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1. 发明授权

US4202019A Timing circuit and method for a track following servo in a data storage system 失效
标题翻译：数据存储系统中跟踪伺服跟踪的定时电路和方法
公开(公告)号：US4202019A
公开(公告)日：1980-05-06
申请号：US880906
申请日：1978-02-24
申请人： Paul M. Popoff , Siu K. Lee , James J. Touchton
发明人： Paul M. Popoff , Siu K. Lee , James J. Touchton
IPC分类号： G05D13/62 , G05D3/12 , G11B5/596 , G11B21/10 , G11B5/09
CPC分类号： G11B5/59616
摘要： A timing circuit for a track following servo system wherein an odd servo track having a series of prerecorded odd dibits thereon and an adjacent even servo track having a series of even dibits prerecorded thereon are moved with respect to a servo head to induce in the servo head signals that vary with the occurrence of the dibits and have an amplitude representative of the lateral position of the servo head with respect to the servo tracks. The servo head and its associated preamplifier produce a first signal having portions from both odd and even servo tracks and a second signal that is the inverse of the first signal. The first and second signals are processed by parallel identical circuit paths to generate a clocking signal that times the remainder of the data storage system in synchronism with the spacing of dibits on the servo tracks. Each of the parallel identical circuit paths includes a circuit for discriminating between true dibits and spurious noise signals on the servo tracks, a counter circuit for passing only those dibit pulses that occur within a given time interval after the next preceding dibit, and a circuit for producing a timing pulse at a specified time after the preceding pulse to maintain system synchronization even in the absence of a dibit on one of the tracks.
摘要翻译：一种跟踪伺服系统的定时电路，其中具有一系列预先记录的奇数二比特的奇数伺服轨道和一个预先记录有一系列偶数双位的相邻偶数伺服轨迹相对于伺服头移动以在伺服头中引起信号随着双位位数的发生而变化，并且具有表示伺服磁头相对于伺服磁道的横向位置的振幅。伺服头及其相关联的前置放大器产生具有来自奇数和偶数伺服磁道的部分的第一信号和与第一信号相反的第二信号。第一和第二信号由并行相同的电路路径处理，以产生与伺服磁道上的双位间隔同步的数据存储系统的其余部分的时钟信号。每个并行相同的电路路径包括用于鉴别伺服磁道上的真实二进制数和杂散噪声信号的电路，用于仅通过在下一个先前的双位之后的给定时间间隔内发生的那些双向脉冲的计数器电路，以及用于在前一脉冲之后的指定时间产生定时脉冲，以便即使在其中一个轨道上没有二进制也保持系统同步。

2. 发明授权

US4184108A Self-regulating electronic tachometer 失效
标题翻译：自调节电子转速计
公开(公告)号：US4184108A
公开(公告)日：1980-01-15
申请号：US854299
申请日：1977-11-23
申请人： Frank J. Sordello , James J. Touchton
发明人： Frank J. Sordello , James J. Touchton
IPC分类号： G01P3/42 , G05B19/23 , G05D3/12 , G05D13/62 , G11B5/55 , G11B21/10 , G05B5/01
CPC分类号： G05B19/232 , G11B5/5547 , G05B2219/37388 , G05B2219/41163
摘要： An electronic tachometer comprising an integrator having its output coupled to a variable gain amplifier and responsive to an input signal representative of the acceleration of a moveable load, such as a head assembly of a disk drive, for producing a coarse velocity signal at the output of the variable gain amplifier indicative of the load velocity, a tachometer gain correction circuit including another integrator coupled to receive the coarse velocity signal to produce a coarse distance signal indicative of distance traveled by the load and means for combining the coarse distance signal with a reference distance signal to produce a distance error signal which functions to adjust the gain of the variable gain amplifier so as to vary the coarse velocity signal to make the coarse distance signal equal to the reference distance signal, and accumulative error compensation means coupled to receive a gain indicative signal derived from the distance error signal to produce a signal input to the tachometer integrator which compensates for accumulative error in the tachometer output, whereby the tachometer accurately indicates load velocity.
摘要翻译：一种电子转速计，包括积分器，其输出端耦合到可变增益放大器，并且响应于代表可移动负载的加速度的输入信号，例如磁盘驱动器的磁头组件，用于在输出端产生粗速度信号所述可变增益放大器指示所述负载速度;转速计增益校正电路，包括被耦合以接收所述粗略速度信号的另一个积分器，以产生指示所述负载行进的距离的粗略距离信号;以及用于将所述粗距离信号与参考距离信号以产生距离误差信号，其用于调整可变增益放大器的增益，以便改变粗略速度信号以使粗距离信号等于参考距离信号，并且累加误差补偿装置被耦合以接收增益指示从距离误差信号得到的信号，产生输入到t的信号他的转速计积分器补偿了转速计输出中的累积误差，从而转速表精确地显示了负载速度。

