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公开(公告)号：EP2259262A2
公开(公告)日：2010-12-08
申请号：EP10182786.3
申请日：2004-04-15
申请人： Apple Inc.
CPC分类号： G11B33/08 , G11B5/5582 , G11B19/042 , G11B19/044
摘要： An improved media player and a method for operating a portable computing device (e.g., media player) are disclosed. According to one aspect, a portable computing device is able to protect its disk drive when being subjected to undesired levels of acceleration. The portable computing device protects its disk drive by monitoring for such accelerations and operating to avoid usage of the disk drive during periods of acceleration. Through such protection, the likelihood of damage to the disk drive or loss of data stored on the disk drive is able to be substantially reduced. According to another aspect, a user of a portable computing device can be alerted when the portable computing device is being subjected to undesirable levels of acceleration.
摘要翻译： 公开了一种改进的媒体播放器和用于操作便携式计算设备（例如，媒体播放器）的方法。 根据一个方面，便携式计算设备能够在受到不期望的加速度等级时保护其磁盘驱动器。 便携式计算设备通过监视这种加速度来保护其磁盘驱动器，并且在加速期间避免使用磁盘驱动器。 通过这样的保护，可以大大减少磁盘驱动器的损坏的可能性或磁盘驱动器上存储的数据的丢失。 根据另一方面，当便携式计算设备受到不期望的加速等级时，可以提醒便携式计算设备的用户。
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2.发明公开Head position control method, head position control device, and disk device 审中-公开头部位置控制方法，头部位置控制装置和磁盘装置
公开(公告)号：EP1739659A3
公开(公告)日：2008-04-02
申请号：EP06251204.1
申请日：2006-03-07
申请人： Fujitsu Ltd.
发明人： Takaishi, Kazuhiko
CPC分类号： G11B5/5582 , G11B5/59627 , G11B5/59688 , G11B7/08505 , G11B7/0941 , G11B7/0946 , G11B11/10563 , G11B21/085
摘要： A position control device corrects the displacement of the head by disturbance applied to the disk device by the control system. An adaptive control to an unknown disturbance frequency is performed. A frequency estimation block (24) for estimating the external vibration frequency from a signal that is based on the position error according to the adaptive rule, and a correction table(25) for sequentially correcting the constants of a compensator (23) using this external vibration frequency, are provided. Since the constantssupplied to the compensator (23) are sequentially corrected according to the estimated angular frequency, highly accurate follow up control to an external vibration frequency in a wide range becomes possible.
摘要翻译： 位置控制装置通过由控制系统施加到磁盘装置的干扰来校正磁头的位移。 对未知干扰频率进行自适应控制。 一种根据基于自适应规则的位置误差的信号来估计外部振动频率的频率估计块（24）以及一种使用该外部连续校正补偿器（23）的常数的校正表（25） 振动频率。 由于根据估计的角频率对提供给补偿器（23）的常数进行顺序校正，因此可以在宽范围内对外部振动频率进行高度准确的跟踪控制。
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公开(公告)号：EP0969465A4
公开(公告)日：2007-11-28
申请号：EP99900327
申请日：1999-01-18
CPC分类号： G11B5/553 , G11B5/5582
摘要： Recording track density is increased to provide large storage by improving positioning accuracy that is limited by the presence of the vibration mode of an actuator (3) for positioning a magnetic head (2). A data recording and reproducing apparatus comprises a magnetic disk (1), a magnetic head (2) movable relative to the magnetic disk (1) to record and reproduce data, an actuator (3) supporting the magnetic head (2) and movable in response to a command, and a controller (4) for controlling the movement of the actuator (3) by producing commands according to the signals read by the magnetic head (2). The actuator (3) has at least one mode of vibration in addition to the mode of rigid-body motion. The controller (4), composed of an internal model including at least one mode of vibration, comprises a state estimation section for estimating the state variables of the modes of vibration and rigid-body motion of the actuator (3) from the signals read by the magnetic head (2) and the controlled variables corresponding to the move command given to the actuator (3), and a generator section for generating controlled variables by using the estimated state variables output from the state estimation section.
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4.发明公开Head positioning control method, head positioning control device and disk apparatus 审中-公开SteuerverfahrenfürKopfposition，SteuervorrichtungfürKopfposition undPlattengerät
公开(公告)号：EP1840883A2
公开(公告)日：2007-10-03
申请号：EP06253743
申请日：2006-07-18
申请人： FUJITSU LTD
发明人： TAKAISHI KAZUHIKO
CPC分类号： G11B5/5582 , G11B5/596
摘要： A positioning control device (14) executes disturbance observer control having a disturbance suppression function, wherein changes of control characteristics are prevented even if the disturbance frequency (É) is suppressed. When a control value of an actuator (1) is computed using estimated gains of the actuator and estimated gains of disturbance according to an estimated position error (e[k]) by disturbance observer control including a model of the actuator and model of the disturbance, the disturbance frequency is estimated according to the estimated position error, and the estimated gains of the actuator and the estimated gains of the disturbance, corresponding to the disturbance frequency, are changed. Therefore appropriate observer control according to the disturbance frequency can be implemented.
