CN105375999A - Satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test system and satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test method - Google Patents
Satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test system and satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test method Download PDFInfo
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- CN105375999A CN105375999A CN201510809218.6A CN201510809218A CN105375999A CN 105375999 A CN105375999 A CN 105375999A CN 201510809218 A CN201510809218 A CN 201510809218A CN 105375999 A CN105375999 A CN 105375999A
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Abstract
The invention discloses a satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test system and a satellite-borne receiving and transmitting common antenna metal mesh micro-vibration PIM test method. The test system comprises a pneumatic control system, a laser vibration measurement system, a PIM test device, a metal mesh and a PIM box, wherein the metal mesh is arranged in the PIM box, and the pneumatic control system, the laser vibration measurement system and the PIM test device are all connected to the PIM box; the PIM test system introduces compressed gas into the PIM box through a pneumatic pipeline of the pneumatic control system, and calibrates a proportionality coefficient of maximum amplitude of the metal mesh and pipeline pressure of the pneumatic pipeline through the laser vibration measurement system; and the PIM test system controls amplitude and frequency of the metal mesh through the calibrated proportionality coefficient so as to simulate in-orbit vibration of the metal mesh, and further executes micro-vibration PIM test for the metal mesh through the PIM test device.
Description
Technical field
The present invention relates to spaceborne duplexer wire netting field tests, particularly relate to a kind of wire netting micro-vibration PIM test macro and method.
Background technology
Along with the fast development of China's Satellite Payloads technology, communication satellite, remote sensing satellite etc. are day by day obvious to the demand of the large aperture antenna of more than 5 meters.Such antenna due to the restriction being subject to rocket radome fairing volume generally adopt be launch time draw in, after entering the orbit launch form.In order to reduce weight and convenient gathering and expansion, its reflecting surface generally uses metallic reflection net, and because many large aperture antennas all require the ability with transmit-receive sharing, this just requires that used wire netting has good passive inter-modulation performance.Passive intermodulation (PassiveIntermodulation is abbreviated as PIM)) be a kind of Nonlinear perturbations phenomenon.When two or more signal is simultaneously by producing passive intermodulation interference when non-linear parts or non-linear transmission system, the interference signal that usual passive intermodulation produces is called as passive intermodulation product.When the frequency of passive intermodulation product falls into the reception frequency range of satellite antenna, the normal work of receiving system will be affected, satellite receiving system time serious, even can be made to lose efficacy.
Because wire netting braiding structure is complicated, there is the factors such as the relative motion between wire, contact condition change between silk and silk, surface oxidation wiry, quality of coating be unstable, and these factors are all likely potential PIM sources, therefore need to test the PIM characteristic of wire netting.
The PIM performance of wire netting is mainly by the impact of the change of wire side tensile force, vibration environment and variations in temperature three aspect.Under space environment, micro-vibration of wire netting is larger to its PIM performance impact, therefore PIM test to be carried out to micro-vibration of wire netting, because the ferromagnetic medium material of surrounding has a great impact for PIM test result, therefore the PIM test of wire netting needs to carry out in PIM case, and any exposed metal material in case, can not be had, this just proposes harsh requirement to choosing of vibration stimulus source.Conventional driving source adopts vibration generator, and its advantage is that exciting magnitude is controlled, but vibration generator itself is ferromagnetic medium, can impact PIM result, and in order to the impact eliminating vibration generator needs to carry out larger change to PIM case, cost is higher.In addition, in prior art, also useful fan blows the method for wire netting, but the inapplicable PIM of the utilization case of the method carries out testing (fan is also ferromagnetic medium, can not enter PIM case), in addition its exciting magnitude and frequency also unsuitable quantified controlling.
