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dc.contributorFaculty of Engineeringen_US
dc.creatorWu, Bing-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/7502-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleOptimization of sparse sensor networks for damage identification using binary particle swarm optimizationen_US
dcterms.abstractThe sparse active sensor network is a thriving technique to facilitate the realization of guided-wave-based structural health monitoring (SHM). To achieve a minimal consumption of sensors with their respective optimal locations in a sparse sensor network but not at the cost of sacrificing adequate detection resolution, a sensor network design approach was developed in this study, based on binary particle swarm optimization (BPSO). To start with, Lamb waves were activated and acquired with an active sensor network first, with a series of damage scenarios sequentially appearing (mono-damage for each scenario). The optimization of the sensor network was projected to an objective function, and the minimal number of sensors requested to detect the mono-damage in each damage scenario and their respective locations were achieved by minimizing such an objective function using the BPSO. A delay-and-sum imaging algorithm was additionally introduced to present the identification results in intuitive images. Notably, the proposed optimization algorithm has been demonstrated capable of handling the sensor number and sensor location simultaneously. To validate the algorithm experimentally, the approach was used to detect up to ten stochastic damage cases in an irregular aluminum plate (to simulate a typical airplane wing section), and the results have shown the effectiveness of the approach.en_US
dcterms.extentix, 70 leaves : ill. (some col) ; 30 cm.en_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2014en_US
dcterms.educationalLevelAll Masteren_US
dcterms.educationalLevelM.Sc.en_US
dcterms.LCSHStructural health monitoringen_US
dcterms.LCSHSensor networksen_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/7502