Equivalent force control method for generalized real‐time substructure testing with implicit integration |
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| Authors: | Bin Wu Qianying Wang P Benson Shing Jinping Ou |
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| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Department of Structural Engineering, University of California at San Diego, CA 92093‐0085, U.S.A.;3. Dalian University of Technology, Dalian 116024, China |
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| Abstract: | 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. |
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| Keywords: | real‐time tests substructure tests pseudodynamic tests hybrid simulation implicit integration equivalent force control |
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