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Stability and accuracy analysis of the central difference method for real‐time substructure testing
Author(s) -
Wu B.,
Bao H.,
Ou J.,
Tian S.
Publication year - 2005
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.451
Subject(s) - substructure , displacement (psychology) , stability (learning theory) , significant difference , transformation (genetics) , structural engineering , computer science , mathematics , engineering , control theory (sociology) , statistics , artificial intelligence , psychology , control (management) , machine learning , psychotherapist , biochemistry , chemistry , gene
The central difference method (CDM) that is explicit for pseudo‐dynamic testing is also believed to be explicit for real‐time substructure testing (RST). However, to obtain the correct velocity dependent restoring force of the physical substructure being tested, the target velocity is required to be calculated as well as the displacement. The standard CDM provides only explicit target displacement but not explicit target velocity. This paper investigates the required modification of the standard central difference method when applied to RST and analyzes the stability and accuracy of the modified CDM for RST. Copyright © 2005 John Wiley & Sons, Ltd.