CN103884937B - A kind of multiple antennas irradiation test system for aircraft HIRF test and application thereof - Google Patents
A kind of multiple antennas irradiation test system for aircraft HIRF test and application thereof Download PDFInfo
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- CN103884937B CN103884937B CN201410106635.XA CN201410106635A CN103884937B CN 103884937 B CN103884937 B CN 103884937B CN 201410106635 A CN201410106635 A CN 201410106635A CN 103884937 B CN103884937 B CN 103884937B
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Abstract
The invention discloses a kind of multiple antennas irradiation test system for aircraft HIRF test, comprise the irradiation subsystem that many sets are identical, described irradiation subsystem comprises signal source, high power amplifier, launches antenna, it is characterized in that every suit irradiation subsystem is also respectively configured a digital phase shifter and is serially connected in each signal source output port and the input port of high power amplifier, then connect the digital control port of phase-shift phase of each digital phase shifter with a pseudorandom number generator.The electromagnetic environment that the present invention imitates, closer to the actual scene from each orientation irradiation, reduces the most again the requirement that separate unit power amplifier capacity is too high.
Description
Technical field
The present invention relates to be applied to the electromagnetic compatibility test of aircraft, particularly full machine high-strength magnetic irradiation HIRF test
System.
Background technology
The available commercially available broadband high-power amplifier of electromagnetic susceptibility test at present, general output is continuous wave to the maximum
3500W/10kHz～30W/18/40GHz, can form the continuous wave field intensity of 200～300V/m at a distance by supporting antenna at 1 meter.
But aircraft high-strength magnetic irradiation HIRF test needs from launching the electromagnetism ring producing up to several ten thousand V/m outside tens meters of antenna
Border, separate unit height power amplifier is the most helpless.
One solution intuitively is just by multichannel power combing, and this technology merges many inside power amplifier by circuit
Road power is the most common and ripe, remerges can realize with single signal source after multi-path power divider amplifies respectively, as long as really
The electrical length protecting each branch is equal, thus the input for each transmitting antenna is to synchronize (simultaneously with frequency homophase).But for many
Emission source carries out at space point that power combing is the most direct works as, even if ensureing that the input of each transmitting antenna is to synchronize
(simultaneously with frequency homophase), owing to the space length of certain point of observation to each radiation source is different and fixing, each synchrotron radiation source is being observed
The electromagnetic field that point produces has fixing phase contrast, and changes the most therewith with these phase contrasts of movement of point of observation, so must be
Pay close attention to space and form the highly non-uniform three-dimensional interference pattern that a width is fixing, make some some formate field intensity of space be overlapped mutually all the time
Strengthening, some some formate field intensity is cancelled out each other all the time and is weakened, and crest is spaced with trough.The base of this usual array antenna just
Present principles, by controlling bay outlet chamber amplitude, the relation of phase contrast, makes array total radiation energy focus primarily upon expectation
Direction, it is achieved energy assignment spatial distribution.But the uniform electromagnetic environment that this is but radiosensitivity RS test requirements document is not wished
Hope.
Summary of the invention
For the deficiencies in the prior art, the goal of the invention of the present invention is to provide a kind of many days for aircraft HIRF test
Line irradiation test system, makes each radiation source simultaneously with frequency but homophase output so that each branch of point of observation is by force with frequency but phase contrast
Change at random, thus the formate field intensity change at random of each point of observation, assembly average is the most stable, pays close attention to space in random uniform
Electromagnetic environment.
The goal of the invention of the present invention is achieved through the following technical solutions:
A kind of multiple antennas irradiation test system for aircraft HIRF test, comprises the irradiation subsystem that many sets are identical, institute
Stating irradiation subsystem to comprise signal source, high power amplifier, launch antenna, every suit irradiation subsystem is also respectively configured a number of units control phase shift
Device is serially connected in each signal source output port and the input port of high power amplifier, then connects each numerical control shifting with a pseudorandom number generator
The digital control port of phase-shift phase of phase device.The electromagnetic field utilizing pseudorandom number generator to make each irradiation antenna simultaneously launch is homopolarity
Change the phase contrast change at random with frequency, it is ensured that its superposition synthesizes the uniformity of total electromagnetic field, it is to avoid formed solid in irradiation space
Fixed non-homogeneous interference pattern.
Further, each instrument and equipment is manipulated by data/address bus is unified by an industrial computer.
Another object of the present invention is to provide a kind of multiple antennas irradiation testing method for aircraft HIRF test, use
Above-mentioned multiple antennas irradiation test system, comprises the steps of
1) according to required maximum electromagnetic environment field intensity, the size of aircraft, determine that in multiple antennas irradiation test system, irradiation divides
The quantity of system；
2) aircraft is placed in the area being insulated from slightly larger than on the ground plane of aircraft vertical projected outline；
3) in azimuth plane and the irradiation subsystem arranged above of aircraft；
4) each transmitting antenna frequently electromagnetic wave of phase contrast change at random same to ambient illumination simultaneously, it is the most electric that synthesis needs
Magnetic environment.
