公开(公告)号：WO1998027546A1

公开(公告)日：1998-06-25

申请号：PCT/US1997007352

申请日：1997-05-01

Applicant: SEAGATE TECHNOLOGY, INC. ,  FARD, Anoush, M. ,  MOHAJERANI, Khosrow ,  SAMPIETRO, Joseph, M. ,  BARINA, Jeffrey, G. ,  HAWWA, Muhammad, A.

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/55

CPC classification number: G11B5/5552 ,  G11B5/4873 ,  G11B21/08 ,  G11B21/106

Abstract: A system for positioning a transducing head of a disc drive over a selected track (42) of a rotatable disc (40) includes an actuator assembly (20, 50) having an E-block body (25) including a cavity (37), at least one actuator arm (30) extending from the E-block body (25), a head suspension mechanism (34, 36, 38) including the transducing head connected to an end of the actuator arm (30), and a pivot cartridge (26) in the cavity (37) in the E-block body (25). The E-block body (25) is attached to the pivot cartridge (26) and forms a hinge point (39) between the E-block body (25) and the pivot cartridge (26). A low resolution motor (22) rotates the actuator assembly (20, 50) about an axis (24) to effect coarse positioning of the head with respect to the selected track (42) of the rotatable disc (40). A piezoelectric element (27, 52) in the E-block body (25) is selectively expanded and contracted to distort the E-block body (25) around the hinge point (39) to effect fine positioning of the head with respect to the selected track (42) of the rotatable disc (40).

Abstract translation: 用于将盘驱动器的换能头定位在可旋转盘（40）的选定轨道（42）上的系统包括具有包括空腔（37）的E形块体（25）的致动器组件（20,50） 从所述E形块主体（25）延伸的至少一个致动器臂（30），包括连接到所述致动器臂（30）的端部的所述换能头的头部悬挂机构（34,36,38） （26）在E块体（25）中的空腔（37）中。 E块体（25）连接到枢轴筒（26）上，并在E块体（25）和枢轴筒（26）之间形成铰链点（39）。 低分辨率马达（22）围绕轴线（24）旋转致动器组件（20,50），以实现头部相对于可旋转盘（40）的选定轨道（42）的粗略定位。 E块体（25）中的压电元件（27,52）选择性地膨胀和收缩，以使铰链点（39）周围的E形块体（25）变形，以使头部相对于 所述可旋转盘（40）的所选轨道（42）。

公开(公告)号：WO1998020486A1

公开(公告)日：1998-05-14

申请号：PCT/US1997007892

申请日：1997-05-12

Applicant: SEAGATE TECHNOLOGY, INC. ,  MOHAJERANI, Khosrow ,  SAMPIETRO, Joseph, M. ,  FARD, Anoush, M. ,  BARINA, Jeffrey, G. ,  HAWWA, Muhammad, A. ,  VOLZ, LeRoy, A. ,  LE, Tien, Q. ,  VIGIL, Daniel, R.

Inventor： SEAGATE TECHNOLOGY, INC.

IPC: G11B05/55

CPC classification number: G11B5/54 ,  G11B5/4873 ,  G11B5/5552 ,  G11B21/085 ,  G11B21/24 ,  Y10T29/49025

Abstract: A system for positioning a transducing head in a disc drive device (10) over a selected track of a rotatable disc (30) includes an actuator arm (16) which is rotatable about an axis (14), a head suspension mechanism (18) connected to the actuator arm (16), and a slider (24) carrying a transducing head and supported by the head suspension mechanism (18). A low resolution motor (12) moves the actuator arm (16) about the axis (14) to effect coarse movement of the head between tracks of the disc (30). A piezoelectric element (26) is embedded in the actuator arm (16) to distort the arm to effect fine positioning of the head. Control circuitry (50, 52, 54, 58) distributes electrical signals to the low resolution motor (12, 60) and the piezoelectric element (26, 56) to selectively control movement thereof. The piezoelectric element (26) is embedded in the actuator arm (16) by removing a predetermined amount of material from the actuator arm (16) and bonding the piezoelectric element (26) in the resulting space in the actuator arm (16).

