硬盘磁头飞高与二级定位合成致动技术研究

发布时间：2018-01-09 15:11

本文关键词：硬盘磁头飞高与二级定位合成致动技术研究　出处：《华中科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着硬盘存储密度的不断提高，对磁头定位技术和磁头飞高控制技术的要求也愈来愈高。虽然当前普遍使用的一级定位技术和热飞高控制技术均能满足需求，但是一级定位技术势必无法继续支持磁盘密度的进一步提高。同时，，在磁头不断小型化的情况下，二级定位致动器以及热飞高控制器的制造和安装将变得困难。二级定位技术和热飞高控制技术可以分别描述为平行于和垂直于磁盘盘面的位移控制技术，因此可以对这两种技术进行合成以节约成本。在分析了磁盘及磁头的结构和工作原理的基础上，总结了合成致动技术的驱动原理和性能指标，进而对已有的电磁驱动合成致动器进行了改进，并设计出一种新型的热膨胀驱动合成致动器。在描述了电磁驱动和热膨胀驱动合成致动器的工作原理之后，分别对二者建立了实体模型，通过有限元方法进行模拟仿真。同时，基于分析影响热膨胀合成致动器性能的主要因素，对热膨胀合成致动器的结构进行了优化。通过计算，得到这两种致动器的行程、精度、响应频率和功耗均能满足合成致动器的性能要求。在对两种合成致动器进行比较后，说明热膨胀合成致动器在保持头盘系统的稳定性和成本上更有优势，进而为合成致动器的设计提供了理论依据。
[Abstract]:With the increasing of hard disk storage density, the requirements of head positioning and head height control are becoming higher and higher, although the current commonly used primary positioning technology and hot flying height control technology can meet the demand. However, the primary positioning technology is bound to be unable to continue to support the further increase of disk density. At the same time, the magnetic head continues to be miniaturized. It will be difficult to manufacture and install the two-stage position actuator and the hot flying height controller. The second stage positioning technology and the hot flying height control technology can be described as the displacement control technology parallel to and perpendicular to the disk surface respectively. Therefore, the two technologies can be synthesized to save cost. On the basis of analyzing the structure and working principle of magnetic disk and magnetic head, the driving principle and performance index of synthetic actuation technology are summarized, and the existing electromagnetic driving composite actuator is improved. A new type of thermal expansion driven synthesizer is designed. After describing the working principle of electromagnetic and thermal expansion driven composite actuators, the solid models of them are established respectively. At the same time, based on the analysis of the main factors affecting the performance of the thermal expansion synthesizer, the structure of the thermal expansion composite actuator is optimized. The stroke, precision, response frequency and power consumption of the two kinds of actuators can meet the performance requirements of the composite actuators. It is shown that the thermal expansion synthetic actuator has more advantages in maintaining the stability and cost of the head disk system, and thus provides a theoretical basis for the design of the composite actuator.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP333.35

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