DIFFERENT TYPE CONTROLLERS DESIGN FOR STRUCTURES UNDER SEISMIC EXCITATION

10th International Multidisciplinary Scientific GeoConference - SGEM2010, www.sgem.org, SGEM2010 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 20-26, 2010, Vol. 1, 769-776 pp

ABSTRACT

In this study, linear quadratic regulator (LQR) and fuzzy logic (FL) controller are
designed for displacement control of elastic structure under seismic excitation.
MATLAB®/SIMULINK toolbox is used for the mathematical modelling of the system
and controllers design. Controllers are applied to the structure, components of which
are assumed that they have standard stiffness and damping coefficient, to suppress
seismical vibration. A hydraulic actuator is used as the control device. Dynamic of the
actuators to create the control force to be applied to the structure, involved in the
equation of motion of the controlled structure.The equation of motion of the system
obtained in state-space model in continuous time is converted to discrete time. The
equation of motion of a real building model structure is solved and simulated by using
the data of a known earthquake having occurred ago. Numerical simulations and
vibration results of the LQR and FL controlled and uncontrolled structure are presented
in the form of graphics.

Keywords: Seismic excitation, LQR controller, fuzzy logic controller, hydraulic actuator, simulation.