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公开(公告)号：US5241433A
公开(公告)日：1993-08-31
申请号：US965038
申请日：1992-10-22
申请人： Todd B. Anderson , Mark E. Bofferding , Martin R. Green , Mark D. Hagen , Joseph M. Humel , William J. Hunt , Lawrence P. Segar , John J. Stephenson , Michael C. Stich
发明人： Todd B. Anderson , Mark E. Bofferding , Martin R. Green , Mark D. Hagen , Joseph M. Humel , William J. Hunt , Lawrence P. Segar , John J. Stephenson , Michael C. Stich
IPC分类号： G11B5/596
CPC分类号： G11B5/59655
摘要： In a disk storage device dedicated servo system, a reference track is written in the outer guardband of the servo surface and each of the data surfaces. Supplemental position error signal (PES) values are obtained from the difference of servo and data surface samples at a plurality of locations around the disk and stored for access during read/write operations. The supplemental PES values are combined with the dedicated surface PES values to yield a composite PES that more accurately follows the data track centerline of the disk surface being addressed. The supplemental PES values are also periodically updated. To provide a more accurate correction of the composite PES, two consecutive supplemental values are used and an interpolation is calculated to provide a continuously changing supplemental PES value for modification of each sector actuator drive pulse between the two current supplemental PES values. Provision is also made in the apparatus to make the correction technique tolerant of tangential skew that may make tracks unreadable because of early or late timing through the provision of sequences of alternative early and later sample sector sequences.
摘要翻译： 在盘存储装置专用伺服系统中，将参考轨迹写入伺服表面的外保护带和每个数据表面。 补充位置误差信号（PES）值是从磁盘周围的多个位置处的伺服和数据表面采样的差异获得的，并且在读/写操作期间被存储用于存取。 补充的PES值与专用表面PES值组合以产生更精确地跟随被寻址的盘表面的数据轨道中心线的复合PES。 补充的PES值也被定期更新。 为了提供复合PES的更准确的校正，使用两个连续的补充值，并且计算插值以提供连续改变的补充PES值，以修改两个当前补充PES值之间的每个扇区致动器驱动脉冲。 在装置中也作出规定，以使得校正技术能够容忍切向偏斜，由于提供替代的早期和后期采样扇区序列的序列，可能导致轨迹不可读，因为它们的早期或晚期定时。
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公开(公告)号：US5119250A
公开(公告)日：1992-06-02
申请号：US538958
申请日：1990-06-15
CPC分类号： G11B21/083
摘要： Disclosed is a method for performing a seek operation in a disk drive using current in the saturation mode to accelerate and decelerate the actuator arm. In a first embodiment, several measurements are made during the acceleration portion of the seek to estimate the deceleration available in saturation mode. In a second embodiment, the point at which the current is switched from acceleration current to deceleration current is adjusted based upon the position where the actuator arm comes within a desired amount of the velocity of a velocity profile assuming worst case conditions.
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公开(公告)号：US4697127A
公开(公告)日：1987-09-29
申请号：US871949
申请日：1986-06-09
CPC分类号： G11B21/106 , G05D3/1454 , G11B21/085
摘要： A controller for a voice coil motor driven disk file actuator is described. The device has an online adjustable gain characteristic for controlling movement of the actuator assembly and an estimator that estimates actuator velocity and bias. Forward gain is estimated from position and coil current measurements and compared with a nominal value to create an error signal used to adjust the controller and estimator gain characteristics. The control technique allows changes in the open loop system without changing the closed loop performance. By monitoring loop gain it is possible to alter compensator gains to maintain a constant closed loop performance.
