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Proceedings Paper

Semi-active control of torsionally responsive structures
Author(s): David A. Shook; Paul N. Roschke; Pei-Yang Lin; Chin-Hsiung Loh
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Paper Abstract

The mitigation of torsional responses in structures using semi-active devices is pursued in the current study. Multiple magnetorheological (MR) dampers are employed for real-time control of response of a benchmark structure to earthquake excitations. MR damper resistance levels are intelligently managed by a global fuzzy logic controller (FLC). The FLC is generated using a controlled-elitist genetic algorithm (GA). Development of an optimal FLC is expedited by a discretized search space of fuzzy logic membership functions. To enable robust control a training excitation is created using the RSPMatch2005 algorithm which modifies historic ground records in the time-domain by wavelet operations. Both numerical and large-scale experimental efforts are undertaken to validate the proposed control system. Results show the GA-optimized FLC performs superior to passive operation in 42% of considered cases.

Paper Details

Date Published: 18 April 2008
PDF: 12 pages
Proc. SPIE 6928, Active and Passive Smart Structures and Integrated Systems 2008, 69281E (18 April 2008); doi: 10.1117/12.776803
Show Author Affiliations
David A. Shook, Skidmore, Owings, and Merrill (United States)
Paul N. Roschke, Texas A&M Univ. (United States)
Pei-Yang Lin, National Ctr. for Research on Earthquake Engineering (Taiwan)
Chin-Hsiung Loh, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6928:
Active and Passive Smart Structures and Integrated Systems 2008
Mehdi Ahmadian, Editor(s)

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