METHOD AND SYSTEM FOR ADAPTIVE CONTROL OF TURNING OPERATIONS

摘要

An adaptive control system for adaptively controlling a turning operation performed at a workpiece by a turning tool adjusts a controlled input operation parameter F to maintain an output operation parameter .DELTA.M substantially at a predetermined value .DELTA.Mo to compensate variation of the output operation parameter .DELTA.M caused by the variation of at least one operation condition B = B(t). The system comprises a sensor (8) of the output operation parameter .DELTA.M for providing a signal Uc proportional t o a current value .DELTA.Mc, and an adaptive controller (10) for determining a value Fc to which the input operation parameter F should be adjusted, as a function of kUc, where k is a signal transmission coefficient which comprise s an invariant signal transmission coefficient component ko inversely proportional to .DELTA.Mo. The adaptive controller (10) includes an amplifie r (14) transforming the signal Uc into koUc, and an input parameter override unit (9) controlled to adjust the controlled operation input parameter to Fc . The adaptive controller (10) further comprises a correction processing means (16) calculating kcUc, where kc is a varying signal transmission coefficient component whose current values depend on the variation of the operation condition B = B(t). The adaptivecontroller (10) is capable of calculating k=f(ko,kc).