Synchronous Tracking Control Strategy of Dual-Actuator Excited Shaking Table

Abstract

The electro-hydraulic shaking table in the laboratory is specifically designed to replicate the desired earthquake ground motion for engineering structure, requiring precise synchronization of its dual exciters and accurate tracking of the target signal. The system faces challenges such as control errors and actuator asynchronization due to the nonlinear effects of the shaking table system and the structural model. To address the issues of inadequate tracking and synchronization accuracy, this study introduces a novel strategy for synchronizing the motion of the exciters and establishes a fuzzy logic controller (FLC) for the shaking table to minimize synchronization errors of dual exciters. Furthermore, an adaptive inverse controller (AIC) is developed for the exciters to enhance tracking accuracy. By combining FLC and AIC, this approach leverages the strengths of both control techniques to achieve superior control performance. The proposed control is implemented through MATLAB\Simulink, and numerical analyses are conducted under various conditions. The numerical results demonstrate the effectiveness and feasibility of the proposed control strategy.