Simulation of Active Suppression of Boring Bar Vibrations by Means of Boring Bar’s ”1-D” Finite Element Model

• In metal cutting active control is one method that may be used to attenuate vibration of a boring bar during an internal turning operation. It is based on the utilization of an active boring bar with an embedded piezoceramic actuator and a suitable controller, etc. In this case, the primary boring bar vibrations originating from the material deformation process may be suppressed with secondary "anti-" vibrations induced by the actuator. The design of an active boring bar is usually a tedious and costly procedure, which involves decision making concerning the selection of the actuator characteristics, its position inside the boring bar as well as production and testing of several active boring bar prototypes. Therefore accurate mathematical modeling of the active control system; including the active boring and controller, etc. is of importance. In this paper a simple “1-D” finite element model of a boring bar is utilized to simulate its dynamic response and as controller an adaptive digital controller realized by the feedback filtered-x lms algorithm is used. Control system simulations are presented for the case of broadband excitation.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

active boring bar

active vibration control

finite element modeling

Publikations- och innehållstyp

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