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1. 发明申请

WO0135176A2 SERVO CONTROL APPARATUS AND METHOD USING ABSOLUTE VALUE INPUT SIGNALS 审中-公开
标题翻译：伺服控制装置和使用绝对值输入信号的方法
公开(公告)号：WO0135176A2
公开(公告)日：2001-05-17
申请号：PCT/US0030670
申请日：2000-11-07
申请人： ACORN TECH INC
发明人： IOANNOU PETROS A , KOSMATOPOULOS ELIAS B , DESPAIN ALVIN M
IPC分类号： G05B13/02 , G05B13/04 , G05B19/19 , G05B21/02 , G11B5/55 , G11B5/596 , G11B21/02 , G11B21/08
CPC分类号： G11B21/022 , G05B13/026 , G05B13/04 , G05B13/048 , G05B19/19 , G05B2219/41369 , G11B5/5521 , G11B5/596 , G11B21/081
摘要： A servo control apparatus and method controls systems at least partially on the basis of an observable variable that has an absolute value functional relationship with the controlled variable and does not change sign for positive and negative variations from a nominal value. When applied to the positional control of an object, the control system observes a value of a position error signal and maps that signal to two different potentially correct displacement values. Two estimators within the control system are initiated, one using the positive displacement and the other using the negative displacement, and the two estimators each predict the future position of the object and the corresponding position error signal for each estimated position. A new position error signal is detected and compared to the two estimated position error signals. After sufficient system evolution, the control system can select one or the other of the estimators as being correct and the associated displacement is identified as correct and is used for future positioning applications, preferably until the sign of the displacement of the head again becomes ambiguous. The control system can be used in combination with other control mechanisms including those using complimentary control information that provides more complete positioning information. The control method, system and apparatus find particularly advantageous application in magnetic storage hard disk drive systems.
摘要翻译：伺服控制装置和方法至少部分地基于与受控变量具有绝对值函数关系的可观察变量来控制系统，并且对于从标称值的正和负变化不改变符号。当应用于对象的位置控制时，控制系统观察位置误差信号的值，并将该信号映射到两个不同的潜在正确的位移值。启动控制系统内的两个估计器，一个使用正位移，另一个使用负位移，两个估计器各自预测对象的未来位置和每个估计位置的对应位置误差信号。检测到新的位置误差信号并将其与两个估计的位置误差信号进行比较。在足够的系统演进之后，控制系统可以选择一个或另一个估计器是正确的，相关的位移被识别为正确的，并且用于将来的定位应用，优选地直到头部位移的符号再次变得不明确。控制系统可以与其他控制机制结合使用，包括使用提供更完整的定位信息的互补控制信息的控制系统。控制方法，系统和装置在磁存储硬盘驱动系统中特别有利。

2. 发明申请

WO99019866A1 EXTENDED POSITION ERROR SIGNAL LINEARIZATION AND NORMALIZATION 审中-公开
标题翻译：扩展位置错误信号线性化和正规化
公开(公告)号：WO99019866A1
公开(公告)日：1999-04-22
申请号：PCT/US1998/014611
申请日：1998-07-14
IPC分类号： G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B21/081 , G11B5/59605 , G11B5/59611 , G11B5/59688 , G11B21/083
摘要： A method of producing a position error signal (334, 336) includes storing a normal position error value (282) generated from a normal servo field (402) and a quadrature position error value (286) generated from a quadrature servo field (404), where the normal servo field is ninety degrees out of phase from the quadrature servo field. A position error numerator (294, 298) is created by arithmetically combining the normal position error value (282) and the quadrature position error value (286). A position error denominator (306, 308) is created based on the normal position error value (282) and the quadrature position error value (286). The position error signal (334, 336) is produced by dividing the position error numerator (294, 298) by the position error denominator (306, 308).
摘要翻译：产生位置误差信号（334,336）的方法包括存储从正常伺服字段（402）生成的正常位置误差值（282）和从正交伺服字段（404）生成的正交位置误差值（286），其中正常伺服场与正交伺服场相差90度。通过算术组合正常位置误差值（282）和正交位置误差值（286）来创建位置误差分子（294,298）。基于正常位置误差值（282）和正交位置误差值（286）创建位置误差分母（306,308）。通过将位置误差分子（294,298）除以位置误差分母（306,308）来产生位置误差信号（334,336）。

