Digital Control Algorithms for Electrohydraulic Machine Tool Feed Drive Servomechanisms

New digital control algorithms for improving the stiffness of electrohydraulic machine tool feed drive position servomechanisms are examined and compared with currently used analog and digital feed drive control algorithms, based on a digital computer simulation. The controller form considered is restricted to series digital compensation in the position loop. Some of the controller design considerations are described. The computational capabilities of current generation microcomputers are shown to be adequate for the application.