摘要翻译： 定位控制装置（14）执行具有干扰抑制功能的干扰观测器控制，其中即使抑制了扰动频率（É）也防止了控制特性的改变。 当使用估计的致动器增益和估计的扰动增益根据估计的位置误差（e [k]）通过包括致动器的模型和扰动模型的扰动观察器控制来计算致动器（1）的控制值时 ，根据估计的位置误差来估计干扰频率，并且改变与扰动频率对应的致动器的估计增益和估计的扰动增益。 因此，可以实现根据干扰频率的适当的观察者控制。
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公开(公告)号：EP1784699A1
公开(公告)日：2007-05-16
申请号：EP05778113.0
申请日：2005-07-29
发明人： HANKS, D. Mitchel
CPC分类号： G05B5/01 , G05B2219/41117 , G05B2219/41337 , G11B5/5582 , G11B7/0946
摘要： A control circuit (98) creates a self-sensing active-damping voice coil (80). The control circuit includes a current sensor (84) coupled to a voice coil (90). A first filter (72) is coupled to the current sensor to create an error voltage (70) that is proportional to the integral of an external acceleration (44) applied to the voice coil. A second filter (74) with a lead-lag component is coupled to the error voltage to create a voltage (82) applied to the voice coil that substantially cancels the external acceleration below a pole defined by a lead-lag component thereby damping the external acceleration.
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公开(公告)号：EP1683141A1
公开(公告)日：2006-07-26
申请号：EP04770245.1
申请日：2004-10-13
CPC分类号： G11B21/106 , G11B5/5582 , G11B5/596 , G11B7/0941 , G11B7/0946 , G11B7/0948
摘要： A method is described for controlling an optical disc drive apparatus (1) of a type comprising: scanning means (30) for scanning a record track of an optical disc (2), said scanning means (30) comprising at least one read/write element (34) to be positioned with respect to the disc (2), and at least one optical detector (35) for generating a read signal (SR); actuator means (50) for controlling the positioning of said at least one read/write element (34); a control circuit (290) for receiving said read signal (SR) and generating at least one actuator control signal (SCR) on the basis of at least one signal component of said read signal (SR), the control circuit (290) having at least one variable gain (Ϝ); said control circuit (290), said actuator means (50), said read/write element (34), and said optical detector (35) defining a control loop (200) having a critical frequency (ωCP); the method comprises the steps of: selectively setting the gain (Ϝ), for signal components having a frequency in a predefined range corresponding to said critical frequency (ωCP), to a value lower than a value for signal components having a frequency outside said range.
摘要翻译： 描述了一种用于控制光盘驱动装置（1）的方法，该方法包括：用于扫描光盘（2）的记录道的扫描装置（30），所述扫描装置（30）包括至少一个读/写 元件（34）相对于盘（2）定位，以及至少一个光学检测器（35），用于产生读取信号（SR）; 致动器装置（50），用于控制所述至少一个读/写元件（34）的定位; 控制电路（290），用于接收所述读取信号（SR）并基于所述读取信号（SR）的至少一个信号分量产生至少一个致动器控制信号（SCR），所述控制电路（290）具有在 至少一个可变增益（Ϝ）; 所述控制电路（290），所述致动器装置（50），所述读/写元件（34）和所述光检测器（35）限定具有临界频率（ωCP）的控制环路（200）; 该方法包括以下步骤：对于具有对应于所述临界频率（ωCP）的预定义范围内的频率的信号分量，将增益（ε）选择性地设置为低于具有所述范围外的频率的信号分量的值 。
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公开(公告)号：EP1665239A1
公开(公告)日：2006-06-07
申请号：EP04769944.2
申请日：2004-09-06
发明人： COOLEN, Rob, J., M. , CREMERS, Franciscus, L., M. , LEENKNEGT, George, A., L. , HEERTJES, Marcel, F.
