Head positioning control for low sampling rate systems based on two degree-of-freedom control
Head positioning control for low sampling rate systems based on two degree-of-freedom control
复制标题
基于二自由度控制的低采样率系统头定位控制
DOI：
10.1109/20.492866
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
M. Hashimoto
中科院分区：
文献类型：
--
作者：
J. Ishikawa;Y. Yanagita;T. Hattori;M. Hashimoto
为了提高高密度硬盘驱动器中的格式化效率，希望减少嵌入伺服信号的数量。因此，伺服系统的采样率已经变得越来越低。在这种情况下，仅使用反馈控制器难以实现快速寻轨。本文提出了一种基于二自由度控制的高速寻轨技术。一个新的参考模型的开发重点是通过有效地使用音圈电机，它的功能作为一个磁盘磁头致动器的快速磁道搜索的实现。该模型生成参考轨迹，允许高速移动。此外，为了在各种干扰下快速地将磁盘磁头安置到目标磁道，开发了使二次性能指标最小化的初始值补偿（IVC）方法。实验结果，使用一个3-1/2英寸的硬盘驱动器，证实了所提出的方法的有效性。
To enhance formatting efficiency in high density hard disk drives, it is desirable to decrease the number of embedded servo signals. As a consequence, the sampling rate of servo systems has been becoming lower. In this situation, it is difficult to attain fast track seeking by using only a feedback controller. This paper presents a high-speed track seek technique, based on two degree-of-freedom control. A new reference model is developed by focusing on the attainment of fast track seeking through the effective use of a voice coil motor, which functions as a disk head actuator. The model generates reference trajectories, allowing high-speed movement. Also, in order to quickly settle the disk head to a target track under various disturbances, an initial value compensation (IVC) method to minimize a quadratic performance index is developed. Experimental results, using a 3-1/2 inch hard disk drive, confirm the validity of the proposed method.