Title: Feed drive modelling for the simulation of tool path tracking in multi-axis high speed machining
Authors: David Prevost, Sylvain Lavernhe, Claire Lartigue, Didier Dumur
Addresses: Laboratoire Universitaire de Recherche en Production Automatisee, ENS Cachan, 61 avenue du President Wilson, 94235 Cachan cedex, France. ' Laboratoire Universitaire de Recherche en Production Automatisee, ENS Cachan, 61 avenue du President Wilson, 94235 Cachan cedex, France. ' Laboratoire Universitaire de recherche en Production Automatisee, ENS Cachan, 61 avenue du President Wilson, 94235 Cachan cedex, France; IUT Cachan, Universite Paris Sud 11, 9 Avenue de la division Leclerc, 94234 Cachan cedex, France. ' Control Department, SUPELEC, 3 rue Joliot Curie, 91192 Gif-sur-Yvette cedex, France
Abstract: Within the context of high speed machining, it is essential to manage the trajectory generation to achieve both high surface quality and high productivity. As feed drives are one part of the set machine tool-numerical controller, it is necessary to improve their performances to optimise feed drive dynamics during trajectory follow up. Hence, this paper deals with the modelling of the feed drive in the case of multi axis machining. This model can be used for the simulation of axis dynamics and tool-path tracking to tune parameters and optimise new frameworks of command strategies. A procedure of identification based on modern NC capabilities is presented and applied to industrial HSM centres. Efficiency of this modelling is assessed by experimental verifications on various representative trajectories. After implementing a generalised predictive control (GPC), reliable simulations are performed thanks to the model. These simulations can then be used to tune parameters of this new framework according to the tool-path geometry.
Keywords: simulation; high speed machining; multi-axis machining; trajectory follow-up; identification; generalised predictive control; GPC; feed drive modelling; tool path tracking; trajectory generation; feed drives; NC machining.
International Journal of Mechatronics and Manufacturing Systems, 2011 Vol.4 No.3/4, pp.266 - 284
Received: 21 Jun 2010
Accepted: 12 Jul 2010
Published online: 24 Jul 2011 *