Abstract：An identification method for the transfer function of the resistance strain data acquisition system is proposed. The detailed technical process is given, including the construction and assignment of the resistance strain step excitation source, the acquisition of the resistance strain step signal waveform, and the constant time delay of the strain amplifier. Measurement estimation, the measurement and the estimation of the constant time delay of the strain amplifier, the step response sequence of the resistance strain data acquisition system is obtained by equivalent sampling method, the timing sequence of the excitation sequence and the response sequence is unified and synthesized, and the transfer function of the resistance strain data acquisition system is performed by the least square method with a special whitening filter. The transfer function identification application in a set of experiments demonstrates the effectiveness and feasibility of the method described. The method can be used for the calibration of the dynamic characteristics of the resistance strain data acquisition system and its transfer function identification.
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2020, Vol. 41 
