Structural Health Monitoring Using Smart Sensors - ideals ...

measured data (outputs only)
data collection
auto and cross-correlation functions
NExT & ERA
modal parameters
i i i
(Y or l , y )
i
d
i
Ydor y normalized d to
have a unit magnitude
d
d
data aggregration
for community i
undamaged normalization
i i
constants D or a (eq. 5.1)
g
potentially damaged
flexibility matrix F d
F = F - F
D u d
singular value decomposition of F D
damage locating vectors (DLVs)
obtain normalized cumulative
stress under DLVs
damage in community i?
yes
no send an "ok" signal
back to central station
decision making
involving adjacent
communities
part of adjacent communities?
yes
identified as damaged candidates
in all of these communities?
no
retake data, and reconduct data
aggregation and decision making
no
community i reports
damage information
yes report damage
information
Figure 6.1. DCS logic (Gao, 2005).
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