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首页> 外文期刊>IEEE Transactions on Magnetics >Alternation of Flex Cable Vibration Modes in High Precision Hard Disk Drives
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Alternation of Flex Cable Vibration Modes in High Precision Hard Disk Drives

机译：高精度硬盘驱动器中柔性电缆振动模式的变化

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摘要

For fast and accurate data accessing operations, flex cable's vibratory response has been identified to be the key development focus for magnetic hard disk drives to meet near nanometer precision accuracy. Dampening the cable's dynamics with damper layers and revising the seek servo designs have been the common approaches found in the literature to reach the requirement. In this paper, vibrations of nonuniform flex cable, which is composed of baseline flex cable layers and addition of piezoelectric layer such as polyvinylidene fluoride film, are investigated through experiments and non-classical, reduced-order finite element analysis. It is found that the addition of the piezofilm changes the cable's natural frequencies only within 3% error range but alters the cable's bending vibration mode shapes significantly. The change in the cable's mode shapes leads to change of the known cable/actuator dynamic coupling reported in the literature. Results presented in this paper establish mechanical framework for active control of the flex cable onto the rotary actuator.
机译：为了实现快速，准确的数据访问操作，软电缆的振动响应已被确定为满足近纳米精度要求的磁性硬盘驱动器的关键开发重点。用阻尼层来阻尼电缆的动力并修改寻道伺服设计已成为文献中找到满足要求的常用方法。通过实验和非经典的降阶有限元分析，研究了由基线挠性电缆层和附加的压电层（例如聚偏二氟乙烯薄膜）组成的非均匀挠性电缆的振动。发现添加压电薄膜只会在3％的误差范围内改变电缆的固有频率，但会显着改变电缆的弯曲振动模式形状。电缆的模式形状的改变导致文献中报道的已知的电缆/致动器动态耦合的改变。本文介绍的结果为主动控制旋转执行器上的柔性电缆建立了机械框架。

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