一种改进的基于自适应控制的地震模拟试验方法

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (9) : 49-52,8.

论文

一种改进的基于自适应控制的地震模拟试验方法

田磐1，2,, 陈章位1，荆伟3

作者信息 +

An improved earthquake simulation test method based on adaptive control

Tian Pan1，2, Chen Zhang-Wei1, Jing Wei3

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文章历史 +

摘要

针对地震模拟试验常采用的开环迭代控制存在控制精度差的缺点，提出一种用于地震模拟的自适应控制方法。该方法不断识别系统的传递函数，来克服液压系统的时变性，获得较高的地震模拟波形复现精度。在此基础上，通过分析控制方法中预试验步骤存在的不足，实现试验方法改进，使得无需预试验步骤能直接进行正式试验，且首帧试验中的参考时域信号和控制时域信号相关系数较高。在浙江大学构建的振动台上进行若干典型地震波试验表明：改进后的试验方法在不进行预试验的情况下，首帧地震模拟试验获得75%以上的输入输出信号时域相关系数，同时能缩短试验时间；多帧地震模拟试验后，通过更新系统传递函数，地震模拟输入输出信号时域相关系数能稳定在95%以上。

Abstract

To overcome the poor control precision of iterative learning control (ILC) which is generally used in earthquake simulation test, an adaptive control method is proposed for earthquake simulation. Adaptive control can obtain high simulation precision for seismic wave, by continuously identifying the transfer function of shaking table to overcome the time-variation of hydraulic system. On this basis, the test method is improved by analyzing the disadvantage of pre-test step, so earthquake simulation test complete without conventional pre-test step, and the correlation coefficient of reference signal and control signal in time domain at a high level. The several typical earthquake wave experimental results which are got in Zhejiang University shaking table indicate that the improved test method can obtain the first frame correlation coefficient of reference signal and control signal in time domain above 75% without pre-test step, while the experimental time is shorten; after several frames of earthquake simulation test , the correlation coefficient of reference signal and control signal in time domain can reach 95% through identifying the transfer function continuously.

导出引用

田磐;;陈章位;荆伟. 一种改进的基于自适应控制的地震模拟试验方法[J]. 振动与冲击, 2012, 31(9): 49-52,8

Tian Pan;Chen Zhang-Wei;Jing Wei. An improved earthquake simulation test method based on adaptive control[J]. Journal of Vibration and Shock, 2012, 31(9): 49-52,8