Coupling controller design for MISO system of head positioning control systems in HDDs
Coupling controller design for MISO system of head positioning control systems in HDDs
复制标题
硬盘磁头定位控制系统MISO系统耦合控制器设计
DOI：
10.1109/tmag.2020.2978156
复制
发表时间：
2020
影响因子：
2.1
通讯作者：
Inoue Tsuyoshi
中科院分区：
文献类型：
--
作者：
Yabui Shota;Atsumi Takenori;Inoue Tsuyoshi
需要磁头定位控制系统来提高定位精度，从而增加硬盘驱动器（HDD）的记录容量。现有的头部定位控制系统采用包括音圈电机（VCM）和压电致动器的双级致动器系统。控制系统是一个多输入单输出系统，必须为两个执行器设计位置控制器。在本文中，我们提出一种耦合控制器的设计方法，用于硬盘磁头定位控制系统。所提出的方法设计的控制器，通过考虑之间的相互作用的VCM和压电执行器。该方法比目前广泛应用于双级执行器系统控制器设计的解耦控制器设计方法复杂。然而，它在控制器设计中提供了更大的自由度。主要优点是，当整个反馈回路稳定时，不需要稳定每个致动器的反馈回路。设计结果表明，与解耦控制器设计相比，所提出的设计方法可以提高定位精度。此外，通过使用耦合控制器的设计，压电致动器的所需的行程量减少。
Head positioning control systems are required to improve the positioning accuracy and thus increase the recording capacity of hard disk drives (HDDs). Existing head positioning control systems employ a dual-stage actuator system comprising a voice coil motor (VCM) and a piezoactuator. The control system is a multi-input single-output system, and positioning controllers must be designed for both actuators. In this article, we propose a coupling controller design method for head positioning control systems of HDDs. The proposed method designs the controllers by considering the interaction between the VCM and the piezoactuator. It is more complex than the decoupling controller design method, which is widely used to design the controllers for the dual-stage actuator system. Nevertheless, it provides greater freedom in the controller design. The main advantage is, when the entire feedback loop is stabilized, the feedback loop for each actuator does not need to be stabilized. The design results show that the proposed design method can improve the positioning accuracy with comparison to the decoupling controller design. Moreover, the amount of the required stroke of the piezoactuator is decreased by using the coupling controller design.