The Parametric Analysis of the Threshold Value Judging Mechanism in MEMS Safety and Arming Device

Abstract

In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the threshold value judging mechanism is to determine the environment suffered by centrifugal force and control the sub-centrifugal slider not movement under the threshold, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of threshold value judging mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate threshold value judging mechanism is designed to meet two items, one item is the deformation of threshold value rod is not enough to release sub-centrifugal slider when the speed is less than 60000r/min; the other item is deformation of threshold value rod can release sub-centrifugal slider when the speed is more than 60000r/min.

Design of High-Reliability Micro Safety and Arming Devices for a Small Caliber Projectile

“… Simulation analysis of the micro S & A module in ANSYS/LS-DYNA. ( a ) The finite element model of micro S & A module; ( b ) The centrifugal and overload force application curve [ 4 , 16 ]. …”

“…The application of micro technology can deal with this problem efficiently, which should bring a significant influence to the development of fuse [ 13 , 14 ]. Most micro S & A devices are through the environmental forces to be arming [ 15 , 16 , 17 ]. The representative micro S & A devices are as follows.…”