RESEARCH PAPERS: Mechanical Signature Analysis

Multichannel Structural Inverse Filtering

[+] Author and Article Information
R. E. Powell

Cambridge Collaborative, Inc., Cambridge, Mass.

W. Seering

Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Mass.

J. Vib., Acoust., Stress, and Reliab 106(1), 22-28 (Jan 01, 1984) (7 pages) doi:10.1115/1.3269147 History: Received July 13, 1983; Online November 23, 2009


A technique has been implemented for predicting the multiple input force time histories acting on a machinery component through the use of multiple vibration measurements and a stored matrix of mechanical frequency response functions. A least squares pseudo-inverse of this transfer matrix is computed in the frequency domain using the singular value decomposition. This decomposition is used to condition the pseudo-inverse against potential singularities caused by uncertainties in the data. The constructed inverse filter is capable of separating multiple input force signals even when the vibration signals contain reverberated information from the inputs in overlapping frequency ranges. The technique has been successfully applied to a flat plate system with two inputs and up to four vibration measurements. Guidelines are suggested for reducing the effects of measurement inaccuracies on the force predictions.

Copyright © 1984 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In