Research On The Design And Process Of Fuze MEMS Safety And De-insurance Mechanism

In today’s equipment design trend of pursuing fuze miniaturization,intelligence,and dexterity how to reduce the volume of fuze is a problem that must be solved in modern fuze design if we want to add more functions adapted to the modern diversified battlefield in the limited installation space of fuze.In this paper,based on the design and fabrication technology of the micro-electro-mechanical system(MEMS),a micro-electro-mechanical safety system is proposed to ensure the normal safety of the fuze perpendicular to the axis of the projectile through independent dual environment and real-time trajectory information.Based on the design of the pre-project system and the method of combining theoretical analysis with simulation experiment,the research on improving the design of the safety and arming mechanism in the safety system of MEMS is of great significance for optimizing the design of the fuze.(1)The basic requirements of the safety system and its mechanical environment in the whole life cycle of the system are analyzed.The overall design scheme of the MEMS safety system for medium and large caliber ammunition with obvious recoil and centrifugal acceleration is put forward.The environmental identification,volume and anti-high overload performance indexes of the safety system are determined.(2)According to the design and analysis of the setback arming device in the early stage of the project and the response characteristics of the spring mass system under the impact acceleration of service drop and normal launch,the oblique inertial pin setback arming device is designed.The experimental method of finite element simulation is used to verify that it can meet the requirements of MEMS security system in the application environment of this paper and the reliability of the normal launch environment.Aiming at the centrifugal insurance mechanism with slim elastic beam designed in the early stage of the project,a centrifugal arm insurance mechanism with anti-violent collision,centrifugal decommissioning by rotation and easy processing is designed.The insurance mechanism can not only be interlocked by mechanism.It guarantees the recoil and centrifugal release insurance,and can avoid the violent collision after the insurance is released through the interaction of the elastic structure of the mechanism.(3)By using classical mechanics theory and mathematical modeling method,the locking process of typical locking mechanism in the safety system of MEMS is analyzed,and a method to determine whether the locking mechanism can meet the locking requirement by using acceleration criterion is proposed.Through the material strength theory,the strength of dangerous section in the locking process of typical locking mechanism is analyzed.(4)Aiming at the flameproof slider driven by centrifugal force,a replaceable and collision-proof separated flameproof slider locking mechanism is designed.The key parameters of the locking mechanism affecting the locking performance are analyzed,so that the locking mechanism designed in this paper can be successfully locked in one time under the application environment of this paper,and can meet the requirements of the system for the reliability and stability of the locking.