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Man-gun model of shoulder supported firing and sensitivity analysis of structural parameters

Yan Shun, Wang Chang-Ming, Zhou Cheng, Bao Jian-Dong

In order to study the impact of human action on the accuracy of weapons firing, a mathematical model of shoulder supported firing was established. Base on the body movement during shooting, the arms and weapon were simplified into two rigid body with two degrees of freedom, and the interactions between human and weapon was simplified into effect of a system with equivalent springs and dampers. The rigid body dynamics formula was solved by Lagrange method, and also experiment results proved this simulation movement. By parameters sensitivity analysis, the main factors on impact of weapons pitching motion were identified.