Control of instabilities induced by low-velocity collisions in a vibro-impacting system with friction

Harry Dankowicz, Fredrik Svahn

Research output: Chapter in Book/Report/Conference proceedingChapter


The onset of low-velocity collisions in vibro-impacting systems induces instabilities in the system dynamics that, when not checked, may result in sudden, and unanticipated discontinuous transitions between distinct steady-state responses. This paper illustrates this phenomenology in an example system that includes dry friction. Here, the instability is associated with the zero-velocity contact of an oscillatory unilateral constraint and a stationary mass suspended through a preloaded spring. The analysis summarizes observations on the passive response of the mass under variations in the oscillation amplitude of the constraint. A control strategy is subsequently shown to successfully suppress the instability. The paper concludes with suggestions for applications of this phenomenology as well as a description of similar observation in mechanical systems with or without friction and with rigid as well as compliant contact.

Original languageEnglish (US)
Title of host publicationVibro-Impact Dynamics of Ocean Systems and Related Problems
EditorsRaouf A. Ibrahim, Masaaki Okuma, Raouf A. I Ibrahim, Vladimir I. Babitsky, Masaaki Okuma, Babitsky Babitsky
Number of pages12
StatePublished - Dec 1 2009

Publication series

NameLecture Notes in Applied and Computational Mechanics
ISSN (Print)1613-7736

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computational Theory and Mathematics


Dive into the research topics of 'Control of instabilities induced by low-velocity collisions in a vibro-impacting system with friction'. Together they form a unique fingerprint.

Cite this