抄録
A hybrid experimental method, in which an actuator excited vibration experiment and a response analysis performed by a computer are on-line combined and simultaneously conducted, is being developed as a new seismic experimental method for structural systems. It is necessary to conduct a hybrid experiment in real time so that the dynamic characteristics of the structure under experiment can be considered in the response calculation. We developed a real-time hybrid experimental system with compensation of actuator response delay, which is equivalent to negative damping in the system. In this report, the developed system was used in experiments on a multiple-degree-of-freedom (MDOF) structural system. First, the stability region of the conmpensation for MDOF systems was evaluated. This was verified by the results of actual hybrid experiments using the developed system. Then, the accuracy of the developed system was investigated by comparing the experimental results with those obtained without response delay. Since the results were similar, it was shown that the developed system with conmpensation can be used for seismic experiments on MDOF structural systems.