As preferably, the layout of irradiation subsystem should meet following principle:
A), azimuth plane antenna to meet as far as possible launches antenna to the distance d:d >=2D of aircraft2/ λ or d >=1.5 times aircraft line
Degree, takes wherein smaller, and wherein D is antenna dimension, and λ is wavelength；
B), must ensure that the polarised direction of each antenna is consistent, especially note the attitude of upper antenna；
C), arrange each antenna point to mutually stagger, main lobe can not directly be mutually aligned.
As preferably, being equipped with one-way isolator between irradiation subsystem and aircraft, components and parts are launched in protection.
Compared with prior art, the beneficial effects of the present invention is: the more conventional single antenna of electromagnetic environment that the present invention generates
Method, closer to the actual scene from each orientation irradiation, reduces the most again the requirement that separate unit power amplifier capacity is too high, although build examination
Test and in facility expense, do not have advantage, but feasibility is greatly enhanced.Experiment process is simple simultaneously, strong operability, has very well
Practical directiveness, can significantly improve and in engineering, carry out the work efficiency of this type of assessment, reduction expense.Contribute to China to rise
The aircraft-level seaworthiness of civil aircraft that step is carried out takes, the carrying out of certification work.
Accompanying drawing explanation
Fig. 1 is the system block diagram of a kind of multiple antennas irradiation test system for aircraft HIRF test of the present invention.
Fig. 2 is flivver multiple antennas layout drawing (vertical view) in the embodiment of the present invention.
Fig. 3 is big aircraft multiple antennas layout drawing (vertical view) in the embodiment of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
A kind of multiple antennas irradiation test system for aircraft HIRF test of the present invention comprises many sets (more than general 4 sets) phase
With irradiation subsystem, every suit irradiation subsystem contact successively signal source, digital phase shifter, high power amplifier, launch antenna, use again
One pseudorandom number generator connects the port of each digital phase shifter, utilizes pseudorandom number generator to make each irradiation antenna send out simultaneously
The electromagnetic field penetrated is that same polarization is with phase contrast change at random frequently, it is ensured that its superposition synthesizes the uniformity of total electromagnetic field, it is to avoid
Fixing non-homogeneous interference pattern is formed in irradiation space.All appts equipment is united by data/address bus by an industrial computer
One manipulation.System composition connects block diagram and sees accompanying drawing 1.
In EMC radiosensitivity RS test, the test of high level field intensity HIRF, it is desirable to frequency scan rate to arrive tested slowly
Part has enough time to respond, and every frequency residence time of general step-scan is more than or equal to 1 second, LINEAR CONTINUOUS scanning speed
Rate is the most quite or slower.This second level rate of change is not difficult to realize for digital phase shifter.
During use, 1) according to required maximum electromagnetic environment field intensity, the size of aircraft, determine the quantity of irradiation subsystem.Press
Single set radiation subsystem can produce 300V/m@continuous wave, 3000V/m@impulse wave PW=1 μ s/PRF=1kHz field intentisy meter, as
Using on big aircraft, select eight set radiation subsystems, synthesis total intensity is expected to reach 2400V/m@continuous wave, 24000V/m@arteries and veins
Rush ripple PW=1 μ s/PRF=1kHz.This has met the requirement of current seaworthiness or GJB1389A.
2) aircraft is placed in the area being insulated from slightly larger than on the ground plane of aircraft vertical projected outline.Launch irradiation
The electromagnetic wave reflection on ground plane that antenna is launched so that synthesize electromagnetic field at ventral relatively strong, this with meet with in-flight
The situation that electromagnetic interference comes from ground installation more is consistent；
3) each irradiation subsystem is arranged according to aircraft size；
All around respectively arrange a set of for flivver at it, antenna beamwidth >=90 °, height and aircraft horizontal axis
Identical.A set of omnidirectional antenna, downward irradiation (see accompanying drawing 2) at above machine top 10 meters are arranged in surface.
At its azimuth plane, 6～10 sets, antenna beamwidth 36 °～60 °, height and aircraft level are arranged for large aircraft
Axis is identical.Left and right sides arranged above 2 set, antenna beamwidth >=180 °, respectively at 10 meters, top downward irradiation (see accompanying drawing
3)。
4) each antenna frequently electromagnetic wave of phase contrast change at random same to ambient illumination, total electromagnetism ring that synthesis needs simultaneously
Border, then by RS test procedure implement HIRF test.
Should be noted that item:
1) active antenna should meet far field condition (D is antenna dimension, and λ is wavelength) to distance d of aircraft
d≥2D2/λ
Or d >=1.5 times aircraft dimension, take wherein smaller
Azimuth plane antenna to meet this condition as far as possible, can suitably shift near unless field intensity amplitude does not reaches；Top antenna is then examined
Consider the feasible and convenience to testing ground, be the most directly defined as 10 meters.
2) must ensure that the polarised direction of each antenna is consistent, especially note the attitude of upper antenna.
3) must be noted that " the reciprocity effect " of antenna, prevent emittance from pouring in down a chimney damage power amplifier, be all-trans even if power amplifier has
Penetrate defencive function.Should arrange the sensing of each antenna mutually to stagger, main lobe necessarily can not directly be mutually aligned as far as possible.Transmission channel simultaneously
Being equipped with the one-way isolator of the sufficiently large similar circulator of isolation, components and parts are launched in protection.
