17 April 2013 Sensitivity-based optimal sensor placement of multi-type sensor
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Abstract
Integration of multi-type senor data, which is mutual complementary, is a potential way to improve the accuracy and robustness of structural damage detection method. However, the effect of damage diagnosis based on multi-sensor data integration depends on the optimal sensor placement for multi-sensor data integration. Therefore, in the paper, an innovative optimal sensor placement based on sensitivity is proposed to determine the number and locations of three kinds of sensors including accelerometers, Fiber Brag Gauges (FBG), which are generally applied in vibration tests, and piezoelectric (PZT) sensors, which are commonly used in active sensing-based structural health monitoring. With considering the boundary effect and uncertainty caused by environment, the sensitivity-based object function to detect every possible damage location is established. Computational simulation on a fixed-supported steel thin plate-like structure is implemented to evaluate minimum sensor number of accelerometers, FBG and PZT according to methods above. After that, the optimal locations and number for three kinds of sensors are calculated.
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Xiaodan Sun, Gangling Hou, Zhenqing Wang, "Sensitivity-based optimal sensor placement of multi-type sensor", Proc. SPIE 8695, Health Monitoring of Structural and Biological Systems 2013, 86953C (17 April 2013); doi: 10.1117/12.2009537; https://doi.org/10.1117/12.2009537
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