机载设备雷电防护试验发生器设计

机载设备雷电防护引脚注入试验波形是一种开路电压波形和短路电流波形相同的组合波.针对此类组合波,基于线性RLC冲击电流回路,提出了一种新型的组合波发生器电路.研究了峰值时间、峰值电流、半峰值时间与回路阻尼系数间的关系,提出了以峰值时间和半峰值时间为目标参数的组合波回路参数设计方法.通过计算与仿真,考虑杂散参数的影响,得到机载电子设备雷电防护引脚注入试验组合波发生器电路参数.仿真表明:设计的发生器输出波形满足RTCA/DO-160G标准的要求,可用于机载设备雷电防护引脚注入试验.

Design of lightning protection test generator for airborne equipment

The waveform of lightning protection pin injection test for airborne equipment is a combination wave in which the open circuit voltage waveform is the same as short circuit current waveform. For such class of combination wave, a novel combination wave generator circuit was proposed based on the linear RLC circuit of impulse current. The relationship between the time of peak value, the peak current, the time of half peak value and damping coefficient parameter of the circuit was studied. A design method was proposed for combination wave circuit which the time of peak value and half peak value serve as target parameters. The circuit parameters of lightning protection pin injection test generator for airborne electronic equipment were obtained by calculation and simulation, taking account of the influence of the stray parameters. Simulation results show that the output waveform of the generator designed can meet RTCA/DO-160G standard requirements, and the generator could be used in lightning protection pin injection test for airborne equipment.