Research Of Fuze Recoil Simulation System Based On Electromagnetic Launcher

Fuze is the key component of the ammunition equipment,and its performance directly relates to the reliability and safety of the ammunition.Currently,the fuze test methods mainly include static detection and shooting range test.The former method can not reflect the true quality of the fuze perfectly.The latter method's cost is high and it is difficult to recycle.Therefore,it is urgent to find an effective method to carry out experimental research on dynamic simulation of fuze.In the case of the fuse whose insurance can be removed by recoil force and centrifugal force,such as artillery fuse,the existing fuze dynamic simulation test methods mainly make use of gas gun(air gun)and its improved test device which has many shortcomings,such as poor controllability,poor universality and difficult to simulate and so on.The simulation based on the electromagnetic linear drive technology is realized in this paper,and the dual-environment forces simulation scheme is introduced based on electromagnetic linear drive technology and rotary motor.The working principle,structure and connection mode of the system are introduced firstly in this paper.Through theoretical analysis and numerical simulation,the parameters of the electromagnetic force,velocity and displacement of the projectile in the electromagnetic linear launcher are studied.Meanwhile,the impact of charging voltage,capacitance and initial position of the projectile on the interior ballistic performance of the test projectile is analyzed.In order to reduce the electromagnetic interference produced by the electromagnetic linear launcher,the fuze electromagnetic shielding cover is designed,and the electromagnetic shielding performance of the aluminum shield cover and aluminum and steel composite shield cover is studied by the finite element simulation.The result shows that the composite shielding cover has better shielding performance,and the shielding effect is much better than without it.Finally,the dynamic simulation test platform of 82 mm caliber fuze is constructed,and the principle experiment is carried out,the feasibility of the system is tested,and the foundation for further engineering application research is established.The main research is included as follows:(1)The dynamic characteristics of environmental forces acting on fuze are analyzed,and the environment dynamic simulation method based on linear electromagnetic driving technology is put forward.Through the establishment of finite element model of a single-stage electromagnetic linear actuator,this paper analyzes internal ballistic properties of test bomb under the action of electromagnetic linear actuator,Meanwile,the acting law of the different parameters on the interior ballistic characteristics is studied.It is the foundation of the further applied research of multi-level electromagnetic linear actuator.(2)Through characteristic analysis of internal ballistic of test bomb,this paper puts forward the design method of multi-stage electromagnetic linear actuator.The two levels of electromagnetic linear actuator simulation analysis model is build,and the drive structure and circuit parameters are optimized.Through the system,the maximum acceleration overload of 10000 g and the overload duration of 1ms can be achieved.(3)Preliminary structure of test bomb was designed in this paper.The electromagnetic environment is analyzed,and the research of electromagnetic shielding technology for fuze is carried out.By analyzing the shielding effect of different materials and different structures of shielding cover,the scheme of improving fuze electromagnetic shielding performance is put forward and the interference problem caused by pulse magnetic field is initially solved.(4)Fuze dynamic simulation test platform was developed and the feasibility of fuze test based on electromagnetic linear actuator is verified.The continuous thrust is realized by trigger control and the peak duration is increased.In this paper,by making use of electromagnetic linear drive technology and rotary motor,the simulation of recoil force and centrifugal force in the process of fuze launch is realized,and there are the merits of good controllability and universality,convenient recovery,low requirements of volume and low test cost.The results can provide a general platform for fuze dynamic simulation test,and it is very helpful to the development of the fuze test technology.After being improved,it can be extended to the ammunition related military factories,research institutes and technical support groups,and it has good military and economic prospects.