A Control Strategy for Computer Numerical Control Machine Exhibiting Precision and Rapidity

[+] Author and Article Information
R. Doraiswami, A. Gulliver

University of New Brunswick, Fredericton, NB Canada

J. Dyn. Sys., Meas., Control 106(1), 56-62 (Mar 01, 1984) (7 pages) doi:10.1115/1.3149664 History: Received December 16, 1982; Online July 21, 2009


A digital controller for a closed loop computer numerical control machine demonstrating precision and rapidity in machining a given contour is proposed. The digital controller contains a digital filter which generates a copy of the reference input and the load torque disturbance signals. The reference inputs are both analytic and piecewise analytic signals. The closed loop system is stabilized using a digital stabilizer. The mathematical model of the process considers the lead-screw dynamics and the axial stiffness. Hybrid simulation of machining is used to compare conventional with proposed controllers. The effects of nonlinearities, noise, and parameter variation are considered in simulation.

Copyright © 1984 by ASME
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