A control strategy of earthquake simulation test based on elastic payload

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (5) : 26-30.

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A control strategy of earthquake simulation test based on elastic payload

TIAN Pan, CHEN Zhang-Wei

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Abstract

The specimen is assumed to be rigid payload in traditional earthquake simulation test control. To overcome the poor control precision of this control, an earthquake simulation control strategy is proposed. This control strategy configures servo-control parameters reasonably by analyzing physical modal of elastic payload，so the transfer function of shaking table unify approximately under a variety of load. On this basis, the system identification method of vibration control is optimized. The shaking table system can obtain high simulation precision for seismic wave without pre-test step. The experimental results which are got in Zhejiang University shaking table indicate that control strategy can obtain the first frame correlation coefficient of reference signal and control signal in time domain above 85% without pre-test step in the case of parameter optimization; after several frames of earthquake simulation test, the correlation coefficient of reference signal and control signal in time domain can reach 90% through identifying the transfer function continuously.

Key words

Earthquake simulation test / Elastic payload / 3-parameters servo control / Adaptive control

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TIAN Pan;CHEN Zhang-Wei. A control strategy of earthquake simulation test based on elastic payload[J]. Journal of Vibration and Shock, 2013, 32(5): 26-30