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RESEARCH PAPERS

A Comprehensive Identification of Tool Failure and Chatter Using a Parallel Multi-ART2 Neural Network

[+] Author and Article Information
X. Q. Li, Y. S. Wong, A. Y. C. Nee

Mechanical and Production Engineering Department, National University of Singapore, Singapore 119260

J. Manuf. Sci. Eng 120(2), 433-442 (May 01, 1998) (10 pages) doi:10.1115/1.2830144 History: Received October 01, 1994; Revised April 01, 1997; Online January 17, 2008

Abstract

Tool failure and chatter are two major problems during machining. To detect and distinguish the occurrences of these two abnormal conditions, a novel parallel multi-ART2 neural network has been developed. An advantage of this network is more reliable identification of a variety of complex patterns. This is due to the sharing of multi-input feature information by its multiple ART2 subnetworks which allow for finer vigilance thresholds. Using the maximum frequency-band coherence function of two acceleration signals and the relative weighted frequency-band power ratio of an acoustic emission signal as input feature information, the network has been found to identify various tool failure and chatter states in turning operations with a total of 96.4% success rate over a wide range of cutting conditions, compared to that of 80.4% obtainable with the single-ART2 neural network.

Copyright © 1998 by The American Society of Mechanical Engineers
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