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Global Frequency Estimations Using Adaptive Identifiers

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Abstract:
Department of Electrical, Electronic & Computer Engineering, University of Pretoria, South Africa will talk on Global Frequency Estimations Using Adaptive Identifiers On-line estimation of the frequencies of a signal which is the sum of $n$ sinusoidals with unknown amplitudes, frequencies and phases is made through yet another well-known and simple system theoretical tool --- adaptive identifiers. Convergence of the proposed estimator is proved. The new frequency estimator is of $3n$ order, as compared to the order $5n-1$ resulting from Marino-Tomei observers. Results are demonstrated via simulation.

http://www.up.ac.za/academic/ee/profiles/xia.html
Type of Seminar:
Public Seminar
Speaker:
Prof. Xiaohua XIA
Department of Electrical, Electronic & Computer Engineering, University of Pretoria, South Africa
Date/Time:
Aug 27, 2001   11:00
Location:

ETH Zentrum, Physikstrasse 3, 8006 Zurich, ETL K 25
Contact Person:

Prof. M. Morari
No downloadable files available.
Biographical Sketch:
Mr. Xia got his D.Eng at Beijing University of Aeronautics and Astronautics, Beijing, China in 1989. After working for 5 years in the same university after PhD, he went to University of Stuttgart as an Alexander von Humboldt fellow for about two years. He made two short stays in Ecole Centrale de Nantes/France and National University of Singapore during the period of two years from 1996 to 1997, both as a post-doctoral fellow. He joined the University of Pretoria since 1998 first as an associate professor then a full professor. Dr. Xia is a Senior IEEE member, is currently the South African IEEE Section/Control Chapter Chair. He also serves for IFAC as an associate editor of Automatica. His research interests include: Non-linear feedback control, observer design, time-delay systems, hybrid systems, very recently control applications to HIV/AIDS. He is supported as scientist (B classification) by the National Research Foundation of South Africa.