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SIAM J. Appl. Math. 72, pp. 1-24 (24 pages)
Stabilization in a State-Dependent Model of Turning Processes
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Add to FacebookWe consider a two-degree-of-freedom model for turning processes which involves a system of differential equations with state-dependent delay. Depending on process parameters (e.g., spindle speed, depth of cut) the cutting tool can exhibit unwanted vibrations, resulting in a nonsmooth surface of the workpiece. In this paper we propose a feedback law to stabilize the turning process for a large range of system parameters. The feedback law introduces a generic nonhyperbolic stationary point into the model, which generates the main technical challenge of this work. We establish the stability equivalence between the differential equations with state-dependent delay and a corresponding nonlinear system with the delay fixed at its stationary value. Then we show the stability of that nonlinear system with constant delay by computing its normal form. Finally, we obtain conditions on system parameters which guarantee the stability of the state-dependent delay model at the nonhyperbolic stationary point.
© 2012 Society for Industrial and Applied Mathematics
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Received February 07, 2011
Accepted September 27, 2011
Published online January 03, 2012
Accepted September 27, 2011
Published online January 03, 2012
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