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1. 发明授权

US5969899A Enhanced method and system of unloading magnetic heads 失效
标题翻译：磁头卸载增强方法及系统
公开(公告)号：US5969899A
公开(公告)日：1999-10-19
申请号：US832029
申请日：1997-04-02
申请人： Michael R. Utenick , Dan A. Hunter , James M. Jones , Thomas L. Andrews, Jr.
发明人： Michael R. Utenick , Dan A. Hunter , James M. Jones , Thomas L. Andrews, Jr.
IPC分类号： G11B5/54 , G11B5/60 , G11B21/12 , G11B5/596
CPC分类号： G11B21/12 , G11B5/54 , G11B5/6005
摘要： An enhanced method and system for unloading magnetic heads are disclosed. The system limits the maximum and minimum speed of the actuator while unloading the heads during a power failure. A BEMF control circuit monitors the velocity of the actuator using the BEMF of the actuator as a gauge of the velocity. The BEMF control circuit uses a sense resistor to remove the inherent resistive component of the actuator from its BEMF measurement. If the velocity of the actuator increases above a safe level the BEMF control circuit decreases actuator current to prevent further acceleration. If the velocity of the actuator decreases below a safe level the BEMF control circuit increases the actuator current to accelerate the actuator to a safe level.
摘要翻译：公开了一种用于卸载磁头的增强方法和系统。在停电期间卸载磁头时，系统会限制执行器的最大和最小速度。 BEMF控制电路使用致动器的BEMF作为速度的量度来监视致动器的速度。 BEMF控制电路使用检测电阻从其BEMF测量中去除致动器的固有电阻分量。如果执行器的速度增加到高于安全水平，BEMF控制电路会降低执行器电流，以防止进一步加速。如果执行器的速度降低到安全水平以下，BEMF控制电路会增加执行器电流，从而将执行器加速到一个安全的水平。

2. 发明授权

US5559648A Method for optimizing track location during servo writing 失效
标题翻译：伺服写入时优化轨迹位置的方法
公开(公告)号：US5559648A
公开(公告)日：1996-09-24
申请号：US106264
申请日：1993-08-13
申请人： Dan A. Hunter , Michael R. Utenick , James H. Morehouse , Nelson Chenkin
发明人： Dan A. Hunter , Michael R. Utenick , James H. Morehouse , Nelson Chenkin
IPC分类号： G11B5/596
CPC分类号： G11B5/59633
摘要： A method for optimizing the storage capacity of miniature disk drives without affecting reliability or yields of the disk drives uses an iterative seek process to define track zero. Initially, a physical reference point is defined and a transducer is moved in coarse steps from the physical reference point until interference with a stationery loading ramp or other mechanical component, hereinafter, "ramp," is detected. Upon detection of interference, the transducer is moved one coarse step away from the ramp and then the transducer is moved in fine steps towards the ramp until interference is again detected. Upon detection of interference, the transducer is moved away from the ramp a predetermined distance. After the transducer is moved the predetermined distance, a check is made for interference. If interference is detected, the transducer is moved in fine step towards the center of the disk until interference is no longer detected. When interference is no longer detected, the transducer is moved a predetermined distance and the resulting location of the transducer is defined as track zero.
摘要翻译：用于优化微型磁盘驱动器的存储容量而不影响磁盘驱动器的可靠性或产出的方法使用迭代寻找过程来定义磁道零。首先，定义物理参考点，并且传感器以物理参考点的粗略步骤移动，直到检测到文具装载斜坡或其他机械部件的干扰（以下称为“斜坡”）。在检测到干扰之后，将换能器从斜坡移开一个粗略的步骤，然后将传感器以细微的步骤朝向斜坡移动，直到再次检测到干扰。当检测到干扰时，换能器从斜坡移动预定距离。在传感器移动预定距离之后，检查干扰。如果检测到干扰，则转换器朝向磁盘的中心微细地移动，直到不再检测到干扰。当不再检测到干扰时，传感器移动预定距离，并将传感器的最终位置定义为轨迹零。

