Experimental Validation of a Generalized Procedure for MDOF Real-Time Hybrid Simulation
Publication: Journal of Engineering Mechanics
Volume 140, Issue 4
Abstract
Real-time hybrid simulation (RTHS) has increasingly been recognized as a powerful methodology to evaluate structural components and systems under realistic operating conditions. The concept of RTHS combines the advantages of both numerical analysis and physical laboratory testing. Furthermore, the enforced real-time execution condition enables testing of rate-dependent components. One of the most important challenges in RTHS is to achieve synchronized boundary conditions between computational and physical substructures. The level of synchronization, i.e., actuators tracking performance, largely governs RTHS test stability and accuracy. The objective of this study is to propose and validate a generalized procedure for multiple-degree-of-freedom (MDOF) RTHS. A loop-shaping robust control design strategy is proposed to control the motion of the actuators. Validation experiments are performed successfully, including the challenges of multiple actuators dynamically coupled through a continuum steel moment resisting frame (MRF) specimen. The resulting framework is further utilized to evaluate the performance of a magnetorheological (MR) damper in its effectiveness to mitigate structural vibration when the structure is subjected to dynamic disturbances, e.g., earthquakes.
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Acknowledgments
The authors acknowledge support from the National Science Foundation (contract/grant Nos. CNS-1028668 and CMMI-1011534) and from a Purdue University Cyber Center Special Incentive Research Grant.
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 140 • Issue 4 • April 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 8, 2013
Accepted: Jul 19, 2013
Published online: Jul 25, 2013
Published in print: Apr 1, 2014
Discussion open until: May 30, 2014
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