DocumentCode :
1243055
Title :
Delta-Modulation Coding Redesign for Feedback-Controlled Systems
Author :
Canudas-de-Wit, Carlos ; Gòmez-Estern, Fabio ; Rubio, Francisco Rodrìguez
Author_Institution :
Dept. of Autom. Control, Polytech. of Grenoble, Grenoble
Volume :
56
Issue :
7
fYear :
2009
fDate :
7/1/2009 12:00:00 AM
Firstpage :
2684
Lastpage :
2696
Abstract :
This paper investigates the closed-loop properties of the differential coding scheme known as delta-modulation (Delta-M) when used in feedback loops within the context of feedback controlled systems. We propose a new modified scheme of the original form of the Delta-M algorithm which is better suited for applications where the sensed information is used in feedback. A state feedback controller is implemented with the state estimated by a predictor based differential decoder. Stability of the resulting closed-loop system (controller-coder-decoder) is studied. These properties (stability and performance) depend on the quantization parameter Delta, which is assumed constant in the first part of this paper. In a further step, parameter Delta is made adaptive, by defining an adaptation law exclusively in terms of information available at both the transmitter and receiver side. With this approach both stability and performance is improved.
Keywords :
closed loop systems; control engineering computing; decoding; delta modulation; modulation coding; stability; state feedback; closed-loop system; delta-modulation coding redesign; differential coding scheme; feedback controlled system; networked controlled system; predictor based differential decoder; quantization parameter; stability; state feedback controller; Delta-modulation ($Delta$- $M$); differential coding; networked controlled systems (NCS);
fLanguage :
English
Journal_Title :
Industrial Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0046
Type :
jour
DOI :
10.1109/TIE.2009.2020079
Filename :
4815508
Link To Document :
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