Abstract translation: 用于将转换头定位在可旋转盘（30）的选定轨道上的盘驱动装置（10）中的系统包括可围绕轴线（14）旋转的致动器臂（16），头悬挂机构（18） 连接到致动器臂（16），以及滑动器（24），其承载有传感头并由头部悬挂机构（18）支撑。 低分辨率马达（12）围绕轴线（14）移动致动器臂（16），以使头部在盘（30）的轨迹之间进行粗略移动。 压电元件（26）嵌入致动器臂（16）中以使臂扭曲以实现头部的精细定位。 控制电路（50,52,54,58）将电信号分配给低分辨率电动机（12,60）和压电元件（26,56）以选择性地控制其运动。 通过从致动器臂（16）中除去预定量的材料并将压电元件（26）接合到致动器臂（16）中的所得空间中，将压电元件（26）嵌入在致动器臂（16）中。

公开(公告)号：WO1997005604A1

公开(公告)日：1997-02-13

申请号：PCT/IB1996000925

申请日：1996-07-23

Applicant: CIRRUS LOGIC, INC.

Inventor： CIRRUS LOGIC, INC. ,  SUPINO, Louis

IPC: G11B05/55

CPC classification number: G11B5/59622 ,  G11B5/5547

Abstract: A sliding mode controller for controlling a read/write head actuator in a magnetic disk drive storage system wherein a voice coil motor connected to the actuator operates to adjust the position of the read/write head over a selected data track recorded on a magnetic medium. The sliding mode controller comprises an improved technique for reducing chatter associated with the inherent operation of such a controller i.e. rapid switching between gains to force the observable phase states to follow a predetermined phase state trajectory. The sliding mode controller generates a motor control command by multiplying an actuator position error and an actuator position error velocity by respective switching gains. The gains are switched according to a predetermiend relationship sigma between the phase states and a phase state trajectory. In order to reduce the switching frequency (i.e., chatter), a boundary layer around the phase state trajectory results in hysteresis, causing the gain blocks to switch only after the phase states cross over the boundary line. Further chatter reduction is achieved by generating the motor control signal proportional to an integral of sgn ( sigma ). The cost of the slidiing mode controller is reduced by implementing the phase state trajectory sigma as a lookup table indexed by a single phase state.

Abstract translation: 一种用于控制磁盘驱动器存储系统中的读/写磁头致动器的滑动模式控制器，其中连接到致动器的音圈电机用于调节读/写磁头在记录在磁介质上的所选数据磁道上的位置。 滑动模式控制器包括用于减少与这种控制器的固有操作相关联的颤动的改进技术，即在增益之间的快速切换以迫使可观察相位状态遵循预定的相位状态轨迹。 滑动模式控制器通过将致动器位置误差和致动器位置误差速度乘以相应的开关增益来产生电动机控制命令。 根据相位状态和相位状态轨迹之间的预定关系σ来切换增益。 为了降低开关频率（即颤振），相位状态轨迹周围的边界层会产生迟滞，导致增益块仅在相位状态越过边界线之后才切换。 通过产生与sgn（sigma）的积分成比例的电动机控制信号来实现进一步的颤振减小。 通过将相位状态轨迹sigma作为由单相状态索引的查找表来实现滑动模式控制器的成本。

公开(公告)号：WO1996027875A1

公开(公告)日：1996-09-12

申请号：PCT/US1996003272

申请日：1996-03-06

Applicant: CIRRUS LOGIC, INC.

Inventor： CIRRUS LOGIC, INC. ,  SUPINO, Louis ,  ROMANO, Paul, M.

IPC: G11B05/55

CPC classification number: G11B5/59683 ,  G11B5/5547 ,  G11B2005/0016

Abstract: A sliding mode controller for controlling the motion of a read/write head actuated by a voice coil motor over a rotating magnetic disk storage medium. The magnetic disk comprises a plurality of concentric data tracks recorded thereon wherein each data track comprises user data and servo data. The sliding mode controller operates by multiplying a head position error phase state and a head position error velocity phase state by respective switching gains to force the phase states to follow a predetermined phase state trajectory. The phase state trajectory can be defined by a single linear segment, a variable linear segment, multiple linear segments over the entire region of excursion, or optimum parabolic acceleration and deceleration segments. Switching logic, responsive to the phase states and a trajectory segment value sigma , switches between positive and negative feedback gains to drive the phase states toward a current trajectory segment. A sigma processing block monitors the phase states to determine when to switch from a current trajectory segment to the next trajectory segment. The resulting servo control system is relatively inexpensive to implement in either software or hardware, and it is substantially insensitive to parametric changes and external load disturbances. Further, it does not require notch filters commonly used in conventional linear controllers to compensate for mechanical resonances.

