1. Colloge of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Beijing Changcheng Institute of Metrology & Measurement, China Aviation Industry Group Co Ltd, Beijing 100095, China
3. Science & Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing, 100076, China
4. School of Instrumentation & Optoelectronic Engineering, Beihang University, Beijing 100191, China
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.
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2021, Vol. 42 