Summary of the invention
Technical problem to be solved by this invention is: for the deficiencies in the prior art, provide a kind of spaceborne duplexer wire netting micro-vibration PIM test macro and method, effectively can avoid the impact using the vibration generator with ferromagnetic property to bring PIM test result in PIM case, improve the accuracy of PIM test, and achieve and by the mode of air-operated drive, wire netting amplitude and frequency are controlled, reach accurate simulation wire netting and be subject to in-orbit encouraging the object that vibration occurs.
The present invention includes following technical scheme:
The invention provides a kind of spaceborne duplexer wire netting micro-vibration PIM test macro, comprise atmospheric control, vibration measurement with laser system, PIM testing apparatus, wire netting and PIM case, described wire netting is arranged in described PIM case;
Described atmospheric control comprises nonferromagnetic material pneumatic line, strainer valve, Pressure gauge, blow down valve and controller, described strainer valve is arranged on described nonferromagnetic material pneumatic line for filtering the impurity in Compressed Gas, described Pressure gauge is for monitoring the gas pressure in described pneumatic line, described blow down valve is arranged on described nonferromagnetic material pneumatic line to purge the gas in pneumatic line, described controller controls the switching frequency of described blow down valve, Compressed Gas is introduced in PIM case by nonferromagnetic material pneumatic line by described atmospheric control, to implement air-operated drive to wire netting, and by the switching frequency changing gas pressure size and blow down valve in pneumatic line, the vibration amplitude size of wire netting and frequency are controlled,
Described vibration measurement with laser system, under different parameters state, is demarcated the proportionality coefficient of gas pressure in the peak swing of described wire netting and described pneumatic line;
Described atmospheric control utilizes the proportionality coefficient demarcated, and the amplitude and the frequency that control wire netting are vibrated in-orbit to simulate wire netting;
Described PIM testing apparatus carries out micro-vibration PIM to wire netting to be tested.
Further, described nonferromagnetic material pneumatic line is plastic cement pneumatic line, and the end of described plastic cement pneumatic line is provided with a nonferromagnetic material nozzle, and described nonferromagnetic material nozzle enters in described PIM case, to introduce in PIM case by described Compressed Gas, air-operated drive is implemented to wire netting.
Further, be also provided with a nonferromagnetic material support in described PIM case, described nonferromagnetic material nozzle is fixed in described PIM case by described nonferromagnetic material support, and determines the distance at described nozzle and wire netting center by the position adjusting described support.
Further, described parameter is that blow down valve switching frequency, described nozzle are apart from the distance at wire netting center, the bore of described nozzle and wire netting tension force.
The present invention also provides a kind of spaceborne duplexer wire netting micro-vibration PIM method of testing, comprises the following steps:
(1) set up atmospheric control, be provided with in the PIM case of described wire netting in the nonferromagnetic material pneumatic line of atmospheric control is accessed;
(2) set up, debug vibration measurement with laser system;
(3) atmospheric control work, Compressed Gas is introduced in described PIM case by described nonferromagnetic material pneumatic line, implements air-operated drive to described wire netting;
(4) by described vibration measurement with laser system, under different parameters state, the proportionality coefficient of gas pressure in the peak swing of described wire netting and described pneumatic line is demarcated, form calibrating parameters table;
(5) remove vibration measurement with laser system, set up, debug PIM testing apparatus;
(6) according to described calibrating parameters table, adjust described parameter and vibrate in-orbit to simulate wire netting;
(7) carry out wire netting micro-vibration PIM by described PIM testing apparatus to test.
Described atmospheric control comprises described nonferromagnetic material pneumatic line, strainer valve, Pressure gauge, blow down valve and controller, through strainer valve, impurity in gas is filtered after Compressed Gas enters described pneumatic line, then purge through blow down valve, enter PIM case finally by the nonferromagnetic material nozzle being arranged on pneumatic line end and air-operated drive is implemented to wire netting; The switching frequency of described blow down valve controls by described controller, and the pressure of gas in described pneumatic line monitored by described Pressure gauge.
