Development of Highly Versatile On-Line Hybrid Test Systems using DSP units

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Development of the highly versatile hybrid testing system taking advantage of the use of DSP is studied. The test method is based on the real-time hybrid loading test, and the substructure Hybrid Shake Table (SHST) test method based on the principle of the hybrid testing technique and the substructure technique in order to evaluate t he real-time dynamic response of test structures and structural components is studied This test method consists of the shake table test or loading test using actors for the experimental substructure that is a part of the structural system and numerical computation for the numerical substructure. In this study, the reliability and accuracy of the test methods are secured by the compensation of the dynamic characteristics including the phase lag of the actuators and the shaking table response using the application of digital filtering technique to the DSP-based control system. The capability of the test method is demonstrated by several kinds of nonlinear dynamic interaction problems. The validation tests includes a case of a Tuned Mass Damper installed to an existing RC bridge column as the countermeasure to the wind induced vibration, liquid storage tank with seismic isolators and Magneto-Rheological(MR) dampers. The effect of the proposed method is clearly shown in the validation tests.