Active online system identification of switch mode DC-DC power converter based on efficient recursive DCD-IIR adaptive filter

Maher Algreer, Matthew Armstrong, Damian Giaouris

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

This paper introduces a novel technique for online system identification. Specific attention is given to the parameter estimation of dc-dc switched-mode power converters; however, the proposed method can be applied to many alternative applications where efficient and accurate parameter estimation is required. The proposed technique is computationally efficient, based on a dichotomous coordinate descent algorithm, and uses an infinite impulse response adaptive filter as the plant model. The system identification technique reduces the computational complexity of existing recursive least squares algorithms. Importantly, the proposed method is also able to identify the parameters quickly and accurately, thus offering an efficient hardware solution that is well suited to real-time applications. Simulation analysis and validation based on experimental data obtained from a prototype synchronous dc-dc buck converter is presented. Results clearly demonstrate that the estimated parameters of the dc-dc converter are a very close match to those of the experimental system. The approach can be directly embedded into adaptive and self-tuning digital controllers to improve the control performance of a wide range of industrial and commercial applications.

Original languageEnglish
Article number6168842
Pages (from-to)4425-4435
Number of pages11
JournalIEEE Transactions on Power Electronics
Volume27
Issue number11
DOIs
Publication statusPublished - 3 Jul 2012

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