Discrete time variable structure control with fuzzy adaptive regulation of reaching law for building structure

Zhijun Li, Zichen Deng

Research output: Contribution to journalArticlepeer-review

Abstract

Existing discrete time variable structure control methods for reducing seismological response of building structure, such as those of Cai et al[9] and Zhao et al[10], suffer, in our opinion, the shortcoming that it is almost very difficult to avoid excessive chattering effect. Therefore, based on the advantages of discrete time variable structure control and fuzzy control, we propose a new discrete time variable structure control method with fuzzy adaptive regulation of reaching law. Such a method can not only reduce seismological response but also avoid undue chattering effect. In the full paper, we explain in detail the application of the discrete time variable structure control method to the control of seismologically excited structural systems. We give numerical simulations for MDOF (Multiple-Degree-of-Freedom) shear building model containing an active brace system. The results of seismological response are shown in Table 2 and Fig.6; they show that, like Refs.9 and 10, seismological responses can be markedly reduced. The results for chattering effect are given in Figs.3 and 5; Fig.3 is for Refs.9 and 10, and Fig.5 is for the discrete time variable structure control method with fuzzy adaptive regulation of reaching law; Fig.5 shows preliminarily that our method can keep the chattering effect sufficiently low but, in this case, Refs.9 and 10 cannot do so.

Original languageEnglish
Pages (from-to)747-751
Number of pages5
JournalXibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
Volume25
Issue number5
StatePublished - Oct 2007

Keywords

  • Building structure
  • Chattering effect
  • Discrete time variable structure control
  • Fuzzy control
  • Reaching law

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