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RECENT IMPROVEMENTS OF THE ALGORITHM OF MODE ISOLATION Jerry H. Ginsberg and Matthew S. Allen
 

Summary: RECENT IMPROVEMENTS OF THE ALGORITHM OF MODE ISOLATION
Jerry H. Ginsberg and Matthew S. Allen
The Woodruff School of Mechanical Engineering
Georgia Institute of Technology Atlanta, GA 30332-0405
jerry.ginsberg@me.gatech.edu
ABSTRACT
The Algorithm of Mode Isolation (AMI) identifies the
natural frequencies, modal damping ratios, and mode vec-
tors of a system by processing complex frequency response
data. It uses an iterative procedure based on the fact that
a general frequency response function is a superposition of
modal contributions. The iterations focus successively on
a single mode. The mode that is in focus is isolated by
subtracting the other modal contributions using prior es-
timates of their modal properties. This process leads to
a self-contained identification of the number of modes that
participate in any frequency band, whereas other techniques
require a priori guesses. This paper describes modifications
intended to improve AMI's accuracy and reduce its compu-
tational effort. These involve the use of a new linear least

  

Source: Allen, Matthew S. - Department of Engineering Physics, University of Wisconsin at Madison

 

Collections: Engineering