In this work, we propose the use of a magnetic damper in the FBG-based cantilever accelerometer (FCA) to reduce the distortion of signal due to the infinite signal amplification at the resonant frequency. The magnetic damper comprises a permanent magnet and a U-shape aluminum structure. The permanent magnet serves as a load and is attached to one end of the cantilever whereas the aluminum structure serves as a damper to suppress the cantilever resonance. In the experiment, it is found that the distortion on the detected signal by FCA is reduced when the damper is incorporated, and the detected signal has a higher cross-correlation coefficient (CCC) with a reference signal from a standard capacitive based accelerometer. The introduction of a magnetic damper enables the vibration detection of the FCA in the resonant frequency region with reduced signal distortion and it widens the detection range of the FCA.

在这项工作中，我们建议在基于FBG的悬臂加速度计（FCA）中使用电磁阻尼器，以减少由于在谐振频率上无限放大信号而引起的信号失真。磁阻尼器包括永磁体和U形铝结构。永磁体用作负载并连​​接到悬臂的一端，而铝结构用作阻尼器以抑制悬臂共振。在实验中，发现当并入阻尼器时，FCA对检测到的信号的失真减小了，并且检测到的信号与基于标准电容式加速度计的参考信号具有更高的互相关系数（CCC）。