SBIR Phase I: Commutational Ramp Load Disk Drive Actuator

这个小企业创新研究（SBIR）第一阶段项目开发了一种独特的变革性斜坡负载硬盘驱动器，通过提高性能和降低成本，对现有的斜坡负载技术进行了重大改进。坡道用于停放磁盘驱动器驱动器的读/写磁头，以避免由于驱动器受到外部冲击而导致磁头/磁盘撞击。该项目活动包括应用研究和设计一种新型独特的换向磁盘驱动器驱动器，该驱动器执行斜坡加载/卸载和硬盘驱动器臂的搜索操作。换向执行器是磁体/线圈组件、偏磁特性和斜坡的协同组合。与目前使用的传统斜坡负载执行器相比，换向执行器的尺寸和成本都更小。由于要求执行器臂通过磁过渡区，从而减小了尺寸和成本，该磁过渡区在斜坡上的执行器臂扫描角范围内呈现不可控的奇异区域。为了促进通过不可控的单一区域，将开发一种特殊的头部装卸闭环控制算法，以提供通过该过渡区域的故障安全操作。该项目的广泛影响/商业潜力是即时和长期的。直接的商业潜力是每年5亿单位的磁盘驱动器市场的具体应用，用于计算机，服务器，数据备份系统，通信技术和许多消费产品，如dvr和相机。换向执行器预计每年将产生超过1亿美元的直接商业影响，基于实现的磁盘驱动器制造成本节约0.20美元/个驱动器。它还将使磁盘驱动器组件的尺寸减小，从而有助于进一步小型化硬盘驱动器，而不会影响性能。

This Small Business Innovation Research (SBIR) Phase I project develops a unique and transformative ramp load hard disk drive actuator that provides significant improvements over existing ramp load technology by increasing performance and reducing costs. A ramp is used to park the read/write heads of the disk drive actuator to avoid head/disk impact due to an external shock to the drive. The project activity consists of applied research and design of a new and unique commutational disk drive actuator that performs the ramp load/unload and seeking operations for the arm of a hard disk drive. The commutational actuator is a synergistic combination of a magnet/coil assembly, magnetic bias feature, and ramp. The commutational actuator is of reduced size and cost compared to conventional ramp load actuators that are currently used. The reduced size and cost are facilitated by requiring the actuator arm to travel through a magnetic transition zone which presents an uncontrollable, singular region within the actuator arm sweep angle on the ramp. To promote travel through the uncontrollable, singular region, a special head loading/unloading closed-loop control algorithm that will be developed to provide failsafe operation through this transition zone.The broader impact/commercial potential of this project is immediate and long-term. The immediate commercial potential is the specific application to the 500 million units per year disk drive market for computers, servers, data backup systems, communication technologies and many consumer products such as DVRs and cameras. The commutational actuator is expected to have a direct commercial impact exceeding $100 million per year, based on a realized disk drive manufacturing cost savings of $0.20 per drive. It will also enable reduction in size of the disk drive assembly, thus helping in further miniaturizing the hard disk drive without impacting performance.