3. 发明授权

US5774299A Adaptive calibration of read/write elements in a disc drive 失效
标题翻译：磁盘驱动器中读/写元件的自适应校准
公开(公告)号：US5774299A
公开(公告)日：1998-06-30
申请号：US696120
申请日：1996-08-13
申请人： Michael E. Baum , James J. Touchton , Keith W. Malang
发明人： Michael E. Baum , James J. Touchton , Keith W. Malang
IPC分类号： G11B5/596 , G11B21/10
CPC分类号： G11B5/59622 , G11B21/106 , G11B5/59627 , G11B5/59644
摘要： The track follow gain control of an actuator controller is calibrated by injecting a sinusoidal signal into the position error signal during a servo burst interrupt. The injected signal is bandpass filtered to optimize the coherence of the measurement. A sine error signal is derived based on the filtered (sine actual) signal and a sine desired signal. The sine error signal is applied to the track follow gain control to adjust the amplitude of the control signal to the actuator based on the sine error signal. The sine error is derived by averaging the peaks of the filtered injected signal and subtracting the averaged signal from the desired signal which represents the expected error of the sinusoidal signal under ideal conditions. The recording surfaces may be segmented into a plurality of radial zones in which case a central track is identified in one zone on a selected disc surface. The sine error signal is derived for that zone, after which the process is repeated for the corresponding zone of each other recording surface. The sine error signals derived from the several disc surfaces are averaged to adjust the track follow gain control for the common zone of all disc surfaces.
摘要翻译：通过在伺服突发中断期间将正弦信号注入位置误差信号来校准致动器控制器的跟踪增益控制。被注入的信号被带通滤波以优化测量的相干性。基于滤波（正弦实际）信号和正弦期望信号导出正弦误差信号。正弦误差信号被施加到跟踪跟随增益控制，以基于正弦误差信号来调节到致动器的控制信号的幅度。正弦误差是通过对滤波后的注入信号的峰值进行平均而从理想条件下的正弦信号的期望误差的期望信号中减去平均信号得到的。记录表面可以被分割成多个径向区域，在这种情况下，在所选择的盘表面上的一个区域中识别出中心轨迹。对于该区域导出正弦误差信号，之后对每个其他记录表面的相应区域重复该过程。从几个盘表面导出的正弦误差信号被平均以调整所有盘表面的公共区域的跟踪增益控制。

4. 发明授权

US4622499A Method and apparatus for controlling a motor 失效
标题翻译：用于控制电动机的方法和装置
公开(公告)号：US4622499A
公开(公告)日：1986-11-11
申请号：US706147
申请日：1985-02-27
申请人： John P. Squires , Alan D. Kronisch , John J. Freeman , James J. Touchton
发明人： John P. Squires , Alan D. Kronisch , John J. Freeman , James J. Touchton
IPC分类号： H02P6/06 , H02P6/16 , H02P6/02
CPC分类号： H02P6/06 , H02P6/17
摘要： An n-phase DC motor is controlled by converting a motor speed command signal generated from a programmed CPU to a motor drive signal and using this motor drive signal to apply DC power to a selected phase of the motor, the amount of applied DC power being a function of the value of the motor speed command signal. Signals representing the position and/or speed of the motor are supplied to the CPU from which the CPU detects speed errors. The speed command signal then is modified to speed up or slow down the motor so as to reduce the detected errors.
摘要翻译：通过将从编程的CPU产生的电动机速度指令信号转换为电动机驱动信号并使用该电动机驱动信号将DC电力施加到电动机的所选相位来控制n相直流电动机，所施加的直流电力的量为电机速度指令信号的值的函数。表示电机的位置和/或速度的信号被提供给CPU从CPU检测到速度误差。然后修改速度指令信号以加速或减慢电机，以减少检测到的误差。

