Taming Vibration of Rotating Disk/Spindle Systems

项目名称：i.y. (Steve) Shen，华盛顿大学提案编号：cms -9820745提案标题：控制旋转磁盘/主轴系统的振动项目摘要：在过去的3年中，磁盘驱动器行业已经将磁道密度提高了两倍，转速提高了一倍，以增加存储容量并减少数据访问时间。因此，磁盘和主轴振动成为一个关键问题和主要关注。一般来说，旋转盘/主轴系统有两种振动：面内振动和面外振动。为了抑制面内振动，业界正在开发带动液轴承的精密主轴。为了抑制面外振动，业界正在开发替代磁盘基板，如层压磁盘。因为这些发展都是最近才出现的，所以业界对其基本了解甚少，而且目前几乎不存在知识库。在这些迫切需求的激励下，提出的研究是(a)建立一个数学模型来预测带有流体动力轴承的转盘/主轴系统的振动响应，以及(b)评估在高速旋转和摇摆下替代盘基的阻尼性能。对于流体动力主轴，研究重点将是转轴设计和非线性刚度效应。对于替代衬底，研究将解决层压盘的两个最基本的问题：频域分析和温度效应。建议研究的成功将为业界提供基本的理解和知识基础，以便在这些领域取得重大突破。所提出的研究结果也将对其他采用小型、高速和精密主轴电机的行业有用，例如DVD（数字多功能磁盘）行业。

PI's Name, Institution: I. Y. (Steve) Shen, University of WashingtonProposal Number: CMS-9820745Proposal Title: Taming Vibration of Rotating Disk/Spindle SystemsProject Abstract: For the past 3 years, the disk drive industry has tripled the track density and doubled the rotational speed to increase storage capacity and to reduce data access time. As a result, disk and spindle vibration becomes a critical issue and a major concern. In general, rotating disk/spindle systems present two types of vibration: in-plane and out-of-plane. To suppress the in-plane vibration, the industry is developing precision spindles with hydrodynamic bearings. To suppress the out-of-plane vibration, the industry is developing alternative disk substrates such as laminated disks. Because these developments are fairly recent, the industry has very little fundamental understanding, and knowledge bases are almost nonexistent at present.Motivated by these imminent needs, the proposed research is (a) to develop a mathematical model to predict vibration response of rotating disk/spindle systems with hydrodynamic bearings, and (b) to evaluate damping performance of alternative disk substrates subjected to high-speed spinning and rocking, For hydrodynamic spindles, the research focus will be rotating-shaft design and nonlinear stiffness effects. For alternative substrates, the research will address two most fundamental issues of laminated disks: frequency-domain analysis and temperature effects.Success of the proposed research will provide the industry with fundamental understanding and knowledge bases to make important breakthroughs in these areas. Results of the proposed research will also be useful to other industries that employ small, high-speed, and precision spindle motors, such as DVD (Digital Versatile Disks) industry.