Semi-active fuzzy control of cable-stayed bridges using magneto-rheological dampers

Seung Yong Ok, Dong Seok Kim, Kwan Soon Park, Hyun Moo Koh

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

A semi-active fuzzy control technique to enhance the seismic performance of cable-stayed bridges using magneto-rheological (MR) dampers is presented. Conventional semi-active control techniques require a primary controller as a reference to determine the desired control force, and modulate the input voltage of the MR damper by comparing the desired control force and the actual damper force in a secondary controller. The proposed method, however, adopts fuzzy logic instead of primary and secondary controllers. The fuzzy logic directly determines the input voltage of an MR damper from the response of the MR damper. Thus, it provides a simple design procedure and can be easily implemented on a physical structure. The control performance of the proposed fuzzy control technique for the MR damper was evaluated for the benchmark control problem of a seismically-excited cable-stayed bridge. The simulated results show that the proposed semi-active fuzzy control technique can effectively mitigate the seismic response of cable-stayed bridges and successfully enhance the robust performance of the MR damper system.

Original languageEnglish
Pages (from-to)776-788
Number of pages13
JournalEngineering Structures
Volume29
Issue number5
DOIs
StatePublished - May 2007

Keywords

  • Cable-stayed bridge
  • MR damper
  • Seismic response
  • Semi-active fuzzy control

Fingerprint

Dive into the research topics of 'Semi-active fuzzy control of cable-stayed bridges using magneto-rheological dampers'. Together they form a unique fingerprint.

Cite this