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Multiple Degrees of Freedom Positioning Correction for Hybrid Simulation |
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| Authors: | Chia-Ming Chang Thomas M Frankie Billie F Spencer Jr Daniel A Kuchma |
| Institution: | 1. Earthquake Engineering Research and Test Center, Guangzhou University, Guangzhou, Chinachangcm@gzhu.edu.cn;3. Department of Civil and Environmental Engineering, University of Illinois, Illinois, USA;4. Nathan M. and Anne M. Newmark Endowed Chair, Department of Civil and Environmental Engineering, University of Illinois, Illinois, USA |
| Abstract: | This study proposes a high-precision positioning correction method for multiple degree-of-freedom loading units in hybrid simulation. These loading units can impose inaccurate displacements to the specimens due to the elastic deformation at the reaction wall or connections. To compensate for these displacement errors, an online correction method adjusts the displacement command by the difference between the target and achieved displacement. This correction method also accompanies an accurate 6DOF monitoring system to detect the displacement errors. Two examples of hybrid simulation tests are provided to demonstrate the precise displacements attained on the specimens through this control method. |
| Keywords: | Elastic Deformation 6DOF Positioning Control 6DOF Displacement Monitoring Hybrid Simulation Four-span Curved Bridge |