MEMS Fuze Safety And Arming Device Structure Design

For the shortcomings of previous design, such as the lateral movements of the middle slider, the larger overall size, the explosive train did not work, the setback force or centrifugal force could not be directly used and so on. The key components of the interrupter device, such as the middle slider, lockpin, lockpin spring, bottom and cover plate, were improved. The other key components, such as intermediate plate, above plate, electromagnetic actuator, sleeves and bolts, were designed.Dislocation-type explosive train was changed to be inline-type explosive train, the reliability of the system was improved. With the setback structure, the setback force was directiy used to arm the S&A device, the security was improved. S&A device based on MEMS fuse drived by electromagnetic which would be mainly used in the mortars, was integrated assembly. The micro-tensile test, micro-drive test, centrifugation test, and overload impact test were carried out to the whole structure and the key components, improvement comments were proposed according to the experimental results. The results show that the interrupter device can be well armed by the electromagnetic actuator, the S&A device can withstand the centrifugate speed of 2000r/min and the overload impact of 15000g-20000g. Generally speaking, it was successfully designed, with small size, meet the requirements of security and reliability.In order to further reduce the whole size, a new kind of U-beamed with double-hot arm electro-thermal actuator and two different interrupter device based on MEMS fuze drived by electro-thermal were proposed. The static and dynamic simulation were carried out to the electro-thermal microactuator and key components, which were optimizated according to the simulation results. Meanwhile, the technique was designed with UV-LIGA technology based on SU-8 glue to the interrupter device of S&A device based on MEMS fuse drived by electromagnetic and the electro-thermal microactuator, then simulated by the software of Coventor Ware, the thermal-driven test and the experimental analysis ware carried out to the electro-thermal microactuator.