Combined effects of sampling and dry friction on position control

Csaba Budai, László L. Kovács, József Kövecses, G. Stépán

Research output: Contribution to journalArticle

Abstract

This paper studies the combined effect of sampling and dry friction on the dynamics of mechanical systems subjected to position control using discrete-time state feedback. This paper aims to highlight that even in case of a single degree-of-freedom mechanical subsystem, the controlled system cannot be characterized by a model with a single dominant frequency and some of the upper harmonics become relevant resulting multi-frequency vibrations. The presented stability analysis of the frictionless system gives insight into this intricate dynamics of sampled-data systems. The numerical simulation results show that the presence of dry friction can stabilize an otherwise unstable motion due to the effect of sampling. The effect of dry friction results that decreasing vibrations occur with concave envelope, but it makes the dynamics dependent on the initial conditions.

Original languageEnglish
JournalNonlinear Dynamics
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Dry Friction
Position Control
Position control
Friction
Sampling
Vibration
Sampled-data Systems
State feedback
State Feedback
Mechanical Systems
Envelope
Stability Analysis
Subsystem
Discrete-time
Initial conditions
Harmonic
Unstable
Degree of freedom
Numerical Simulation
Motion

Keywords

  • Coulomb friction
  • Digital effects
  • Higher harmonics
  • Motion control
  • Positioning

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Combined effects of sampling and dry friction on position control. / Budai, Csaba; Kovács, László L.; Kövecses, József; Stépán, G.

In: Nonlinear Dynamics, 01.01.2019.

Research output: Contribution to journalArticle

Budai, Csaba ; Kovács, László L. ; Kövecses, József ; Stépán, G. / Combined effects of sampling and dry friction on position control. In: Nonlinear Dynamics. 2019.
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