A reconfigurable system of chatter stability evaluation and monitoring for industrial machining processes

Abstract

This paper introduces an online prototype system including two independent modules of chatter stability prediction and monitoring for industrial applications. Turning processes are considered. At first, the stability charts are analysed by the Laplace transform. The charts obtained can assist the operators in selecting appropriate machining parameters before operations. Secondly, the characteristics of chatter are extracted in accordance with the variance and spectrum of vibration signals. The corresponding thresholds are adaptively confirmed by comparing the acquired signal with the stored stable cutting signal on line. Thirdly, the algorithms and modules introduced are implemented with the combination of the advantages of MATLAB and C sharp programming, in which delay strategy and overlap processing technique enable to improve the accuracy and performance of the system. Finally, industrial turning trials were conducted to verify the effectiveness of the proposed system.