Experimental study on utilizing delayed-feedback for ultra-sensitive sensing

Calvin Bradley, Mohammed F. Daqaq, Nader Jalili

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

Abstract

Cantilever-based mass sensors have recently emerged as an effective device for label-free detection of ultra small masses. To improve their sensitivity, a new concept based on delayed-position feedback is proposed and implemented. The proposed approach utilizes feedback delays and inherent system nonlinearities to produce stable limit-cycle oscillations. These limit cycles are generated as a result of the trivial solutions loosing stability via a supercritical Hopf bifurcation. The amplitude of the limit cycles is shown to be ultra sensitive to variations in the sensor natural frequency. This creates an ultra-sensitive cantilever-based mass sensing platform which does not require any changes or additions to the current sensor geometry and can be implemented in real time.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007
Pages1867-1872
Number of pages6
DOIs
StatePublished - 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume9 PART C

Other

OtherASME International Mechanical Engineering Congress and Exposition, IMECE 2007
Country/TerritoryUnited States
CitySeattle, WA
Period11/11/0711/15/07

ASJC Scopus subject areas

  • Engineering(all)
  • Mechanical Engineering

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