CN207197761U - A kind of micro-vibration source ground survey system containing gravity unloading - Google Patents
A kind of micro-vibration source ground survey system containing gravity unloading Download PDFInfo
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- CN207197761U CN207197761U CN201721106793.0U CN201721106793U CN207197761U CN 207197761 U CN207197761 U CN 207197761U CN 201721106793 U CN201721106793 U CN 201721106793U CN 207197761 U CN207197761 U CN 207197761U
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Abstract
A kind of micro-vibration source ground survey system containing gravity unloading, including ground, air spring, ground vibration-isolating platform stage body, portal frame, portal frame adaptor, six component force platforms, six component force platform adaptors, air-bearing, simulating piece connector, flexible structure simulating piece and supply tracheae.For spacecraft large-scale flexible part ground micro-vibration test, it is necessary to be produce micro-vibration critical piece all in the state of gravity unloading, could effectively measure its micro-vibration characteristic as far as possible.The utility model emphasis solves the problems, such as to unload carrying force influence in gravitational field.
Description
Technical field
A kind of micro-vibration source ground survey system containing gravity unloading is the utility model is related to, suitable for compliant member
The micro-vibration source dynamic characteristic to slowly run ground survey, belong to space flight micro-vibration source ground survey field.
Background technology
As the performance indications such as remote sensing satellite resolution ratio improve, micro-vibration influences problem to image quality gradually turns into restriction
The key issue of remote sensing satellite performance boost.Space flight micro-vibration problem is related to several aspects, including micro-vibration to sensitive load shadow
Loud simulation analysis, micro-vibration ground survey and verification experimental verification, micro-vibration vibration isolation and vibration suppression and Related product and method
In-orbit application.Wherein micro-vibration ground survey has consequence with verification experimental verification, plays a part of forming a connecting link, a side
Face provides necessary input and model for simulation analysis, and verification experimental verification is on the one hand carried out before Spacecraft Launch, it is ensured that related
The reliability and validity of product and technology.
In micro-vibration ground survey and verification experimental verification technology, the ground survey in micro-vibration source is extremely important.Micro-vibration source
Ground survey can provide input to sensitive load simulation analysis for micro-vibration.The frequency characteristic and related amplitude value pair in micro-vibration source
Final solution has conclusive influence.
Drive mechanism with large-scale flexible parts such as solar wings on spacecraft rotates and compliant member can be caused to vibrate, so as to
Producing larger micro-vibration to spacecraft influences.Because the design of electrical motor of drive mechanism drives for in-orbit part, weight is not considered
Power influences, therefore during ground experiment, because gravity influences, its drive mechanism drives the vibration characteristics of compliant member to differ with in-orbit
Sample, it is therefore desirable to design a kind of micro-vibration characteristic ground survey system that can unload carrying force.
The utility model is on the basis of prior art deposit, for the gravity unloading problem in the ground test of micro-vibration source
It is improved, improves the validity and precision of micro-vibration source ground survey result.
Utility model content
Technology of the present utility model solves problem：Overcome the deficiencies in the prior art, there is provided a kind of containing gravity unloading
Micro-vibration source ground survey system.
Technical solution of the present utility model is：
A kind of micro-vibration source ground survey system containing gravity unloading, including put down including ground, air spring, ground vibration isolation
Platform stage body, portal frame, portal frame adaptor, six component force platforms, six component force platform adaptors, air-bearing, simulation
Part connector, flexible structure simulating piece and supply tracheae；
Ground vibration-isolating platform stage body is fixedly mounted on ground by air spring, and air spring is provided by supplying tracheae
Voltage stabilizing gas, portal frame are fixedly mounted on ground vibration-isolating platform stage body, and portal frame adaptor is fixedly mounted on the top of portal frame
Portion, six component force platforms are suspended on portal frame by portal frame adaptor, will be by by six component force platform adaptors
Micrometer vibration source is fixedly mounted on six component force platforms；
Simulating piece connector connects flexible structure simulating piece with air-bearing, and tested micro-vibration source passes through air-bearing shafts
Driving flexible structure simulating piece is held to rotate.
