Experimental study on measurement technology for projectile deceleration

To provide the reliable mechanical parameters of the fuses during penetration, it is necessary to study the deceleration of the projectiles. The penetration test was carried out for a reduced-scale advanced earth penetration warhead (EPW) into concrete. The deceleration-time curve of the projectile was obtained by a hard recovery technique. The testing system for deceleration is highly modularized, including a testing module, a circuit module, a memory module, a power-supply module and a periphery computer module for data processing. In the testing module, the piezoresistive accelerometer is fabricated by the MEMS technique and it works in a Wheatstone bridge. The projectile mass is about 1.8 kg, including the deceleration testing equipment loaded in it. The maximum diameter of the projectiles is 48 mm, and the striking velocity is 1142 m/s. The deceleration magnitude obtained by the experiment is approximately 20×10⁴g.