Evaluating Damping Performance of a Semi-Active Controlled Base-Isolation System by the Damping Factor Based on ARX Model Estimation

Abstract

The application of semi-active control is expected to reduce the response displacement of the isolation layer effectively without increasing the floor response acceleration of the superstructure. For this study, the real-time hybrid simulation (RTHS) of a semi-active base-isolation system installed with a magnetorheological fluid damper (MR damper) is conducted to verify the effectiveness of semi-active control, and the response reduction effects using semi-active control systems are evaluated by the damping factor based on the ARX model. The results of RTHS indicated that semi-active control exhibited high acceleration reduction effects, and the damping factor based on the ARX model enabled the evaluation of differences in control effects among several control algorithms.