Proceedings ArticleDOI
Research on the Influence of Feed Speed Variation on Turning Chatter Stability
TLDR
The efficiency of feed speed variation was studied, the optimal control parameters for chatter suppression were proposed and the improvement of stability limit was verified by the Simulink software.Abstract:
Turning operation is one of the most widely used machining process but its machining efficiency often subjected to the chatter phenomenon. In order to suppress the chatter, this paper investigated the influence of feed speed on the chatter stability and proposed a feed speed variation method. The regenerative chatter mechanisms of two different turning operations were analyzed in detail namely orthogonal and cylindrical turning operation. The efficiency of feed speed variation was studied, the optimal control parameters for chatter suppression were proposed and the improvement of stability limit was verified by the Simulink software.read more
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Journal ArticleDOI
Updated semi‐discretization method for periodic delay‐differential equations with discrete delay
Tamás Insperger,Gabor Stepan +1 more
TL;DR: In this paper, an updated version of the semi-discretization method is presented for periodic systems with a single discrete time delay, where the delayed term is approximated as a weighted sum of two neighboring discrete delayed state values and the transition matrix over a single period is determined.
Journal ArticleDOI
A review of chatter vibration research in turning
TL;DR: In this article, some of the chatter stability prediction, chatter detection and chatter control techniques for the turning process are reviewed to summarize the status of current research in this field and to identify a research scope in this area.
Journal ArticleDOI
Autoresonant control of ultrasonically assisted cutting
TL;DR: In this paper, the authors describe the development of an autoresonant system with supervisory computer control, which was successfully used for the control of piezoelectric transducers during ultrasonically assisted turning.
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Stiffness variation method for milling chatter suppression via piezoelectric stack actuators
TL;DR: In this article, the stiffness variation (SV) method was employed through modulating the stiffness around a nominal value in order to suppress milling chatter, and the results of stability analysis were verified by time domain simulation.
Journal ArticleDOI
Chatter suppression in fast tool servo-assisted turning by spindle speed variation
TL;DR: In this article, an enhanced closed loop dynamic model of the non-circular turning process is developed, in which the fast tool servo employs an active disturbance rejection control scheme.