供試体反力を考慮した振動台制御（振動台加速度制御を目的とした２自由度制御設計）

概要

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When carrying out seismic performance examination on a structure by using a shaking table, it is important to reproduce the acceleration faithfully. In the conventional method, we transformed the acceleration wave into a displacement wave and used a hydraulic actuator for displacement control. However, this method had several disadvantages related to disturbance rejection, tracking performance, and stability. In this study, we have developed a full-closed compensation, in which the shaking-table acceleration is assumed the feedback signal for the acceleration wave of the reference signal. Also we adopt the dual model matching (DMM) control technique in order to design a controller. To confirm the disturbance rejection performance and to investigate the effect of enhancing the reproducibility of the shaking-target waveform by DMM control, we perform an experiment using a one-degree-of-freedom specimen placed on a shaking table driven by a hydraulic actuator.