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1. 发明授权

US07440214B1 Disk drive and method having cost-effective storage of the disk drive's internal program code 有权
标题翻译：磁盘驱动器和方法具有高性价比的存储磁盘驱动器的内部程序代码
公开(公告)号：US07440214B1
公开(公告)日：2008-10-21
申请号：US10427484
申请日：2003-04-30
申请人： Travis E. Ell , Hanan Kupferman , Hoa V. Le , Jonathan V. Nguyen , Saied Tamaddon-Dallal , Virat Thantrakul , Teik Ee Yeo
发明人： Travis E. Ell , Hanan Kupferman , Hoa V. Le , Jonathan V. Nguyen , Saied Tamaddon-Dallal , Virat Thantrakul , Teik Ee Yeo
IPC分类号： G11B15/18
CPC分类号： G11B5/5965
摘要： Disclosed is a disk drive having a disk, a masked read-only memory (ROM) device, a reprogrammable nonvolatile memory device, and a microprocessor for executing program code. The disk has a magnetic data storage surface with embedded servo wedges for defining data storage tracks including reserve tracks. The masked ROM device stores program code for implementing a spindle motor controller, program code for implementing a portion of a servo controller for track following along a data storage track, and program code for implementing a portion of a disk controller for controlling writing disk data to and reading disk data from the reserve tracks. The reprogrammable nonvolatile memory device stores data parameters relating to the disk drive's configuration. The reserve tracks store program code for implementing a cache control system for controlling caching of disk data in a cache memory.
摘要翻译：公开了一种具有盘的磁盘驱动器，掩蔽的只读存储器（ROM）器件，可再编程的非易失性存储器件以及用于执行程序代码的微处理器。磁盘具有带有嵌入式伺服楔的磁数据存储表面，用于定义包括备用轨道的数据存储轨迹。被屏蔽的ROM设备存储用于实现主轴电动机控制器的程序代码，用于实现沿着数据存储轨道跟踪的伺服控制器的一部分的程序代码，以及用于实现用于控制将盘数据写入的盘控制器的一部分的程序代码并从备用磁道读取磁盘数据。可编程非易失性存储器件存储与磁盘驱动器配置相关的数据参数。储备跟踪存储程序代码，用于实现用于控制高速缓冲存储器中的磁盘数据的高速缓存的高速缓存控制系统。

2. 发明授权

US06490118B1 Adaptive h-infinity hardware controller for disc drive actuator control 失效
标题翻译：适用于磁盘驱动器执行器控制的h-infinity硬件控制器
公开(公告)号：US06490118B1
公开(公告)日：2002-12-03
申请号：US09557630
申请日：2000-04-21
申请人： Travis E. Ell , Virat Thantrakul
发明人： Travis E. Ell , Virat Thantrakul
IPC分类号： G11B5596
CPC分类号： G11B5/596 , G11B5/5552
摘要： Apparatus and method for generating control inputs for a disc drive dual stage actuator having primary and secondary actuator motors used to maintain a head adjacent a rotatable disc surface. An h-infinity hardware controller generates the control inputs in relation to an actual position signal, a desired position signal and a unique set of coefficients for each selected head. The coefficients are selected by obtaining an output response for each head, selecting the coefficients in relation to the output response for each head, and storing the coefficients in a nonvolatile memory location of the disc drive. The appropriate set of coefficients are thereafter loaded as each head is selected in turn during normal drive operation.
摘要翻译：用于产生用于盘驱动双级致动器的控制输入的装置和方法，其具有用于将头部保持在可旋转盘表面附近的主和辅助致动器马达。无限远硬件控制器产生与实际位置信号，期望位置信号和每个所选择的头部的唯一的一系列系数相关的控制输入。通过获得每个头的输出响应来选择系数，选择关于每个头的输出响应的系数，并将系数存储在盘驱动器的非易失性存储器位置中。随后在正常驱动操作期间依次选择每个头部，加载适当的系数集合。

