Delaying tool chatter in turning with a two-link robotic arm

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Ozer, Abdullah, Semercigil, Eren, Kumar, R. Prasanth and Yowat, Pulas (2012) Delaying tool chatter in turning with a two-link robotic arm. Journal of Sound and Vibration, 332 (6). pp. 1405-1417. ISSN 0022-460X


Chatter leaves a rough machined surface, accelerates wear of the cutter and creates unacceptably loud noise levels. A conventional approach to suppress chatter is to slow the material removal rate. Such an action is usually successful to avoid chatter, but causes increased production time and cost. Therefore, it is desirable to maintain a reasonably fast rate of production and employ a chatter control measure. In this research, a semi-active parameter control technique is investigated numerically during a robotic turning process. Investigations have been performed on a two-link robotic arm model. The control of chatter has been achieved by varying the joint stiffness in a synchronized mode with the spindle speed. Stability lobe diagrams have been compared for controlled and uncontrolled cases. Simulation results showed that significant improvements can be achieved by varying the joint stiffness of robotic structures. The proposed method is stable, effective and requires no additional hardware to implement at the actuated joints of robots.

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Item type Article
DOI 10.1016/j.jsv.2012.08.006
Official URL
Subjects Historical > FOR Classification > 0906 Electrical and Electronic Engineering
Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Keywords ResPubID25454, ResPubID26677, chatter control, robotic structures, parameter control technique
Citations in Scopus 23 - View on Scopus
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