3. 发明申请

WO99060567A1 ASYNCHRONOUS ANALOG DEMODULATOR AND METHOD FOR A NULL-TYPE SERVO PATTERN 审中-公开
标题翻译：异步模拟解调器和空型伺服模式的方法
公开(公告)号：WO99060567A1
公开(公告)日：1999-11-25
申请号：PCT/US1999/009326
申请日：1999-04-29
IPC分类号： G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B21/081 , G11B5/5552 , G11B5/59655
摘要： An asynchronous demodulator and method is provided which determines a position error of a read head (134) relative to a position on a medium (122) in a storage device (120). The read head generates a read signal (400) as the read head passes over a servo area (180) on the medium (122). The demodulator (300) generates a normal demodulating signal (414) that is asynchronous with the read signal (400) and a quadrature demodulating signal (412) that is ninety degrees out of phase with the normal demodulating signal (414). The read signal (400) is multiplied by the normal demodulating signal (414) and the quadrature demodulating signal (412) to produce a normal position signal and a quadrature position signal. The demodulator produces a position error magnitude and a position error direction based on the normal position signal and the quadrature position signal.
摘要翻译：提供了一种异步解调器和方法，其确定读取头（134）相对于存储设备（120）中的介质（122）上的位置的位置误差。当读取头通过介质（122）上的伺服区域（180）时，读取头产生读取信号（400）。解调器（300）产生与读取信号（400）异步的正常解调信号（414）和与正常解调信号（414）相差90度的正交解调信号（412）。读取信号（400）乘以正常解调信号（414）和正交解调信号（412），以产生正常位置信号和正交位置信号。解调器基于正常位置信号和正交位置信号产生位置误差幅度和位置误差方向。

4. 发明申请

WO99039345A1 DISK DRIVE SYSTEM HAVING HYBRID ANALOG/DIGITAL PULSE PEAK INSTANCE/AMPLITUDE DATA DETECTION CHANNELS 审中-公开
标题翻译：具有混合模拟/数字脉冲峰值稳定性/振幅数据检测通道的磁盘驱动系统
公开(公告)号：WO99039345A1
公开(公告)日：1999-08-05
申请号：PCT/US1999/002101
申请日：1999-02-01
IPC分类号： G11B7/005 , G11B7/007 , G11B7/09 , G11B11/10 , G11B11/105 , G11B20/10 , G11B21/08 , G11B7/00 , G11B21/00
CPC分类号： G11B20/10009 , G11B7/005 , G11B7/00745 , G11B7/09 , G11B11/10541 , G11B11/10565 , G11B21/081
摘要： In disk drives incorporating the present Peak Detection Channel invention (PDC) an important feature is the ability to locate the data on a disk. Servo timing sectors for each data track are recognized by the embodiments of the invention cooperating with system electronics at start up of the disk drive system. Variation of data pulse heights, widths and shapes over a broad range are accommodated. The invention takes advantage of the fact that typical pulse shapes (e.g. Gaussian or cosine-squared) can be closely approximated near their peak by a parabolic curve.
摘要翻译：在包含现有峰值检测通道发明（PDC）的磁盘驱动器中，重要的特征是能够将数据定位在磁盘上。在磁盘驱动器系统启动时，通过与系统电子设备协作的本发明的实施例，识别每个数据磁道的伺服定时扇区。适应宽范围内的数据脉冲高度，宽度和形状的变化。本发明利用以下事实：典型的脉冲形状（例如高斯或余弦平方）可以通过抛物线曲线在其峰值附近近似近似。

