Fire Control Technology Using Inertia And Collision

Armor-piercing projectiles can not hit armored targets 100% in direct and effective range.In most cases,projectiles fall on the ground near the armored targets,and the phenomenon of scraping the ground often occurs when the projectiles land.In order to ensure that the projectile rubs reliably on the ground and explodes,killing the followers,the fuze is required to have a very high rubbing sensitivity and initiation rate.Based on the main functions and structural elements of a typical electromechanical fuze,a multi-information control scheme for ground-scraping explosion ignition control system is proposed,which includes safety and de-insurance control,power supply control and target collision control.The safety and de-insurance control is provided by the fuze insurance institution.A ground-scraping ignition inertia switch and a micromechanical universal landing switch for power supply control and target impact control are designed.The mechanical environment of the system is analyzed.The response model of the environment identification mechanism and the latch-on mechanism of the ground-scraping ignition inertia switch is established.The simulation test of the multi-information ground-scraping ignition control system is carried out.The results show that the scheme is feasible.A micromechanical universal landing switch with elastic fixed electrode and elastic obliquely supported movable electrode was designed.The relationship between the natural frequency and initial clearance of the system and threshold,response and contact time was established.The influence of electrode collision and overturn on clearance was analyzed.The simulation results show that the switch can respond reliably when the in-plane acceleration exceeds 427g;under the overload of 450 g pulse width of 0.6ms,the closing time of the switch in the working range is at least 57μs,and the response time is 396μs;the switch has a certain adaptability to overload pulse width;the switch can resist high overload,after the high load of 20000 g.The structure is not damaged and can continue to work after the deformation is restored.The processing scheme of the switch is designed and the process flow is given.The feasibility of reliable response of switch to impact is verified by experiments.