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公开(公告)号：US5270880A
公开(公告)日：1993-12-14
申请号：US866687
申请日：1992-04-10
摘要： A method for predicting and avoiding data errors by predicting disk drive read-write inhibit requirements in response to at least two parameters including a head position error and velocity with respect to the track centerline. A write or read inhibit signal is generated in response to selected combinations of these parameters to minimize soft read errors arising from track misregistration and to avoid hard errors arising from overwriting data recorded in an adjacent track. The read and write inhibit strategy is described as a pair of linguistic control rules suitable for implementation in a Fuzzy Logic Controller.
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公开(公告)号：US5267110A
公开(公告)日：1993-11-30
申请号：US672161
申请日：1991-03-19
CPC分类号： G11B5/5521
摘要： A rotary actuator head driver for a direct access storage device includes a transducer head moving in a radial direction across a disk surface for reading and/or writing data on a plurality of tracks for storing data. A support arm supports the transducer head relative to the disk surface. The support arm is connected to a pivot defining an axis of rotation spaced from the transducer head. A head driver positions the transducer head over one track in a track following mode or moves the transducer head from one track to another track in a seek mode. The head driver generates oppositely directed forces to produce a net torque applied to the support arm through the pivot. The oppositely directed forces have a line of action orthogonal a dominant motion of the transducer head. As a result, any parasitic force is orthogonal to the dominant motion and does not contribute to track misregistration errors. When the oppositely directed forces have an equal magnitude for force cancellation, the effect parasitic forces are eliminated. The head driver includes a pair of miniature voice coil motors or an in-the-hub motor.
摘要翻译： 用于直接存取存储装置的旋转执行机构头驱动器包括一个换能器头沿径向方向跨越盘表面移动，用于在用于存储数据的多个轨道上读取和/或写入数据。 支撑臂相对于盘表面支撑换能器头。 支撑臂连接到限定与换能器头部间隔开的旋转轴线的枢轴。 头驱动器将传感器头定位在跟踪模式下的一个轨道上，或者以寻道模式将换能器头从一个轨道移动到另一个轨道。 头部驱动器产生相反方向的力，以产生通过枢轴施加到支撑臂的净扭矩。 相反方向的力具有与换能器头的主要运动正交的作用线。 结果，任何寄生力与主要运动正交，并且不会导致跟踪错位。 当相反方向的力具有相等的力消除大小时，消除了影响寄生力。 头驱动器包括一对微型音圈电机或内嵌式电机。
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3.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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4.发明授权
公开(公告)号：US5894378A
公开(公告)日：1999-04-13
申请号：US977908
申请日：1997-11-25
申请人： Akihiko Aoyagi , Zine-Eddine Boutaghou , Vijayeshwar Das Khanna , Suresh Kumar , Muthuthamby Sri-Jayantha
发明人： Akihiko Aoyagi , Zine-Eddine Boutaghou , Vijayeshwar Das Khanna , Suresh Kumar , Muthuthamby Sri-Jayantha
CPC分类号： G11B19/2009 , F16C19/522 , F16C19/54 , F16C21/00 , F16C39/02 , G11B25/043 , F16C2370/12
摘要： A technique for preventing damage to ball bearings in small form factor devices where the drive motor has at least one piezoelectric crash stop ring disposed about the shaft and inside the rotor of the motor. The crash stop ring must be dimensioned to permit only a small amount of movement of the rotor relative to the shaft. The permitted movement is less than the minimum movement which would cause damage to the elements of the ball bearing.
摘要翻译： 一种用于防止在小型装置中损坏球轴承的技术，其中驱动马达具有至少一个围绕轴设置并且位于马达的转子内部的压电止动环。 防撞圈必须具有尺寸，以便只允许转子相对于轴的少量运动。 允许的运动小于会损坏球轴承元件的最小运动。
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5.发明授权
公开(公告)号：US5608586A
公开(公告)日：1997-03-04
申请号：US327168
申请日：1994-10-21
CPC分类号： G11B5/5547 , G11B5/59627
摘要： A method and apparatus, in a direct access storage device including a head positioned for interaction with a data storage medium mounted on a rotating spindle, an actuator for positioning the head, and a servo control loop for positioning the actuator. The improvement comprises: a narrow band gain enhancing filter for connection in the servo control loop. The filter has a response frequency related to the rotational frequency of the spindle. The filter has programmable initial states. Also provided is a switch for switching in the narrow band filter as the head approaches a target position on the data storage medium. Initial states of the filter are determined and supplied to program the filter. At least one additional filter having a peak response frequency at a harmonic of the frequency of rotation of the spindle, may be provided. Initial states of the additional filters are determined and supplied to program the additional filter. The filter may include successive delay circuits for inputs to the filter, which circuits provide delayed outputs; multipliers for multiplying selected delayed outputs by a constant; and a summer for summing the delay outputs after the delayed outputs are multiplied by the multipliers. The initial states may be stored as phase, frequency and amplitude of a sine function.
