Abstract: The quantitative reliability assessment of a MEMS-based safety and arming (MEMS S&A) device in fuze is performed based on the structural design and simulation. The structural design of MEMS S&A is then improved and verified through experiment. A primary design of MEMS S&A device is presented. The functional requirements of the key structures in the device are proposed according to the operating environment of small-caliber munition fuzes. Finite element (FE) simulation is adopted to evaluate the design. The structural reliability simulation method based on FE simulation and its implementation procedures are proposed, which can help to quantify the reliability of the device. An efficient CAE software integration method using ANSYS as an example is presented to facilitate the repetitive FE-based calculations. The reliability of the key structures of the device is evaluated, where the randomness of loading, geometric parameters and material properties are taken into account. The significant factors are also identified for further structural improvements. A prototype of MEMS-based S&A device is manufactured, which is delivered to centrifugal experiments. Experimental results demonstrate the feasibility of the design. Key

Key words: ordnancescienceandtechnology, fuzeMEMS-basedsafetyandarmingdevice, reliabilityanalysis, reliability, sensitivity