发明授权
- 专利标题: Piezoelectric vibration damping for disk drives
- 专利标题(中): 磁盘驱动器的压电振动阻尼
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申请号: US09338836申请日: 1999-06-23
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公开(公告)号: US06310746B1公开(公告)日: 2001-10-30
- 发明人: Muhammad A. Hawwa , Jamshid Bozorgi
- 申请人: Muhammad A. Hawwa , Jamshid Bozorgi
- 主分类号: G11B5012
- IPC分类号: G11B5012
摘要:
The present invention provides passive and active damping systems for reducing or substantially eliminating undesirable vibrations from components of data storage and retrieval systems. The passive and active damping systems incorporate piezoelectric materials, and make use of an advantageous property of these materials, namely the ability to convert mechanical strains into electric potentials and vice versa. The passive systems of the present invention dissipate vibrational energy through an electrical shunt circuit. The active systems seek to cancel an existing vibration in a component by generating and applying an additional vibration to the same component, where the applied vibration is out of phase with the existing vibration and the two vibrations tend to add destructively. Active systems, in certain circumstances, may also be able to anticipate predictable vibrations and proactively cancel them, rather than merely reacting to vibrations after they arise.
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