Setback-Centrifugation Compound Safety Mechanism of MEMS Safety and Arming System

Aiming at the condition that when a fuze MEMS S&A is subjected to setback overload, springback occurs after the clamping seat of the setback safety mechanism relieves locking of the explosive-proof sliding block so as to cause that the setback safety cannot be relieved smoothly, and then the explosive-proof sliding block cannot move in place, a compound safety mechanism based on setback-centrifugation two-environment-force is provided. The mechanism is characterized in that the original safety mechanism is separated to serve as a safety sliding block. ANSYS finite element simulation shows that under the action of setback overload, the clamping seat of the compound mechanism can relieve locking of the explosive-proof sliding block and release the explosive-proof sliding block; meanwhile, under the action of centrifugal force, the compound safety mechanism gets rid of restraint of the centrifugal locking device and moves to the direction opposite to the moving direction of the explosive-proof sliding block, and then the fact that the clamping seat of the safety mechanism rebounds and prevents the explosive-proof sliding block from moving is avoided, so as to ensure that the explosive-proof sliding block can move in place smoothly and the fuze S&A relieves setback safety. Therefore, selections and reference can be provided for designing of the setback safety mechanism of the MEMS S&A in the future.