Ground vibration-isolating platform stage body section is T-shaped, and upper surface is rectangle.
Air-bearing includes air-bearing support member, air-bearing stator, air-bearing rotor and air pipe line；
Air-bearing stator is fixed on portal frame adaptor by air-bearing support member, and air-bearing rotor is from air supporting
Passed through among bearing stator, be between the two high pressure air film, relative without Frictional Slipping, air pipe line is used to supply to air-bearing
Gas.
By adjusting the position of air-bearing support member, and then it is gentle to adjust tested micro-vibration source, flexible structure simulating piece
Floating axle hold between relative position so that tested micro-vibration source is in vertical equilbrium position.
The tested micro-vibration source is motor.
Flexible structure simulating piece is that solar wing structural simulation part or number pass antenna structure simulating piece.
The air-bearing forms two layers of air film, one layer of active force altogether for radially double thrust air-bearings, the air-bearing
To be vertical, one layer of active force is radially.
The beneficial effect of the utility model compared with prior art is：
(1) the utility model uses radially double thrust air-bearings, the axial off-loadable flexible accessory part driving machine of air supporting
Structure influences in vertical gravity, while radial direction air supporting can cause the approximate of driving flexible accessory part of rotating mechanism to turn without friction
Dynamic, both collective effects can effectively simulate the operation on orbit state of large-scale flexible accessory components drive mechanism, ensure big to driving
The drive mechanism of type flexible accessory part produces effective measurement of micro-vibration.
(2) the utility model uses ground vibration-isolating platform, can be effectively isolated the vibration transmitted on ground and measurement result is done
Disturb.The frequency of the micro-vibration of drive mechanism with large-scale flexible annex is relatively low, is approached with the main frequency of earth shock.If not
Isolate the influence of earth shock, necessarily cause the difference of ground survey result and in-orbit real work situation.
(3) the utility model uses six component force platforms, can measure the drive mechanism with large-scale flexible annex simultaneously
Caused three direction force for acting on its mounting surface and three yawning moments, it is identical with in-orbit real work situation, can
Ensure that measurement result can accurately reflect in-orbit real work situation.
(4) the utility model uses flexible structure simulating piece, can avoid due to part practical structures it is too big caused by can not
The problem of measurement, simultaneously because operating space in portal frame can be ensured by design, therefore the flexible structure mould of design can be ensured
It is as far as possible close with practical structures to intend part architectural characteristic.
Brief description of the drawings
Fig. 1 is the utility model ground survey system schematic；
Fig. 2 is radially double thrust air-bearing shafts principle schematics.
Embodiment
Specific embodiment of the present utility model is further described in detail below in conjunction with the accompanying drawings.
The utility model emphasis solves the problems, such as to unload carrying force influence in gravitational field.For spacecraft large-scale flexible part
The experiment of face micro-vibration, it is necessary to be the critical piece for producing micro-vibration all in the state of gravity unloading, could be as effective as possible
Measure its micro-vibration characteristic.For spacecraft large-scale flexible part driving micro-vibration problem, its micro-vibration mechanism of production be by
Rotated in motor driving large-scale flexible part, compliant member vibration reacts on driving structure so as to spacecraft itself band
The micro-vibration come.Drive mechanism is designed for in-orbit operating mode, i.e., the environment of no gravity.If do not adopted under ground environment
Appropriate action is taken, motor stress form and in-orbit difference can be caused, so as to cause its micro-vibration characteristic to be differed very with in-orbit
Greatly.
The utility model is got up large-scale flexible member supporting using double thrust radial direction air-bearings, when consolidating for air-bearing
When having frequency and the intrinsic frequency of air film more than measurement range requirement, swashed due to the rotation of large-scale flexible member driving mechanism
The vibration risen will be delivered to by air-bearing on six component force platforms.Air supporting hydrostatic bearing (air-bearing) is extraordinary axle
Hold, main feature has：
(1) minimum friction, in any velocity interval for going for extremely low speed~hypervelocity；
(2) operating accuracy is high, and temperature rise is small；
(3) working range is very wide, especially suitable for being worked under adverse circumstances；
(4) it is pollution-free.
