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World Conference on Structural Control and Monitoring 4WCSCM-183 Kijewski-Correa, Su, Abittan, Antsaklis 1
 

Summary: 4th
World Conference on Structural Control and Monitoring 4WCSCM-183
Kijewski-Correa, Su, Abittan, Antsaklis 1
ON THE USE OF HETEROGENEOUS, WIRELESS SENSOR NETWORKS FOR DAMAGE
ASSESSMENT IN BRIDGES UNDER UNKNOWN EXCITATIONS
T. Kijewski-Correa, S. Su, E. Abittan, P.J. Antsaklis
University of Notre Dame, Notre Dame, IN 46556 USA
tkijewsk@nd.edu, ssu@nd.edu, abittan.1@nd.edu, antsaklis.1@nd.edu
Abstract
A multi-scale wireless sensor network was previously introduced by the authors and their collaborators, integrating data from a
heterogeneous sensor array for a more robust and effective approach to damage detection. This multi-scale network concept was
developed to improve power efficiency, minimize packet loss and latency, and eliminate synchronization issues through the use
of decentralized analysis schemes and the activation of sub-networks only in the vicinity of suspected damage. Specific focus is
given here to the vibration-based damage detection algorithms operating in the lower tier or micro-network, which do not require
knowledge of the system input. Two approaches for decentralized system identification are evaluated: Method 1 is a transfer
function-based approach, while Method 2 derives its damage sensitive feature directly from regressive model coefficients. Both
use heterogeneous sensor measurements in lieu of measured inputs to the system. The utility of data fusion, spatially and
temporally, within the upper tier or meso-network is also demonstrated as a means of reducing both false positives and false
negatives.
Introduction

  

Source: Antsaklis, Panos - Department of Electrical Engineering, University of Notre Dame

 

Collections: Engineering