关键词: 固体力学 , 武器 , 撞击 , 动力学 , 参数估计

Abstract: A dynamic model for in low-speed impact systems conventional weapons was built up in this paper. The system identification method for timely-changed, non-linear differential equations was given, in which the least square method and the algorithm of self-fitted step-time were combined. The method of analysis for the low-speed impact system is usually divided into two types ： rigid impact and elastic impact of which the elastic impact model is applied in this study. An automation mechanism example for small-arms was put forward and analyzed. The stiffness and damping were calculated for the gun，s back impact move?ment. These parameters were provided for further simulation of small-arms. The results show that the method mentioned has its flexibility, feasibility and practicability.

Key words: solid mechanics , weapon , impact , dynamics , parameter estimation