Further, described nonferromagnetic material pneumatic line is plastic cement pipeline, and described nonferromagnetic material nozzle is plastic jet nozzle.
Further, described parameter is that blow down valve switching frequency, described nozzle are apart from the distance at wire netting center, the bore of described nozzle and wire netting tension force.
Further, carrying out proportionality coefficient timing signal, pasting the peak swing that measurement target drone is used for described vibration measurement with laser systematic survey wire netting at described wire netting center, when removing vibration measurement with laser system, also described target being removed from described wire netting center.
The present invention compared with prior art tool has the following advantages:
Compressed Gas is introduced PIM case by nonferromagnetic material pneumatic line by the present invention, by the switching frequency changing gas pressure size and blow down valve in pneumatic line, the vibration amplitude size of spaceborne duplexer wire netting and frequency are controlled, reach simulation wire netting to be subject to in-orbit encouraging the object that vibration occurs, the present invention successfully avoid in prior art the impact that the vibration generator with ferromagnetic property brings PIM test result, improves the accuracy of simulation accuracy and the PIM test vibrated in-orbit wire netting.
Accompanying drawing explanation
Fig. 1 is the composition form schematic diagram of wire netting of the present invention micro-vibration PIM test macro;
Fig. 2 is another composition form schematic diagram of wire netting of the present invention micro-vibration PIM test macro;
Fig. 3 is wire netting of the present invention micro-vibration PIM testing process schematic diagram.
Embodiment
Just by reference to the accompanying drawings the present invention is described further below.
The present invention adopts the method for controlled compression exciting gas wire netting, its main thought is that Compressed Gas is introduced PIM case by nonferromagnetic material pneumatic line and nonferromagnetic material nozzle, the support that described nonferromagnetic material nozzle utilizes nonferromagnetic material to make is fixed, and determines the distance at described nozzle and wire netting center by the position of adjusting pole; By the switching frequency changing gas pressure size and blow down valve in pneumatic line, the vibration amplitude size of wire netting and frequency are controlled, reach simulation wire netting and be subject to in-orbit encouraging the object that vibration occurs.Relation in the peak swing of wire netting and pneumatic line between gas pressure is shown below:
A
peak(ω)＝c(l,d,T,ω)×P(ω)
In formula, A
peakfor wire netting peak swing, ω is blow down valve switching frequency, P is gas pressure in pneumatic line, l is the distance of nozzle apart from wire netting center, d is the bore of nozzle, T is the tension force of wire netting, and c is the proportionality coefficient of wire netting peak swing and pneumatic line pressure, and this proportionality coefficient changes with the change of parameter l, d, T, ω.
See Fig. 1, wire netting of the present invention micro-vibration PIM test macro comprises atmospheric control, vibration measurement with laser system, PIM testing apparatus, wire netting and PIM case, and described wire netting is arranged in described PIM case; Compressed Gas is introduced in PIM case by the nonferromagnetic material pneumatic line of described atmospheric control by described PIM test macro, to implement air-operated drive to wire netting; Under different parameters state, by described vibration measurement with laser system, the proportionality coefficient of gas pressure in the peak swing of described wire netting and described pneumatic line is demarcated; Described PIM test macro utilizes the proportionality coefficient demarcated to control the amplitude of wire netting and frequency is vibrated in-orbit to simulate wire netting, and utilizes described PIM testing apparatus to carry out micro-vibration PIM to wire netting to test.
Described atmospheric control comprises described nonferromagnetic material pneumatic line, strainer valve, Pressure gauge, blow down valve and controller, described strainer valve is arranged on described nonferromagnetic material pneumatic line for filtering the impurity in Compressed Gas, described Pressure gauge is for monitoring the gas pressure in described pneumatic line, described blow down valve is arranged on to purge the gas in pneumatic line on described nonferromagnetic material pneumatic line, and described controller controls the switching frequency of described blow down valve.
