The Study on Projectile Shockwave Signal Processing Method Based on EMD

The shockwave signals obtained in experiment were nearly submerged in the high-frequent noise,so it is very important to develop the preprocessing method for identifying the useful signals.By analysis of the properties of shockwave signal,the empirical mode decomposition was adopted to extract and select its characteristics.Intrinsic mode function components and instantaneous frequency were collected to obtain better processed results.The results prove that the method could not only effectively extract the characteristics of the shockwave signal in high noise,but also be apt to implement with the hardware.