Title :
Model reference estimation and control of tool chatter
Author_Institution :
Dept. of Mech. Eng., American Univ. of Beirut, Lebanon
Abstract :
A mathematical model is derived to predict tool chatter in milling processes. The mathematical model parameters are estimated under changing machining conditions by an online model reference series-parallel estimation strategy. By applying the proposed method, variations in the machining process are compensated for by subsequent changes in both the feed velocity and the spindle speed. Changes of feed velocity and spindle speed are carried out by a model reference parallel-parallel adaptive control strategy. The spindle speed and feed velocity are modified to minimize tool chatter and maintain the stability of the whole system. The strategy of estimation and adaptation has been implemented on a computer-controlled milling machine
Keywords :
computerised numerical control; machining; model reference adaptive control systems; vibration control; changing machining conditions; computer-controlled milling machine; feed velocity; mathematical model; milling processes; model reference adaptive control; model reference estimation; spindle speed; tool chatter control; Adaptive control; Damping; Equations; Feeds; Machine tools; Machining; Mathematical model; Milling; Parameter estimation; Velocity control;
Conference_Titel :
Circuits and Systems, 1990., Proceedings of the 33rd Midwest Symposium on
Conference_Location :
Calgary, Alta.
Print_ISBN :
0-7803-0081-5
DOI :
10.1109/MWSCAS.1990.140810
