Author(s)

G. Holroyd, C. Pislaru & D.G. Ford

Abstract

An estimation of the dynamic behaviour of ball-screw systems is particularly important in the industrial processes where significant cost savings can be acheved by optimising the drive operation. The dynamic behaviour of a ballscrew system is modelled using a finite element approach in this paper. The nut exerts a significant lateral restraint on transverse vibration of the screw in the case of a ball-screw. The effect of this vibration varies with time as the nut moves. This implies that the natural frequencies of a ball-screw system change with time. The method described models the dynamic behaviour of a ball-screw taking the moving nut into account. The analysis accuracy was improved by integrating the accumulated data (

Keywords