Performance-based control for the machining process and its application

A new concept and control scheme, performance-based control is proposed in this paper, which is different from geometry-based control (e.g. CNC) and i nformation-based control (e.g., multi-sensor fusion) and used to control ma chining processes. Two case studies are offered to show the control scheme applications: (1) a self-learning predictive control algorithm for position ing precision of a keyway milling machine driven by uncontrollable AC motor s and (2) a self-learning fuzzy control algorithm for a 2" CNC dividing hea d used in workshop conditions. The kernel technology of the two cases will be described in detail. (C) 1999 Elsevier Science B.V. All rights reserved.