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Study on the Damage Diagnosis of an Cantilever Beams using PZT Actuator and PVDF Sensor  

권대규 (전북대학교 생체정보공학부)
임숙정 (전북대학교 기계공학과 대학)
유기호 (전북대학교 기계항공시스템공학)
이성철 (전북대학교 기계항공시스템공학부)
Publication Information
Journal of the Korean Society for Precision Engineering / v.21, no.5, 2004 , pp. 73-82 More about this Journal
Abstract
This paper presents the study on damage diagnosis of an intelligent cantilevered beams using PZT actuator and PVDF sensor This study provides the theoretical and experimental verification to examine structural damage. Time domain analysis for the non-destructive detection of damage is presented by parameterized partial differential equations and Galerkin approximation techniques. The time histories of the vibration response of structure were used to identify the presence of damage. Furthermore, this systematic approach permits one to use the piezomaterials to both excite and sense the vibration of structures. We also carried out the experimental verification about reliability of theoretical methods fur detecting the damage of a composite beam with PZT actuator and PVDF sensor. Experimental results are presented from tests on cantilevered composite beams which is damaged at different location and different dimensions. The results were compared with the simulation results. Good agreement between the results was found for the time shifts and amplitude difference in transients response of the cantilevered beam.
Keywords
Structural damage; Time domain; Cantilevered composite beams; Piezoelectric sensor; Damping coefficient;
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