The Study Of Test Method In300kV Aircraft Electrostatic Discharge

Electrostatic discharge will occur during the aircraft flying, it is because of thecontinuous collision which occurred between the aircraft surface and the dust, ice crystals,rain and other material particle，the collision leads to the charge transfer from the particle tothe aircraft and generate a great potential at the tip of the airplane. When the potential exceedsa certain value with the charge accumulating, the ESD occurred. In addition, during the aerialrefueling, the potential difference which caused by the electrostatic between the two aircraftmay reach300kV. Broadband electromagnetic field generated by the aircraft ESD is one ofthe main source of antenna noise, and electromagnetic field could through the aircraft skinsurface and opening, coupled with the avionics and airborne equipment. When the pins ofdevices emerged static, because the small spacing between the pins, it is particularly prone toelectrostatic discharge, which led to the failure of the aircraft navigation, communication,computer controlled, and even lead to the initiation of missiles and other weapons. AircraftESD protection issue has been growing concerned.In the paper, firstly, aircraft model is partitioned to triangle grid that based on theprinciple of meshing, and finished the change to the model grid in accordance with the needsof computing and simulation situation. Then to research the aircraft precipitation staticelectricity and discharge mechanism. And use the electromagnetic simulation software EMCStudio built a precipitation static discharge model and to simulate it, the P-static dischargetypes include corona discharge, streamer discharge and arc discharge. Next we got the currentwaveform of300kV aircraft electrostatic discharge by the field test. Finally, we used thesoftware EMC Studio to analysis the300kV aircraft electrostatic discharge phenomena andsummed up two electrostatic protection measures which based on the simulation results.The simulation analysis to aircraft electrostatic discharge, not only could we get a betterunderstanding and appreciation of electrification and discharge of the aircraft, but also theresults provided the basis for designing and setting airborne equipments, aircraft formal optimization and the application of airplane electrostatic protection.