公开(公告)号：US5237466A

公开(公告)日：1993-08-17

申请号：US430992

申请日：1989-11-02

申请人： Thomas W. Glaser ,  Richard Greenberg ,  Hjalmar H. Ottesen

发明人： Thomas W. Glaser ,  Richard Greenberg ,  Hjalmar H. Ottesen

IPC分类号： G06F3/06 ,  G06F11/20 ,  G11B19/12 ,  G11B19/28 ,  G11B20/12 ,  G11B27/00 ,  G11B27/10 ,  G11C29/00

CPC分类号： G06F11/2069 ,  G11B19/12 ,  G11B19/28 ,  G11B27/002 ,  G11B27/10 ,  G11C29/74 ,  G11B2220/20 ,  G11B2220/415

摘要： A data processing system is disclosed having a direct access storage device (DASD) subsystem comprising a number of separate physical housings, each housing having a number of disk supporting spindles mounted therein. The velocity of rotation of the spindles within a housing is synchronized, and the rotational position of the spindles may be locked into a fixed relationship. When number N of disk supporting spindles are provided, spindle rotation is synchronized, and mirrored data files are written out of phase by 360/N degrees, thereby providing reduced latency time during a subsequent read operation, while at the same time providing data integrity through the use of redundant data files.

公开(公告)号：US4894599A

公开(公告)日：1990-01-16

申请号：US175699

申请日：1988-03-31

申请人： Hjalmar H. Ottesen ,  Yuzo Nakagawa ,  Shyunji Ono

发明人： Hjalmar H. Ottesen ,  Yuzo Nakagawa ,  Shyunji Ono

IPC分类号： G11B21/10 ,  G11B21/08 ,  H02P25/06

CPC分类号： G11B21/083

摘要： In a servo controlled device such as a disk drive actuator or a robot that is driven by a DC motor and must seek from one position to another position and settle at the target position in a minimum time, a deadbeat control response can effect settling in a minimum number of servo sample times with no steady state error and no ripple between sampling instants. The device design, initial conditions entering the deadbeat controlled mode and the frequency of servo samples can be used to enable deadbeat control by limiting the control current to a value that will not saturate the motor coil or exceed the linear operating range of the controlled device.

摘要翻译： 在由直流电动机驱动的伺服控制装置如磁盘驱动器致动器或机器人中，必须从一个位置寻找到另一个位置并在最短时间内到达目标位置，因此，无效控制响应可以在 伺服采样次数最少，无稳态误差，采样时间无纹波。 通过将控制电流限制为不会使电机线圈饱和或超过受控设备的线性工作范围的值，可以使用器件设计，进入死区控制模式的初始条件和伺服样本的频率来实现无脉动控制。

公开(公告)号：US4697127A

公开(公告)日：1987-09-29

申请号：US871949

申请日：1986-06-09

申请人： Michael C. Stich ,  John B. Resman ,  Hjalmar H. Ottesen ,  Todd B. Anderson

发明人： Michael C. Stich ,  John B. Resman ,  Hjalmar H. Ottesen ,  Todd B. Anderson

IPC分类号： G05D3/14 ,  G11B21/08 ,  G11B21/10 ,  H02P25/06 ,  G05B13/00

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。