5. 发明申请

WO00010167A1 DETECTION OF PULSE PEAK INSTANCE AND AMPLITUDE IN A STORAGE DRIVE 审中-公开
标题翻译：在存储驱动器中检测脉冲峰值和振幅
公开(公告)号：WO00010167A1
公开(公告)日：2000-02-24
申请号：PCT/US1999/014506
申请日：1999-06-25
IPC分类号： G11B7/005 , G11B7/007 , G11B7/09 , G11B11/10 , G11B11/105 , G11B20/10 , G11B21/08 , G11B7/00 , G11B21/00
CPC分类号： G11B20/10037 , G11B7/005 , G11B7/00745 , G11B7/09 , G11B11/10541 , G11B11/10565 , G11B20/10009 , G11B21/081
摘要： A method of pre-processing sampled data prior to estimating the peak amplitude of a pulse includes averaging of two adjacent sample values. Pre-processing makes the peak amplitude estimation less sensitive to the sampling phase relative to the peak position and consequently allows for the use of a lower sampling period relative to the full-width-half-maximum pulse width for a given peak estimation accuracy. The method incorporates a step in which a base line offset signal is subtracted from an estimated peak value, and multiplying the consequent pulse peak amplitude estimate by a predetermined constant in order to compensate for a systematic change in a final peak amplitude estimate. The multiplying constant may have a value derived from estimated peak values of other detected pulses in order to compensate for a systematic change in the peak amplitude estimate. Offsets in a position error signal derived from such pulses are eliminated by subtracting the estimated peak amplitudes of a pair of proximate (spatially and temporally related) pulses. The difference of another pair of proximate pulses is used to estimate the maximum peak amplitude of each pulse. A position error signal difference is divided by a maximum peak amplitude difference to generate a normalized position error signal that compensates for systematic changes of pulse signal amplitude estimate caused by adjacent sample averaging.
摘要翻译：在估计脉冲的峰值幅度之前预处理采样数据的方法包括平均两个相邻采样值。预处理使得峰值幅度估计对于相对于峰值位置的采样相位不太敏感，因此允许对于给定的峰值估计精度使用相对于全宽半最大脉冲宽度的较低采样周期。该方法包括一个步骤，其中从估计的峰值中减去基线偏移信号，并将随后的脉冲峰值振幅估计乘以预定常数，以便补偿最终峰值幅度估计的系统变化。乘法常数可以具有从其他检测到的脉冲的估计峰值导出的值，以便补偿峰值幅度估计的系统变化。通过减去一对近似（空间和时间相关的）脉冲的估计峰值幅度来消除从这样的脉冲导出的位置误差信号中的偏移。使用另一对邻近脉冲对的差别来估计每个脉冲的最大峰值幅度。将位置误差信号差除以最大峰值振幅差以产生归一化位置误差信号，该归一化位置误差信号补偿由相邻采样平均引起的脉冲信号幅度估计的系统变化。

6. 发明申请

WO1999039346A1 DETECTION OF PULSE PEAK INSTANCE AND AMPLITUDE IN A STORAGE DRIVE 审中-公开
标题翻译：在存储驱动器中检测脉冲峰值和振幅
公开(公告)号：WO1999039346A1
公开(公告)日：1999-08-05
申请号：PCT/US1999002150
申请日：1999-02-01
申请人： SEAGATE TECHNOLOGY, INC.
发明人： SEAGATE TECHNOLOGY, INC. , BELSER, Karl, A.
IPC分类号： G11B20/10
CPC分类号： G11B20/10037 , G11B7/005 , G11B7/00745 , G11B7/09 , G11B11/10541 , G11B11/10565 , G11B20/10009 , G11B21/081
摘要： A method of pre-processing sampled data prior to estimating the peak amplitude of a pulse includes averaging of two adjacent sample values. Pre-processing makes the peak amplitude estimation less sensitive to the sampling phase relative to the peak position and consequently allows for the use of a lower sampling period relative to the full-width-half-maximum pulse width for a given peak estimation accuracy. The method incorporates a step in which a base line offset signal is subtracted from an estimated peak value, and multiplying the consequent pulse peak amplitude estimate by a predetermined constant in order to compensate for a systematic change in a final peak amplitude estimate. The multiplying constant may have a value derived from estimated peak values of other detected pulses in order to compensate for a systematic change in the peak amplitude estimate. Offsets in a position error signal derived from such pulses are eliminated by subtracting the estimated peak amplitudes of a pair of proximate (spatially and temporally related) pulses. The difference of another pair of proximate pulses is used to estimate the maximum peak amplitude of each pulse. A position error signal difference is divided by a maximum peak amplitude difference to generate a normalized position error signal that compensates for systematic changes of pulse signal amplitude estimate caused by adjacent sample averaging.
摘要翻译：在估计脉冲的峰值幅度之前预处理采样数据的方法包括平均两个相邻采样值。预处理使得峰值幅度估计对于相对于峰值位置的采样相位不太敏感，因此允许对于给定的峰值估计精度使用相对于全宽半最大脉冲宽度的较低采样周期。该方法包括一个步骤，其中从估计的峰值中减去基线偏移信号，并将随后的脉冲峰值振幅估计乘以预定常数，以便补偿最终峰值幅度估计的系统变化。乘法常数可以具有从其他检测到的脉冲的估计峰值导出的值，以便补偿峰值幅度估计的系统变化。通过减去一对近似（空间和时间相关的）脉冲的估计峰值幅度来消除从这样的脉冲导出的位置误差信号中的偏移。使用另一对邻近脉冲对的差别来估计每个脉冲的最大峰值幅度。将位置误差信号差除以最大峰值振幅差以产生归一化位置误差信号，该归一化位置误差信号补偿由相邻采样平均引起的脉冲信号幅度估计的系统变化。

