Pressure-sensitive paint measurement on co-rotating disks in a hard disk drive
Pressure-sensitive paint measurement on co-rotating disks in a hard disk drive
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DOI：
10.1016/j.optlaseng.2011.06.022
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发表时间：
2012-01-01
影响因子：
4.6
通讯作者：
Niimi, Tomohide
中科院分区：
文献类型：
--
作者：
Kameya, Tomohiro;Matsuda, Yu;Niimi, Tomohide
随着近年来信息技术的快速发展，沿着着对硬盘驱动器（HDD）性能的改进有很大的需求。虽然HDD的高速盘旋转对于适应这样的需求是必要的，但是其导致由盘上的压力波动引起的盘颤动，并且降低了HOD的可靠性。为了理解颤振现象的机理，了解旋转圆盘上的压力场是很重要的。然而，不可能通过测压口等普通方法测量压力。压敏漆（PSP）是一种基于氧猝灭发光的压力测量技术，使我们能够非侵入性地测量压力。然而，通常情况下，PSP的温度敏感性使得难以测量具有温度分布的表面上的精确压力。采用芘磺酸（PySO 3 H）组成的温度不敏感PSP作为发光体，首次测量了10 000-20 000 rpm转速下旋转圆盘上的时均压力。结果发现，压力形成一个同心圆分布，并朝着盘的中心减少。此外，我们阐明如何磁盘转速和间距同向旋转磁盘上的压力场的影响。(C)2011爱思唯尔有限公司保留所有权利。
There is much demand for improvement in the performance of a hard disk drive (HDD) along with recent rapid developments of information technology. While high-speed disk rotation of a HDD is necessary to accommodate such needs, it causes disk flutter induced by pressure fluctuation on disks and degrades reliability of a HOD. In order to understand the mechanism of the fluttering phenomenon, it is important to know pressure field on the rotating disk. However, it is impossible to measure the pressure by ordinary methods such as pressure taps. Pressure-sensitive paint (PSP) is a pressure measurement technique based on the oxygen quenching of luminescence and enables us to measure the pressure non-invasively. In general, however, the temperature sensitivity of PSP makes it difficult to measure the precise pressure on the surface with temperature distribution. We measured the time-averaged pressure on the disk rotating at 10 000-20 000 rpm for the first time by adopting a temperature-insensitive PSP composed of pyrene sulfonic acid (PySO3H) as a luminophore. It was found that the pressure forms a concentric circular distribution and decreases toward the center of the disk. Additionally, we elucidate how disk rotational speed and spacing between co-rotating disks influence on the pressure field. (C) 2011 Elsevier Ltd. All rights reserved.