Self-locking and positioning fuze safety and arming device based on MEMS
Aiming at the requirements of reducing the volume of small-caliber grenade fuze safety and arming device(S&A device)while strengthening the redundancy safety performance and structural strength,we propose an improved self-locking and positioning fuze MEMS S&A device based on electroformed nickel material.The device makes use of the recoil environment and centrifugal environment excitation characteristics,to the command-controlled electric pusher to achieve three independent redundancy safety features and arming delay functional requirements,unlike traditional explosion-proof mechanisms that require additional micro-spring assisted locking,this device's explosion-proof mechanism achieves self-locking and positioning with a counter-locking circlip structure,and is capable of locking in place at once without collision rebound under environment excitation.With the help of rigid-flexible coupled dynamics and finite element simulation and prototype experiment,the arming action and locking strength of the S&A device are investigated under the specified technical specifications.Simulation and prototype test results show that:the proposed device can identify the recoil and centrifugal environmental excitation of normal launch,meet the arming action requirements without material strength failure,the S&A device is simple and reliable.
fuzeMEMSsafety and arming devicelock pin structure
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