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Shock and Vibration
Volume 20, Issue 2, Pages 273-286

Effects of Eccentricity on the Dynamic Behavior for Electromechanical Integrated Toroidal Drive

Lizhong Xu and Haifeng Li

Mechanical Engineering Institute, Yanshan University, Qinhuangdao, Hebei, China

Received 21 December 2011; Revised 1 September 2012; Accepted 9 September 2012

Copyright © 2013 Hindawi Publishing Corporation. 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.


In electromechanical integrated toroidal drive, eccentric center errors occur which has important influences on the dynamic behavior of the drive system. Here, the dynamic equations of the drive system with eccentric center are presented. Changes of the natural frequencies and vibrating modes along with eccentric center distance are analyzed. The forced responses of the drive system to eccentric center excitation are investigated. Results show that the eccentric center causes some natural frequencies to increase, and the other natural frequencies to drop. It also causes some vibrations to become weak, and the other vibrations to become strong. The eccentric center has more obvious effects on the dynamic behavior of the planets. The results are useful in design and manufacture of the drive systems.