Optimization of adaptive feedforward repeatable run-out cancellation for positioning control system of hard disk drives
Optimization of adaptive feedforward repeatable run-out cancellation for positioning control system of hard disk drives
复制标题
硬盘驱动器定位控制系统自适应前馈可重复跳动消除优化
DOI：
10.1007/s00542-012-1613-y
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Atsumi
中科院分区：
文献类型：
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作者：
S. Yabui;A. Okuyama;Masahito Kobayashi;T. Atsumi
为了提高硬盘驱动器的记录密度，抑制干扰至关重要。在本文中，我们重点关注可重复跳动的抑制。本文提出了一种能够抑制周期性扰动的自适应前馈抵消（AFC）的设计方法。 AFC是自适应滤波器。该算法可以转换为线性时不变（LTI）模型。 LTI 模型被认为是闭环系统的峰值滤波器。因此，AFC的参数设计应考虑闭环特性。所提出的方法可以设计能够实现向量轨迹从奈奎斯特图上的临界点[− 1, 0]后退的参数。因此，AFC的收敛性能和稳定性性能在频域得到优化。通过硬盘驱动器的仿真和实验验证了该方法的有效性。
To increase the recording density of hard disk drives, suppression of the disturbances is essential. In this paper, we focus on the suppression of repeatable run-out. This paper presents the design method of an adaptive feedforward cancellation (AFC) which can suppress a periodic disturbance. AFC is adaptive filter. The algorithm can be converted into a linear time-invariant (LTI) model. The LTI model is considered to be a peak filter for a closed loop system. Therefore, parameters of AFC should be designed in consideration of a closed loop characteristics. The proposed method can design the parameters that can achieve a vector locus to recede from the critical point [− 1, 0] on the Nyquist diagram. As a result, convergence performances and stability performances of AFC are optimized in frequency domain. The effectiveness of the proposed method is verified by the simulations and experiment of the hard disk drive.