Concrete form of the present utility model is as shown in Figure 1.Ground vibration-isolating platform is designed first to isolate the shadow of ground vibration
Ring.Then portal frame is arranged on ground vibration-isolating platform.The rigidity of portal frame needs well-designed to ensure that it refuses system
Middle other structures or the coupling of the frequency of vibration source, while avoid the frequency range of measurement relation.Then utilize portal frame adaptor will
Together with six component force platforms are rigidly connected to as far as possible with portal frame.Large-scale flexible part is installed on six component force platforms
Drive mechanism.Linked together between drive mechanism and large-scale flexible part by double thrust radial direction air-bearings.Air-bearing shafts
Hold and linked together by air-bearing support member with portal frame.By the position for adjusting air-bearing support member, it is ensured that driving
Relative position relation between motor, large-scale flexible part and air-bearing, so that motor is in vertical equilbrium position.This
Sample, when large-scale flexible member driving mechanism works, due to the supporting role of air-bearing, not by the shadow of large-scale flexible part gravity
Ring, with operation on orbit state consistency.
Core component of the present utility model is double thrust radial direction air-bearings, and its principle is as shown in Fig. 2 mainly by air-bearing shafts
21st, air supporting set 22, envelope gas spindle 23, support ringfeder 24 and flow controller 25 form.Double thrust radial direction air-bearings are connect by sealing gas
Axle 23 and external connection, envelope gas spindle 23 are ventilated, and gas sprays through flow controller 25, are formed between air-bearing shafts 21 and air supporting set 22
Air film so that between air-bearing shafts 21 and air supporting set 22 can approximate friction free rotate, form radial direction double thrust bearing.Should
Air-bearing forms two layers of air film altogether, and one layer of active force is axial direction, for supporting air-bearing shafts, while unloads large-scale flexible part
Gravity；One layer of active force is radial direction, for the approximate frictionless environment on rotation direction is ensured.
Some key parameters of air-bearing can determine by the following method.
For Circular Thrust bearing, node pressure side F, the bearing capacity W of cell cube can be tried to achieve according to N-S equationseAnd centering
The torque M of the hearte, summed to obtain total bearing capacity W of gas bearing and total carrying torque M further according to the position of each unito。
Journal bearing static characteristic is analyzed more complicated than thrust bearing more, and it is an individual cylinder that this, which is primarily due to air film,.
In most cases, the air-film thickness of cylindrical bearing is very small compared with its diameter, therefore, usually can be bearing surface
Curvature is omitted, and the error caused by omitting curvature is about one thousandth or so.Specific practice is as follows：It is flat by air film exhibition
Face, finite element is then divided, solve discrete pressure distribution equation, finally provide bearings power and rigidity.
As shown in figure 1, the utility model includes ground 1, air spring 2, ground vibration-isolating platform table top 3, portal frame 4, dragon
Door frame adaptor 5, six component force platforms 6, six component force platform adaptors 7, tested micro-vibration source 8, air-bearing support
Part 9, air-bearing stator 10, air-bearing rotor 11, air pipe line 12, simulating piece connector 13 and the driving of tested micro-vibration source
Flexible structure simulating piece 14.Air spring 2 is fixedly mounted on ground 1.Ground vibration-isolating platform stage body 3 is solid with air spring 2
Fixed connection.Air spring 2 provides voltage stabilizing gas by supplying tracheae 12.The lower end of portal frame 4 is fixedly mounted on ground vibration isolation and put down
On platform table top 3.Portal frame adaptor 5 is fixedly mounted on the upper center of portal frame 4.Six component force platforms 6 pass through portal frame
Adaptor 5 is fixed on portal frame 4.Tested micro-vibration source 8 is fixedly mounted on six points by six component force platform adaptors 7
Measure on force plate/platform 6.Air-bearing stator 10 is fixed on portal frame adaptor 5 by air-bearing support member 9.Air-bearing
Rotor 11 is passed through among air-bearing stator 10, and both are connected by high pressure air film, relatively can be without Frictional Slipping.High pressure air film
There are two kinds, a kind of between centers for being used for air-bearing rotor 11 and air-bearing stator 10 is a kind of to be used for air-bearing shafts without Frictional Slipping
Forward son 11 and tested micro-vibration source 8 connection one end lower plane and air-bearing stator 10 upper plane face between without friction slide
It is dynamic.Air pipe line 12 is used to supply to air-bearing.The flexible structure that simulating piece connector 13 then drives tested micro-vibration source
Simulating piece 14 connects with air-bearing rotor 11.
