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Identification of Mass Distribution of Nominally Identical Microresonator Arrays in the Presence of Measurement Noise

[+] Author Affiliations
Teresa J. Ryan, John A. Judge, Joseph F. Vignola

The Catholic University of America, Washington, DC

Paper No. DETC2011-48562, pp. 227-233; 7 pages
doi:10.1115/DETC2011-48562
From:
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7: 5th International Conference on Micro- and Nanosystems; 8th International Conference on Design and Design Education; 21st Reliability, Stress Analysis, and Failure Prevention Conference
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5484-6
  • Copyright © 2011 by ASME

abstract

The use of micro- and nanoscale mechanical resonators for mass detection is a maturing concept. Recently, researchers have begun to consider coupled arrays of resonators and the notion of examining system eigenmodes as well as resonant frequencies to extract information about the system. This paper describes a method for the use of measured eigenmodes of a linear chain of nominally identical oscillators to identify the masses of the individual oscillators. This allows characterization of initial mass variation as well as changes due to the presence of one or more target analytes. This work uses numerical simulation to explore the sensitivity of this method to measurement noise. Mass identification is shown to be more accurate on oscillators with significant vibration amplitude in a given eigenmode. We discuss various averaging techniques for combining results from multiple eigenmodes to reduce sensitivity to noise.

Copyright © 2011 by ASME

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