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Equivalent force control method for generalized real‐time substructure testing with implicit integration
Author(s) -
Wu Bin,
Wang Qianying,
Benson Shing P.,
Ou Jinping
Publication year - 2007
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.674
Subject(s) - substructure , damper , displacement (psychology) , nonlinear system , actuator , control theory (sociology) , magnetorheological fluid , equations of motion , structural engineering , engineering , computer science , control (management) , physics , classical mechanics , artificial intelligence , psychology , quantum mechanics , psychotherapist
This paper presents a new method, called the equivalent force control method, for solving the nonlinear equations of motion in a real‐time substructure test using an implicit time integration algorithm. The method replaces the numerical iteration in implicit integration with a force‐feedback control loop, while displacement control is retained to control the motion of an actuator. The method is formulated in such a way that it represents a unified approach that also encompasses the effective force test method. The accuracy and effectiveness of the method have been demonstrated with numerical simulations of real‐time substructure tests with physical substructures represented by spring and damper elements, respectively. The method has also been validated with actual tests in which a Magnetorheological damper was used as the physical substructure. Copyright © 2007 John Wiley & Sons, Ltd.