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RESEARCH PAPERS: Mechanical Signature Analysis

Determination of Modal Deformations by Means of In Situ Accelerations

[+] Author and Article Information
S. Braun

Technion, Israel Institute of Technology, Haifa 32000, Israel

J. Levran

Armament Development Authorities, Haifa, Israel

J. Vib., Acoust., Stress, and Reliab 108(1), 32-38 (Jan 01, 1986) (7 pages) doi:10.1115/1.3269300 History: Received June 11, 1985; Online November 23, 2009

Abstract

Described is a method of extracting modal deflection patterns by means of acceleration measurements only. This enables the testing of systems/machines under normal operating conditions with many potential advantages. A single inertance measurement can be used in conjunction with these results to estimate true modal parameters. The method is demonstrated for a drill under machining conditions. Error associated with the proposed method are discussed, and estimated for the given example.

Copyright © 1986 by ASME
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