Three-variable control technique for a seismic analog shaking tableChinese Full Text
LUAN Qiang-li;CHEN Zhang-wei;XU Jin-rong;HE Hui-nong;The State Key Lab of Fluid Power Transmission and Control,Zhejiang University;Hangzhou ECON Science and Technology Co. ,Ltd.;
Abstract: Three-variable control（ TVC） algorithm for a seismic analog shaking table was studied deeply,and the correction action of the three-variable feedback and the three-variable feedforward step on the characteristics of the shaking table system was investigated in detail. Through simulation and field tests,the improvement effect of the three-variable control technique on the system frequency response characteristics of the seismic analog shaking table was verified. The system frequency bandwidth was expanded effectively by introducing the velocity feedback of TVC. The system damping was raised by introducing the acceleration feedback of TVC. The pole points of the system closed-loop transfer function close to the imaginary axis were eliminated and the system bandwidth was further extended by introducing the threevariable feedforward control. Finally,by conducting the seismic wave reproduction test on a three-variable controlled shaking table,it was shown that the TVC algorithm can realize a higher-precision seismic wave reproduction test.
Keywords：
seismic analog shaking table; three-variable control（TVC）; TVC servo controller; seismic wave reproduction;
- DOI：
10.13465/j.cnki.jvs.2014.08.010
- Series：
- Subject：
- Classification Code：
TU311.3
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