Abstract:In order to obtain more realistic frequency response characteristics of the sensors, in this paper, the laser interferometer is used to dynamically calibrate the sensors. Based on the input and output data of the sensors, the structure and order of the system model are determined. Based on the output error model, the system identification experiment method is adopted to identify the parameters of the sensor model, so as to establish the mathematical equivalent model of the calibrated impact acceleration sensors. Then the model equation is converted into the transfer function, and the amplitude-frequency and phase-frequency characteristic curves of the sensors are plotted. Finally, the impact frequency domain calibration of the calibrated sensor is realized.