摘要翻译： 一种直接存取存储装置中的方法和装置，包括：定位用于与安装在旋转主轴上的数据存储介质相互作用的头部，用于定位头部的致动器，以及用于定位致动器的伺服控制回路。 改进包括：用于在伺服控制回路中连接的窄带增益增强滤波器。 滤波器具有与主轴转速相关的响应频率。 滤波器具有可编程的初始状态。 还提供了当头部接近数据存储介质上的目标位置时用于切换窄带滤波器的开关。 滤波器的初始状态被确定并提供给编程滤波器。 可以提供至少一个具有在主轴的旋转频率的谐波处的峰值响应频率的附加滤波器。 确定并提供附加过滤器的初始状态以编程附加过滤器。 滤波器可以包括用于输入到滤波器的连续延迟电路，这些电路提供延迟的输出; 用于将选定的延迟输出乘以常数的乘法器; 以及用于将延迟输出乘以乘法器之后的延迟输出相加的加法器。 初始状态可以存储为正弦函数的相位，频率和幅度。
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6.发明授权
公开(公告)号：US5550688A
公开(公告)日：1996-08-27
申请号：US450645
申请日：1995-05-25
申请人： Akihiko Aoyagi , Zine-Eddine Boutaghou , Vijayeshwar D. Khanna , Suresh Kumar , Muthuthamby Sri-Jayantha
发明人： Akihiko Aoyagi , Zine-Eddine Boutaghou , Vijayeshwar D. Khanna , Suresh Kumar , Muthuthamby Sri-Jayantha
CPC分类号： G11B19/2009 , F16C19/522 , F16C19/54 , F16C21/00 , F16C39/02 , G11B25/043 , F16C2370/12
摘要： A technique for preventing damage to ball bearings in a small form factor device where the drive motor has at least one crash stop ring disposed about the shaft and inside the rotor of the motor. The crash stop ring is dimensioned to permit only a small amount of movement of the rotor relative to the shaft. The permitted movement must be less than the minimum movement which would cause damage to the elements of the ball bearing. In an alternative embodiment, a rotor includes a flange extending in the radial direction from the rotor. A piezoelectric ring is rigidly mounted on both sides of the flange to engage one of the planar surfaces of the flange when the piezoelectric ring is in the relaxed state. With two such crash stop rings disposed so that the rings can engage both planar surfaces of the flange, the rotor is effectively clamped between the two piezoelectric crash stop rings whenever the piezoelectric crash stop ting is disconnected from the power source used to contract the piezoelectric material in a direction parallel to the axis of rotation of the rotor.
摘要翻译： 一种用于防止在小型装置中损坏球轴承的技术，其中驱动马达具有围绕轴设置并且位于马达转子内部的至少一个止动环。 防撞环的尺寸设计为仅允许转子相对于轴的少量运动。 允许的运动必须小于会损坏球轴承元件的最小运动。 在替代实施例中，转子包括从转子沿径向方向延伸的凸缘。 当压电环处于松弛状态时，压电环刚性地安装在凸缘的两侧上，以接合凸缘的一个平面。 通过设置两个这样的碰撞止动环，使得环可以接合凸缘的两个平面表面，只要压电碰撞停止与用于收缩压电材料的电源断开，则有效地将转子夹在两个压电紧急停止环之间 在平行于转子的旋转轴线的方向上。
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7.发明授权
公开(公告)号：US6097565A
公开(公告)日：2000-08-01
申请号：US594572
申请日：1996-01-31
CPC分类号： G11B5/59627
摘要： In a direct access storage device including a rotating disk, a head positioned for interaction with said disk, an actuator for carrying said head and a servo system for operating said actuator so as to follow a substantially circular track on said disk by responding to a position error signal, a method for reducing response of the servo system to radial runout of the circular tracks, comprising the steps of obtaining radial runout data; filtering the data; storing the filtered data; subtracting the filtered data from the position error signal to obtain a corrected position error signal; and using the corrected position error signal to control the servo system. A direct access storage device in accordance with the invention includes means for obtaining radial runout data; means for filtering the data; means for storing the filtered data; means for subtracting the filtered data from the position error signal to obtain a corrected position error signal; and means for controlling the servo system using the corrected position error signal.
