神经网络在振动台子结构试验中的应用
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摘要
振动台子结构试验的一个重要研究内容是试验系统的时滞与补偿。时滞会影响试验的精度、系统的稳定,甚至造成计算结果的发散。在现代控制理论中,神经网络是解决时滞问题的一个有效工具。在振动台子结构试验中,可以利用神经网络对作动器的信号进行预测。通过仿真分析发现,神经网络的时滞补偿效果显著。
Time delay is an important studying aspect in real-time substructure testing with shaking table.Time delay can affect accuracy and stability of a testing system,and even cause divergence of calculation results.In modern control theory,neural network is an effective way to compensate time delay.Here,it was used to predict a signal exerted on actuator of a shaking table.Through simulations,it was found that its effect of compensation on time delay is significant.
Time delay is an important studying aspect in real-time substructure testing with shaking table.Time delay can affect accuracy and stability of a testing system,and even cause divergence of calculation results.In modern control theory,neural network is an effective way to compensate time delay.Here,it was used to predict a signal exerted on actuator of a shaking table.Through simulations,it was found that its effect of compensation on time delay is significant.
引文
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[2]杨现东.振动台子结构试验的数值仿真分析[D].哈尔滨:哈尔滨工业大学土木工程学院,2007.
[3]任晓崧,徐植信.结构瞬时开闭环最优控制算法中的迟时研究[J].地震工程和工程振动,1998,18(4):85-90.
[4]Horiuchi T,Konno T.A new method for compensating actuator delay in real-time hybrid experiments[J].Phil. Trans.R.Soc.Lond.A2001,359:1893-1909.
[5]Horiuchi T,Inoue M,Konno T,et al.Real-time hybrid experimental system with actuator delay compensation and its application to a piping system with energy absorber[J]. Earthquake Engineering Structural Dynamics,1999, 28(10):1121 -1141.
[6]Wallace M I,Sieber J,Neild S A,et al.Stability analysis of real-time dynamic substructure using delay differential equation models[J].Earthquake Engineering and Structural Dynamics,2005,34:1817 - 1832.
[7]Darby A P,Williams M S,Blakeborough A.Stability and delay compensation for real-time substructure testing[J]. Journal of Engineering Mechanics,2002,128:1276-1284.
[8]Bonnet P A,Williams M S,Blakeborough A.Actuator performance in real time hybrid tests[C].Proceedings of the First International Conference on Advances in Experimental Structural Engineering,Nagoya,Japan,July,2005;465 -472.
[9]Wu B,Wang Q,Ou J.Numerical study of operator-splitting method for real-time substructure testing with actuator delay and compensation[C].2005 Annual Meeting of Asia-Pacific Network of Centers on Earthquake Engineering Research, Jeju,Korea,10-13 November,2005.
[10]吴斌,王倩颖.实时子结构实验的研究进展[J].实验力学,2007,22(6):547-555.
[11]丛爽.面向MATLAB工具箱的神经网络理论与应用[M].合肥:中国科学技术大学出版社,1998.
[12]张德丰.MATLAB神经网络应用设计[M].北京:机械工业出版社,2009.
[13]刘永昌,关淑贤,任贵兴,等.地震模拟振动台波形再现定量判别法[J].地震工程与工程振动,1998,18(1):109- 112.
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