Research on the equivalent impact test method for different pulse widths based on micro-electro-mechanical system devices

Abstract

The impact pulse width generated by kinetic weapons during launch differs significantly from that produced by conventional laboratory overload impact methods. Consequently, there is an urgent need to develop a method for evaluating the equivalent impact between overload environments characterized by different pulse widths. In the Hopkinson Bar overload test environment, this study presents a method for performing equivalent impact tests based on the Sum of Effective Impact Energy for micro-electromechanical system acceleration sensors, in accordance with the impact dynamics theory and the law of energy variation. It establishes an equivalent impact model for inertial loads with different pulse widths. The dynamic response of the accelerometer to various impact loads was evaluated through the Hopkinson Bar overload test and live firing test, with an error margin of less than 10 %. Timely guidance can be provided for selecting overload parameters in dynamic impact testing, thereby advancing the engineering process of simulating extreme overload environments.