In this article, an implementation of the so-called "novelty detection" method to monitor damage in structures is proposed. Whereas conventional damage identification procedures have the limitation of requiring a sufficiently precise mathematical model of the structure, the novelty detection approach requires no "a priori" model, making the method mote applicable to systems of arbitrary complexity. The method, which is described in detail, has been applied to a cantilevered beam with a closing crack simulated by using a non-linear Finite Element model. The effects of measurement noise on the performance of the method has been analysed and sensitivity of the method to structural alterations assessed.
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