TWO-LEVEL PREDICTIVE BASED AXIS CONTROL FOR VIRTUAL MACHINE TOOL

摘要

Dealing with activation of trajectory constraints within machine-tools CNC is usually performed directly by the axis controllers, leading to a compromise with axis performance. This paper presents an original strategy, including classical predictive feedback axis controllers, with an upper level real time trajectory planning module. This module realized without any structural changes in the main control loop is addressed within an open architecture machine-tool framework to avoid trajectory constraints activation. This strategy is finally tested in a virtual machine-tool dedicated to advanced control strategies evaluation.