related measure

Constructing sparse realizations of finite-precision digital controllers based on a closed-loop stability related measure
Constructing sparse realizations of finite-precision digital controllers based on a closed-loop stability related measure
We present a study of the finite word length (FWL) implementation for digital controller structures with sparseness consideration. A new closed-loop stability related measure is derived, taking into account the number of trivial elements in a controller realization. A practical design procedure is presented, which first obtains a controller realization that maximizes a lower bound of the proposed measure, and then uses a stepwise algorithm to make the realization sparse. Simulation results show that the proposed design procedure yields computationally efficient controller realizations with enhanced FWL closed-loop stability performance.
1350-2379
61-68
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Chen, S.
9310a111-f79a-48b8-98c7-383ca93cbb80
Li, G.
f0f77e84-2dca-4e91-854e-156d36434431
Chu, J.
08744087-3532-4f12-9d8a-5c8e5d79be0e
Wu, J.
5a0119e5-a760-4ff5-90b9-ec69926ce501
Chen, S.
9310a111-f79a-48b8-98c7-383ca93cbb80
Li, G.
f0f77e84-2dca-4e91-854e-156d36434431
Chu, J.
08744087-3532-4f12-9d8a-5c8e5d79be0e

Wu, J., Chen, S., Li, G. and Chu, J. (2003) Constructing sparse realizations of finite-precision digital controllers based on a closed-loop stability related measure. Control Theory and Applications, IEE Proceedings, 150 (1), 61-68.

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Abstract

We present a study of the finite word length (FWL) implementation for digital controller structures with sparseness consideration. A new closed-loop stability related measure is derived, taking into account the number of trivial elements in a controller realization. A practical design procedure is presented, which first obtains a controller realization that maximizes a lower bound of the proposed measure, and then uses a stepwise algorithm to make the realization sparse. Simulation results show that the proposed design procedure yields computationally efficient controller realizations with enhanced FWL closed-loop stability performance.

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Published date: January 2003
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257273
URI: http://eprints.soton.ac.uk/id/eprint/257273
ISSN: 1350-2379
PURE UUID: aff9fcc3-b53d-4290-b1b1-453808507012

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Date deposited: 31 Jan 2003
Last modified: 20 Jan 2022 17:34

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Contributors

Author: J. Wu
Author: S. Chen
Author: G. Li
Author: J. Chu

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