A High-Functional-Density Integrated Inertial Switch for Super-Quick Initiation and Reliable Self-Destruction of a Small-Caliber Projectile Fuze.

ABSTRACT

With the aim of achieving the combat technical requirements of super-quick (SQ) initiation and reliable self-destruction (SD) of a small-caliber projectile fuze, this paper describes a high-functional-density integrated (HFDI) inertial switch based on the "ON-OFF" state transition (i.e., almost no terminal ballistic motion). The reliable state switching of the HFDI inertial switch is studied via elastic-plastic mechanics and verified via both simulations and experiments. The theoretical and simulation results indicate that the designed switch can achieve the "OFF-ON" state transition in the internal ballistic system, and the switch can achieve the "ON-OFF" state transition in the simulated terminal ballistic system within 8 µs or complete the "ON-OFF" state transition as the rotary speed sharply decreases. The experimental results based on the anti-target method show the switch achieves the "ON-OFF" state transition on the µs scale, which is consistent with the simulation results. Compared with the switches currently used in small-caliber projectile fuzes, the HFDI inertial switch integrates more functions and reduces the height by about 44%.