The Research Of Test Method And Protection Technology Of Information Processing System In HIRF Based On Reverberation Chamber

There are three aspects of the research jobs are completed in this paper:Firstly,using with reverberation chamber can get a High Intensity Radiated Fields inevitably(HIRF)environment which has a wide frequency range from 100 MHz to 18 GHz in this paper.In this test research,information processing system should be exposed in HIRF.Under the test,through observing computer system running condition in different wave form ?frequency?field strength and pulse width,it obtains computer system sensitivity threshold.The reasons of computer system errors are also analyzed.Some aircraft sensor equipments are carried out HIRF test according to Cat G equipment in RTCA/DO-160 G.And the reasons of sensor system could work properly in electromagnetic environment which frequency range is from 8 GHz to 12 GHz are also analyzed.Secondly,the model of reverberation chamber is created with a Commercial electromagnetic simulation software.The electric field strength values in 9 positions of the workplace and 12 positions of the stirrer data sampling are recorded and standard deviations of field uniformity are calculated.The results present that the performance of the reverberation chamber conforms to RTCA/DO-160 G.The electromagnetic simulation can be carried out above 1 GHz in reverberation chamber.Finally,shielding,grounding and filtering are introduced briefly in this paper.The test and simulation calculation of the enclosure of information processing system are analyzed emphatically.Shielding effectiveness measurement of materials using nested reverberation chambers is provided.Traditional method lacks are overcome.In this paper,the model of the enclosure of information processing system is built.Through calculating the average field strength?maximum field strength?center position field strength?hole position field strength ?near the enclosure field strength,it could obtain shielding effectiveness of the enclosure of information processing system.Based on the result,the effects of shielding effectiveness are acquired in the different hole size?hole form?hole area and hole position.And the reasons of the shielding effectiveness difference are analyzed.Finally,shielding protection of information processing system is designed according to the results have been studied.