Biomechanical analysis of the shooter-weapon system oscillation

The paper deals with analysis of shooter — weapon system oscillation when firing from a biomechanical point of view. The biomechanical model of shooter arms is developed by taking the muscles and tendons forces into consideration. Linking between shooter and the weapon is treated as elastic and viscose damping. The dynamic model developed for a gas operated submachine gun by applying Lagrange equation of motion has thirteen degrees of freedom. The shooter arms joint stiffness and damping coefficients are experimentally determined. The problem is numerically solved and experimentally verified for the 7.62 mm AKM. The method is able to analyze the shooter — weapon system parameters affecting the gas operated weapon firing stability.