Multiple damage localization using local modal filters
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AGH University of Science and Technology, Department of Robotics and Mechatronics, al. Mickiewicza 30, 30-059 Krakow
Publication date: 2017-12-20
Diagnostyka 2014;15(3):15–21
The structural health monitoring systems seeks to increase the accuracy of diagnosis. Increasingly, raw information about the occurrence of damage is not sufficient. The aim is to determine its location, identification, and even predictions about its propagation. Based on these requirements already in 1993 Rytter [1] proposed the classification of monitoring systems by dividing them into levels from 1 (detection) to 4 (prognosis). To meet the assumptions a method of fault location using local modal filters was developed [2], which was the extension of damage detection method based on spatial filtering [3]. The method of local modal filters correctly locates damage on the object. However, there is a possibility that the multiple damage can occur in the object. In this paper the author will answer the question whether this method will be effective in this type of situation. In the simulations consecutively damages of varying size and location were introduced in the object and it was checked whether they are detectable, and as their increasing number affects the accuracy of location.