Suspension Design for Windage and High Bandwidth

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  • 105 風乱と高バンド幅化に対するサスペンションの設計法

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This paper reports on the resonance controls of a suspension used for a magnetic Hard-Disk Drive (HDD). First, the control method of torsion mode gain, induced by shaking, is described. Secondly, the control method of torsion mode suspension flutter, induced by air turbulence, is described. The mechanism of first torsion suspension flutter was investigated, and the evaluation method by calculations was proposed. Finally, a new type of suspension using two separate parts for the loadbeam was designed. The evaluation results of the actual samples agreed with the calculated values. The new design achieved considerably high performance of suspension flutter characteristics with very high resonance frequency of first torsion mode.

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