3. 发明授权

US6097564A Method for precise velocity feedback control in an actuator system of a disk drive 失效
标题翻译：用于在磁盘驱动器的致动器系统中进行精确速度反馈控制的方法
公开(公告)号：US6097564A
公开(公告)日：2000-08-01
申请号：US658772
申请日：1996-06-05
申请人： Dan A. Hunter
发明人： Dan A. Hunter
IPC分类号： G11B5/54 , G11B5/60 , G11B21/08 , G11B5/596
CPC分类号： G11B21/083 , G11B5/5534 , G11B5/59627
摘要： A velocity-controlled actuator system and method are usable in low velocity, high load situations such as those encountered in dynamic head loading, and in normal situations. The velocity-controlled actuator system utilizes a self-tuning estimator that is calibrated during operation of said disk drive. Consequently, parameters, characteristics, and any other features of the disk drive that affect operation of the actuator system are compensated for in real time by the calibration process. The velocity-controlled actuator system dynamically adjusts the actuator resistance utilized in the reconstruction of the back EMF voltage by utilizing a self-tuning estimate of the actuator resistance that compensates for any changes in the actuator resistance over time.
摘要翻译：速度控制的致动器系统和方法可用于低速度，高负载情况，例如在动态头部加载中遇到的那些，并且在正常情况下。速度控制的致动器系统利用在所述盘驱动器的操作期间被校准的自调节估计器。因此，影响驱动器系统运行的磁盘驱动器的参数，特性和任何其他特征通过校准过程实时补偿。速度控制的致动器系统通过利用致动器电阻的自调节估计来动态地调整在重建反电动势电压中所使用的致动器电阻，其补偿致动器电阻随时间的任何变化。

4. 发明授权

US5949608A Time dependent velocity-controlled disk drive actuator system 失效
标题翻译：时间依赖速度控制的磁盘驱动器执行器系统
公开(公告)号：US5949608A
公开(公告)日：1999-09-07
申请号：US659204
申请日：1996-06-05
申请人： Dan A. Hunter
发明人： Dan A. Hunter
IPC分类号： G11B21/12 , G11B5/55 , G11B5/596
CPC分类号： G11B5/5534 , G11B5/5547
摘要： A velocity-controlled actuator system and method are usable in low velocity, high load situations such as those encountered in dynamic head loading, and in normal situations. The velocity-controlled actuator system utilizes a self-tuning estimator that is calibrated during operation of said disk drive. Consequently, parameters, characteristics, and any other features of the disk drive that affect operation of the actuator system are compensated for in real time by the calibration process. The velocity-controlled actuator system dynamically adjusts the actuator resistance utilized in the reconstruction of the back EMF voltage by utilizing a self-tuning estimate of the actuator resistance that compensates for any changes in the actuator resistance over time.
摘要翻译：速度控制的致动器系统和方法可用于低速度，高负载情况，例如在动态头部加载中遇到的那些，并且在正常情况下。速度控制的致动器系统利用在所述盘驱动器的操作期间被校准的自调节估计器。因此，影响驱动器系统运行的磁盘驱动器的参数，特性和任何其他特征通过校准过程实时补偿。速度控制的致动器系统通过利用致动器电阻的自调节估计来动态地调整在重建反电动势电压中所使用的致动器电阻，其补偿致动器电阻随时间的任何变化。

5. 发明授权

US4811132A Early end of tape sensing for a cache buffered tape drive 失效
标题翻译：缓存磁带驱动器磁带检测的早期结束
公开(公告)号：US4811132A
公开(公告)日：1989-03-07
申请号：US912935
申请日：1986-09-26
申请人： Dan A. Hunter , Lawrence F. Opperman , George Gooras
发明人： Dan A. Hunter , Lawrence F. Opperman , George Gooras
IPC分类号： G11B15/093 , G11B27/17 , G11B15/48 , B65H59/38
CPC分类号： G11B27/17 , G11B15/093 , G11B2220/90
摘要： An early end of tape sensing subsystem for a data processing system, including a host computer, a cache buffer, and a magnetic tape drive subsystem utilizes outputs dependent upon the movement of a capstan wheel, swing arm, and file reel of the magnetic tape drive subsystem, determining the net movement of tape therein in order to measure the circumference of the file reel plus tape thereon. Whenever a series of valid readings from a conventional sensor are obtained indicating that the circumference of the file reel plus tape is approaching that of the circumference of the file reel itself (i.e., no tape on the file reel), a signal is sent to the microprocessor controlling the cache buffer, said signal indicating that the end of the tape is approaching.
摘要翻译：用于数据处理系统的磁带检测子系统的早期结束，包括主计算机，高速缓冲存储器和磁带驱动器子系统利用输出取决于磁带驱动器的绞盘轮，摆臂和文件卷轴的移动子系统，确定其中的带的净移动，以便测量文件卷轴加上其上的带的周长。每当获得来自传统传感器的一系列有效读数，表示文件卷轴加上磁带的圆周接近文件卷轴本身的圆周（即文件卷轴上没有磁带）时，将信号发送到微处理器控制高速缓冲存储器，所述信号指示磁带的末端正在接近。

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