High-pressure Dynamic Calibration Data Fusion And Modeling Methods

To obtain dynamic character of transducer, which is the precondition to measure exactly transient change high pressure and is the important part of research of high pressure calibrating theory and method, is very important to weapon science research. So whether in theory or in practice, it has important signification for researching dynamic character of transducers.Data of response of three high-pressure transducers are acquired respectively with effect of gas-shock tube and quick-opening valve. Dynamic characters of transducers are known fully because of complementarity of data when transducers are calibrated at different frequency bands and pressure ranges.Characteristic of excitation signal and its influence for modeling are discussed in this paper. The factors including piping influence and vibration of devices that will infect data are analyzed. Methods of applied modeling are discussed. Characteristics of spectrum are gained based on experiment data processed and analyzed by mutual correlation spectrum and removing noise with wavelet analysis. Mathematical model is established using data fusion theory to lessen disturbance.