Abstract: The key problems in the dynamic linearity calibration of high-g accelerometers using Hopkinson bar system are studied. A single gun barrel system is proposed to achieve the synchronous impacts of two projectiles in the dynamic linearity calibration of accelerometers, in which the two projectiles are fastened by small-sized screws near their rear ends. The influences of geometry and material of projectile, impact velocity and pulse shaper on the excitation signals are investigated by using numerical method. It is found that that the amplitude of excitation pulse could be changed by adjusting the relative area of two projectiles and impact velocity. A certain frequency bandwidth could be achieved by using the projectile made from proper material. The single-barrel system is employed to calibrate the dynamic linearity of 988-1198 accelerometers, which proves the practicability of the proposed calibration system. Key

Key words: solidmechanics, high-gaccelerometer, dynamiclinearity, Hopkinsonbar, pulseshaping