CPC分类号： G11B21/106 , G11B5/5582 , G11B7/0946 , G11B19/04
摘要： A method is described for detecting a mechanical shock in a disc drive apparatus (1) of a type comprising: scanning means (30) for scanning record tracks of a disc (2) and for generating a read signal (SR); actuator means (50) for controlling the positioning of at least one read/write element (34) of said scanning means; a control circuit (90) for receiving said read signal (SR), deriving at least one error signal (RE) from said read signal, and generating at least one actuator control signal (SCR) on the basis of said error signal. The method comprises the steps of: -determining a shock sensitivity function (SSHOCK) which describes the relationship between shocks (OExT) and said error signal; determining or at least approximating an inverse shock sensitivity function (S-1SHOCK) as the inverse of said shock sensitivity function (SSHOCK); - and applying said inverse shock sensitivity function (S1-SHOCK) on said error signal.
摘要翻译： 描述了一种用于检测磁盘驱动装置（1）中的机械冲击的方法，该装置包括：扫描装置（30），用于扫描磁盘（2）的记录磁道并用于产生读取信号（SR）; 致动器装置（50），用于控制所述扫描装置的至少一个读/写元件（34）的定位; 控制电路（90），用于接收所述读取信号（SR），从所述读取信号导出至少一个误差信号（RE），并且基于所述误差信号产生至少一个致动器控制信号（SCR）。 该方法包括以下步骤： - 确定描述冲击（OExT）与所述误差信号之间的关系的冲击敏感度函数（SSHOCK） 确定或至少近似作为所述震动敏感度函数（SSHOCK）的倒数的反冲击敏感度函数（S-1SHOCK）; - 对所述误差信号应用所述反冲击灵敏度函数（S1-SHOCK）。
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公开(公告)号：EP1482503A3
公开(公告)日：2006-04-12
申请号：EP04012374.7
申请日：2004-05-25
发明人： Inaji, Toshio , Miyata, Keizo , Kohso, Hiroshi , Umeda, Makoto
CPC分类号： G11B5/596 , G11B5/5582 , G11B21/106
摘要： A disk apparatus includes: an actuator 7 ; a driver 10 ; a voltage detector 11 for outputting first voltage signal Ed which is produced in a driving coil 5 of the actuator 7 ; a voltage signal adjuster 16 for outputting pseudo disturbance signal ur and generating second voltage signal Ed + from pseudo disturbance signal ur , driving signal u , first voltage signal Ed , and disturbance estimation signal τd est ; a disturbance estimator 12 for estimating the magnitude of disturbance load τ d applied to a magnetic head 2 from driving signal u and second voltage signal Ed + to output disturbance estimation signal τd est ; a position detector 13 for generating position error signal e which corresponds to a current position of the magnetic head 2 ; a position controller 14 for generating control signal c from position error signal e ; and a corrector 15 for generating driving signal u from disturbance estimation signal τd est and position control signal c .
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公开(公告)号：EP1639588A1
公开(公告)日：2006-03-29
申请号：EP04750246.3
申请日：2004-04-15
申请人： APPLE COMPUTER, INC.
CPC分类号： G11B33/08 , G11B5/5582 , G11B19/042 , G11B19/044
摘要： An improved media player and a method for operating a portable computing device (e.g., media player) are disclosed. According to one aspect, a portable computing device is able to protect its disk drive when being subjected to undesired levels of acceleration. The portable computing device protects its disk drive by monitoring for such accelerations and operating to avoid usage of the disk drive during periods of acceleration. Through such protection, the likelihood of damage to the disk drive or loss of data stored on the disk drive is able to be substantially reduced. According to another aspect, a user of a portable computing device can be alerted when the portable computing device is being subjected to undesirable levels of acceleration.
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10.发明公开Method and apparatus for controlling disc drive positioning arm using back-emf 有权用于在使用反电动势来控制磁盘驱动器的定位臂的方法和装置
公开(公告)号：EP1394799A3
公开(公告)日：2006-03-01
申请号：EP03019401.3
申请日：2003-08-27
发明人： Shin, Sang-chul
CPC分类号： G11B5/54 , G11B5/5582
摘要： A method and an apparatus for controlling a disc drive, and more particularly, to a method and an apparatus for controlling a disc drive using a counter-electromotive force, which prevents collision and malfunction of a transducer and a disc by determining external vibrations and the magnitude of a shock without installing an additional shock sensor in a disc drive, are provided. The method for controlling a disc drive using a counter-electromotive force comprises (a) detecting a voltage applied to a voice coil during a predetermined mode, (b) performing an operation of the value of the counter-electromotive force using the voice coil voltage detected in (a), (c) comparing the value of the counter-electromotive force operated in (b) with a predetermined threshold, and (d) when the value of the counter-electromotive force is equal to or larger than the predetermined threshold, controlling a voice coil motor and a spindle motor so that a current mode is stopped and a parking or unloading mode is executed.
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