Optimal floating-point realizations of finite-precision digital controllers
Wu, J., Chen, S., Whidborne, J.F. and Chu, J. (2002) Optimal floating-point realizations of finite-precision digital controllers. 41st IEEE Conference on Decision and Control, Las Vegas, Nevada, USA, 10 - 13 Dec 2002. , 2570-2575.
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Description/Abstract
The paper investigates the closed-loop stability issue of finite-precision realizations for digital controllers implemented in floating-point arithmetic. Unlike the existing methods which only address the effect of the mantissa bits in floating-point format to the sensitivity of closed-loop stability, the sensitivity of closed-loop stability is analyzed with respect to both the mantissa and exponent bits of floating-point format. A computationally tractable finite word length (FWL) closed-loop stability measure is defined, and the optimal controller realization problem is posed as searching for a floating-point realization that maximizes the proposed measure. A numerical optimization approach is adopted to solve for the resulting optimization problem. Simulation results show that the proposed design procedure yields computationally efficient controller realizations with enhanced FWL closed-loop stability performance.
| Item Type: | Conference or Workshop Item (UNSPECIFIED) |
|---|---|
| Additional Information: | presented at IEEE Int. Conf. Decision and Control (Las Vegas, USA), Dec.10-13, 2002 Event Dates: December 10-13, 2002 Organisation: IEEE Control Systems Society |
| Divisions: | Faculty of Physical and Applied Science > Electronics and Computer Science > Comms, Signal Processing & Control |
| Item ID: | 257201 |
| Date Deposited: | 31 Jan 2003 |
| Last Modified: | 16 Aug 2012 03:20 |
| Contributors: | Wu, J. (Author) Chen, S. (Author) Whidborne, J.F. (Author) Chu, J. (Author) |
| Date: | December 2002 |
| Additional Information: | presented at IEEE Int. Conf. Decision and Control (Las Vegas, USA), Dec.10-13, 2002 Event Dates: December 10-13, 2002 Organisation: IEEE Control Systems Society |
| Status: | Published |
| Further Information: | Google Scholar |
| ISI Citation Count: | 0 |
| URI: | http://eprints.soton.ac.uk/id/eprint/257201 |
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- Optimal floating-point realizations of finite-precision digital controllers. (deposited 31 Jan 2003) [Currently Displayed]
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