The Research on Gun Vibration Characteristic Analysis Based on Wavelet

The projectile movement on bore is the key factor of gun vibration character. In order to obtain the projectile movement with the information in time-domain and frequency-domain, the wavelet transform is used for time-domain and frequency-domain analysis of response from the dynamics model with coupling between gun and projectile. The dynamics model of multi-body system with consideration of collisions between projectile and rifle is constructed for a gun. The traverse acceleration of projectile with time history is acquired by numerical computation. Because wavelet transform has favorable locality in time-domain and frequency-domain and the signal time-domain average is not needed, the continuous wavelet transform is applied to construe the response on acceleration of projectile. The figure of time frequency phase plane is plotted, which can directly describe the energy and time when the collision of projectile occurs, and can provide the reference for gun vibration characteristic analysis.