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Composite material and piezoelectric coefficient uncertainty effects on structural health monitoring using feedback control gains as damage indicators

Umesh, K and Ganguli, Ranjan (2011) Composite material and piezoelectric coefficient uncertainty effects on structural health monitoring using feedback control gains as damage indicators. In: Structural Health Monitoring, 10 (2). pp. 115-129.

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Official URL: http://shm.sagepub.com/content/10/2/115.abstract

Abstract

This article addresses uncertainty effect on the health monitoring of a smart structure using control gain shifts as damage indicators. A finite element model of the smart composite plate with surface-bonded piezoelectric sensors and actuators is formulated using first-order shear deformation theory and a matrix crack model is integrated into the finite element model. A constant gain velocity/position feedback control algorithm is used to provide active damping to the structure. Numerical results show that the response of the structure is changed due to matrix cracks and this change can be compensated by actively tuning the feedback controller. This change in control gain can be used as a damage indicator for structural health monitoring. Monte Carlo simulation is conducted to study the effect of material uncertainty on the damage indicator by considering composite material properties and piezoelectric coefficients as independent random variables. It is found that the change in position feedback control gain is a robust damage indicator.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Sage Publications.
Keywords: smart composite;matrix crack;material uncertainty;Monte Carlo simulation
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 15 Apr 2011 05:26
Last Modified: 15 Apr 2011 05:26
URI: http://eprints.iisc.ernet.in/id/eprint/36720

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