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- W4362660108 abstract "Existing studies involving shake table real-time hybrid testing (ST-RTHT) mainly use displacement-based control methods, which generally have good tracking for displacement but their acceleration tracking may be unsatisfactory. Although three-variable control has been introduced in some cases to improve the tracking performance, this approach cannot consider the influence of system nonlinearities and uncertainties. To expand the applicability of sliding mode control theory in shake table, in this study, a sliding mode acceleration control (SMAC) method is presented to overcome the drawback of traditional sliding mode force control (SMFC), and the information of the force applied by structure to shake table and the unmodeled complex nonlinear force is not required. Based on the proposed control method, the framework of ST-RTHT for shear buildings is developed. In the test system, an inner-loop controller composed of feedforward and feedback controls is designed based on the system transfer function, while the proposed SMAC that has asymptotic stability is integrated as an outer-loop controller. Finally, ST-RTHT for a two-story structure is successfully implemented to demonstrate the effectiveness of SMAC. Experimental results show that SMAC can achieve better synchronization of the boundary conditions between the physical and numerical substructures than SMFC, and thus improves the stability of ST-RTHT and accuracy of structural response reproduction." @default.
- W4362660108 created "2023-04-07" @default.
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- W4362660108 date "2023-06-01" @default.
- W4362660108 modified "2023-09-30" @default.
- W4362660108 title "Shake table real-time hybrid testing for shear buildings based on sliding mode acceleration control method" @default.
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- W4362660108 doi "https://doi.org/10.1016/j.istruc.2023.03.140" @default.
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