Abstract translation: 一种滑动模式控制器，用于控制由音圈电动机在旋转磁盘存储介质上驱动的读/写头的运动。 磁盘包括记录在其上的多个同心数据磁道，其中每个数据磁道包括用户数据和伺服数据。 滑动模式控制器通过将磁头位置误差相位状态和磁头位置误差速度相位状态乘以相应的开关增益来操作，以迫使相位状态遵循预定的相位状态轨迹。 相位状态轨迹可以由单个线性段，可变线性段，整个移动区域上的多个线性段或最佳抛物线加速和减速段来定义。 开关逻辑响应于相位状态和轨迹段sigma，在正和负反馈增益之间切换以将相位状态驱动到当前轨迹段。 西格玛处理块监视相位状态以确定何时从当前轨迹段切换到下一个轨迹段。 所得到的伺服控制系统在软件或硬件中实现相对便宜，并且对参数变化和外部负载干扰基本上不敏感。 此外，它不需要常规线性控制器中通常使用的陷波滤波器来补偿机械谐振。

公开(公告)号：WO1994017522A1

公开(公告)日：1994-08-04

申请号：PCT/US1993010342

申请日：1993-10-28

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  WANG, Vivian, H. ,  BASEHORE, David, W. ,  MORRIS, Frank, I.

IPC: G11B05/55

CPC classification number: G11B5/5521

Abstract: In a rigid disk drive having a circular disk (203) for storing digital data in a plurality of tracks, a transducer (202) for reading and writing the digital data from and to the disk (203), an actuator (201) coupled to the transducer (202) for positioning the transducer (202) from one track to another track according to a servomechanism. The actuator (201) is comprised of a stationary magnet which emanates a magnetic flux. A movable wire coil (204) is placed within this magnetic flux. When an electrical current is fed through the wire, a torque is produced which causes the actuator (201) carrying the transducer (202) to be moved. The wire comprising the coil (204) has a substantially square cross section for minimizing the resistance of the coil (204).

Abstract translation: 在具有用于在多个轨道中存储数字数据的圆盘（203）的刚性盘驱动器中，用于从盘（203）读取和写入数字数据的换能器（202），耦合到 用于根据伺服机构将换能器（202）从一个轨道定位到另一个轨道的换能器（202）。 致动器（201）由发出磁通量的固定磁体组成。 可动线圈（204）被放置在该磁通量内。 当通过导线馈送电流时，产生使得承载换能器（202）的致动器（201）被移动的扭矩。 包括线圈（204）的线具有基本正方形的横截面，用于使线圈（204）的电阻最小化。

公开(公告)号：WO1992010833A1

公开(公告)日：1992-06-25

申请号：PCT/US1991009097

申请日：1991-12-04

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  CHESSMAN, Shirley, M. ,  WILLIAMS, Sigmund

IPC: G11B05/55

CPC classification number: G11B5/5521

Abstract: A bobbin (25) for supporting an actuator coil (26) mounted to a head support apparatus (5) for use in a magnetic disk (12) memory device including a non-uniform outer peripheral surface (28) upon which the actuator coil is wound around and supported thereby.

Abstract translation: 一种用于支撑安装在磁头支撑装置（5）上用于磁盘（12）存储装置的致动器线圈（26）的线轴（25），该磁盘（12）存储装置包括不均匀的外周面（28），致动器线圈 缠绕并由此支撑。

公开(公告)号：WO1990001767A1

公开(公告)日：1990-02-22

申请号：PCT/US1989003270

申请日：1989-07-28

Applicant: MICROSCIENCE INTERNATIONAL INC.

