Vibration cancellation of resonance shaking table via SAMD with adaptive digital filter

Abstract

In order to confirm the earthquake proof safety of the nuclear power facilities, the resonance shaking table which realize the maximum acceleration 20G have been developed. Because of generating a large acceleration, the resonance shaking table have caused environmental vibration problem. As a countermeasure, the Semi Active Mass Damper (SAMD) has been developed. However, in the conventional controller design of SAMD, the parameters of the controller have to be determined by trial and error in order to get satisfactory results. Therefore, if the experimental condition is changed, it is necessary to perform trial and error again. To remove this complex procedure, an adaptive digital filter called Filtered-X is adopted to the controller design of SAMD. In this study, shaking tests were done using the resonance shaking table under 20G acceleration, then effectiveness of the proposed adaptive controller is shown that the site boundary vibration level was lower than the regulation value , and also better performance was obtained compared to the conventional method.