Decentralized control of tall shear structures against sensor failures and uncertainty in earthquake excitations

Document Type : Research Article


1 Structure, Civil engineering faculty, Tabriz university, Tabriz, Iran

2 Tabriz, Tabriz university, civil engineering faculty

3 structure, civil engineering faculty, tabriz university, Tabriz, Iran


This paper uses centralized and decentralized H∞ controllers with static output feedback and linear matrix inequality theory (LMI) as well as a number of changes in LMI variables to retrofit shear structures against a variety of uncertainties. The robustness of this method is evaluated both in centralized and decentralized controls against dynamic forces such as earthquake, uncertainty in earthquake excitation and sensor failure, then structural responses are compared. Finally, the responses of the used control algorithm are compared with the results of the linear quadratic regulator controller (LQR). There are two structural models, including 5 and 20 stories shear structures. The results indicate good robustness of the used control algorithm to the failure of the sensors, the clear difference in response values of the applied algorithm compared to the LQR method, and near results in centralized and decentralized controllers. Although the earthquake excitations uncertainty changes the responses but still controlled responses are clearly less than the uncontrolled responses.


Main Subjects

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