双振动台随机振动H∞双自由度综合控制研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (5) : 179-183,.

论文

双振动台随机振动H∞双自由度综合控制研究

游伟倩;崔旭利;陈怀海;贺旭东

作者信息 +

Research on dual-shaker random vibration test control by two degrees of freedom H-infinity controller

YOU Wei-qian; CUI Xu-li; CHEN Huai-hai;HE Xu-dong

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文章历史 +

摘要

摘要：在不考虑互谱的情况下，提出了一种双振动台随机振动控制试验的H∞双自由度控制新方法。研究了基于Η∞控制理论的双振动台解耦控制方法，应用Η∞双自由度控制方法进行双振动台随机振动控制。用一悬臂梁模型进行数值仿真验证，仿真结果表明在20~2000Hz频率范围内，利用Η∞双自由度控制方法设计的控制器，能使输出控制谱和参考谱的自谱密度误差控制在±1dB以内，完全符合双振动台设计的控制要求。同时试验结果表明该方法可实现综合控制的所有要求，各项控制精度均满足实际工程要求。

Abstract

Abstract：A new approach is presented for dual-shaker random vibration test using Η-infinity-based optimal decoupling method with two degrees-of-freedom controller without taking the cross-spectra into account. A cantilever beam is used to verify the proposed control approach. A two - inputs two - outputs control model is set up based on the beam. The results demonstrated that, in the frequency range from 20 Hz to 2000 Hz, the controller can make the error between the output PSD (power spectrum density) and the reference PSD less than ±1dB, which is perfect for the dual-shaker random vibration control test. Finally, a test is performed and the test results show that the proposed method can meet the engineering demand.

导出引用

游伟倩;崔旭利;陈怀海;贺旭东. 双振动台随机振动H∞双自由度综合控制研究[J]. 振动与冲击, 2011, 30(5): 179-183,

YOU Wei-qian;CUI Xu-li;CHEN Huai-hai;HE Xu-dong. Research on dual-shaker random vibration test control by two degrees of freedom H-infinity controller[J]. Journal of Vibration and Shock, 2011, 30(5): 179-183,