The Research of a Miniaturized Ammunition With Built-In MEMS Safety-and-Arming Device for Micro Drones

With the rapid development and application of unmanned equipment, the micro drone which combines the function of search and attack attracts much more attention by institutions all over the world. However, confined by the working principle of the traditional warhead payloads, the Safety-and-Arming (SAD) of the traditional ammunition will be set into the armed position or even removed before the micro drone taking off. The ammunition with the malfunction SAD can be seen as a bomb that may explode at any time, which leaves a huge security risks to operators. Herein, a miniaturized ammunition with MEMS SAD is introduced in this paper. A plane MEMS SAD has been set in the explosion train successfully, which minimizes the ultimate size of the ammunition into$\Phi ~22$mm$\times40$mm. Commanded by the control signals, the safe, arm, and explode functions of the MEMS ammunition can be realized. A micro shaped charge warhead is optimized specifically in this MEMS ammunition. With the charge amount as little as 1.4 g, the 20mm thick armor steel can be penetrated. Carried by a 3.6 inch (170mm$\times 170$mm$\times 90$mm) FPV micro racing drone, the MEMS ammunition can easily penetrate the 20 mm thick wood target that 100 m away, which indicates the precision strike capabilities of the whole system.[2025-0245]