3. 发明授权

US06604121B1 Digital division device and method using a reduced-sized lookup table 失效
标题翻译：数字分割装置和方法使用缩小的查找表
公开(公告)号：US06604121B1
公开(公告)日：2003-08-05
申请号：US09451695
申请日：1999-11-30
申请人： Travis E. Ell , John C. Morris
发明人： Travis E. Ell , John C. Morris
IPC分类号： G06F752
CPC分类号： G06F7/535 , G06F2207/5356 , G11B5/59633
摘要： Devices and methods are provided for estimating a high-precision quotient using a smaller-than-conventional lookup table. The devices include a numerator register feeding a numerator value (as a succession of bits or words) into a forward signal path. The forward path includes a partial quotient generator, an accumulator, and a latch. The devices further include a feedback signal path emerging from the latch output, undergoing division by bit-shifting, and terminating as an input to the accumulator. A multiple divide implementation for use in a particular servo control system is also presented.
摘要翻译：提供了用于使用小于常规查找表来估计高精度商的装置和方法。这些装置包括一个分子寄存器，其将分子值（作为一连串的位或字）馈送到前向信号路径中。前向路径包括部分商发生器，累加器和锁存器。这些装置还包括从锁存器输出出现的反馈信号路径，经由位移移位并被终止为累加器的输入。还提出了用于特定伺服控制系统的多分割实现。

4. 发明授权

US06590734B1 Observer based dual stage servo controller with gain boost to accomodate rotational vibration 有权
标题翻译：基于观察员的双级伺服控制器具有增益提升以适应旋转振动
公开(公告)号：US06590734B1
公开(公告)日：2003-07-08
申请号：US09645420
申请日：2000-08-24
申请人： Travis E. Ell
发明人： Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B21/10 , G11B5/5552 , G11B21/083
摘要： The present invention includes a servo control system for controlling a dual stage actuator in a disc drive. The disc drive includes a data head for accessing information on a disc surface, and the dual stage actuator includes a coarse actuator and at least one fine actuator. The control system includes a fine actuator driver and a coarse actuator driver for driving the fine and coarse actuators, respectively. The control system also includes an observer which receives the coarse and fine actuator input signals and estimates a response of the coarse and fine actuators. A gain boost circuit is coupled to the fine and coarse actuator drivers and introduces a gain boost to reduce track following error in a desired frequency range.
摘要翻译：本发明包括用于控制盘驱动器中的双级致动器的伺服控制系统。磁盘驱动器包括用于访问盘表面上的信息的数据头，并且双级致动器包括粗略致动器和至少一个精细致动器。控制系统包括分别用于驱动精细和粗略致动器的精细致动器驱动器和粗略致动器驱动器。控制系统还包括观察器，其接收粗细和致动器输入信号并估计粗细和致动器的响应。增益升压电路耦合到精细和粗略的致动器驱动器，并引入增益升高以减少期望频率范围内的跟踪误差。

5. 发明授权

US06958881B1 Disk drive control system having a servo processing accelerator circuit 失效
标题翻译：具有伺服处理加速器电路的磁盘驱动控制系统
公开(公告)号：US06958881B1
公开(公告)日：2005-10-25
申请号：US10724407
申请日：2003-11-26
申请人： Raffi Codilian , Travis E. Ell
发明人： Raffi Codilian , Travis E. Ell
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/5534
摘要： Disclosed is a control system for processing sampled servo data in a disk drive. The control system includes a microprocessor and a servo processing accelerator circuit for performing operations on the sampled servo data while the microprocessor is executing firmware code. The accelerator circuit supports the use of a higher servo bandwidth thus allowing a higher track density resulting a greater storage capacity for the disk drive. Also, the accelerator circuit relieves the microprocessor of the ordinary servo processing function. Thus, the microprocessor's limited processing capacity to be directed to other controller and interface functions of the disk drive. Only under unusual conditions, such as a write-unsafe (WUS) limit exception, does the microprocessor need to direct processing capacity to the servo processing function. Further, the accelerator circuit may be a decreased response time after reading the servo data from the disk.
摘要翻译：公开了一种用于在盘驱动器中处理采样的伺服数据的控制系统。控制系统包括微处理器和伺服处理加速器电路，用于在微处理器执行固件代码时对采样的伺服数据执行操作。加速器电路支持使用更高的伺服带宽，从而允许更高的磁道密度，从而为磁盘驱动器提供更大的存储容量。此外，加速器电路可以消除微处理器的普通伺服处理功能。因此，微处理器的有限处理能力被指向其他控制器和磁盘驱动器的接口功能。只有在异常情况下，如写入不安全（WUS）极限异常，微处理器才需要将处理能力引导到伺服处理功能。此外，加速器电路可以是从盘读取伺服数据后的响应时间减少。

