Robust excitation power spectrum design for broadband impedance spectroscopy
2014 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 25, no 6, 065501- p.Article in journal (Refereed) Published
This paper focuses on the robust design of broadband impedance spectroscopy (IS) experiments. This contribution extends the optimal IS experiment design presented in previous work (Sanchez et al 2012 Meas. Sci. Technol. 23 085702) in order to design a robust broadband excitation which gives relatively good estimation performance over a large number of possible impedance models. To this end, we assume as prior knowledge that the parameters of the impedance model lie in a compact set. Then, we pose the experiment design problem as a convex optimization program, which gives the excitation signal of bounded power that minimizes the worst value of a given scalar function of the Fisher information matrix, as the parameters range over the given compact set. Supported by numerical simulations, our results reveal the robust excitation for impedance experiments has a discrete power spectrum, e. g. (periodic) multisine signals.
Place, publisher, year, edition, pages
2014. Vol. 25, no 6, 065501- p.
experiment design, convex optimization theory, impedance information, impedance spectroscopy, multisine excitations
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-148639DOI: 10.1088/0957-0233/25/6/065501ISI: 000338562600045ScopusID: 2-s2.0-84899634698OAI: oai:DiVA.org:kth-148639DiVA: diva2:737209
11th International Symposium on Measurement Technology and Intelligent Instruments (ISMTII), JUL 01-03, 2013, Aachen, Germany
QC 201408122014-08-122014-08-112014-08-12Bibliographically approved