Theoretical And Experimental Research Of Human-Simulated Firing Platform

The performance evaluation of a weapon is based on a series of tests.Shooting accuracy test is one of the most important tests among them.The shooting accuracy test is conducted by a human shooter.But this will cause some problems such as safety and environment limitation.More importantly,it will definitely bring subjective factor of the shooter itself into the test,and result in that the shooting accuracy results of the test can not reflect weapon itself objectively,and the evaluation of the shooting accuracy test may be biased.Therefore,it is of great importance to design a human-simulated firing platform to replace the human shooter to conduct shooting test.The human-weapon system in standing and unsupported gesture was taken as research subject,and the movements,interaction forces and dynamic characteristics parameters of human-weapon system in shooting were studied.The human-simulated firing platform for one-round and three-rounds shooting test was designed based on the above researches.The main work and research completed were as follows:(1)The movement characteristics of human-weapon system during shooting were obtained by analysis and studies.Based on the characteristics,the 5-DOF dynamic model was built.The dynamic equations of the model were derived by Lagrange method in second form,which provided the theoretical basis for the analysis of the movements,interaction forces and dynamic characteristics parameters of human-weapon system.(2)A non-destructive measurement method of interaction forces in human-weapon system during shooting was proposed.The interaction forces between human hands and weapon were obtained for the first time by the proposed method in shooting test.The signals of the measured interaction forces were analyzed by Empirical Mode Decomposition(EMD)method and Hilbert-Huang Transform(HHT)method,and the elements of the interaction forces between human hand and weapon were extracted and obtained thereby.(3)An identification method of human dynamic characteristics parameters was proposed,based on Orthogonal Empirical Mode Decomposition(OEMD)method.Based on the movement and interaction forces of human-weapon system in shooting test,the stiffness and damping of human body system were obtained for the first time by the proposed method,and the time-varying characteristics of human system parameters in shooting were demonstrated.(4)A human-simulated firing platform to replace the human shooter to conduct one-round and three-rounds shooting test was designed based on National Standard and the movement of human-weapon system in shooting.The rigid-flexible coupling model of the designed human-simulated firing platform was established by ADAMS and ANSYS,and the design parameters of spring-damping systems were obtained by the comparison of simulation results and test results.Therefore,the firing effects of human-simulated firing platform and human shooter were consistent theoretically.(5)The correctness and rationality of the proposed methods and the obtained results were validated by the experiment of measuring the surface electromyography of human muscles in shooting test.The prototype of human-simulated firing platform was developed and the shooting test on it was carried out.Experiment results showed that firing accuracy of human-simulated firing platform and human shooter was consistent basically.As a result,the designed human-simulated firing platform could be used to replace the human shooter in shooting test.The achievements of this dissertation provided a new method reference and theory basis for the weapon design,test and analysis of human biodynamic,which laid the foundation for the further related researches.