6. 发明授权

US06674605B1 PQ enhanced dual stage servo controller 失效
标题翻译： PQ增强型双级伺服控制器
公开(公告)号：US06674605B1
公开(公告)日：2004-01-06
申请号：US09553365
申请日：2000-04-20
申请人： Travis E. Ell
发明人： Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B5/5552 , G11B21/083 , G11B21/10
摘要： A servo controller controls the servo system in a disc drive. A proportional integrator component receives the target track signal indicative of a target track and a measured track signal indicative of actual or measured data head position. During seek mode, the proportional integrator provides an output signal based on the measured track signal and the target track signal. A profile generator component provides a profile signal based on the output signal from the proportional integrator. A coarse actuator is driven based on the profile signal. A filter component is coupled to the profile generator and filters the profile signal to provide a filtered profile signal. The fine actuator is driven based on the filtered profile signal.
摘要翻译：伺服控制器控制磁盘驱动器中的伺服系统。比例积分器分量接收指示目标轨道的目标轨道信号和指示实际或测量数据头位置的测量轨迹信号。在寻道模式期间，比例积分器基于所测量的轨道信号和目标轨道信号提供输出信号。配置文件生成器组件基于比例积分器的输出信号提供配置文件信号。基于轮廓信号驱动粗略的致动器。滤波器组件耦合到简档生成器并对该简档信号进行滤波以提供滤波后的分布信号。基于滤波的轮廓信号驱动精细致动器。

7. 发明授权

US06671121B1 Minimizing milli-actuator reactive impulse and excessive power current 有权
标题翻译：最大限度地减小执行器无功脉冲和过大的功率电流
公开(公告)号：US06671121B1
公开(公告)日：2003-12-30
申请号：US09644410
申请日：2000-08-23
申请人： Robert T. Bradbury , Travis E. Ell
发明人： Robert T. Bradbury , Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B5/54 , G11B21/12
摘要： An information handling system, such as a disc drive, includes a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base, with multiple movable mill-actuator arms mounted on one portion of the actuator assembly. Attached to an end of the actuator is a voice coil which forms a portion of a voice coil motor. Magnets attached to the base form the other portion of the voice coil motor. A current driver for the voice coil delivers an amount of current to the voice coil to move the actuator assembly. Attached to another end of the actuator assembly is one or more transducers. In order to minimize the disturbance of a seeking milli-actuator, the operation to be executed is to cause the first milli-actuator to return slowly to its rest or zero position. A rate of return control circuit is implemented to drive a milli-actuator such that a milli-actuator at a non-zero or non-rest position will be returned to a rest position at a rate slower than a seeking milli-actuator.
摘要翻译：诸如盘驱动器的信息处理系统包括基座，可旋转地附接到基座的盘叠和可移动地附接到基座的致动器组件，多个可动铣刀致动器臂安装在致动器组件的一部分上。连接到致动器的端部的是形成音圈电动机的一部分的音圈。连接到基座的磁铁形成音圈电机的另一部分。用于音圈的电流驱动器向音圈传送一定量的电流以移动致动器组件。连接到致动器组件的另一端是一个或多个换能器。为了最小化搜索毫秒致动器的干扰，要执行的操作是使第一毫微致动器缓慢返回到其静止或零位置。执行返回率控制电路以驱动毫致动器，使得处于非零或非静止位置的毫激动器将以比搜索微致动器慢的速率返回到静止位置。

8. 发明授权

US06563665B1 PQ enhanced observer based dual stage servo controller 有权
标题翻译： PQ增强型观察者双级伺服控制器
公开(公告)号：US06563665B1
公开(公告)日：2003-05-13
申请号：US09620778
申请日：2000-07-21
申请人： Travis E. Ell
发明人： Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B5/5552 , G11B21/083 , G11B21/10
摘要： The present invention includes a servo control system for controlling a dual stage actuator in a disc drive. The disc drive includes a data head for accessing information on a disc surface, and the dual stage actuator includes a coarse actuator and at least one fine actuator. The control system includes a fine actuator driver and a coarse actuator driver for driving the fine and coarse actuators, respectively. The control system also includes an observer which receives the coarse and fine actuator input signals and estimates a response of the coarse and fine actuators.
摘要翻译：本发明包括用于控制盘驱动器中的双级致动器的伺服控制系统。磁盘驱动器包括用于访问盘表面上的信息的数据头，并且双级致动器包括粗略致动器和至少一个精细致动器。控制系统包括分别用于驱动精细和粗略致动器的精细致动器驱动器和粗略致动器驱动器。控制系统还包括观察器，其接收粗细和致动器输入信号并估计粗细和致动器的响应。

