A differential fiber Bragg grating (FBG) accelerometer was designed to solve the conflict of sensitivity and natural frequency for the conventional accelerometer with cantilever-mass structure. The system model was established and the measurement precision was theoretically calculated and analyzed. The sensor structure combined central beam and tiny beam was designed, which is an improved style of conventional cantilever-mass structure. The finite element simulation and analysis on static and dynamic characteristics proved that the system accuracy was 0.0105�]��g�� and the natural frequency was 270�]Hz, which was 2.7 times of the natural frequency of a conventional cantilever-mass FBG accelerometer under same precision. Results also proved that the natural frequency could be increased without decreasing the sensitivity in this new differential FBG accelerometer.
Liu Huilan, Feng Lishuang, Teng Li, Lin Heng.Design and simulation of sensor of differential fiber Bragg grating accelerometer[J] JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2006,V32(11): 1369-1372
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