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Wednesday, July 10 • 17:10 - 17:30
ACTIVE CONTROL USING DYNAMIC-RATE SAMPLING

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Variable-rate sampling is accepted as a good method for improving the measurements of sound and vibration produced by rotating machinery often referred to as order based sampling. Adaptive active control of the sound and vibration of this same machinery, though, is commonly performed with fixed-rate sampling and processing. During instances where tonal content being controlled is varying in frequency, a delay in convergence results from the mismatch created between the control filter sampling rate and the changing center frequency of interest. This mismatch can be eliminated with dynamic sampling triggered by a tachometer signal. A comparison of fixed- and dynamic-rate active noise control is presented to compare convergence, tracking performance, and computational load for an active noise control application.

Moderators
LH

Lars Håkansson

professor, Linnaeus University
CH

Claes Hedberg

Professor, Blekinge Institute of Technology

Authors

Wednesday July 10, 2019 17:10 - 17:30 EDT
Westmount 2
  T01 Ac. meas. & instrum., SS01 Snd & vibr measur & analys