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Detection and classification of structural changes using artificial immune systems and fuzzy clustering
Anaya, Maribel; Tibaduiza Burgos, Diego Alexander; Pozo Montero, Francesc
Universitat Politècnica de Catalunya. Departament de Matemàtiques; Universitat Politècnica de Catalunya. CoDAlab - Control, Dinàmica i Aplicacions
Among all the elements that are integrated into a structural health monitoring (SHM) system, methods or strategies for damage detection and classification are nowadays playing a key role in enhancing the operational reliability of critical structures in several industrial sectors. The main contribution of this paper is the application of a new methodology to detect and classify structural changes. The methodology is based on: 1) an artificial immune system (AIS) and the notion of affinity is used for the sake of damage detection; 2) a fuzzy c-means algorithm is used for damage classification. One of the advantages of the proposed methodology is the fact that to develop and validate the strategy, a model is not needed. Additionally, and in contrast to standard Lamb waves-based methods, there is no need to directly analyse the complex time-domain traces containing overlapping, multimodal and frequency dispersive wave propagation that distorts the signals and difficult the analysis. The proposed methodology is applied to data coming from two sections of an aircraft skin panel. The results indicate that the proposed methodology is able to accurately detect damage as well as classify those damages.
Àrees temàtiques de la UPC::Enginyeria electrònica
Àrees temàtiques de la UPC::Matemàtiques i estadística
Artificial immune systems
Structural health monitoring
artificial immune systems
principal component analysis
damage indices
fuzzy clustering
affinity value
Algorismes computacionals
Intel·ligència artificial -- Aplicacions

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