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首页> 外文期刊>IEEE / ASME Transactions on Mechatronics >Head-Positioning Control Using Resonant Modes in Hard Disk Drives
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Head-Positioning Control Using Resonant Modes in Hard Disk Drives

机译：在硬盘驱动器中使用共振模式的磁头定位控制

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The best way to enhance the input/output (I/O) performance of a hard disk drive is by increasing the spindle speed. Therefore, the effect of windage vibrations caused by the airflow increases as the spindle speed increases. The servo bandwidth is limited by the primary resonant frequency of the mechanical system. However, the frequencies of the windage vibrations are higher than the primary resonant frequency. Accordingly, these frequencies are also above the servo bandwidth and are too high to be controlled by a conventional control system. In response to this problem, we have developed two methods for designing a servo control system that can suppress the windage vibrations. One method uses a stable mechanical resonant mode, and the other uses a stable resonant mode created by a digital filter. By using these methods, the head-positioning system can control the vibrations above the frequency of the primary resonant mode and the servo bandwidth. Application of these methods to actual hard disk drives showed that they can greatly decrease the windage vibrations, in which the peak frequency is about six times the open-loop gain 0-dB crossover frequency.
机译：增强硬盘驱动器输入/输出（I / O）性能的最佳方法是提高主轴速度。因此，由气流引起的风振振动的影响随着主轴速度的增加而增加。伺服带宽受机械系统的主共振频率限制。但是，风振振动的频率高于初级共振频率。因此，这些频率也高于伺服带宽并且太高而不能由常规控制系统控制。针对这一问题，我们开发了两种方法来设计可以抑制风振的伺服控制系统。一种方法使用稳定的机械谐振模式，另一种方法使用由数字滤波器创建的稳定的谐振模式。通过使用这些方法，磁头定位系统可以将振动控制在主共振模式频率和伺服带宽以上。这些方法在实际硬盘驱动器中的应用表明，它们可以大大降低风振，其峰值频率约为开环增益0-dB交叉频率的六倍。

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