An Improving Model on Contact Time of The Inertial Impact Switch

Abstract

Inertial impact switch is a widely used inertial force recognition element in electromechanical trigger fuze of missiles, rockets and artillery shells. In this paper, the impact responses of inertial switch are investigated with abundant acceleration loads through the dynamics analysis. Based on the Machete hammer experiment, the accuracy of the dynamics model is verified with a very small error. The systematic dynamic analysis shows that the contact time of impact proceeding keeps continuously increasing with greater pulse width and acceleration load. On the other hand, the threshold of switch decreases alone with the pulse time. To improve the performance index of the inertial impact switch, a spherical structure model is proposed. Surprisingly, a significant improvement of the contact time is discovered comparing with the cylindrical structural model. The proposed new structure will provide important technical reference for the practical application of devices in fuze technology field.