Non-linear system identification techniques for determination of the acoustic properties of perforates
2015 (English)In: 21st AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2015Conference paper (Refereed)Text
This paper discusses the use of nonlinear system identification techniques for determination of linear acoustic impedance and non-linear acoustic properties of perforates and other facing sheets used in aircraft engine liners. Multiple input single output nonlinear system identification techniques are revisited and applied to the problem of nonlinear acoustic characterisation of perforates. Bi-linear signal analysis techniques are also tested as well as Hilbert transform techniques applicable for non-stationary and nonlinear problems. It is shown that random excitation nonlinear system identification techniques have the potential of identifying and characterising non-linear acoustic properties of these types of samples.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2015.
IdentifiersURN: urn:nbn:se:kth:diva-187410ScopusID: 2-s2.0-84962590677OAI: oai:DiVA.org:kth-187410DiVA: diva2:930673
21st AIAA/CEAS Aeroacoustics Conference, 2015; Dallas; United States
QC 201605252016-05-252016-05-232016-05-25Bibliographically approved