Feedback delays for vibration mitigation and external disturbance rejection at the microscale

Yousef Qaroush, Mohammed F. Daqaq, Reza Saeidpourazar, Joshua Tarbutton, Nader Jalili

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This effort discusses the implementation of delayed-feedback algorithms as effective mechanisms for vibration mitigation at the microscale. A delayed velocity-feedback algorithm is considered and employed to mitigate the flexural vibrations of a microcantilever beam. The linear stability of the closed-loop unforced system is assessed to determine the gain-delay combinations wherein the fixed points of the system are locally-asymptotically stable. The method of multiple scales is then implemented to analyze the steady-state forced response of the closed-loop dynamics. Theoretical results demonstrate that inherent system delays can be easily augmented into a larger delay period that can be used to stabilize the system dynamics and enhance the damping characteristics of the response. The proposed concept is implemented experimentally on a microcantilever sensor. The feedback algorithm is shown to have excellent performance in mitigating the ffects of external disturbances and periodic excitations.

Original languageEnglish (US)
Title of host publication50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
StatePublished - 2009
Event50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Palm Springs, CA, United States
Duration: May 4 2009May 7 2009

Publication series

NameCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
ISSN (Print)0273-4508

Other

Other50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
CountryUnited States
CityPalm Springs, CA
Period5/4/095/7/09

Keywords

  • Delayed-feedback control
  • Method of multiple scales
  • Microcantilever beam
  • Stability pockets

ASJC Scopus subject areas

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

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  • Cite this

    Qaroush, Y., Daqaq, M. F., Saeidpourazar, R., Tarbutton, J., & Jalili, N. (2009). Feedback delays for vibration mitigation and external disturbance rejection at the microscale. In 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference [2009-2661] (Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference).