Design And Experimental Research On Structural Improvement Of Fuze MEMS Safety System

Aiming at the development requirements of miniaturization,intelligence,and multifunctionality proposed by modern fuze,this paper conducts research on fuze MEMS safety systems with medium and large caliber grenades as the application background.This paper proposes a method that relies on recoil overload,centrifugal overload and real-time ballistic position information as the safety and arming device.A combination of theoretical analysis,model simulation,and prototype test was used to carry out technical research on various insurance mechanisms,insurance reliability and performance test verification.The design content and design process of the fuze MEMS safety system are proposed.The mechanical environment that the fuze is subjected to throughout its life cycle is analyzed.According to the basic design requirements of the fuze safety system and the system performance requirements,a circuit control module,safety and The overall design scheme of the MEMS safety system consisting of the safety and arming device module and the output medicine board module is analyzed,and the working principle of the MEMS safety system is analyzed.According to the problem that the design of the recoil mechanism can not meet the design index requirements in the early stage,by analyzing the response characteristics of the undamped spring mass system under the action of half-sine acceleration,an improved cantilever mass block snap-in recoil insurance mechanism can be designed,which can identify service drop Two typical acceleration environments are launched normally,and the feasibility of the design is verified by finite element simulation analysis.A centrifugal insurance mechanism that relies on centrifugal inertia force was designed.The reliability of the relief was verified by establishing a mechanical model and simulation analysis of the centrifugal mechanism.The instruction lock mechanism that realizes the function of deferred release of insurance was optimized and designed,which improved the structural strength and the driving compatibility of the micro electric salesman.The flameproof slider locking mechanism was improved.The feasibility of the locking mechanism was analyzed theoretically.The function of the locking mechanism was verified by model simulation.The nickel-based UV-LIGA processing technology was used to develop a prototype of the safety and arming device.The key parts of the prototype were measured by SEM scanning electron microscopy,combined with the production process of the prototype to analyze the causes of processing errors,and based on the same batch of prototypes.Corresponding process improvement measures are proposed for surface topography and processing errors.The simulated prototype service drop test,centrifugal environment test,thrust test,and high impact environment test were performed on the principle prototype of the safety and arming device by building a test platform.The test results were compared with the simulation results to verify the safety of the recoil mechanism service and the centrifuge The safety reliability is relieved with the instruction lock mechanism,the lockout reliability of the flameproof slider and the overall structure's resistance to high overload.