Chen, B;
Pin, G;
Fedele, G;
Parisini, T;
(2020)
Robust Frequency-Adaptive PLL with Lyapunov Stability Guarantees.
In:
2020 IEEE Conference on Control Technology and Applications (CCTA).
(pp. pp. 498-503).
IEEE: Montreal, QC, Canada, Canada.
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Abstract
The Global Quadrature Phase-Locked-Loop (GQPLL) is a recently-devised PLL-type architecture (based on Quadrature Signal Generation) able to track a biased sinusoidal signal with unknown frequency and amplitude. The original GQPLL formulation resorted to a non-standard non-normalized adaptive law, able to guarantee the global convergence of the estimates for arbitrarily large adaptation gains, thus enabling arbitrarily fast adaptation transients. On the other side, the non-conventional adaptation law used in the original formulation makes it difficult to apply robustifying modifications of adaptive control. In this connection, the present work presents a new formulation for the PLL internal dynamics in order to obtain a convenient 1st order linear-in-the parameters error model, which can be dealt with by a conventional non-normalized adaptive law, to which a robustifying modification such as projection can be applied. The large-gain global stability of the adaptive system is proven by Lyapunov arguments. The overall adaptive PLL is named Robustified GQPLL (RGQPLL).
| Type: | Proceedings paper |
|---|---|
| Title: | Robust Frequency-Adaptive PLL with Lyapunov Stability Guarantees |
| Event: | 2020 Conference on Control Technology and Applications |
| Location: | Montreal, Canada |
| Dates: | 24 August 2020 - 26 August 2020 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/CCTA41146.2020.9206308 |
| Publisher version: | https://doi.org/10.1109/CCTA41146.2020.9206308 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096692 |
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