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A comparative study of delta- and z-based output feedback pole placement adaptive controllers
Flynn, M.; Ringwood, John
This paper selects a popular z-domain adaptive controller based on output feedback pole placement, utilising recursive least squares for system identification. The adaptive algorithm is recast in the delta-domain with a corresponding reformulation of the identification algorithm. Simulation results, incorporating finite word-length effects, are convincingly used to demonstrate the improvement in the delta formulation, when smaller word-lengths are used. Small word lengths are a feature of most popular industrial controllers. In addition, a pilot-scale rig is used as an application example to demonstrate the effectiveness of the delta controller in real-life implementation. The paper concludes by comparing and contrasting the z- and delta-controllers not only in performance terms but also in terms of design complexity, intuitive appeal and cost benefits.
Keyword(s): z-domain adaptive controller; algorithm; word length; delta-controller
Publication Date:
1995
Type: Book chapter
Peer-Reviewed: Yes
Institution: Maynooth University
Citation(s): Flynn, M. and Ringwood, John (1995) A comparative study of delta- and z-based output feedback pole placement adaptive controllers. In: Proceedings of the Irish DSP and Control Colloquium (IDSPCC '95). Belfast, June 1995, pp. 47-54.
Publisher(s): Belfast, June 1995
File Format(s): other
Related Link(s): https://mural.maynoothuniversity.ie/9532/6/JR-Comparative-Study-1995.pdf
First Indexed: 2020-04-02 06:21:38 Last Updated: 2021-07-31 07:45:19