5. 发明授权

US4539608A Low offset position demodular 失效
标题翻译：低偏移位置解调
公开(公告)号：US4539608A
公开(公告)日：1985-09-03
申请号：US447823
申请日：1982-12-08
申请人： John P. Hill , James J. Touchton
发明人： John P. Hill , James J. Touchton
IPC分类号： G11B5/596 , H03D1/22 , H03D1/06 , G11B21/10
CPC分类号： G11B5/59627 , H03D1/229
摘要： A low offset position demodulator that may be used in the positioning servo of a disk drive or similar device. A first stage of the demodulator circuit multiplies or switches a servo carrier signal, modulated with position information, with a synchronized gate signal. This first stage of the demodulator circuit includes a differential output and means for controlling the common mode operating point thereof with an external control voltage. A low pass filter, also having a differential output, is coupled to the differential output of the first stage of the demodulator. A differential-to-single-ended conversion stage is tied to the low pass filter output to provide a single position output signal. Also coupled to the low pass filter differential output is an averaging network that averages the signal appearing on one of the two differential signal lines with the signal appearing on the other differential signal line. The resulting averaged signal is compared to a zero voltage reference signal and the difference between these two signals is then used to derive the control voltage applied to the first stage of the modulator. Hence, the common mode operating point of the balanced demodulator is forced to assume and maintain a zero volt level.
摘要翻译：可用于磁盘驱动器或类似设备的定位伺服中的低偏移位置解调器。解调器电路的第一级用同步的门信号乘以或切换用位置信息调制的伺服载波信号。解调器电路的第一级包括差分输出和用于利用外部控制电压来控制其共模工作点的装置。也具有差分输出的低通滤波器耦合到解调器的第一级的差分输出。差分到单端转换级与低通滤波器输出相连以提供单个位置输出信号。还耦合到低通滤波器差分输出的是平均网络，其平均化出现在两个差分信号线之一上的信号，信号出现在另一个差分信号线上。将所得到的平均信号与零电压参考信号进行比较，然后使用这两个信号之间的差异来推导施加到调制器的第一级的控制电压。因此，平衡解调器的共模工作点被强制为维持零伏电平。

6. 发明授权

US4188646A Sectorized data path following servo system 失效
标题翻译：跟随伺服系统的扇区数据路径
公开(公告)号：US4188646A
公开(公告)日：1980-02-12
申请号：US910257
申请日：1978-05-30
申请人： Frank J. Sordello , Edward R. Darrah , James J. Touchton
发明人： Frank J. Sordello , Edward R. Darrah , James J. Touchton
IPC分类号： G11B23/30 , G05D3/12 , G11B5/596 , G11B21/10
CPC分类号： G11B5/59616
摘要： A servo system for accurately positioning a transducer relative to data paths on a recording medium by detecting sync and servo signals from two parallel abutting servo tracks sharing a common longitudinal boundary within circumferentially spaced sectors of the medium. Within each sector of the recording medium, two servo waveforms of different frequencies in two abutting servo tracks are preceded by a sync reference waveform of the same frequency in both servo tracks which is used as a reference for a phase locked oscillator, connected to the transducer, generating a pair of modulation signals that are to be mixed with transducer signals from both servo waveforms. A pair of servo channels are provided for receiving the pair of modulation signals and the servo signals for deriving an imbalance error signal representing deviation of the transducer from the center line of a data path, which is the projection from the sectors of the common longitudinal boundary between servo tracks. The imbalance error signal is used to center the transducer on the data path.
摘要翻译：一种伺服系统，用于通过从介质周向间隔开的共享共同纵向边界的两个平行的邻接伺服轨道检测同步和伺服信号，来相对于记录介质上的数据路径精确地定位换能器。在记录介质的每个扇区内，在两个邻接的伺服磁道中的两个不同频率的伺服波形之前是两个伺服磁道中相同频率的同步参考波形，该同步参考波形用作锁相振荡器的基准，连接到换能器产生要与来自两个伺服波形的换能器信号混合的一对调制信号。提供一对伺服通道用于接收一对调制信号和伺服信号，用于导出表示换能器与数据路径的中心线偏离的不平衡误差信号，该数据路径是来自公共纵向边界的扇区的投影伺服磁道之间。不平衡误差信号用于将传感器置于数据通路上。

