Ballscrew mechanisms are commonly used in many precision positioning devices to convert rotary motion to translational motion. The manufacturing tolerances of a ballscrew play a significant role in the motion accuracy it can provide. However, in highly dynamic applications, the motion delivery of a ballscrew is not only influenced by the accuracy grade it has, but more importantly by the way it deforms and vibrates under the inertial loads and other forces. Although the challenge posed by the structural flexibilities can be dealt with by enhancing the system damping through mechanical re-design and modifications, a more robust and cost-effective approach would be to model these effects mathematically and try to compensate them by applying well-designed controls.
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