9. 发明授权

US06493177B1 Microactuator assisted seek and hysteresis correction method and apparatus for a disk drive 失效
标题翻译：用于磁盘驱动器的微致动器辅助寻找和滞后校正方法和装置
公开(公告)号：US06493177B1
公开(公告)日：2002-12-10
申请号：US09697960
申请日：2000-10-27
申请人： Travis E. Ell , Arnold G. Slezak
发明人： Travis E. Ell , Arnold G. Slezak
IPC分类号： G11B5596
CPC分类号： G11B21/025 , G11B5/5552 , G11B21/083 , G11B21/21
摘要： Apparatus and method for positioning a head in a disc drive using a dual stage actuator having a primary actuator motor for coarse head positional control and a microactuator motor for fine head positional control. The microactuator motor includes a strain gauge affixed to a piezoelectric transducer measuring actual dimensional change of the microactuator motor resulting from response by the piezoelectric transducer to a request for head repositioning. A closed loop servo control circuit generates control inputs for the dual stage actuator to carry out track following and seek operations while adjusting head position by correcting piezoelectric transducer hysteresis and reducing seek and settle times.
摘要翻译：使用具有用于粗头位置控制的主执行器电动机和用于精细位置控制的微致动器电动机的双级致动器来将磁头定位在磁盘驱动器中的装置和方法。该微型致动器马达包括一个应变计，该应变计固定在压电传感器上，该压电换能器测量由压电换能器响应于头部重新定位的请求而产生的微致动器马达的实际尺寸变化。闭环伺服控制电路通过校正压电传感器滞后并减少寻道和沉降时间，在调整磁头位置的同时，为双级致动器产生控制输入，以执行跟踪跟踪和寻道操作。

10. 发明授权

US06490121B1 Accelerated servo control calculations method and apparatus for a disc drive 失效
标题翻译：用于磁盘驱动器的加速伺服控制计算方法和装置
公开(公告)号：US06490121B1
公开(公告)日：2002-12-03
申请号：US09698914
申请日：2000-10-27
申请人： David C. Pruett , Travis E. Ell
发明人： David C. Pruett , Travis E. Ell
IPC分类号： G11B5596
CPC分类号： G11B5/59616 , G11B5/5547 , G11B21/083 , G11B21/106
摘要： Apparatus and method which provide accelerated servo control value calculations for a control processor controlling an actuator maintaining a head adjacent a rotatable disc f a disc drive. A dedicated multiply-accumulate hardware core of a servo micro engine calculates sum-of-products terms common in servo control loops. The multiply-accumulate hardware core uses a pipeline with stages for fetch, read, multiply, accumulate, and write-back as an arithmetic core to fully utilize all of the hardware during every servo interval. Feeding this arithmetic core is a dedicated state memory, from which a first signed servo state and a second signed servo state are read and where calculation results may be optionally written. Another, independent, coefficient memory provides predetermined coefficients used in resolving servo control loop algorithms. A final dedicated instruction memory provides shifter control values and the addresses of the states and coefficients.
摘要翻译：为控制处理器提供加速的伺服控制值计算的装置和方法，所述控制处理器控制致动器，所述致动器保持与盘驱动器的可旋转盘相邻的头伺服微型引擎的专用乘法累加硬件核心计算伺服控制回路中共同的乘积项。乘法累加硬件核心使用具有取出，读取，乘法，累加和回写作为算术核心的级别的流水线，以在每个伺服间隔期间充分利用所有硬件。馈送该算术核心是专用状态存储器，从其读取第一有符号伺服状态和第二有符号伺服状态，并且可选地写入计算结果。另一个独立的系数存储器提供用于解析伺服控制环路算法的预定系数。最终的专用指令存储器提供移位器控制值和状态和系数的地址。

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