Random errors for an improved frequency response function estimator

The two most popular frequency response function estimators, (H) over cap(1) and (H) over cap(2) give biased estimates when measured input and output signals are contaminated by uncorrelated noises. Recently, an improved frequency response function estimator (H) over cap(s) was proposed for reducing the bias error due to measurement noises, but without any analysis on the random error. In this paper, the random error formula for (H) over cap(s) has been derived for accurate estimation of desired function. The result shows that the random error in the magnitude of (H) over cap(s) is always smaller than that of (H) over cap(2), but larger than that of (H) over cap(1). (C) 1997 Academic Press Limited.
Publisher
ACADEMIC PRESS LTD
Issue Date
1997-03
Language
ENG
Citation

MECHANICAL SYSTEMS AND SIGNAL PROCESSING, v.11, no.2, pp.323 - 326

ISSN
0888-3270
URI
http://hdl.handle.net/10203/71500
Appears in Collection
ME-Journal Papers(저널논문)
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