Claims (5)
1., for a multiple antennas irradiation test system for aircraft HIRF test, comprise the irradiation subsystem that many sets are identical, described
Irradiation subsystem comprises signal source, high power amplifier, launches antenna, it is characterised in that every suit irradiation subsystem is also respectively configured one
Digital phase shifter is serially connected in each signal source output port and the input port of high power amplifier, then connects with a pseudorandom number generator
The digital control port of phase-shift phase of each digital phase shifter.
A kind of multiple antennas irradiation test system the most according to claim 1, it is characterised in that described signal source, high power amplifier,
Launch antenna, digital phase shifter and pseudorandom number generator by an industrial computer by the unified manipulation of data/address bus.
3., for a multiple antennas irradiation testing method for aircraft HIRF test, use arbitrary many days described in claim 1-2
Line irradiation test system, it is characterised in that comprise the steps of
1) according to required maximum electromagnetic environment field intensity, the size of aircraft, irradiation subsystem in multiple antennas irradiation test system is determined
Quantity；
2) aircraft is placed in the area being insulated from slightly larger than on the ground plane of aircraft vertical projected outline；
3) in azimuth plane and the irradiation subsystem arranged above of aircraft；
4) each transmitting antenna frequently electromagnetic wave of phase contrast change at random same to ambient illumination, total electromagnetism ring that synthesis needs simultaneously
Border.
Multiple antennas irradiation testing method the most according to claim 3, it is characterised in that the layout of irradiation subsystem should meet
Following principle:
A), azimuth plane antenna to meet as far as possible launches antenna to the distance d:d >=2D of aircraft2/ λ or d >=1.5 times aircraft dimension, take
Wherein smaller, wherein D is antenna dimension, and λ is wavelength；
B), ensure that the polarised direction of each antenna is consistent；
C), arrange each antenna point to mutually stagger, main lobe can not directly be mutually aligned.
Multiple antennas irradiation testing method the most according to claim 3, it is characterised in that between irradiation subsystem and aircraft
Being equipped with one-way isolator, components and parts are launched in protection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410106635.XA CN103884937B (en) | 2014-03-21 | 2014-03-21 | A kind of multiple antennas irradiation test system for aircraft HIRF test and application thereof |
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| CN201410106635.XA CN103884937B (en) | 2014-03-21 | 2014-03-21 | A kind of multiple antennas irradiation test system for aircraft HIRF test and application thereof |
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| CN103884937B true CN103884937B (en) | 2016-08-17 |
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| CN104375045B (en) * | 2014-11-27 | 2017-03-29 | 上海无线电设备研究所 | The removing method of ground Multipath reflection mushing error in a kind of HIRF tests |
| CN112114218B (en) * | 2020-09-22 | 2024-02-23 | 上海无线电设备研究所 | High-level test system for HIRF test and verification method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005241421A (en) * | 2004-02-26 | 2005-09-08 | Maspro Denkoh Corp | Interference excluding capability testing apparatus |
| US7218123B1 (en) * | 2006-02-13 | 2007-05-15 | Rockwell Collins, Inc. | Centralized HIRF detection system |
| WO2010119744A1 (en) * | 2009-04-16 | 2010-10-21 | 日本電気株式会社 | Antenna device and multi-antenna system |
| CN103033708A (en) * | 2012-12-13 | 2013-04-10 | 中国航空无线电电子研究所 | Plane whole-machine high-strength illumination testing method |
| CN103323682A (en) * | 2013-06-04 | 2013-09-25 | 上海无线电设备研究所 | Low level scanning filed high and strong radiation field testing system and low level scanning filed high and strong radiation field testing method |
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2014
- 2014-03-21 CN CN201410106635.XA patent/CN103884937B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005241421A (en) * | 2004-02-26 | 2005-09-08 | Maspro Denkoh Corp | Interference excluding capability testing apparatus |
| US7218123B1 (en) * | 2006-02-13 | 2007-05-15 | Rockwell Collins, Inc. | Centralized HIRF detection system |
| WO2010119744A1 (en) * | 2009-04-16 | 2010-10-21 | 日本電気株式会社 | Antenna device and multi-antenna system |
| CN103033708A (en) * | 2012-12-13 | 2013-04-10 | 中国航空无线电电子研究所 | Plane whole-machine high-strength illumination testing method |
| CN103323682A (en) * | 2013-06-04 | 2013-09-25 | 上海无线电设备研究所 | Low level scanning filed high and strong radiation field testing system and low level scanning filed high and strong radiation field testing method |
Non-Patent Citations (3)
| Title |
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| 低电平耦合技术在飞机级试验中的应用;胡平道;《微波学报》;20100815(第S2期);第58-61页 * |
| 复杂强电磁环境下系统辐射敏感度测试方法;郭恩全等;《安全与电磁兼容》;20120630(第6期);第49-52页 * |
| 辐射电磁场测试方法的研究;牟宏伟等;《仪表技术与传感器》;19961130(第11期);第20-22页 * |
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