The invention discloses a verification method for an electromagnetic model of an aircraft cabin under the condition of a high-intensity radiation field The verification method comprises the following steps: establishing the three-dimensional geometry electromagnetic model of the aircraft cabin, and performing simulating calculation to obtain the field intensity value Esim of the interior of the aircraft cabin; building a high-intensity radiation field scanning test system containing the aircraft cabin, and detecting to obtain the field intensity value Etest of the interior of the aircraft cabin, and calculating an error Rerr between the field intensity value Esim obtained by simulating and the field intensity value Etest obtained through test; if the error is greater than a threshold value, adjusting parameters of the three-dimensional geometry electromagnetic model of the aircraft cabin, and performing the simulating calculation again to obtain a field intensity value Esim of the interior of the aircraft cabin, and recalculating to obtain an error Rerr until the error is not greater than the threshold value to complete verification According to the verification method disclosed by the invention, the verification test process is simple; the accuracy requirement met during verification can be flexibly set according to the actual engineering demand; the accuracy of the electromagnetic model can be flexibly controlled; the verification method has universality, can be used for all-metal aircraft cabins, composite aircraft cabins and metal/composite hybrid aircraft cabins, and lower in verification test cost

Verification method for electromagnetic model of aircraft cabin under the condition of high-intensity radiation field

The invention discloses an aircraft electromagnetic environment safety margin assessment regulation method and belongs to a plurality of flexible equivalence test methods which are based on an equivalent electromagnetic effect which is produced by external electromagnetic environment EME stress for EUT (Equipment Under Test) and/or an equivalent response of EUT function performance. The aircraft electromagnetic environment safety margin assessment regulation method mainly comprises the following steps of 1, confirming a system to be assessed; 2, determining an aircraft external electromagnetic environment level; 3, selecting a proper method to determine a transfer function of an external electromagnetic environment and an internal concern electromagnetic environment; 4, determining an actual electromagnetic field level at a concern according to the transfer function; 5, determining an electromagnetic compatibility design control level of each equipment; 6, carrying out conformance assessment. According to the method, the normalization effect is realized for aircraft electromagnetic environment safety margin assessment work, the operability is strong, the excellent practical guiding is realized, the working efficiency of the assessment in engineering is obviously improved, and the expense is reduced.

Aircraft electromagnetic environment safety margin assessment regulation method

The invention discloses a portable electromagnetic compatibility detection device and a detection method. The portable electromagnetic compatibility detection device comprises a host used for measuring electromagnetic signals, comparing electromagnetic emission signals of a device to be detected under a fault state with electromagnetic emission signals under a normal state, and generating a detection report; a storage module used for storing data required in the detection process; and a receiving unit used for receiving the electromagnetic signals emitted by the device to be detected, wherein the receiving unit further comprises one or more testing antennas used for receiving radiation signals emitted by the device to be detected at a certain distance and sending the received signals to the host, one or more current probes used for receiving conduction signals emitted by the device at fixed positions of cables connected with the device to be detected and sending the received signals to the host, and one or more near field probes used for receiving leaked electromagnetic signals on an internal board card of the device to be detected and sending the collected signals to the host.

Portable electromagnetic compatibility detection device and detection method

The invention provides an electromagnetic radiation interference resisting method and device for an information link of an unmanned aerial vehicle. The electromagnetic radiation interference resistingmethod comprises the steps that unmanned aerial vehicle electromagnetic parameters and external electromagnetic radiation interference information are obtained, and a first parameter sensitive threshold, a second parameter sensitive threshold and a third parameter sensitive threshold are generated according to electromagnetic radiation sensitive information; an early warning signal is generated if the current interference signal intensity is greater than a first interference signal intensity threshold and less than a second interference signal intensity threshold; the unmanned aerial vehicleautomatically switches the channel if the current interference signal intensity is greater than the second interference signal intensity threshold and less than a third interference signal intensity threshold; and the unmanned aerial vehicle automatically executes a return instruction if the current interference signal intensity is greater than the third interference signal intensity threshold. According to the invention, the unmanned aerial vehicle can be avoided from being trapped in a strong electromagnetic interference area suddenly or having a sudden unexpected situation, the electromagnetic threat perception ability of the unmanned aerial vehicle is improved, the degree of influences imposed on unmanned aerial vehicle equipment by external continuous wave in-band electromagnetic radiation interference is reduced, and the intelligent development level of the equipment is improved.

Electromagnetic radiation interference resisting method and device for information link of unmanned aerial vehicle

The invention discloses an electromagnetic radiation signal collecting and processing system and method. The processing system comprises a plurality of frequency spectrum analyzers, a data collecting card, a GPIB (general purpose interface bus) card and a computer, and the frequency spectrum analyzers are arranged side by side and then connected with the data collecting card and the GPIB card which are arranged side by side and then connected with the computer respectively. The collecting and processing method includes step 1, setting parameters of collecting equipment on a computer, and controlling front-end collecting equipment through the GPIB card; step 2, after setting of preposed parameters is completed, starting to collect and store signals by the system; step 3, calling out data stored in the computer in order to enable collected signal data to reflect measured actual conditions. The electromagnetic radiation signal collecting and processing system and method has the advantages that measuring speed is increased, measuring accuracy is improved, and on-site realtime processing of collected signals is realized.

