Rapid detection method of propellant parameters based on pulsed laser

In order to verify the applicability of the rapid measurement method of energy performance parameters of propellant based on pulsed laser ablation, a pulsed laser interaction platform with energetic materials and an experimental platform for transient diagnoses such as shockwave and plasma image were firstly established. Based on this platform, the shockwave and plasma characteristics of single, double, and triple base propellant and monocrystal rock sugar under pulsed laser ablation were studied experimentally. The influence of laser parameters on the ablation process of pulse laser and the difference of shockwave and plasma image between the single base propellant and monocrystal rock sugar was obtained. The results show that the shockwave and plasma expansion characteristics of single base propellant are mainly affected by the chemical reaction energy release of energetic substances, while that of rock sugar is mainly affected by laser irradiance. Furthermore, taking single, double, and triple base propellants as samples, based on shockwave propagation distance parameters and laser energy parameters, the linear calibration models of shockwave characteristic velocity and its explosive force, explosive heat, and explosive temperature were established by using support vector machines regression algorithm. The determinate coefficient R² values were 0.9912, 0.9998, and 0.9999, respectively. The results show that this method predicts the explosive force, explosive heat, and explosive temperature of the propellant well and provides a reference for the study of the interaction between pulsed laser and energetic materials.