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11. 发明授权

US07193797B1 Method and apparatus for detecting and monitoring a bi-state head when self-servowriting a disk drive using spiral servo information 有权
标题翻译：当使用螺旋伺服信息自动伺服磁盘驱动器时，用于检测和监视双态磁头的方法和装置
公开(公告)号：US07193797B1
公开(公告)日：2007-03-20
申请号：US11102470
申请日：2005-04-08
申请人： Yu Sun , Don Brunnett
发明人： Yu Sun , Don Brunnett
IPC分类号： G11B27/36
CPC分类号： G11B20/1217 , G11B5/59633 , G11B5/59666 , G11B27/36 , G11B2020/1282
摘要： The present invention is directed to a method and apparatus for detecting and monitoring a bi-state head when self-servowriting a disk drive. In one embodiment, an integration window is opened about an expected time that a read head will read spiral servo information. An integration value associated with the integration window is determined. Next, a determination is made as to whether the integration value is less than a predetermined low amplitude limit. If it is, a comparison is made between a location of a maximum sync frame of a read signal envelope in the integration window and the center of the integration window. The read head is identified as a bi-state head if the location of the maximum sync frame is greater than a predetermined off-center limit relative to the location of the center of the integration window.
摘要翻译：本发明涉及一种用于在自伺服磁盘驱动器时检测和监视双态磁头的方法和装置。在一个实施例中，关于读取头将读取螺旋伺服信息的期望时间打开积分窗口。确定与集成窗口相关联的积分值。接下来，确定积分值是否小于预定的低振幅限制。如果是，则在积分窗口中的读信号包络的最大同步帧的位置与积分窗的中心进行比较。如果最大同步帧的位置相对于积分窗口的中心的位置大于预定的偏心极限，则读头被识别为双态头。

12. 发明授权

US06765747B1 Method and apparatus for reducing low frequency repeatable runout in hard disk drive 有权
标题翻译：用于降低硬盘驱动器中低频可重复跳动的方法和装置
公开(公告)号：US06765747B1
公开(公告)日：2004-07-20
申请号：US10010557
申请日：2001-11-07
申请人： Yu Sun , Don Brunnett
发明人： Yu Sun , Don Brunnett
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A method and apparatus are disclosed which allow for compensation of repeatable runout in a disk drive when an actuator arm assembly has a relatively high friction to inertia ratio in a pivot bearing assembly. The compensation uses one of two initial runout coefficients, based on a seek length. If the seek length is shorter than a predetermined distance, a current runout coefficient is used to compensate for repeatable runout which is continuously updated throughout a previous seek operation. If the seek length is greater than the predetermined distance, a transient runout coefficient is used to compensate for repeatable runout which is updated following the initial revolutions of the hard disk.
摘要翻译：公开了一种方法和装置，当致动器臂组件在枢转轴承组件中具有相对较高的摩擦惯性比时，允许在盘驱动器中补偿可重复的跳动。基于寻道长度，补偿使用两个初始跳动系数之一。如果寻找长度小于预定距离，则使用电流跳动系数来补偿在先前的寻找操作中不断更新的可重复跳动。如果搜索长度大于预定距离，则使用瞬时跳动系数来补偿在硬盘的初始转动之后更新的可重复跳动。

