In order to improve the performance of pendulum resonant accelerometer,a pendulum micro-lever structure is designed by integrating mass block and microlever structure,which realizes the sensitivity and inertial force amplification and improves the robustness of the structure.Firstly,the mechanical model of microlever structure is established and the key parameters are calculated.Subsequently,according to the theoretical model of microlever structure magnification,the impacts of dimensional parameters of the mass block,supporting beams,and micro-lever structure on the amplification factor are analyzed.Both theoretical analysis and finite element simulation results suggested that the width of the pivot beam and output beam should be regarded as key optimization parameters for such micro-lever structures.Finally,based on these findings,optimization of the existing structural dimensions is conducted,resulting in an optimized micro-lever amplification factor of 15.68,a system amplification factor of 12.88,and a scale factor of 70.52 Hz/g,reflecting improvements of 36.94%,36.87%,and 36.88%higher than before optimization.The effectiveness of the optimization method is verified.
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