Optimum fuzzy sliding mode semi-active control of structures subjected to earthquakes

Article type: Research Article

Authors: Dounis, A.I. | King, R.E.

Affiliations: Department of Automation, Technological Educational Institute of Piraeus, Piraeus 12244, Greece. E-mail: aidounis@otenet.gr | Department of Electrical & Computer Engineering, University of Patras, 26500 Patras, Greece. E-mail: reking@ee.upatras.gr

Note: [] Corresponding author

Abstract: This paper presents a design procedure for a class of optimized semi-active controllers for structures subjected to seismic activity. The structure is controlled through a single force applied to a controllable electromagnetic damper placed on the first storey of the structure. The restraining control force is computed in real-time using a fuzzy sliding mode control algorithm. The parameters of the controller are optimized using a global stochastic search based on the Metropolis simulated annealing algorithm. The resultant disturbance mitigation of the proposed controller has been verified through extensive simulation of a multi-storey structure using realistic earthquake data. In this paper a new form of semi-active controller is proposed. The proposed fuzzy sliding mode controller possesses three parameters whose optimum values are computed using simulated annealing. Through simulation of a six storey structure subjected to known earthquake tremors it is shown that the performance of the proposed controller is superior to other semi-active control scheme that have been proposed thus far.

Keywords: fuzzy sliding mode control, semi-active devices, simulated annealing, earthquakes, structure control, magnetorheological and electrorheological dampers

Journal: Journal of Intelligent & Fuzzy Systems, vol. 14, no. 1, pp. 37-47, 2003