Displacement field estimation by distributed strain sensors is a structure-inherent method, which has many applications, e.g. in structural monitoring or in adaptive structures. Fiber Bragg grating (FBG) sensors are well suited for this purpose, since they allow measurements in many locations, high-resolution measurements and measurements with a high bandwidth. Several model-based and experimental methods of displacement field estimation were investigated and expanded. An algorithm for the displacement field estimation on complex structure geometries was developed: by using a combined model of the structure and the FBG system, the accuracy of displacement estimation could be predicted for combined thermal and mechanical loads on any given structure. This was shown on a telescope mirror. The modeling method and the sensor characteristics were verified experimentally.
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Displacement field estimation by distributed strain sensors is a structure-inherent method, which has many applications, e.g. in structural monitoring or in adaptive structures. Fiber Bragg grating (FBG) sensors are well suited for this purpose, since they allow measurements in many locations, high-resolution measurements and measurements with a high bandwidth. Several model-based and experimental methods of displacement field estimation were investigated and expanded. An algorithm for the displ...
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