Compensation for cutting force induced bore cylindricity dynamic errors-a hybrid repetitive servo/iterative learning process feedback control approach

摘要

In this paper, a fast tool actuator is utilized to achieve dynamic variable depth of cut machining and compensate for bore cylindricity errors in machined components. The cylindricity errors addressed are those caused by the elastic deformation of the workpiece dur to froces applied to the workpiece both during and after the machining process. A two-level control scheme, which consists of a repetitive control servo loop and an iterative learning intermittent process feedback loop, is proposed. The stability and convergence of the error dynamics are analyzed using a model for the flexure-induced machining errors. Experimental results demonstrate that the proposed method can significantly improve bore cylindricity in machined components.