Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment

Lyan-Ywan Lu, Ging Long Lin, Jiun Hung Hung, Yung Tien Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The magnitude and content of an earthquake is usually hard to be predicted precisely. To make seismic isolation systems more adaptive to earthquake motions that may have diverse characteristics, a semi-active isolation system called the "Piezoelectric Sliding Isolation System (PSIS)" is introduced in this study for the seismic protection of precision equipment. The PSIS system is composed of a sliding isolation platform and a piezoelectric friction damper (PFD). Depending on the feedback signal of the PSIS response, the friction force of the PFD can be regulated on-line by an embedded piezoelectric actuator. As a result, the seismic response of the PSIS can be effectively controlled and mitigated. The feasibility of the PSIS is verified dynamically via a shaking table test in this study, and the comparison between the experimental and theoretical results has shown the good consistency. The experimental results also demonstrate that, the PSIS is able to substantially suppress both the displacement and acceleration responses in an earthquake with either near-fault or far-field characteristics. The study also shows that, even though the semi-active PSIS system can only provide a passive control force, it is able to achieve the same level of control performance as an actively controlled isolation system, which shares the same optimal feedback gain as that of the PSIS.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011
EditorsG. Lombaert, G. Muller, G. De Roeck, G. Degrande
PublisherUniversity of Southampton, Institute of Sound Vibration and Research
Pages1962-1967
Number of pages6
ISBN (Electronic)9789076019314
Publication statusPublished - 2011 Jan 1
Event8th International Conference on Structural Dynamics, EURODYN 2011 - Leuven, Belgium
Duration: 2011 Jul 42011 Jul 6

Publication series

NameProceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011

Other

Other8th International Conference on Structural Dynamics, EURODYN 2011
CountryBelgium
CityLeuven
Period11-07-0411-07-06

Fingerprint

Earthquakes
Friction
Feedback
Piezoelectric actuators
Adaptive systems
Force control
Seismic response

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Computer Networks and Communications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Lu, L-Y., Lin, G. L., Hung, J. H., & Liu, Y. T. (2011). Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment. In G. Lombaert, G. Muller, G. De Roeck, & G. Degrande (Eds.), Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011 (pp. 1962-1967). (Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011). University of Southampton, Institute of Sound Vibration and Research.
Lu, Lyan-Ywan ; Lin, Ging Long ; Hung, Jiun Hung ; Liu, Yung Tien. / Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment. Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011. editor / G. Lombaert ; G. Muller ; G. De Roeck ; G. Degrande. University of Southampton, Institute of Sound Vibration and Research, 2011. pp. 1962-1967 (Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011).
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Lu, L-Y, Lin, GL, Hung, JH & Liu, YT 2011, Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment. in G Lombaert, G Muller, G De Roeck & G Degrande (eds), Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011. Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011, University of Southampton, Institute of Sound Vibration and Research, pp. 1962-1967, 8th International Conference on Structural Dynamics, EURODYN 2011, Leuven, Belgium, 11-07-04.

Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment. / Lu, Lyan-Ywan; Lin, Ging Long; Hung, Jiun Hung; Liu, Yung Tien.

Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011. ed. / G. Lombaert; G. Muller; G. De Roeck; G. Degrande. University of Southampton, Institute of Sound Vibration and Research, 2011. p. 1962-1967 (Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - The magnitude and content of an earthquake is usually hard to be predicted precisely. To make seismic isolation systems more adaptive to earthquake motions that may have diverse characteristics, a semi-active isolation system called the "Piezoelectric Sliding Isolation System (PSIS)" is introduced in this study for the seismic protection of precision equipment. The PSIS system is composed of a sliding isolation platform and a piezoelectric friction damper (PFD). Depending on the feedback signal of the PSIS response, the friction force of the PFD can be regulated on-line by an embedded piezoelectric actuator. As a result, the seismic response of the PSIS can be effectively controlled and mitigated. The feasibility of the PSIS is verified dynamically via a shaking table test in this study, and the comparison between the experimental and theoretical results has shown the good consistency. The experimental results also demonstrate that, the PSIS is able to substantially suppress both the displacement and acceleration responses in an earthquake with either near-fault or far-field characteristics. The study also shows that, even though the semi-active PSIS system can only provide a passive control force, it is able to achieve the same level of control performance as an actively controlled isolation system, which shares the same optimal feedback gain as that of the PSIS.

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Lu L-Y, Lin GL, Hung JH, Liu YT. Experimental study of a piezoelectric sliding isolation system for seismic protection of equipment. In Lombaert G, Muller G, De Roeck G, Degrande G, editors, Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011. University of Southampton, Institute of Sound Vibration and Research. 2011. p. 1962-1967. (Proceedings of the 8th International Conference on Structural Dynamics, EURODYN 2011).