Described nonferromagnetic material pneumatic line is preferably plastic cement pneumatic line, the end of described plastic cement pneumatic line is provided with a nonferromagnetic material (as plastic cement) nozzle, described nonferromagnetic material nozzle enters in described PIM case, implements air-operated drive to be introduced in PIM case by described plastic jet nozzle by described Compressed Gas to wire netting.Also be provided with a nonferromagnetic material support in described PIM case, described nonferromagnetic material nozzle is fixed in described PIM case by described nonferromagnetic material support, and determines the distance at described nozzle and wire netting center by the position adjusting described support.
Timing signal is being carried out to the proportionality coefficient c of wire netting peak swing and pneumatic line pressure, measurement target drone is pasted at wire netting center, adjust different blow down valve switching frequencies, nozzle is apart from the distance at wire netting center, the bore of nozzle and wire netting tension force, vibration measurement with laser system (being preferably non-contact laser vibration measuring system) utilizes described target to measure the peak swing of wire netting, by gas pressure in described gauge measurement pneumatic line, thus formation shows proportionality coefficient c and blow down valve switching frequency, nozzle is apart from the distance at wire netting center, the calibrating parameters table of relation between the bore of nozzle and wire netting tension force.
When wire netting micro-vibration PIM tests, remove vibration measurement with laser system, and described target is removed from described wire netting center; According to described calibrating parameters table, adjustment parameter (namely adjusting blow down valve switching frequency, nozzle apart from the distance at wire netting center, the bore of nozzle and wire netting tension force) is vibrated in-orbit to simulate wire netting, and then carries out wire netting micro-vibration PIM by described PIM testing apparatus and test.
Fig. 2 is another composition form schematic diagram of wire netting of the present invention micro-vibration PIM test macro, wherein, atmospheric control can also comprise nonferromagnetic material pneumatic line, coarse filtration valve, break valve, filtering pressure reducing valve, Pressure gauge, the first blow down valve (i.e. blow down valve 1 in Fig. 2), the second blow down valve (i.e. blow down valve 2 in Fig. 2) and controller.Described break valve is for controlling the opening and closing of described nonferromagnetic material pneumatic line, first through coarse filtration valve, coarse filtration is carried out to impurity in gas after Compressed Gas enters described pneumatic line, then through described break valve, through described filtering pressure reducing valve, impurity in gas is filtered further again, to guarantee that in gas, impurity is filtered totally; Described Pressure gauge is at described filtering pressure reducing valve place measurement gas pressure; Described pneumatic line is divided into two branch roads subsequently, is connected through the first blow down valve and the second blow down valve respectively, and after the first blow down valve and the second blow down valve, two branch roads are combined into a road again, and introduces in PIM case through described pneumatic line.Described controller controls on off state and the switching frequency of described first blow down valve and the second blow down valve.Preferably, described first blow down valve is pre-set and the second blow down valve is different switching frequency.Operationally, described controller can control a wherein blow down valve according to actual needs and, with its switching frequency operation, makes another blow down valve be in closed condition; And switch (even another blow down valve above-mentioned is with its switching frequency operation to both operating states according to actual needs, a blow down valve of former work is made to be in closed condition), and described controller can set the switching frequency of first, second blow down valve according to actual needs in real time.Atmospheric control can be enable promptly to switch the purging frequency of gas by such arranging, improve the response speed of system, and when wherein a blow down valve breaks down, can be cut out and be used another blow down valve, being improve the stability of system.
