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复杂结构刚体惯性参数识别方法与试验
罗渊1,2, 王攀1,2, 邓兆祥1,2, 于锋2, 梁柱2
1.汽车噪声振动和安全技术国家重点实验室, 重庆 401122;2.重庆大学 汽车工程学院, 重庆 400044
摘要:
为了高效精确地识别复杂结构刚体的惯性参数,基于频响函数质量线法,设计了惯性参数识别试验装置。采用多体动力学仿真分析了系统刚度与阻尼、噪声、激励点坐标误差、响应点坐标误差、激励角度误差以及传感器安装角度误差对惯性参数识别精度的影响规律。借助搭建试验装置,对已知惯性参数的样件进行识别,惯性参数误差都在5%以内。表明基于频响函数质量线法的试验装置可以高效精确地识别复杂结构刚体的惯性参数。
关键词:  参数识别  刚体  惯性参数  频率响应  质量线
DOI:10.11835/j.issn.1000-582X.2018.10.002
分类号:TH113.1
基金项目:汽车噪声振动和安全技术国家重点实验室开放基金资助项目(NVHSKL-201502)。
Rigid body inertia parameter identification method and experiment for complex structures
LUO Yuan1,2, WANG Pan1,2, DENG Zhaoxiang1,2, YU Feng2, LIANG Zhu2
1.State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing, 401122, P. R. China;2.School of Automotive Engineering, Chongqing University, Chongqing, 400044, P. R. China
Abstract:
In order to identify the inertia parameters of complex structure rigid body with high efficiency and accuracy, an identification test device was built based on the FRF mass line method. The influence of system stiffness and damping, noise, coordinate error of excitation point and response point, angle error of hammer excitation and sensor installation on the identification accuracy were obtained by multibody dynamics simulation. A rigid body with known inertia parameters was identified by the proposed device and the error was within 5%. It shows that the test device based on the FRF mass line method can identify inertial parameters of complex structure rigid body efficiently and accurately.
Key words:  parameter identification  rigid body  inertial parameters  frequency response  mass line
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