A HIGH-PRECISION SYNCHRONIZING CONTROL-SYSTEM FOR BIAXIAL POSITIONINGTABLES

In this paper, a control system is designed that synchronizes the moti ons of biaxial positioning tables. The control system consists of nonl inear feedback laws of the displacements and the velocities of the tab le along its axes. It is proved that in the absence of parametric unce rtainty and disturbances, the designed control system generates desire d contours, for instance, contours with sharp corners, such as a heart -shaped contour (cardioid), on the workpiece, with zero error in finit e time. Simulation results show that the designed control system compe nsates for the effects of parametric uncertainty and disturbances to t he system.