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    • 1. 发明授权
    • Disturbance rejection for disc drives using adaptive accelerometer feedforward servo
    • 使用自适应加速度计前馈伺服的磁盘驱动器的干扰抑制
    • US06580579B1
    • 2003-06-17
    • US09621163
    • 2000-07-21
    • Yi-Ping HsinJohn C. MorrisDustin M. Cvancara
    • Yi-Ping HsinJohn C. MorrisDustin M. Cvancara
    • G11B5596
    • G11B5/59627G11B5/5582
    • A system and method for attenuating the effect of rotational vibration on the positioning of the read/write head in a disc drive. The rotational acceleration of the disc drive body is sensed and applied to an adaptive filter that produces a feedforward signal designed to offset the effects of the rotational vibration. The adaptive filter adjusts its parameters based on the rotational acceleration signal, the position error signal of the servo system, and a transfer function relating the actual position signal to the feedforward signal. The plant estimate of the transfer function relating the actual position signal to the feedforward signal is determined off-line and stored for use by the adaptive filter in adjusting its parameters during operation.
    • 一种用于衰减旋转振动对读/写头在盘驱动器中的定位的影响的系统和方法。 磁盘驱动器体的旋转加速度被感测并施加到自适应滤波器,该自适应滤波器产生被设计为抵消旋转振动的影响的前馈信号。 自适应滤波器基于旋转加速度信号,伺服系统的位置误差信号和与实际位置信号与前馈信号相关联的传递函数来调整其参数。 关于实际位置信号与前馈信号的传递函数的工厂估计被离线地确定并存储供自适应滤波器在操作期间调节其参数。
    • 2. 发明授权
    • Method and apparatus for servo data synchronization in a disc drive
    • 磁盘驱动器中伺服数据同步的方法和装置
    • US06341048B1
    • 2002-01-22
    • US09488377
    • 2000-01-20
    • John C. MorrisDustin M. Cvancara
    • John C. MorrisDustin M. Cvancara
    • G11B2110
    • G11B5/5965G11B5/59611
    • A method and apparatus are provided for positioning a head based on a control signal and a cancellation signal. In the method and apparatus, a sensor located in the disc drive is capable of generating sensor data samples at a sensor data rate that is different from a servo data rate. A data enlarger inserts additional data samples between the sensor data samples to produce enlarged data that is filtered to produce filtered data, which is decimated to form decimated sensor data at the servo data rate. A cancellation component converts the decimated sensor data into a cancellation signal that may be combined with a control signal to control the actuator. A sensor chip is also provided that includes a sensing element and a sigma-delta circuit that cooperate to generate sensor samples at a sensor data rate and a buffer that stores sensor samples at the sensor data rate.
    • 提供了一种基于控制信号和消除信号来定位头的方法和装置。 在该方法和装置中,位于盘驱动器中的传感器能​​够以不同于伺服数据速率的传感器数据速率生成传感器数据采样。 数据放大器在传感器数据样本之间插入附加数据样本,以产生被过滤以产生滤波数据的放大数据,其被抽取以以伺服数据速率形成抽取的传感器数据。 取消组件将抽取的传感器数据转换成可与控制信号组合的消除信号,以控制致动器。 还提供了一种传感器芯片,其包括感测元件和Σ-Δ电路,其协作以传感器数据速率生成传感器样本,以及以传感器数据速率存储传感器样本的缓冲器。
    • 6. 发明授权
    • In-situ testing of a MEMS accelerometer in a disc storage system
    • 在磁盘存储系统中的MEMS加速度计的现场测试
    • US06629448B1
    • 2003-10-07
    • US09766285
    • 2001-01-19
    • Dustin M. Cvancara
    • Dustin M. Cvancara
    • G01P1508
    • G01P21/00G01P15/08
    • A disc storage system performing an in-situ test on a MEMS accelerometer, in a disc drive. The circuit includes a control circuit that establishes a desired self test condition conducive to the in-situ test during a self test interval. The circuit includes a stored reference representing at least one characteristic limit of an integrity output of the, MEMS accelerometer. The circuit includes a test circuit that receives the integrity output value and the stored reference during the in-situ test interval and that generates an in-situ test output representative of integrity of the MEMS accelerometer. Damaged or degraded MEMS accelerometers can be diagnosed in-situ.
    • 盘式存储系统,其在盘式驱动器中对MEMS加速度计进行原位测试。 该电路包括一个控制电路,该控制电路在自检间隔期间建立有利于原位测试的期望的自检条件。 该电路包括表示MEMS加速度计的完整性输出的至少一个特征极限的存储的参考。 电路包括测试电路,其在原位测试间隔期间接收完整性输出值和存储的参考,并产生代表MEMS加速度计完整性的原位测试输出。 可以原位诊断损坏或降级的MEMS加速度计。