揺動形アクチュエータの位置決め特性に及ぼすピボットすきまの影響

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  • Effect of pivot clearance on head positioning of a rotary actuator for magnetic disk storage.
  • ヨウドウガタ アクチュエータ ノ イチギメ トクセイ ニ オヨボス ピボット

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The effect of pivot clearance on the dynamic characteristics of a rotary actuator for head positioning in magnetic disk storage is numerically investigated. A motion equation which takes pivot clearance and pivot bearing elasticity into account is derived for a track-following servo controlled actuator. Elastic deformation of a bearing as well as head positioning error increase in a sudden step when the bearing makes alternating impacts at the antipodes of the pivot shaft. Based of the result, design criteria are obtained for the maximum acceptable clearance for high accuracy in head positioning.

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