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Structural Engineering and Mechanics Volume 12, Number 6, December 2001 , pages 633-656 DOI: https://doi.org/10.12989/sem.2001.12.6.633 |
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Seismic test of modal control with direct output teedback for building structures |
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Lyan-Ywan Lu(Taiwan)
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| Abstract | ||
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In this paper, modal control with direct output feedback is formulated in a systematic manner for easy implementation. Its application to the seismic protection of structural systems is verified by a shaking table test, which involves a full-scale building model and an active bracing system as the control device. Two modal control cases, namely, one full-state feedback and one direct output feedback control were tested and compared. The experimental result shows that in mitigating the seismic response of building structures, modal control with direct output feedback can be as effective and efficient as that with full-state feedback control. For practical concerns, the control performance of the proposed method in the presence of sensor noise and stiffness modeling error was also investigated. The numerical result shows that although the control force may be increased, the maximum floor displacements of the controlled structure are very insensitive to sensor noise and modeling error. | ||
| Key Words | ||
| active structural control; modal control; direct output feedback; seismic protection; active bracing system; shaking table test. | ||
| Address | ||
| Lyan-Ywan Lu, Department of Construction Engineering, National Kaohsiung First University of Science and Technology, University Road, Yenchao, Kaohsiung 824, Taiwan | ||