Robust and high-performance control of shake tables

A. Najafi, B. F. Spencer

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

Abstract

Shake tables are used to study the behavior of structures under earthquakes. However, the inherent dynamic properties of the shake tables add unwanted behaviors to the desired earthquake time history. Systematic control techniques are thus adopted to compensate for the unwanted behavior by manipulating the signal sent to the shake table. Model-based control methods have proven useful for compensation of structure and shake table dynamics. However, increases in the control authority of model-based techniques tend to destablize the shake table. These methods lack predictability in terms of both performance and stability. In this paper, a Modified Model-based Control technique is introduced with improved performance and stability robustness. A numerical example is analyzed using closed-loop sensitivity functions to illustrate performance. Algebraic norms are also used to illustrate the stability-guarantee property of this new control technique. An acceleration tracking numerical simulation is conducted and the superior performance and stability properties of the new controller are demonstrated and compared to traditional techniques.

Original languageEnglish (US)
Title of host publication9th International Conference on Structural Health Monitoring of Intelligent Infrastructure
Subtitle of host publicationTransferring Research into Practice, SHMII 2019 - Conference Proceedings
EditorsGenda Chen, Sreenivas Alampalli
PublisherInternational Society for Structural Health Monitoring of Intelligent Infrastructure, ISHMII
Pages156-161
Number of pages6
ISBN (Electronic)9780000000002
StatePublished - 2019
Event9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - St. Louis, United States
Duration: Aug 4 2019Aug 7 2019

Publication series

Name9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings
Volume1

Conference

Conference9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019
CountryUnited States
CitySt. Louis
Period8/4/198/7/19

ASJC Scopus subject areas

  • Artificial Intelligence
  • Civil and Structural Engineering
  • Building and Construction

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