摘要翻译： 描述了一种用于音圈马达驱动盘文件驱动器的控制器。 该装置具有用于控制致动器组件的运动的在线可调节增益特性和估计致动器速度和偏压的估计器。 从位置和线圈电流测量估计正向增益，并与标称值进行比较，以创建用于调整控制器和估计器增益特性的误差信号。 控制技术允许开环系统的变化，而不改变闭环性能。 通过监控回路增益，可以改变补偿器增益以保持恒定的闭环性能。
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4.发明授权Faster access time in a disk drive by utilizing increased VCM potential voltage 失效通过利用增加的VCM电位电压在磁盘驱动器中更快地访问时间公开(公告)号：US06181502B2
公开(公告)日：2001-01-30
申请号：US09108597
申请日：1998-07-01
IPC分类号： G11B1518
CPC分类号： G11B21/083 , G11B5/5547
摘要： A disk drive includes a voice coil motor (VCM) and a VCM power source circuit which is coupled to a standard power supply having a fixed voltage. During seek operations the VCM power source circuit provides a boosted voltage, greater than the fixed supply voltage, for the VCM. The VCM power source circuit provides the boosted voltage independently from the back EMF generated in the voice coil motor. The increased VCM voltage allows faster access times and more efficient VCM operation.
摘要翻译： 磁盘驱动器包括耦合到具有固定电压的标准电源的音圈电动机（VCM）和VCM电源电路。 在寻道操作期间，VCM电源电路为VCM提供大于固定电源电压的升压电压。 VCM电源电路独立于音圈电机中产生的反电动势提供升压电压。 增加的VCM电压允许更快的访问时间和更有效的VCM操作。
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5.发明授权
公开(公告)号：US5381282A
公开(公告)日：1995-01-10
申请号：US779438
申请日：1991-10-18
CPC分类号： G11B5/596
摘要： A direct access storage device and a method of operation thereof where the output of the circuit which controls energy to the position actuator for the head may be changed at times between receipt of sequential position error signals from the medium. Instead of waiting for the next position error signal, a computation is done based on at least the current position and the desired position of the head as to when the head velocity will be equal to a desired velocity. The optimum time to switch is estimated, the energy required to achieve a predetermined velocity and a predetermined offset with respect to the desired position are computed, and operation is conducted accordingly. The amount of energy may again be changed at a time subsequent to the estimated time. The predetermined velocity and the predetermined offset may be zero or may have values other than zero in accordance with the requirements of the track following controller.
摘要翻译： 一种直接存取存储装置及其操作方法，其中可以在接收到来自介质的连续位置误差信号之间的时候改变控制头部位置致动器的能量的电路的输出。 代替等待下一个位置误差信号，至少基于头部的当前位置和期望位置来计算关于头部速度将等于期望速度的时间。 估计最佳切换时间，计算实现预定速度所需的能量和相对于期望位置的预定偏移量，并相应地进行操作。 在估计时间之后的时间，能量的量再次可以改变。 预定速度和预定偏移可以为零，或者可以根据跟踪跟踪控制器的要求具有除零之外的值。
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公开(公告)号：US4477750A
公开(公告)日：1984-10-16
申请号：US378968
申请日：1982-05-17
CPC分类号： G01P3/66 , G11B19/28 , H02P23/186
摘要： A three level motor speed control for a device such as a magnetic disk drive requiring a closely regulated running speed provides for acceleration, deceleration, obtaining close speed regulation and maintaining speed regulation of a rotating device during operation. The first level control provides acceleration or deceleration while checking velocity each eighth revolution and the second level control uses single revolutions to measure speed over an accurate rotational distance to obtain close speed regulation. Both level one and level two are controlled by the device controller. During run conditions with no error signal, a third level of control of the closely regulated velocity is maintained by separate hardware circuits which frees the processor for other uses. An error condition forces control to level one for re-establishment of the regulated running speed and a command to stop the drive forces control to level one for deceleration and stop procedures.
摘要翻译： 用于诸如需要紧密调节的运行速度的磁盘驱动器的装置的三级电动机速度控制提供加速，减速，获得紧密的速度调节并且在运行期间保持旋转装置的速度调节。 第一级控制提供加速或减速，同时检查每八分之一转的速度，第二级控制使用单次转速来测量精确旋转距离上的速度以获得紧密的速度调节。 一级和二级均由设备控制器控制。 在没有错误信号的运行条件下，通过单独的硬件电路来维持紧密调节的速度的第三级控制，这使得处理器可以释放其他用途。 误差条件迫使控制到一级，以重新建立调节运行速度，并且命令停止驱动力控制到一级以减速和停止程序。
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