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Shock and Vibration
Volume 2017 (2017), Article ID 9706493, 9 pages
https://doi.org/10.1155/2017/9706493
Research Article

Active Control for Multinode Unbalanced Vibration of Flexible Spindle Rotor System with Active Magnetic Bearing

Shaoxing University Yuanpei College, Shaoxing 312000, China

Correspondence should be addressed to Guojun Hu

Received 3 March 2017; Accepted 24 April 2017; Published 6 June 2017

Academic Editor: Aly-Mousaad Aly

Copyright © 2017 Xiaoli Qiao and Guojun Hu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The unbalanced vibration of the spindle rotor system in high-speed cutting processes not only seriously affects the surface quality of the machined products, but also greatly reduces the service life of the electric spindle. However, since the unbalanced vibration is often distributed on different node positions, the multinode unbalanced vibration greatly exacerbates the difficulty of vibration control. Based on the traditional influence coefficient method for controlling the vibration of a flexible rotor, the optimal influence coefficient control method with weights for multinode unbalanced vibration of flexible electric spindle rotors is proposed. The unbalanced vibration of all nodes on the whole spindle rotor is used as the control objective function to achieve optimal control. The simulation results show that the method has an obvious control effect on multinode unbalanced vibration.