Vibration control of wind-excited tall buildings using sliding mode fuzzy control

Saang Bum Kim, Chung Bang Yun, B F Spencer

Research output: Contribution to journalArticlepeer-review

Abstract

A sliding mode fuzzy control (SMFC) is proposed to design a controller for the third-generation benchmark problem on wind-excited buildings. A distinctive feature in vibration control of large civil infrastructure is the existence of large disturbances, such as wind, earthquake, and sea wave forces. Those disturbances govern the behavior of the structure; however, they cannot be precisely measured, especially for the case of wind excitations. Since the structural accelerations are measured only at a limited number of locations without the measurement of the wind forces, the structure of the conventional control may have the feedback loop only. The general structure of the SMFC, proposed herein, is composed of a compensation part and a convergent part. The compensation part prevents the system from diverging, and the convergent part directs the system to the sliding surface. The compensation part uses not only the structural response measurement but also the disturbance measurement, so the SMFC has a feedback loop and a feedforward loop. To realize the virtual feedforward loop for the wind-induced vibration control, a disturbance estimation filter is introduced. The structure of the filter is constructed based on an autoregressive model for the stochastic wind force. This filter estimates the wind force at each time instance based on the measured structural responses and the stochastic information of the wind force. For verification of the proposed algorithm, numerical simulation is carried out on the benchmark problem for wind-excited buildings. The results indicate that the present control algorithm is efficient for reducing the wind-induced vibration.

Original languageEnglish (US)
Pages (from-to)505-510
Number of pages6
JournalJournal of Engineering Mechanics
Volume130
Issue number4
DOIs
StatePublished - Apr 1 2004

Keywords

  • Buildings
  • Estimation
  • Fuzzy sets
  • Stochastic models
  • Vibration control
  • Wind loads

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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