Suppression of regenerative chatter via impedance modulation

Daniel J. Segalman, Eric A. Butcher

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

A new technique for the suppression of machine tool chatter in turning based on modulation of the system impedance is analyzed. The modulation frequency is selected as half the spindle frequency. Using the method of harmonic balance and a numerical root finding scheme on the transcendental characteristic equation, stability diagrams are computed for a variety of modulation amplitudes. The stability boundaries are verified by using the Nyquist stability criterion and growth exponents computed from transient simulations of the vibratory response. It is shown in this way that the impedance modulation technique successfully scrambles the regenerative process that leads to chatter and widens the stability region (by increasing the maximum allowed cutting depth), particularly for low values of the spindle speed.

Original languageEnglish (US)
Pages (from-to)243-256
Number of pages14
JournalJVC/Journal of Vibration and Control
Volume6
Issue number2
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

Keywords

  • Chatter
  • Impedance modulation
  • Regenerative vibration
  • Time-periodic differential-difference equation

ASJC Scopus subject areas

  • Automotive Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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