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Sliding Mode Control of the Turning Process for Eliminating Regenerative Chatter in the Presence of Paremetric Uncertainties

[+] Author Affiliations
H. Moradi, M. R. Movahhedy, G. R. Vosoughi

Sharif University of Technology, Tehran, Iran

Paper No. IMECE2007-43029, pp. 449-456; 8 pages
doi:10.1115/IMECE2007-43029
From:
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 3: Design and Manufacturing
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4297-5 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME

abstract

Chatter suppression is an important topic in any type of machining process. In this paper, orthogonal cutting process is modeled as a single degree of freedom dynamic system. A nonlinear delay differential equation is presented that models flank wear of the tool. Uncertainties in cutting velocity, tool wear size and parameters of the dynamic model are included in the model of cutting process. The force provided by a piezo-actuator is taken as the control input of the system. A sliding mode control scheme is used and an effective control law is derived which suppresses the chatter vibration. Results for two distinct cases of a sharp tool and a worn tool are presented and compared which shows the effectiveness of approach.

Copyright © 2007 by ASME

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