发明授权
US06690534B2 Method and apparatus for handling multiple resonance frequencies in disc drives using active damping
有权
用于使用主动阻尼处理磁盘驱动器中的多个共振频率的方法和装置
- 专利标题: Method and apparatus for handling multiple resonance frequencies in disc drives using active damping
- 专利标题(中): 用于使用主动阻尼处理磁盘驱动器中的多个共振频率的方法和装置
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申请号: US09827339申请日: 2001-04-05
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公开(公告)号: US06690534B2公开(公告)日: 2004-02-10
- 发明人: MingZhong Ding , YangQuan Chen , LeeLing Tan , Wing Kong Chiang , KianKeong Ooi , BengWee Quak
- 申请人: MingZhong Ding , YangQuan Chen , LeeLing Tan , Wing Kong Chiang , KianKeong Ooi , BengWee Quak
- 主分类号: G11B5596
- IPC分类号: G11B5596
摘要:
A method of handling multiple resonance frequencies in a disc drive includes monitoring a position error signal (PES) for an actuator arm, generating a plurality of feedforward compensation signals from the PES using a plurality of bandpass filters, and applying the compensation signals to a servo control signal. Each filter has a center frequency that is set to a problematic resonance frequency. The method may also include identifying the problematic frequencies by, for example, commanding a movement of the actuator arm, collecting data points for the PES that are associated with the movement, and performing a digital fourier transform of the data points to identify resonant frequencies. Other methods of identifying problematic frequencies include analyzing PES zero-crossing data, or using principal component analysis.