基于参数辨识的力传感器动态校准方法

doi:10.3969/j.issn.1000-1158.2021.05.10

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摘要力传感器动态校准通常采用静态指标分析方法,很难评价其结构参数对模型时变特性的影响,为此提出一种力传感器动态校准方法。针对被校准力传感器的结构特征建立参数化数学模型,分析动态激励与结构响应之间的频域传递关系;利用最小二乘法对传递函数的频谱特性进行解析,实现模型参数的辨识;采用频率分析法建立传递函数的频域几何关系式,实现动态校准模型的稳定性评价。采用落锤式冲击力校准装置验证所提方法,结果表明该方法能以较小的标准差辨识被校准力传感器的结构参数,也能依据相位裕量和幅值裕量判断动态校准模型的稳定性。

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	江文松
	尹肖
	李泓洋
	罗哉
	杨军
	王中宇

关键词 ：计量学, 动态力校准, 力传感器, 参数辨识, 频率分析法, 传递函数

Abstract：To evaluate the influence of structural parameters on the time-varying characteristics of a force transducer, a dynamic calibration method is proposed. First, a parametric mathematical model is built according to the structural of the transducer and the transfer function. Second, the model parameters of the transducer are identified from its spectral characteristics by utilizing the least square method. Third, the geometric relations of the transfer function in the frequency domain is built to evaluate the stability of the calibration model based on a frequency analysis method. As well, the suggested method is verified by a drop hammer impact force calibration device. The experimental result shows that the aboved method can identify the structural parameters of the transducer with a small standard deviation and evaluate the relative stability of the calibrated model.

Key words： metrology;dynamic force calibration force transducer parameter identification;frequency response analysis;transfer function

收稿日期: 2020-08-20 发布日期: 2021-05-24

PACS:

TB937

基金资助:国家重点研发计划(2019YFB2004900);国家自然科学基金(52005471,51927811, 51575032);浙江省自然科学基金(LQ20E050016);浙江省重点研发计划(2020C01096)

通讯作者: 王中宇(1963-),河南洛阳人,北京航空航天大学仪器科学与光电工程学院教授,主要从事精密测试技术方面的研究。Email:mewan@buaa.edu.cn E-mail: jwensong@cjlu.edu.cn

作者简介: 江文松(1988-),安徽安庆人,中国计量大学计量测试工程学院副教授,研究方向动态力计量与校准技术。Email:jwensong@cjlu.edu.cn

引用本文:

江文松,尹肖,李泓洋,罗哉,杨军,王中宇. 基于参数辨识的力传感器动态校准方法[J]. 计量学报, 2021, 42(5): 603-608.
JIANG Wen-song,YIN Xiao,LI Hong-yang,LUO Zai,YANG Jun,WANG Zhong-yu. Dynamic Calibration Method of a Force Transducer Based on Parameter Identification. Acta Metrologica Sinica, 2021, 42(5): 603-608.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2021.05.10 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2021/V42/I5/603

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