13. 发明授权

US07545593B1 Magnetic storage systems and methods with tighter write fault window to improve reliability 失效
标题翻译：磁存储系统和方法具有更严格的写入故障窗口，以提高可靠性
公开(公告)号：US07545593B1
公开(公告)日：2009-06-09
申请号：US11075285
申请日：2005-03-08
申请人： Yu Sun , Bill Flynn , Don Brunnett
发明人： Yu Sun , Bill Flynn , Don Brunnett
IPC分类号： G11B27/36 , G11B15/04 , G11B19/04 , G11B5/596
CPC分类号： G11B19/045 , G11B5/596 , G11B5/59627
摘要： A magnetic storage system includes a disk, a head, an actuator, and a servo controller. The servo controller monitors a value, such as a position error signal (PES) sample value, a predicted PES sample value, and the like, that is based on servo information provided by the head. The servo controller provides a signal to inhibit writing by the head based on a comparison of the monitored value with a threshold, such as a write fault window (WFW), a PES plus Velocity (PPV) threshold, and the like. The servo controller sets the threshold to a first value based on at least one of an on-track track misregistration (TMR) value and a seek settle TMR value. When the servo controller determines that the head is subject to a vibration condition, the servo controller sets the threshold to a second value that is different from the first value.
摘要翻译：磁存储系统包括盘，头，致动器和伺服控制器。伺服控制器基于由头提供的伺服信息来监视诸如位置误差信号（PES）采样值，预测的PES采样值等的值。伺服控制器基于监视值与诸如写入故障窗口（WFW），PES加速度（PPV）阈值等的阈值的比较来提供用于禁止头部写入的信号。伺服控制器基于轨道磁道重合失调（TMR）值和寻道稳定TMR值中的至少一个将阈值设置为第一值。当伺服控制器确定头受到振动条件时，伺服控制器将阈值设置为不同于第一值的第二值。

14. 发明授权

US07489469B2 Embedded runout correction based on written-in runout measurement 有权
标题翻译：基于写入跳动测量的嵌入式跳动校正
公开(公告)号：US07489469B2
公开(公告)日：2009-02-10
申请号：US11724436
申请日：2007-03-15
申请人： Yu Sun , Don Brunnett , Lloyd Levy , Thomas O. Melrose
发明人： Yu Sun , Don Brunnett , Lloyd Levy , Thomas O. Melrose
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/59633
摘要： Performing embedded runout correction for a track on a rotational data storage disk includes measuring written-in runout for the track, selecting a number of revolutions in response to the measured written-in runout of the track, calculating embedded correction values for the track for the selected number of revolutions of the rotational data storage disk, and storing the embedded correction values.
摘要翻译：对旋转数据存储盘上的轨道执行嵌入式跳动校正包括测量轨道的写入跳动，响应于轨迹的测量写入跳动选择转数，计算轨道的嵌入校正值选择旋转数据存储盘的转数，并存储嵌入的校正值。

15. 发明授权

US06987638B1 Method and apparatus for applying adaptive non-linear repeatable runout compensation in a disk drive 失效
标题翻译：在磁盘驱动器中应用自适应非线性可重复跳动补偿的方法和装置
公开(公告)号：US06987638B1
公开(公告)日：2006-01-17
申请号：US10430898
申请日：2003-05-05
申请人： Don Brunnett , Yu Sun
发明人： Don Brunnett , Yu Sun
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： A method and apparatus for applying adaptive non-linear repeatable runout compensation in a disk drive is provided. In one embodiment, the present invention provides a disk surface having a track written thereon, wherein the track includes repeatable runout. A non-linear converge gain is applied to compensate for the repeatable runout. In one embodiment, the converge gain is based upon an amplitude of a position error signal associated with the repeatable runout at a frequency of rotation of the disk surface (or multiple thereof).
摘要翻译：提供了一种在磁盘驱动器中应用自适应非线性可重复跳动补偿的方法和装置。在一个实施例中，本发明提供具有写在其上的轨道的盘表面，其中轨道包括可重复的跳动。应用非线性收敛增益来补偿可重复的跳动。在一个实施例中，会聚增益基于与盘表面（或其多个）的旋转频率处的可重复跳动相关联的位置误差信号的幅度。