摘要翻译： 在包括旋转盘的直接存取存储装置中，用于与所述盘相互作用的头部，用于承载所述头部的致动器和用于操作所述致动器的伺服系统，以便通过响应于位置 误差信号，用于减小伺服系统对圆形轨道的径向跳动的响应的方法，包括以下步骤：获得径向跳动数据; 过滤数据; 存储经过滤的数据; 从位置误差信号中减去滤波后的数据，得到校正后的位置误差信号; 并使用校正的位置误差信号来控制伺服系统。 根据本发明的直接存取存储装置包括用于获得径向跳动数据的装置; 用于过滤数据的手段; 用于存储经过滤数据的装置; 用于从所述位置误差信号中减去所述滤波数据以获得校正的位置误差信号的装置; 以及用于使用校正的位置误差信号来控制伺服系统的装置。
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8.发明授权Method and apparatus for writing servo tracks of a magnetic disk unit which uses a probe to control the positioning of the head 失效用于写入使用探头来控制头部定位的磁盘单元的伺服磁道的方法和装置
公开(公告)号：US5610777A
公开(公告)日：1997-03-11
申请号：US608206
申请日：1996-02-28
申请人： Hien P. Dang , Takahiro Nakagawa , Yoshiyasu Nakamoto , Muthuthamby Sri-Jayantha , Hiroyuki Suzuki
发明人： Hien P. Dang , Takahiro Nakagawa , Yoshiyasu Nakamoto , Muthuthamby Sri-Jayantha , Hiroyuki Suzuki
CPC分类号： G11B5/59633
摘要： The present invention relates to a method and apparatus for writing servo tracks of a magnetic disk unit, and has an object of providing a servo track writing method and apparatus which can reduce a mechanical vibration of a head in the steady state and can shorten a settling time of the system. A detecting face is set in the vicinity of a head arm end portion 22 of a magnetic disk unit 2, and a capacitance probe 28 is provided as a gap detecting means for detecting a gap in a head moving direction between the detecting face and the head arm end portion 22. Further provided are a rotary positioner 26 as a positioning means for moving the capacitance probe 28 in the head moving direction to position it at a target position, and a head drive system control means for moving a head 14 of the magnetic disk unit 2 so that the gap is kept constant, to position the head 14 at a predetermined servo track writing position.
摘要翻译： 本发明涉及一种用于写入磁盘单元的伺服磁道的方法和装置，其目的在于提供一种伺服磁道写入方法和装置，其能够降低磁头在稳定状态下的机械振动并且可以缩短沉降 系统的时间。 将检测面设置在磁盘单元2的头臂端部22附近，并且设置电容探针28作为间隙检测装置，用于检测检测面和头部之间的头移动方向上的间隙 还设置有作为定位装置的旋转定位器26，该定位装置用于使磁头移动方向移动电容探针28以将其定位在目标位置;以及磁头驱动系统控制装置，用于移动磁头14的磁头14 磁盘单元2使得间隙保持恒定，以将磁头14定位在预定的伺服磁道写入位置。
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公开(公告)号：US5579186A
公开(公告)日：1996-11-26
申请号：US416587
申请日：1995-04-03
申请人： Satoshi Yamamoto , Akira Shinjoh , Isao Yoneda , Arun Sharma , Muthuthamby Sri-Jayantha , Hien P. Dang
发明人： Satoshi Yamamoto , Akira Shinjoh , Isao Yoneda , Arun Sharma , Muthuthamby Sri-Jayantha , Hien P. Dang
CPC分类号： G11B5/5543 , G11B5/59655 , G11B5/5547
摘要： In an idle state, servo information from all sectors is not used, but the servo information from every other sector or from every three or more sectors is used so that head positioning can be performed with only a minimum amount of servo information. The power to the electric circuitry of a write or read system and a servo system, which is not needed in the idle state, is interrupted, from the arrival of the selected servo information to the arrival of the next selected servo information, by a power control signal generated in accordance with the timing of the sectors. The power consumption can be reduced by the amount corresponding to turning off the circuitry not needed, plus the amount needed for computing for position control.
摘要翻译： 在空闲状态下，不使用来自所有扇区的伺服信息，而是使用来自每个其他扇区或每三个或更多个扇区的伺服信息，以便只能以最小量的伺服信息执行磁头定位。 在空闲状态下不需要的写入或读取系统和伺服系统的电路的电力从所选择的伺服信息的到达到下一个所选择的伺服信息的到达被中断， 控制信号根据扇区的时序产生。 功耗可以减少对应于关闭不需要的电路的数量，加上用于位置控制的计算所需的量。
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公开(公告)号：US5901009A
公开(公告)日：1999-05-04
申请号：US455806
申请日：1995-05-31
IPC分类号： G11B5/55
CPC分类号： G11B5/5547
摘要： A disk drive with reduced seek acoustic noise and a method for implementation, without any additional hardware or mechanical modifications to the actuator includes a filter such that servo-loop stability is unaffected. The filter is inserted outside the existing servo loop to reshape the existing velocity profile in real time and to facilitate the suppression of forcing components that produce seek acoustics. A weighting factor may be used to provide a weighted average of the filtered and unfiltered velocity reference signal to the servo loop so that at the end of a track seek operation, the unfiltered reference signal is applied to the velocity servo, and there is almost no change in settle-out performance when the target track is reached. It is not necessary to store large volumes of velocity profile data to deal with different seek lengths.
摘要翻译： 具有减小的寻呼声噪声的磁盘驱动器和实现方法，而没有对致动器的任何额外的硬件或机械修改包括使得伺服环路稳定性不受影响的滤波器。 滤波器被插入到现有的伺服环路外部，以实时重新形成现有的速度分布图，并有助于抑制产生寻道声学的强制元件。 可以使用加权因子来提供经滤波和未滤波的速度参考信号到伺服环路的加权平均值，使得在轨道搜索操作结束时，未过滤的参考信号被施加到速度伺服机构，并且几乎没有 当达到目标轨道时，改变稳定性能。 不需要存储大量的速度曲线数据来处理不同的寻道长度。
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