Taming Vibration of Rotating Disk/Spindle Systems

主要研究者姓名，机构： I. Y.（Steve）Shen，华盛顿大学提案编号：CMS-9820745提案标题：旋转磁盘/主轴系统的振动抑制项目摘要：在过去的3年中，磁盘驱动器行业将磁道密度提高了两倍，将旋转速度提高了一倍，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。 通常，旋转磁盘/主轴系统呈现两种类型的振动：面内和面外。 为了抑制面内振动，业界正在开发具有流体动压轴承的精密主轴。 为了抑制面外振动，业界正在开发替代的盘基板，例如层压盘。 由于这些发展是相当新的，工业界还没有什么基本的了解，目前几乎不存在知识基础。受这些迫切需要的推动，拟议的研究是：（a）开发一个数学模型来预测旋转磁盘/主轴系统的振动响应与流体动力轴承，（B）评估阻尼性能的替代磁盘基板受到高速旋转和摇摆，对于流体动力主轴，研究的重点将是主轴设计和非线性刚度的影响。 对于替代基板，该研究将解决叠层磁盘的两个最基本的问题：频域分析和温度效应。拟议研究的成功将为行业提供基本的理解和知识基础，以便在这些领域取得重要突破。 建议的研究结果也将有助于其他行业，采用小型，高速，精密主轴电机，如DVD（数字多功能光盘）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.