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三维悬线式力矩器是高密度光学头系统中的核心组件,其等效平动刚度和转动刚度直接决定着光学头克服和补偿系统误差的能力。该文根据三维悬线式力矩器的悬浮支撑模型,依据外力作用下悬线的变形协调关系,利用卡氏最小功原理建立了三维悬线式力矩器在各个有效运动方向上的等效刚度模型。进而由等效刚度可计算出三维悬线式力矩器的固有频率。最后利用Doppler激光测振仪对实验样品进行固有频率测试,实验结果与理论结果相比,最大误差不超过8.5%。该等效刚度模型对力矩器可动部的设计具有重要的理论指导作用。
The three-dimensional over-the-line torque converter is the core component in a high-density optical head system. Its equivalent translation stiffness and rotational stiffness directly determine the ability of the optical pickup to overcome and compensate system errors. According to the suspension support model of the three-dimensional suspension wire torque converter and the deformation coordination of the suspension wire under the action of external force, the equivalent stiffness model of the three-dimensional suspension wire torque converter in each effective movement direction is established by using the principle of minimum work force . Further, the natural frequency of the three-dimensional suspended line torque converter can be calculated from the equivalent stiffness. Finally, the Doppler laser vibrometer was used to test the natural frequencies of the experimental samples. The experimental results show that the maximum error is less than 8.5% compared with the theoretical results. The equivalent stiffness model has an important theoretical guidance on the design of the movable part of the torque converter.