Dynamic Characteristics Of The Shock Wave Test System Calibration

The test of shock wave is a difficult problem in dynamic measurement. Many kinds of electromagnetic interference while exploiting and the limitation about the dynamic character of measuring system give rise to dynamic error which influences the result of shock wave testing drastically.The measurement system has been calibrated dynamically many times. Based on the theory of system identification and experimental data, the simulating results of many kinds of parameter models have been compared. Among them, we can find a parameter model that can precisely express the dynamic character of measurement system. On the system model constructed, the dynamic error of measuring data is processed by inverse filtering method. This inverse filter can consider the efficacious bandwidth of signal tested and the character of measurement system synchronously so we can acquire the estimating value of signal tested and the error is little. The technique of inverse filtering can settle the problem about the dynamic error that exist in testing result of shock wave.