Inventor： MICROSCIENCE INTERNATIONAL INC. ,  LEE, Edward ,  SUN, Kai, C., K.

IPC: G11B05/55

CPC classification number: G11B21/22

Abstract: The present invention provides a magnet (38) positioned to attract and hold a portion (26) of a head arm in a disk drive assembly. The magnet is mounted by a resilient mechanism (28) to a support structure so that there is some overtravel when the head arm assembly contacts the magnet, to dampen the impact and prevent the head arm from bouncing away and maintain contact when the disk drive housing receives an external shock.

Abstract translation: 本发明提供一种定位成吸引和保持磁头驱动组件中的头臂的一部分（26）的磁体（38）。 磁体通过弹性机构（28）安装到支撑结构上，使得当磁头臂组件接触磁体时，存在一些超程，以便抑制冲击并防止磁头臂反弹并且当磁盘驱动器壳体 受到外部冲击。

公开(公告)号：WO1987002498A1

公开(公告)日：1987-04-23

申请号：PCT/US1986002201

申请日：1986-10-16

Applicant: HEWLETT-PACKARD COMPANY

Inventor： HEWLETT-PACKARD COMPANY ,  SLEGER, Roger, R.

IPC: G11B05/55

CPC classification number: G11B5/5521 ,  G11B5/58

Abstract: In order to improve servo system stability and decrease settling times in rotary head positioners for high performance magnetic disk drives, a floating mass damper (46) is mounted on the end of an accessing head arm structure (22-27) of the positioner opposite to the end or ends carrying the magnetic head or heads. The damper includes a spring centered floating mass (54) which rests on aviscous film (66), such as silicone oil, and the shear forces developed by motion of the floating mass across the film dissipates vibrational mode energy in the accessing head arm structure during both a fast seek operation followed by track following fine servo operation. Such energy dissipation thus reduces the settling time and amplitude of natural resonance of the head positioner.

Abstract translation: 为了提高伺服系统的稳定性并减少用于高性能磁盘驱动器的旋转磁头定位器的稳定时间，浮动质量阻尼器（46）安装在定位器相对的定位头臂结构（22-27）的端部 端头或端部带有磁头或磁头。 阻尼器包括一个弹簧定位的浮动质量块（54），其位于诸如硅油的悬垂薄膜（66）上，并且通过浮动块体穿过薄膜的运动产生的剪切力消除了进入头臂结构中的振动模式能量 无论是快速寻道操作还是跟随精细伺服操作。 这样的能量耗散因此降低了头部定位器的自然共振的稳定时间和振幅。

公开(公告)号：WO1981000781A1

公开(公告)日：1981-03-19

申请号：PCT/US1980001077

申请日：1980-08-21

Applicant: MINNESOTA MINING & MFG CO

Inventor： MINNESOTA MINING & MFG CO ,  ZARR M

IPC: G11B05/55

CPC classification number: G11B5/5504

Abstract: A head positioning mechanism for a multitrack data cartridge recorder (10) including a stepper motor lead screw (40) and screw follower assembly (42) for incrementally moving a record stroke playback head (28) transverse to the path of a magnetic recording tape to enable accurate positioning of the head (28) at any given track across the tape.

公开(公告)号：EP0267771A3

公开(公告)日：1988-11-30

申请号：EP87309902

申请日：1987-11-09

Applicant: SEAGATE TECHNOLOGY, INC.

Inventor： Jacques, James Oliver

IPC: G11B05/596 ,  G11B05/55

CPC classification number: G11B5/5547

Abstract: A system is disclosed wherein a plurality of discs (11) in a stack are accessed using a vertical head array including two servo heads (13), one located at or near each end of the disc stack. In order to exactly center any given data head over a desired data track location in the disc stack, the error distance of the given data head relative to the data track can be determined by combining propor­tions of the two servo head signals from the top and bottom servo heads (131), their proportions being based on the vertical distance of each of the servo heads from the given data head which is to be exactly centered over a data track. If the servo distance from the disc edge is represented by S1 and S2, and the vertical distances from the head to the center of the servo heads is represented by Y1, Y2 then the general formula for calculating the error correction for centering the typical data head is E c =1/Y1+Y2 × (S2Y1+S1Y2).