Effect of External Vibration on PZT Impedance Signature
Piezoelectric ceramic Lead Zirconate Titanate (PZT) transducers, working on the principle of electromechanical impedance (EMI), are increasingly applied for structural health monitoring (SHM) in aerospace, civil and mechanical engineering. The PZT transducers are usually surface bonded to or embedde...
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| Format: | Article |
| Language: | English |
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MDPI AG
2008-11-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/8/11/6846/ |
| _version_ | 1798038665908191232 |
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| author | Yaowen Yang Aiwei Miao |
| author_facet | Yaowen Yang Aiwei Miao |
| author_sort | Yaowen Yang |
| collection | DOAJ |
| description | Piezoelectric ceramic Lead Zirconate Titanate (PZT) transducers, working on the principle of electromechanical impedance (EMI), are increasingly applied for structural health monitoring (SHM) in aerospace, civil and mechanical engineering. The PZT transducers are usually surface bonded to or embedded in a structure and subjected to actuation so as to interrogate the structure at the desired frequency range. The interrogation results in the electromechanical admittance (inverse of EMI) signatures which can be used to estimate the structural health or integrity according to the changes of the signatures. In the existing EMI method, the monitored structure is only excited by the PZT transducers for the interrogating of EMI signature, while the vibration of the structure caused by the external excitations other than the PZT actuation is not considered. However, many structures work under vibrations in practice. To monitor such structures, issues related to the effects of vibration on the EMI signature need to be addressed because these effects may lead to misinterpretation of the structural health. This paper develops an EMI model for beam structures, which takes into account the effect of beam vibration caused by the external excitations. An experimental study is carried out to verify the theoretical model. A lab size specimen with different external excitations is tested and the effect of vibration on EMI signature is discussed. |
| first_indexed | 2024-04-11T21:43:14Z |
| format | Article |
| id | doaj.art-97b851c5e0eb4a7e9d86f93528c683a9 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T21:43:14Z |
| publishDate | 2008-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-97b851c5e0eb4a7e9d86f93528c683a92022-12-22T04:01:30ZengMDPI AGSensors1424-82202008-11-018116846685910.3390/s8116846Effect of External Vibration on PZT Impedance SignatureYaowen YangAiwei MiaoPiezoelectric ceramic Lead Zirconate Titanate (PZT) transducers, working on the principle of electromechanical impedance (EMI), are increasingly applied for structural health monitoring (SHM) in aerospace, civil and mechanical engineering. The PZT transducers are usually surface bonded to or embedded in a structure and subjected to actuation so as to interrogate the structure at the desired frequency range. The interrogation results in the electromechanical admittance (inverse of EMI) signatures which can be used to estimate the structural health or integrity according to the changes of the signatures. In the existing EMI method, the monitored structure is only excited by the PZT transducers for the interrogating of EMI signature, while the vibration of the structure caused by the external excitations other than the PZT actuation is not considered. However, many structures work under vibrations in practice. To monitor such structures, issues related to the effects of vibration on the EMI signature need to be addressed because these effects may lead to misinterpretation of the structural health. This paper develops an EMI model for beam structures, which takes into account the effect of beam vibration caused by the external excitations. An experimental study is carried out to verify the theoretical model. A lab size specimen with different external excitations is tested and the effect of vibration on EMI signature is discussed.http://www.mdpi.com/1424-8220/8/11/6846/PZTelectromechanical impedancestructural health monitoringvibration |
| spellingShingle | Yaowen Yang Aiwei Miao Effect of External Vibration on PZT Impedance Signature Sensors PZT electromechanical impedance structural health monitoring vibration |
| title | Effect of External Vibration on PZT Impedance Signature |
| title_full | Effect of External Vibration on PZT Impedance Signature |
| title_fullStr | Effect of External Vibration on PZT Impedance Signature |
| title_full_unstemmed | Effect of External Vibration on PZT Impedance Signature |
| title_short | Effect of External Vibration on PZT Impedance Signature |
| title_sort | effect of external vibration on pzt impedance signature |
| topic | PZT electromechanical impedance structural health monitoring vibration |
| url | http://www.mdpi.com/1424-8220/8/11/6846/ |
| work_keys_str_mv | AT yaowenyang effectofexternalvibrationonpztimpedancesignature AT aiweimiao effectofexternalvibrationonpztimpedancesignature |