7. 发明授权

US4967291A Method and apparatus for preventing an over-velocity error condition of a hard disk drive system 失效
标题翻译：用于防止硬盘驱动系统的超速错误状态的方法和装置
公开(公告)号：US4967291A
公开(公告)日：1990-10-30
申请号：US266127
申请日：1988-11-02
申请人： James J. Touchton , Todd D. Baumann
发明人： James J. Touchton , Todd D. Baumann
IPC分类号： G11B5/55
CPC分类号： G11B5/5547
摘要： An apparatus for detecting an over-velocity error condition of a head actuator driven by a voice coil motor in a hard disk drive system includes an integrator for providing an integrated value of the current flowing through the voice coil motor and a detector for detecting when the integrated value exceeds a threshold value. In response to this detection, the supply of current through the voice coil motor is interrupted. To prevent false detections, the integrator is inhibited until the motor current reaches a level indicative of a track access operation.
摘要翻译：用于检测由硬盘驱动系统中的音圈电动机驱动的磁头致动器的超速度误差状态的装置包括：积分器，用于提供流过音圈电动机的电流的积分值;以及检测器，用于检测何时积分值超过阈值。响应于该检测，通过音圈电机的电流供应被中断。为了防止错误检测，积分器被禁止，直到电动机电流达到指示轨道存取操作的水平。

8. 发明授权

US4321517A Resonance suppression method 失效
标题翻译：共振抑制方法
公开(公告)号：US4321517A
公开(公告)日：1982-03-23
申请号：US99988
申请日：1979-12-03
申请人： James J. Touchton , John P. Hill
发明人： James J. Touchton , John P. Hill
IPC分类号： G11B5/55 , G05B5/01
CPC分类号： G11B5/553
摘要： A method of suppressing resonances in electro-mechanical servo systems is disclosed. The servo systems are of the type where first signals indicative of actual position of the servo system are differentiated and second signals indicative of the acceleration of the system are integrated. The differentiated signals are applied to the integrator in order to provide accurate initialization thereof. In modes of operation where the acceleration of the system is substantially zero, the differentiators are not used, thus decoupling the mechanical system from the electronic control system and eliminating resonance from the servo loop. The duty cycle of the differentiators is varied in differing modes of operation of the servo system so as to provide maximum bandwidth and speed to the system coupled with minimum errors in positioning. The system is described in connection with the servoing of magnetic read/write heads radially with respect to rotating magnetic disk data storage media.
摘要翻译：公开了一种抑制机电伺服系统中的共振的方法。伺服系统是类型，其中指示伺服系统的实际位置的第一信号是微分的，并且表示系统的加速度的第二信号被集成。差分信号被施加到积分器，以便提供其准确的初始化。在系统的加速度基本上为零的操作模式中，不使用微分器，从而将机械系统与电子控制系统解耦并消除伺服回路的共振。微分器的占空比在伺服系统的不同操作模式中是变化的，以便为系统提供最大的带宽和速度以及定位中的最小误差。结合磁盘读/写磁头径向相对于旋转磁盘数据存储介质的伺服来描述该系统。

9. 发明授权

US4051423A Servo system with feedback signal compensation 失效
标题翻译：具有反馈信号补偿的伺服系统
公开(公告)号：US4051423A
公开(公告)日：1977-09-27
申请号：US656897
申请日：1976-02-10
申请人： James J. Touchton , John Cuda , Frank J. Sordello
发明人： James J. Touchton , John Cuda , Frank J. Sordello
IPC分类号： G05D3/12 , G05B11/36 , G05D3/14 , G05B5/01
CPC分类号： G05D3/1445
摘要： A signal compensator for a position servo loop system to attenuate the position error signal and provide stability at a larger band width by limiting the position actuator current in selected frequency ranges.

10. 发明授权

US4502021A Constant bandwidth automatic gain control system 失效
标题翻译：恒定带宽自动增益控制系统
公开(公告)号：US4502021A
公开(公告)日：1985-02-26
申请号：US481084
申请日：1983-03-31
申请人： John P. Hill , James J. Touchton
发明人： John P. Hill , James J. Touchton
IPC分类号： G11B5/596 , H03G1/00 , H03G3/30 , H03G3/10
CPC分类号： H03G3/3036 , G11B5/59622 , H03G1/0023
摘要： A constant bandwidth automatic gain control (AGC) system is presented. The system is especially suitable for use in the positioning servo system of a magnetic disk storage system. The system includes a double balanced modulator circuit and a fixed gain video amplifier circuit. The double balanced modulator circuit functions as a variable gain element, and the gain thereof is set by a control voltage derived from an otherwise conventional AGC loop. The gain of the current steering stage of the double balanced modulator is limited to values no greater than 0.5.
摘要翻译：提出了一种恒定带宽自动增益控制（AGC）系统。该系统特别适用于磁盘存储系统的定位伺服系统。该系统包括双平衡调制器电路和固定增益视频放大器电路。双平衡调制器电路用作可变增益元件，并且其增益由通过另一常规AGC环路导出的控制电压来设定。双平衡调制器的电流转向级的增益被限制在不大于0.5的值。

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