Electromagnetic radiation signal collecting and processing system and method

The invention discloses a ground test method for full-aircraft electromagnetic compatibility of a commercial aircraft. The ground test method comprises the following steps: 1, determining the ground test content of the full-aircraft electromagnetic compatibility of the commercial aircraft; 2, specifying reference paper of the ground test basis of the full-aircraft electromagnetic compatibility of the commercial aircraft; 3, classifying regional electromagnetic environments installed in onboard electronic and electrical equipment; 4, determining a limiting value of electromagnetic compatibility test data, the conducted emission acceptability limit of a cable and the radiated emission electric field intensity acceptability limit of each space; 5, determining and researching an electromagnetic compatibility test system; 6, acquiring a curve that the electric field intensities of electromagnetic environments of a test field are changed along with frequencies; 7, performing conducted emission measurement; 8, performing radiated emission measurement; and 9, performing front door coupling interference measurement. According to the ground test method for the full-aircraft electromagnetic compatibility of the commercial aircraft disclosed by the invention, the problems of aircraft electromagnetic environment classification and test part selection, full-aircraft electromagnetic interference test data criterion setting and quantitative test can be solved. The ground test method for the full-aircraft electromagnetic compatibility of the commercial aircraft is applied to analyze and determine whether a commercial aircraft developed machine meets the electromagnetic compatibility requirement and the airworthiness conformity requirement.

Ground test method for full-aircraft electromagnetic compatibility of commercial aircraft

The invention discloses a low level scanning filed high and strong radiation field testing system. The system comprises a control and data processing module, a high and strong radiation field simulation signal source, a low frequency field strong radiation array, and a multi-channel receiving device. The high and strong radiation field simulation signal source is connected with the control and data processing module through a circuit and used for outputting high and strong radiation field simulation signals. The low frequency field strong radiation array is respectively connected with the control and data processing module and the high and strong radiation field simulation signal source through a circuit, and used for receiving the high and strong radiation field simulation signals output by the high and strong radiation field simulation source and generating field intensities which are evenly distributed in an area to be tested. The multi-channel receiving device is connected with the control and data processing module through a circuit and used for detecting the field intensities in the area to be tested and transmitting the field intensities to the control and data processing module. By means of the low level scanning filed high and strong radiation field testing system, complete-machine-level low level scanning field testing can be conducted on targets like spacecrafts and aircrafts, parameters of the protective properties, like the shielding property, of the spacecrafts and the aircrafts under the HIRF condition can be obtained, and the system can also be used in protective property verification tests of automobiles, rail transit and the like under high electromagnetic environments.

Low level scanning filed high and strong radiation field testing system and low level scanning filed high and strong radiation field testing method

The invention provides a low-level scanning current testing system for an aircraft whole body. The low-level scanning current testing system for an entire aircraft body can generate low-level signals with a set frequency to simulate signals in a radiation field, and irradiates the to-be-tested aircraft though four groups of emitting antennas which are arranged on the ground with the aircraft as the center and according to adjacent 90 degree positional angles; a multichannel reception device sends detected multipath induced-current in internal cables of the to-be-tested aircraft to a frequency spectrum analyzer to analyze; the field intensity of a simulation high-strength radiation field is subjected to calibration; the whole testing system is controlled and tested data are processed by a control and data processing computer; so that an external radiation field-internal cable induced-current transfer function which is required an aircraft whole body high-strength radiation field protection authentication test is obtained. The low-level scanning current testing system for an aircraft whole body of the invention can carry out whole aircraft body low-level scanning current tests aiming at aircrafts, etc., obtain aircraft protection performance parameters under high-strength radiation field condition, and provided basis for aircraft high-strength radiation field protection design and verification.

A low-level scanning current testing system for an aircraft whole body

Provided is a sweep-frequency measuring system of the thunderbolt indirect effect of a low-level complete machine. The measuring system comprises a signal generation unit, a test receiving unit, a multi-channel transmission unit and a test industrial personal computer. The signal generation unit, the multi-channel transmission unit and the test industrial personal computer are connected with the test receiving unit in a circuit mode. The measuring system can be used for aircraft complete machine grade thunderbolt indirect effect tests, obtains transient response signals of key electronic and electric equipment connectors and cable bunches of aircrafts, and achieves aircraft thunderbolt protection design verification and airworthiness conformity verification.

Chen Qiping

Papers

Ground test method for full-aircraft electromagnetic compatibility of commercial aircraft

Low level scanning filed high and strong radiation field testing system and low level scanning filed high and strong radiation field testing method

A low-level scanning current testing system for an aircraft whole body

Sweep-frequency measuring system of thunderbolt indirect effect of low-level complete machine