改进的受力状态映射法在结合部动力学参数辨识中应用

李金峰,王立平

振动与冲击 ›› 2016, Vol. 35 ›› Issue (6) : 13-19.

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PDF(1292 KB)
振动与冲击 ›› 2016, Vol. 35 ›› Issue (6) : 13-19.
论文

改进的受力状态映射法在结合部动力学参数辨识中应用

  • 李金峰,王立平
作者信息 +

Application of an improved force-state mapping method in  joint dynamic parameter identification

  •  LI Jin-feng,WANG Li-ping
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文章历史 +

摘要

针对受力状态映射法作为辨识非线性结合部参数重要方法具有物理意义明确、辨识准确等特点,而实际辨识试验时结构某些参数难以测定、致辨识过程困难等问题,提出结合子结构模态综合法的受力状态映射法,可有效解决该问题。参数辨识过程中对模型易出现的缺失项及冗余项,利用基于TSVD(Truncated Singular Value Decomposition)正则化方法的模型迭代修正法。仿真模型表明,修正模型较精确模型误差小、辨识精度高。通过对导轨结合部进行参数辨识实验研究,证明辨识方法的有效性及准确性。

Abstract

Force-state mapping method is an important method for nonlinear joint parameter identification. This method has attractive features, which make the mode physically meaningful and have high identification accuracy. However, certain parameters are difficult to measure during the actual identification experiment. In order to solve such a problem, a force-state mapping method based on substructure modal synthesis method is proposed here. Furthermore, an iterative correction method based on truncated singular value decomposition (TSVD) regularization is proposed to overcome difficulties associated with term-deficiency and term-redundancy, which occur during the parameter identification process. Simulation results showed high identification accuracy demonstrated by small error between the correction and precise models. Finally, parameter identification was carried out using experiments for the joints of a rolling guide. The experiments verified the effectiveness and correctness of the identification method.

关键词

非线性结合部 / 参数辨识 / 受力状态映射法 / TSVD正则化

Key words

nonlinear joint / parameter identification / force-state mapping method / TSVD regularization

引用本文

导出引用
李金峰,王立平. 改进的受力状态映射法在结合部动力学参数辨识中应用[J]. 振动与冲击, 2016, 35(6): 13-19
LI Jin-feng,WANG Li-ping. Application of an improved force-state mapping method in  joint dynamic parameter identification[J]. Journal of Vibration and Shock, 2016, 35(6): 13-19

参考文献

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