7. 发明申请

WO01035176A3 SERVO CONTROL APPARATUS AND METHOD USING ABSOLUTE VALUE INPUT SIGNALS 审中-公开
标题翻译：伺服控制装置和使用绝对值输入信号的方法
公开(公告)号：WO01035176A3
公开(公告)日：2001-11-22
申请号：PCT/US2000/030670
申请日：2000-11-07
IPC分类号： G05B13/02 , G05B13/04 , G05B19/19 , G05B21/02 , G11B5/55 , G11B5/596 , G11B21/02 , G11B21/08
CPC分类号： G11B21/022 , G05B13/026 , G05B13/04 , G05B13/048 , G05B19/19 , G05B2219/41369 , G11B5/5521 , G11B5/596 , G11B21/081
摘要： A servo control apparatus and method controls systems at least partially on the basis of an observable variable that has an absolute value functional relationship with the controlled variable and does not change sign for positive and negative variations from a nominal value. When applied to the positional control of an object, the control system observes a value of a position error signal and maps (148) that signal to two different potentially correct displacement values. Two estimators (150, 152) within the control system are initiated, one using the positive displacement and the other using the negative displacement, and the two estimators each predict the future position of the object and the corresponding position error signal for each estimated position. A new position error signal is detected and compared to the two estimated position error signals. After sufficient system evolution, the control system can select one or the other of the estimators as being correct and the associated displacement is identified as correct and is used for future positioning applications, preferably until the sign of the displacement of the head again becomes ambiguous. The control system can be used in combination with other control mechanisms including those using complimentary control information that provides more complete positioning information. The control method, system and apparatus find particularly advantageous application in magnetic storage hard disk drive systems.
摘要翻译：伺服控制装置和方法至少部分地基于与受控变量具有绝对值函数关系的可观察变量来控制系统，并且对于从标称值的正和负变化不改变符号。当应用于对象的位置控制时，控制系统观察位置误差信号的值，并将信号映射（148）到两个不同的潜在正确位移值。启动控制系统内的两个估计器（150,152），一个使用正位移，另一个使用负位移，两个估计器各自预测对象的未来位置和每个估计位置的对应位置误差信号。检测到新的位置误差信号并将其与两个估计的位置误差信号进行比较。在足够的系统演进之后，控制系统可以选择一个或另一个估计器是正确的，相关的位移被识别为正确的，并且用于将来的定位应用，优选地直到头部位移的符号再次变得不明确。控制系统可以与其他控制机制结合使用，包括使用提供更完整的定位信息的互补控制信息的控制系统。控制方法，系统和装置在磁存储硬盘驱动系统中特别有利。

8. 发明申请

WO99060571A1 METHOD AND APPARATUS UTILIZING FIELD RATIOING DEMODULATION TECHNIQUES FOR A NULL-TYPE SERVO PATTERN 审中-公开
标题翻译：使用空型伺服模式的现场比例解调技术的方法和装置
公开(公告)号：WO99060571A1
公开(公告)日：1999-11-25
申请号：PCT/US1999/009312
申请日：1999-04-29
IPC分类号： G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B21/081 , G11B5/5552 , G11B5/59655
摘要： A method of generating a position error estimate generates a phase field signal (470) and a position error field signal (472, 474). A set of operations (524, 542, 546, 712, 716) is performed on the phase field signal (470) and the same set of operations is performed on the position error field signal (472, 474). The result obtained by performing the set of operations on the position error field signal is divided by the results obtained by performing the set of operations on the phase field signal. The result of the division is the position error estimate. In addition, a demodulation circuit is provided that utilizes field ratioing.
摘要翻译：产生位置误差估计的方法产生相位场信号（470）和位置误差场信号（472,474）。对相位场信号（470）执行一组操作（524,542,546,712,716），并且对位置误差场信号（472,474）执行相同的一组操作。通过对位置误差场信号执行一组操作而获得的结果除以通过对相位场信号执行一组操作获得的结果。除法的结果是位置误差估计。此外，提供利用场比的解调电路。