See Fig. 3, the flow process of wire netting of the present invention micro-vibration PIM method of testing mainly comprises:
(1) atmospheric control is set up, and by the nonferromagnetic material pneumatic line of atmospheric control access PIM case; Described atmospheric control comprises nonferromagnetic material (as plastic cement) pneumatic line, strainer valve, Pressure gauge, blow down valve and controller;
(2) set up, debug vibration measurement with laser system, and paste the peak swing of measurement target drone for described vibration measurement with laser systematic survey wire netting at described wire netting center;
(3) atmospheric control work, through strainer valve, impurity in gas is filtered after Compressed Gas enters pneumatic line, then purge through blow down valve, enter PIM case finally by nonferromagnetic material (as the plastic cement) nozzle being arranged on pneumatic line end and air-operated drive is implemented to wire netting; The switching frequency of described blow down valve controls by described controller, and the pressure of gas in described pneumatic line monitored by described Pressure gauge;
(4) by vibration measurement with laser system, under different parameters state, (namely different blow down valve switching frequencies, nozzle are apart from the distance at wire netting center, the bore of nozzle and wire netting tension force) is demarcated the proportionality coefficient of wire netting peak swing and loine pressure, forms calibrating parameters table;
(5) remove vibration measurement with laser system, and described target is removed from described wire netting center, set up, debug PIM testing apparatus;
(6) according to described calibrating parameters table, adjustment parameter (namely adjusting blow down valve switching frequency, nozzle apart from the distance at wire netting center, the bore of nozzle and wire netting tension force) is vibrated in-orbit to simulate wire netting;
(7) carry out wire netting micro-vibration PIM by described PIM testing apparatus to test.
Wherein, be also provided with a nonferromagnetic material support in described PIM case, described nozzle is fixed in described PIM case by described nonferromagnetic material support, and determines the distance at described nozzle and wire netting center by the position adjusting described support.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (8)
1. spaceborne duplexer wire netting micro-vibration PIM test macro, comprises atmospheric control, vibration measurement with laser system, PIM testing apparatus, wire netting and PIM case, and described wire netting is arranged in described PIM case;
Described atmospheric control comprises nonferromagnetic material pneumatic line, strainer valve, Pressure gauge, blow down valve and controller, described strainer valve is arranged on described nonferromagnetic material pneumatic line for filtering the impurity in Compressed Gas, described Pressure gauge is for monitoring the gas pressure in described pneumatic line, described blow down valve is arranged on described nonferromagnetic material pneumatic line to purge the gas in pneumatic line, described controller controls the switching frequency of described blow down valve, Compressed Gas is introduced in PIM case by nonferromagnetic material pneumatic line by described atmospheric control, to implement air-operated drive to wire netting, and by the switching frequency changing gas pressure size and blow down valve in pneumatic line, the vibration amplitude size of wire netting and frequency are controlled,
Described vibration measurement with laser system, under different parameters state, is demarcated the proportionality coefficient of gas pressure in the peak swing of described wire netting and described pneumatic line;
Described atmospheric control utilizes the proportionality coefficient demarcated, and the amplitude and the frequency that control wire netting are vibrated in-orbit to simulate wire netting;
Described PIM testing apparatus carries out micro-vibration PIM to wire netting to be tested.
2. spaceborne duplexer wire netting as claimed in claim 1 micro-vibration PIM test macro, it is characterized in that: described nonferromagnetic material pneumatic line is plastic cement pneumatic line, the end of described plastic cement pneumatic line is provided with a nonferromagnetic material nozzle, described nonferromagnetic material nozzle enters in described PIM case, to introduce in PIM case by described Compressed Gas, air-operated drive is implemented to wire netting.
3. spaceborne duplexer wire netting as claimed in claim 2 micro-vibration PIM test macro, it is characterized in that: in described PIM case, be also provided with a nonferromagnetic material support, described nonferromagnetic material nozzle is fixed in described PIM case by described nonferromagnetic material support, and determines the distance at described nozzle and wire netting center by the position adjusting described support.
4. spaceborne duplexer wire netting as claimed in claim 3 micro-vibration PIM test macro, is characterized in that: described parameter is that blow down valve switching frequency, described nozzle are apart from the distance at wire netting center, the bore of described nozzle and wire netting tension force.