16. 发明授权

US07423834B1 Convolution based multiple harmonic frequency repeatable runout compensation method and apparatus 失效
标题翻译：基于卷积的多谐波频率可重复的跳动补偿方法和装置
公开(公告)号：US07423834B1
公开(公告)日：2008-09-09
申请号：US11005130
申请日：2004-12-06
申请人： Yu Sun , Don Brunnett
发明人： Yu Sun , Don Brunnett
IPC分类号： G11B5/596
CPC分类号： G11B5/59627
摘要： Real-time correction of repeatable runout for multiple harmonic frequencies is provided by using convolution of a position error signal, or similar real-time signal, with an impulse response of a specific transfer function, such as the inverse of the disturbance transfer function. Multiple harmonic frequencies can be followed substantially simultaneously to achieve small position error and good tracking misregistration (TMR) performance. The impulse response can be obtained, calculated and stored off-line. The impulse response can be configured to substantially eliminate correction of one or more frequency or frequency ranges. Convolution can be done relatively quickly with proper arrangement of memory.
摘要翻译：通过使用位置误差信号或类似实时信号的卷积与特定传递函数的脉冲响应（例如干扰传递函数的倒数）来提供多重谐波频率的可重复跳动的实时校正。可以基本上同时跟踪多个谐波频率，以实现小位置误差和良好的跟踪重合失调（TMR）性能。脉冲响应可以获得，计算和离线存储。脉冲响应可以被配置为基本上消除一个或多个频率或频率范围的校正。卷积可以通过适当的记忆排列相对较快地进行。

17. 发明授权

US06977794B1 Asymmetric seek velocity profile to improve power failure reliability for rigid disk drive with ramp 失效
标题翻译：非对称寻道速度曲线，以提高具有斜坡的刚性磁盘驱动器的停电可靠性
公开(公告)号：US06977794B1
公开(公告)日：2005-12-20
申请号：US09905563
申请日：2001-07-13
申请人： Yu Sun , Mark Rice , Don Brunnett
发明人： Yu Sun , Mark Rice , Don Brunnett
IPC分类号： G11B5/55 , G11B5/596 , G11B21/02
CPC分类号： G11B5/5526 , G11B5/5547
摘要： A disk drive having a control system which adjusts seek velocity profiles is disclosed. The seek velocity profile is adjusted based on the direction of the seek and the location of the target track. If the seek is away from the ramp, the seek velocity profile is not adjusted. If the seek is toward the ramp, the control system determines the location of the target track. If the target track is within a predefined distance of the ramp, and the transducer velocity exceeds a predetermined velocity, the seek velocity profile is adjusted to limit the deceleration current. The adjustment may be a preset factor, or may be a variable factor depending upon the distance from the target track to the ramp.
摘要翻译：公开了一种具有调整寻道速度分布的控制系统的磁盘驱动器。根据寻道方向和目标轨迹的位置来调整寻道速度分布。如果寻道远离斜坡，寻道速度曲线不被调整。如果寻道朝向坡道，则控制系统确定目标轨道的位置。如果目标轨迹在斜坡的预定距离内，并且换能器速度超过预定速度，则调整寻道速度曲线以限制减速电流。调整可以是预设因子，或者可以是根据从目标轨道到斜坡的距离的可变因子。

18. 发明授权

US07414809B2 Servo writing using radially overlapped servo segments 有权
标题翻译：伺服写入使用径向重叠的伺服段
公开(公告)号：US07414809B2
公开(公告)日：2008-08-19
申请号：US11750820
申请日：2007-05-18
申请人： S. Craig Smith , Stan Shepherd , Yu Sun , Yuan Roy Chen , Lin Guo
发明人： S. Craig Smith , Stan Shepherd , Yu Sun , Yuan Roy Chen , Lin Guo
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59661 , G11B5/59666
摘要： In accordance with various embodiments, initial servo data are written to a storage medium as a series of radially overlapped spiral segments. Final servo data are thereafter written to the medium while concurrently servoing on said overlapped segments.
摘要翻译：根据各种实施例，初始伺服数据作为一系列径向重叠的螺旋段被写入存储介质。最后伺服数据此后被写入介质，同时在所述重叠段上进行伺服。

