Szczegóły publikacji
Opis bibliograficzny
Wideband excitation in nonlinear vibro-acoustic modulation for damage detection / A. KLEPKA, M. ADAMCZYK, Ł. PIECZONKA, W. J. STASZEWSKI // W: Health monitoring of structural and biological systems 2016 : Las Vegas, United States, 20–24 March 2016 / ed. Tribikram Kundu. — [Bellingham : SPIE], cop. 2016. — (Proceedings of SPIE / The International Society for Optical Engineering ; ISSN 0277-786X ; vol. 9805). — ISBN: 978-1-5106-0046-1. — S. 980513-1–980513-7. — Bibliogr. s. 980513-6–980513-7, Abstr.
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 99340 |
|---|---|
| Data dodania do BaDAP | 2016-08-09 |
| DOI | 10.1117/12.2218805 |
| Rok publikacji | 2016 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
| Konferencja | Health monitoring of structural and biological systems 2016 |
| Czasopismo/seria | Proceedings of SPIE / The International Society for Optical Engineering |
Abstract
The paper discusses the use of wideband excitation in nonlinear vibro-acoustic modulation technique (VAM) used for damage detection. In its original form, two mono-harmonic signals (low and high frequency) are used for excitation. The low frequency excitation is typically selected based on a modal analysis test and high frequency excitation is selected arbitrarily in the ultrasonic frequency range. This paper presents a different approach with use of wideband excitation signals. The proposed approach gives the possibility to simplify the testing procedure by omitting the modal test used to determine the value of low frequency excitation. Simultaneous use of wideband excitation for high frequency solves the ambiguity related to the selection of the frequency of acoustic wave. Broadband excitation signals require, however, more elaborate signal processing methods to determine the intensity of modulation for a given bandwidth. The paper discusses the proposed approach and the related signal processing procedure. Experimental validation of the proposed technique is performed on a laminated composite plate with a barely visible impact damage that was generated in an impact test. Piezoceramic actuators are used for vibration excitation and a scanning laser vibrometer is used for noncontact data acquisition.