Design And Study About Lighting Indrect Effects Waveform A Current Generator

Lightning causes great harm to the safety flight of aircrafts,according to statistics,a fixed route of commercial aircraft will encounter a lightning strike on average per year,a warplane will meet with two lightning strike in its life cycle on average,flight accidents have occurred due to thunder and lightning.Under this background,the countries all over the world launched a study of the aircraft lightning protection and achieved good results,however,microelectronic technology and composite materials are extensively used in the modern aircraft design in order to reduce the weight of aircraft and to improve the aircraft's mobility,but this reduces aircrafts' s shielding capacity to the external electromagnetic environment,aircrafts still face grim threat of lightning,therefore,the study of lightning protection for aircrafts can not be relaxed.Based on the requirement of the test for aircraft lightning indirect effects,A lightning indirect effects A wave current generator system is designed,the system can provide lightning indirect effects A wave that meets the standard requirements,the whole system are mainly composed of waveform generator ontology and its control system,waveform measurement and processing system,etc.The main contents of the paper are:Firstly,analyzing the research status of aircraft lightning protection home and abroad and elaborating the formation mechanism of lightning,the process of lightning stroke and then studying the division of aircraft lightning zoning and the damage effect of lightning on aircrafts.Secondly,A key research is focused on the indirect effect A wave current generator system,the circuit parameters of A-wave are calculated by analytic method based on the mathematical model of the ratio A wave.The influence of the parameters on the waveform is simulated and verified by experiments.And then establishing the waveform measurement and control system based on network control.Finally,analyzing waveforms of indirect effects test of lightning,especially the method,purpose,layout of the circuit conductor and the judgment criterion of the test result.The commonly used protective measures of the indirect effect for lightning protection of aircrafts are introduced.