19. 发明授权

US07215499B1 Multi-stage actuator disk drive and methods for controlling a transducer with settle-switching state dependent feed-forward control 有权
标题翻译：多级致动器盘驱动器和用于控制具有稳定开关状态相关前馈控制的换能器的方法
公开(公告)号：US07215499B1
公开(公告)日：2007-05-08
申请号：US11180283
申请日：2005-07-13
申请人： Yunfeng Li , Yu Sun , Lin Guo , Xiaoping Hu
发明人： Yunfeng Li , Yu Sun , Lin Guo , Xiaoping Hu
IPC分类号： G11B21/02
CPC分类号： G11B5/5547 , G11B5/5552
摘要： A disk drive and method are provided for controlling seeking of a transducer that is adjacent to a rotatable data storage disk in a disk drive. The disk drive includes an actuator for positioning the transducer relative to the disk, the method comprising. The actuator is controlled to move the transducer toward a target track on the disk during an initial phase of a seek mode during which the transducer is primarily accelerated toward the target track. During a settle phase of the seek mode which follows the initial phase the actuator is controlled to settle the transducer onto the target track. An initial position, an initial velocity, and an initial acceleration of the transducer are determined at a phase switch time at about when control of the actuator switches from the initial phase to the settle phase of the seek mode. Feed-forward control information is generated based on the determined initial position, initial velocity, and initial acceleration of the transducer. The actuator is controlled responsive to the feed-forward control information to settle the transducer onto the target track during the settle phase of the seek mode.
摘要翻译：提供了一种磁盘驱动器和方法，用于控制寻找与磁盘驱动器中的可旋转数据存储盘相邻的换能器。磁盘驱动器包括用于相对于盘定位换能器的致动器，该方法包括。在寻像模式的初始阶段期间，致动器被控制以将传感器移向盘上的目标轨道，在该模式期间，换能器主要朝向目标轨道加速。在跟随初始阶段的搜索模式的稳定阶段期间，致动器被控制以将换能器定位到目标轨道上。在致动器的控制从寻找模式的初始阶段到稳定阶段切换的时刻，在相位切换时刻确定换能器的初始位置，初始速度和初始加速度。基于确定的换能器的初始位置，初始速度和初始加速度产生前馈控制信息。响应于前馈控制信息控制致动器，以在搜索模式的稳定阶段期间将换能器稳定在目标轨道上。

20. 发明授权

US07116513B1 Positioning transducers based on a compensation scheme that varies based on transducer vibrational state 有权
标题翻译：基于基于传感器振动状态变化的补偿方案来定位换能器
公开(公告)号：US07116513B1
公开(公告)日：2006-10-03
申请号：US10999552
申请日：2004-11-30
申请人： Yu Sun , Lin Guo , Xiaoping Hu
发明人： Yu Sun , Lin Guo , Xiaoping Hu
IPC分类号： G11B5/596
CPC分类号： G11B5/5582 , G11B19/04
摘要： A disk drive includes a transducer and a rotatable disk, which includes a plurality of tracks. A vibration state of the transducer relative to the disk is determined. The transducer is positioned relative one of the tracks based on a compensation scheme that varies based on the determination of the vibration state. The compensation scheme may be varied by selecting among output of two or more compensators, based on the determined of the vibration state of the transducer, to control positioning of the transducer. The compensation scheme may alternatively, or additionally, be varied by varying a contribution from a vibration state actuator compensator to the control of positioning of the transducer. The vibration state actuator compensator is configured to improve transducer track following while the transducer is subjected to vibration.
摘要翻译：磁盘驱动器包括换能器和可旋转盘，其包括多个轨道。确定换能器相对于盘的振动状态。基于基于振动状态的确定而变化的补偿方案，换能器相对于轨道定位。可以通过基于确定的换能器的振动状态来选择两个或多个补偿器的输出来改变补偿方案，以控制换能器的定位。可以通过改变从振动状态致动器补偿器对转换器的定位的控制的贡献来替代或另外地改变补偿方案。振动状态致动器补偿器配置成在传感器经受振动时改善传感器轨迹跟随。

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