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Title: Noise elimination algorithm for modal analysis

Modal analysis is an ongoing interdisciplinary physical issue. Modal parameters estimation is applied to determine the dynamic characteristics of structures under vibration excitation. Modal analysis is more challenging for the measured vibration response signals are contaminated with noise. This study develops a mathematical algorithm of structured low rank approximation combined with the complex exponential method to estimate the modal parameters. Physical experiments using a steel cantilever beam with ten accelerometers mounted, excited by an impulse load, demonstrate that this method can significantly eliminate noise from measured signals and accurately identify the modal frequencies and damping ratios. This study provides a fundamental mechanism of noise elimination using structured low rank approximation in physical fields.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Naval Architecture and Ocean Engineering, China University of Petroleum (East China), Qingdao 266580 (China)
  2. Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071 (China)
  3. The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061 (China)
Publication Date:
OSTI Identifier:
22486374
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ACCELEROMETERS; ALGORITHMS; APPROXIMATIONS; BEAMS; DAMPING; EXCITATION; NOISE; PULSES; SIGNALS