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首页> 外文期刊>IEEE Transactions on Magnetics >Effect of disk drive actuator unbalance on track following response to external vibration and shock
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Effect of disk drive actuator unbalance on track following response to external vibration and shock

机译：磁盘驱动器执行器不平衡对磁道跟随外部振动和冲击的影响

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摘要

A two-disk, 2 1/2" drive with a multirate observer-based controller is tested for operating vibration and shock, and the off-track performance of the servo system is measured. Measured data are compared to analytical predictions in each case. Actuator pivot unbalance is computed by comparing analysis results to measurement for 0.5 G sine sweep excitation. Four shock excitations are considered from 20 G to 100 G in amplitude, with 11 ms and 2 ms durations. Predicted off-track displacements are converted to corresponding position error quadrature signals for comparison to measurement. Measured acceleration excitation is also used as input to the analysis. Predicted response compares favorably with measurement for operating vibration, as well as for shock excitations of 20 G (11 ms), 50 G (11 ms), and 25 G (2 ms). For 100 G (2 ms) shock, predicted response varies significantly from measurement. The paper also includes a discussion of the control algorithm typically used for head positioning in Seagate small disk drives.
机译：测试了带有多速率基于观察者的控制器的两磁盘，2 1/2“驱动器的运行振动和冲击，并测量了伺服系统的偏离磁道性能。在每种情况下，将测量数据与分析预测进行比较。通过将分析结果与测量值进行比较，得出执行器枢轴不平衡度，测量值是0.5 G正弦扫频激励，考虑了20 G至100 G振幅的四个冲击激励，持续时间分别为11 ms和2 ms，将预测的偏离磁道的位移转换为相应的位置误差正交信号用于与测量的比较。测量的加速度激励也用作分析的输入。预测的响应与工作振动以及20 G（11 ms），50 G（11 ms）的冲击激励的测量结果相比具有优势，以及25 G（2 ms）。对于100 G（2 ms）的电击，预测的响应与测量值会有很大差异。本文还讨论了通常用于头部位置的控制算法希捷小型磁盘驱动器中。

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