Abstract: A simulation principle，which can simulate all of the fire character of an electrical squib which is stored in different conditions for a long time，is presented by the studying of an electric squib’s fire principle and distribution rule of fire variable in long storage.By the principle，a simulation device is built and used to the test process of many type electric squib and fire power supply set.As a result，the simulation device is very useful and reliable.

Key words: electric squib, fire principle, fire character, simulation principle, simulation test

摘要： 该文从电点火具的发火原理出发，分析了电点火具由于存贮中发火性能退化引起发火参数分布特性变化规律，提出了一套可以模拟不同存贮条件下各类电点火具发火特性的仿真原理和工程实现方法，并给出了具体的工程实现实例，验证了仿真原理及设备的实用性和可靠性。试验证明该仿真原理和设备可应用于各类电点火具的发火仿真试验。

关键词: 电点火具, 发火原理, 发火特性, 仿真原理, 仿真试验