9. 发明申请

WO1997019446A1 APPARATUS FOR RECORDING AN INFORMATION SIGNAL ON A RECORD CARRIER PROVIDED WITH TRACKING SIGNALS AND A RECORD CARRIER HAVING SUCH INFORMATION SIGNALS 审中-公开
标题翻译：用于记录提供跟踪信号的记录载体上的信息信号的装置和具有这种信息信号的记录载体
公开(公告)号：WO1997019446A1
公开(公告)日：1997-05-29
申请号：PCT/IB1996001200
申请日：1996-11-11
申请人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB
发明人： PHILIPS ELECTRONICS N.V. , PHILIPS NORDEN AB , HOOGENDOORN, Abraham , KALFS, Johannes, Jozef, Wilhelmus
IPC分类号： G11B20/12
CPC分类号： G11B21/081 , G11B5/5508 , G11B21/10 , G11B27/032 , G11B27/034 , G11B27/036 , G11B2220/20 , G11B2220/90
摘要： The invention thus relates to an apparatus for recording an information signal on a record carrier (1). The record carrier has a first and a second tracking signal (S1, S2) of specific frequencies and wavelengths (L) recorded in respective first and second tracks (T1, T2) running parallel to each other in their longitudinal direction on the record carrier. The apparatus is provided with means (30) for receiving the information signal, means (32) for converting the information signal into a channel signal, the channel signal comprising subsequent signal blocks (SBi) of information, each signal block comprising a portion of the information signal, means (34) for writing the channel signal in a third track (Ta) on the record carrier and reading at least one of the first and second tracking signals from said first and second tracks, generating means (38) for generating a control signal from the at least one of the first and second tracking signals read from the record carrier. The apparatus in accordance with the invention is adapted to record the information signal in the record carrier in such a way that the length of a signal block of the channel signal, when recorded in the third track, equals an integer number of the wavelength of said one of the first and the second tracking signals.
摘要翻译：因此，本发明涉及一种用于在记录载体（1）上记录信息信号的装置。记录载体具有记录在记录载体上在其纵向上彼此平行延伸的相应的第一和第二轨道（T1，T2）中的特定频率和波长（L）的第一和第二跟踪信号（S1，S2）。该装置设置有用于接收信息信号的装置（30），用于将信息信号转换为信道信号的装置（32），信道信号包括信息的后续信号块（SBi），每个信号块包括一部分信息信息信号，用于在所述记录载体上的第三磁道（Ta）中写入所述信道信号并从所述第一和第二磁道读取所述第一和第二跟踪信号中的至少一个的装置（34），用于生成来自从记录载体读取的第一和第二跟踪信号中的至少一个的控制信号。根据本发明的装置适于以信号信号的信号块的长度在记录在第三磁道中时等于所述第一磁道的波长的整数的方式将信息信号记录在记录载体中第一和第二跟踪信号之一。

10. 发明申请

WO1990003644A1 FAULT TOLERANT INDEX PATTERNS AND DECODING MEANS 审中-公开
标题翻译：错误的索引模式和解码方式
公开(公告)号：WO1990003644A1
公开(公告)日：1990-04-05
申请号：PCT/US1989004124
申请日：1989-09-20
申请人： MAXTOR CORPORATION
发明人： MAXTOR CORPORATION , WILSON, Rosser, S.
IPC分类号： G11B21/10
CPC分类号： G11B5/553 , G11B5/59633 , G11B21/081 , G11B27/3027
摘要： A fault tolerant servo index scheme (21) is described. The servo pattern (22, 23, 24) of the preferred embodiment is a twelve bit pattern chosen to limit the side lobes (5) of an autocorrelation plot of the pattern with a template (37) of the pattern. In this manner a greater number of errors can be tolerated while still permitting index identification. Initially, the entire servo pattern (22, 23, 24) on a servo track (26) (27) is detected in sequence at the bit rate. Each twelve bit sequence is compared (38) to a template (37) of the servo pattern (22, 23, 24), and the number of bits whose position and value (''1'' or ''0'') match the template (37) are determined. Whenever a threshold level (40), (less than the total number of bits in the pattern), of ''hits'' takes place it is assumed that the index has been detected. By minimizing the magnitude of the side lobes (5) of the correlation plot, the threshold can be set somewhere between complete correlation and the side lobe (5) number.

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