Imperial College London

ProfessorRobertIstepanian

Faculty of MedicineInstitute of Global Health Innovation

Visiting Professor
 
 
 
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Contact

 

+44 (0)7554 342 293robert.istepanian Website

 
 
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Location

 

Central FacultyFaculty BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wu:2000:10.1049/ip-cta:20000750,
author = {Wu, J and Chen, S and Li, G and Istepanian, RH and Chu, J},
doi = {10.1049/ip-cta:20000750},
journal = {IEE Proceedings: Control Theory and Applications},
pages = {664--672},
title = {Shift and delta operator realisations for digital controllers with finite word length considerations},
url = {http://dx.doi.org/10.1049/ip-cta:20000750},
volume = {147},
year = {2000}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The implementation issues of digital controllers with finite word length (FWL) considerations are addressed. Both the shift and delta operator parameterisations of a general controller structure are considered. A unified formulation is adopted to derive a computationally tractable stability related measure that describes FWL closed-loop stability characteristics of different controller realisations. Within a given operator parameterisation, the optimal FWL controller realisation, which maximises the proposed stability related measure, is the solution of a nonlinear optimisation problem. The relationship between the z-operator and δ-operator controller parameterisations is analysed, and it is shown that the δ parameterisation has a better FWL closed-loop stability margin than the z-domain approach under a mild condition. A design example is included to verify the theoretical analysis and to illustrate the proposed optimisation procedure. © IEE, 2000.
AU - Wu,J
AU - Chen,S
AU - Li,G
AU - Istepanian,RH
AU - Chu,J
DO - 10.1049/ip-cta:20000750
EP - 672
PY - 2000///
SN - 1350-2379
SP - 664
TI - Shift and delta operator realisations for digital controllers with finite word length considerations
T2 - IEE Proceedings: Control Theory and Applications
UR - http://dx.doi.org/10.1049/ip-cta:20000750
VL - 147
ER -