Performance analysis of a sliding-mode controller for active control of buildings

Abstract

This paper presents the application of a recently proposed sliding mode controller (SMC) tuning algorithm in the active tuned mass damper (ATMD) based vibration control of seismically excited building structures. Both the controller gain and the sliding variable are automatically tuned to attenuate the structure vibrations by minimizing either the top floor displacement or the force applied to the ATMD. This tuning algorithm ensures that the transient response of the building and that of the ATMD are sufficiently fast and damped. Moreover, this algorithm guarantees that the control signals, as well as the displacements and velocities of the building and of the ATMD are within acceptable limits in the bandwidth of the earthquake. Through simulations, the performance of the controller in reducing vibrations in a 30-story building is analyzed.