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Proceedings Paper

In-process machine tool vibration cancellation using PMN actuators
Author(s): Zelalem Eshete; Guangming Zhang
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Paper Abstract

At present, the machine tool technology in the US is not in the state-of-the-art of leading international competitors. Conventional machine tools under use are being pushed into their machining accuracy limits. There is a pressing need calling for revitalizing the machine tool industry. This paper presents, a mechatronic system developed for reducing tool vibration during machining. It consists of electrical and mechanical components, and is realized by placing electrically driven electrostrictive actuators in a specially designed tool post mechanical structure. The linear neural network controller, namely, digital filters, are implemented using a signal processing board. The experimental investigation is conducted in two stages. In the first stage, a test bed is established to use an electro-magnetic shaker to resemble the excitation of cutting force acting on the tool. In the second stage, experiments were conducted using a lathe on the shop floor. In-process vibration cancellation was observed. In the laboratory experiment, a percent reduction in the 90 percent was possible using a feedforward scheme. The improvement in surface roughness during the turning operation was confirmed from measurements of surface roughness profiles.

Paper Details

Date Published: 19 December 1996
PDF: 8 pages
Proc. SPIE 2911, Advanced Sensor and Control-System Interface, (19 December 1996); doi: 10.1117/12.262499
Show Author Affiliations
Zelalem Eshete, Univ. of Maryland/College Park (United States)
Guangming Zhang, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 2911:
Advanced Sensor and Control-System Interface
Bartholomew O. Nnaji, Editor(s)

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