This document summarizes a research paper about using smart magnetorheological (MR) dampers to control chatter vibration in machine tools. The paper presents a mechatronic model that integrates an MR damper into a machine tool to variably control its stiffness and damping. A novel chatter detection index is developed to detect chatter from vibration signals. A fuzzy controller then determines the optimal voltage to supply to the MR damper based on the vibration measurements in order to improve stability and suppress chatter during machining processes. The numerical analysis results demonstrated significant improvements in dynamic stability and an ability to detect and reduce chatter vibration.

1. Semi­active fuzzy control of machine tool
chatter vibration using smart MR dampers
The International Journal of Advanced Manufacturing Technology
Davood Sajedi Pour, Saeed Behbahani
ORIGINAL ARTICLE
First Online: 25 July 2015
DOI (Digital Object Identifier): 10.1007/s00170-015-7503-6
Cite this article as:
Sajedi Pour, D. & Behbahani, S. Int J Adv Manuf Technol (2016) 83: 421.
doi:10.1007/s00170-015-7503-6
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Abstract
Dynamic stability of cutting processes against chatter vibration is a key
requirement for high­speed machining and high material removal rate with high­
quality surface finish. In the present work, the stiffness and damping of the
machine tool are varied semi­actively by means of a magnetorheological (MR)
damper to suppress chatter. An integrated mechatronic model is presented for
the chatter analysis of a machine tool equipped with MR damper. Since the
structure becomes nonlinear in the presence of MR damper, a novel chatter
detection index (CDI) is developed to detect chatter from time­domain vibration
signals. Subsequently, a fuzzy controller is designed to compute the best supply
voltage to MR damper based on the measured vibration signals. The obtained
results from the numerical analysis of the integrated model are encouraging,
demonstrating a significant improvement in the dynamic stability of machining
process, as well as the ability of detecting and suppressing chatter.
Keywords
Magnetorheological damper Chatter Semi­active Fuzzy control Lathe
machine
March 2016, Volume 83, Issue 1, pp 421–428
Authors Authors and ailiations
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