板结构冲击载荷光纤布拉格光栅定位

onstructed by a fiber Bragg grating(FBG) sensor network, the identification system of impact localization aims at low speed impact load positioning, was, in which the distribution of correlation dimension and the distance between sensors and impact points were studied through regarding the correlation dimension of impact response signal time series as an impact characteristic. Based on the correlation, coordinated identification conducted by tri-circle model was achieved. The typical aeronautical plate structure was divided into several areas, where the configuration of FBG sensors was optimized according to algorithm characteristics. As a result, the impact monitoring system was built and the low speed impact test was carried on. The result showed that the 10 testing random impact points on the 30cm×30cm plate structure were all identified correctly with the 3.5 cm average error of coordinated identification. We are able to effectively take advantage of the impact load location identification by using 6 FBG sensors and providing a reference for combination of fractal theory with impact monitoring technology