5. spaceborne duplexer wire netting micro-vibration PIM method of testing, comprises the following steps:
(1) set up atmospheric control, be provided with in the PIM case of described wire netting in the nonferromagnetic material pneumatic line of atmospheric control is accessed;
(2) set up, debug vibration measurement with laser system;
(3) atmospheric control work, Compressed Gas is introduced in described PIM case by described nonferromagnetic material pneumatic line, implements air-operated drive to described wire netting;
(4) by described vibration measurement with laser system, under different parameters state, the proportionality coefficient of gas pressure in the peak swing of described wire netting and described pneumatic line is demarcated, form calibrating parameters table;
(5) remove vibration measurement with laser system, set up, debug PIM testing apparatus;
(6) according to described calibrating parameters table, adjust described parameter and vibrate in-orbit to simulate wire netting;
(7) carry out wire netting micro-vibration PIM by described PIM testing apparatus to test.
Described atmospheric control comprises described nonferromagnetic material pneumatic line, strainer valve, Pressure gauge, blow down valve and controller, through strainer valve, impurity in gas is filtered after Compressed Gas enters described pneumatic line, then purge through blow down valve, enter PIM case finally by the nonferromagnetic material nozzle being arranged on pneumatic line end and air-operated drive is implemented to wire netting; The switching frequency of described blow down valve controls by described controller, and the pressure of gas in described pneumatic line monitored by described Pressure gauge.
6. spaceborne duplexer wire netting as claimed in claim 5 micro-vibration PIM method of testing, it is characterized in that: described nonferromagnetic material pneumatic line is plastic cement pipeline, described nonferromagnetic material nozzle is plastic jet nozzle.
7. spaceborne duplexer wire netting as claimed in claim 6 micro-vibration PIM method of testing, is characterized in that: described parameter is that blow down valve switching frequency, described nozzle are apart from the distance at wire netting center, the bore of described nozzle and wire netting tension force.
8. spaceborne duplexer wire netting as claimed in claim 5 micro-vibration PIM method of testing, it is characterized in that: carrying out proportionality coefficient timing signal, the peak swing that measurement target drone is used for described vibration measurement with laser systematic survey wire netting is pasted at described wire netting center, when removing vibration measurement with laser system, also described target is removed from described wire netting center.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108199790A (en) * | 2017-11-29 | 2018-06-22 | 西安空间无线电技术研究所 | The waveguide test system and test method of a kind of passive intermodulation of metal net performance |
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| US20100295533A1 (en) * | 2006-09-06 | 2010-11-25 | Yokohama National University | Passive intermodulation distortion measuring method and system |
| CN102841276A (en) * | 2012-08-24 | 2012-12-26 | 西安空间无线电技术研究所 | Method for testing passive intermodulation of metal net |
| CN104101807A (en) * | 2014-07-22 | 2014-10-15 | 中国电子科技集团公司第四十一研究所 | Self intermodulation inhibition method for transmission passive intermodulation (PIM) test |
| CN104776974A (en) * | 2015-04-07 | 2015-07-15 | 西南交通大学 | Non-contact pneumatic excitation device |
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2015
- 2015-11-19 CN CN201510809218.6A patent/CN105375999B/en active Active
Patent Citations (4)
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| US20100295533A1 (en) * | 2006-09-06 | 2010-11-25 | Yokohama National University | Passive intermodulation distortion measuring method and system |
| CN102841276A (en) * | 2012-08-24 | 2012-12-26 | 西安空间无线电技术研究所 | Method for testing passive intermodulation of metal net |
| CN104101807A (en) * | 2014-07-22 | 2014-10-15 | 中国电子科技集团公司第四十一研究所 | Self intermodulation inhibition method for transmission passive intermodulation (PIM) test |
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| CN108199790A (en) * | 2017-11-29 | 2018-06-22 | 西安空间无线电技术研究所 | The waveguide test system and test method of a kind of passive intermodulation of metal net performance |
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