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Mathematical Problems in Engineering
Volume 2013, Article ID 875929, 5 pages
Research Article

Noise Source Identification of a Ring-Plate Cycloid Reducer Based on Coherence Analysis

1School of Mechanical Engineering, Dalian Jiaotong University, Dalian 116028, China
2School of Traffic and Transportation Engineering, Dalian Jiaotong University, Dalian 116028, China

Received 16 November 2012; Revised 8 March 2013; Accepted 8 March 2013

Academic Editor: Valentina E. Balas

Copyright © 2013 Bing Yang and Yan Liu. 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.


A ring-plate-type cycloid speed reducer is one of the most important reducers owing to its low volume, compactness, smooth and high performance, and high reliability. The vibration and noise tests of the reducer prototype are completed using the HEAD acoustics multichannel noise test and analysis system. The characteristics of the vibration and noise are obtained based on coherence analysis and the noise sources are identified. The conclusions provide the bases for further noise research and control of the ring-plate-type cycloid reducer.