多激励识别的自适应延迟逆系统方法

周盼;李玩幽;率志君

振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 41-45.

PDF(799 KB)
PDF(799 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (22) : 41-45.
论文

多激励识别的自适应延迟逆系统方法

  • 周盼,李玩幽,率志君
作者信息 +

Adaptive delayed inverse system method for multiple input excitations reconstruction

  • Zhou Pan, Li Wan-you, Shuai Zhi-jun
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摘要

针对现有逆系统方法依赖于状态空间模型的缺点,提出采用系统的自适应延迟逆模型识别多激励的时间历程。首先采用自适应算法对系统进行延迟逆模型辨识,随后结合逆模型利用工作状态的响应数据识别时域载荷。以简支梁为研究对象,分别采用无噪声干扰、有噪声干扰的加速度响应识别多点稳态激励和多点非稳态激励。仿真结果表明:噪声干扰情况下识别精度有所降低,但比较满意,验证了该方法对多激励源识别的可行性。此外,对该方法进行了试验验证。

Abstract

Adaptive delayed inverse model of mechanical system is adopted to determine time histories of multiple input forces aimed at the shortcoming that existing inverse system method relies on the state-space model. Adaptive algorithm is applied to identify delayed inverse model, followed by time domain force estimation using operational response combined with inverse model of mechanical system. Multi-input forces of simply supported beam were reconstructed by dynamic accelerations without and with noise disturbance. Simulation results illustrate that reconstruction accuracy decrease under noise condition but relatively satisfied and the method for multi-input identification is feasible. Furthermore, this method is validated experimentally.

关键词

振动 / 时域载荷识别 / 自适应延迟逆模型 / 时间延迟

Key words

vibration / time domain force estimation / adaptive delayed inverse model / time delay

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导出引用
周盼;李玩幽;率志君. 多激励识别的自适应延迟逆系统方法[J]. 振动与冲击, 2014, 33(22): 41-45
Zhou Pan;Li Wan-you;Shuai Zhi-jun. Adaptive delayed inverse system method for multiple input excitations reconstruction[J]. Journal of Vibration and Shock, 2014, 33(22): 41-45

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