The content not being described in detail in the utility model specification belongs to techniques known.
Claims (7)
- A kind of 1. micro-vibration source ground survey system containing gravity unloading, it is characterised in that：Including including ground (1), air bullet Spring (2), ground vibration-isolating platform stage body (3), portal frame (4), portal frame adaptor (5), six component force platforms (6), six components Force plate/platform adaptor (7), air-bearing, simulating piece connector (13), flexible structure simulating piece (14) and supply tracheae (15)；Ground vibration-isolating platform stage body (3) is fixedly mounted on ground (1) by air spring (2), and air spring (2) passes through supply Tracheae (15) provides voltage stabilizing gas, and portal frame (4) is fixedly mounted on ground vibration-isolating platform stage body (3), portal frame adaptor (5) The top of portal frame (4) is fixedly mounted on, six component force platforms (6) are suspended on portal frame (4) by portal frame adaptor (5) On, tested micro-vibration source (8) is fixedly mounted on six component force platforms (6) by six component force platform adaptors (7)；Simulating piece connector (13) connects flexible structure simulating piece (14) with air-bearing, and it is logical to be tested micro-vibration source (8) Air-bearing driving flexible structure simulating piece (14) is crossed to rotate.
- A kind of 2. micro-vibration source ground survey system containing gravity unloading according to claim 1, it is characterised in that：Ground Vibration-isolating platform stage body (3) section is T-shaped, and upper surface is rectangle.
- A kind of 3. micro-vibration source ground survey system containing gravity unloading according to claim 1, it is characterised in that：Air supporting Bearing includes air-bearing support member (9), air-bearing stator (10), air-bearing rotor (11) and air pipe line (12)；Air-bearing stator (10) is fixed on portal frame adaptor (5) by air-bearing support member (9), air-bearing rotor (11) passed through among air-bearing stator (10), be between the two high pressure air film, it is relative without Frictional Slipping, air pipe line (12) For being supplied to air-bearing.
- A kind of 4. micro-vibration source ground survey system containing gravity unloading according to claim 3, it is characterised in that：Pass through The position of air-bearing support member (9) is adjusted, and then adjusts tested micro-vibration source (8), flexible structure simulating piece (14) and air supporting Relative position between bearing so that tested micro-vibration source (8) are in vertical equilbrium position.
- A kind of 5. micro-vibration source ground survey system containing gravity unloading according to claim 4, it is characterised in that：It is described Tested micro-vibration source (8) are motor.
- A kind of 6. micro-vibration source ground survey system containing gravity unloading according to claim 4, it is characterised in that：It is flexible Structural simulation part (14) is that solar wing structural simulation part or number pass antenna structure simulating piece.
- A kind of 7. micro-vibration source ground survey system containing gravity unloading according to claim 1 or 3, it is characterised in that： The air-bearing is radially double thrust air-bearings, and the air-bearing forms two layers of air film altogether, one layer of active force be it is vertical, one Layer active force is radially.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721106793.0U CN207197761U (en) | 2017-08-31 | 2017-08-31 | A kind of micro-vibration source ground survey system containing gravity unloading |
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| CN201721106793.0U CN207197761U (en) | 2017-08-31 | 2017-08-31 | A kind of micro-vibration source ground survey system containing gravity unloading |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907138A (en) * | 2019-12-04 | 2020-03-24 | 哈尔滨恒信精密气浮科技有限公司 | Air floatation detection tower with supporting points arranged at center of mass |
| CN112197927A (en) * | 2020-10-10 | 2021-01-08 | 北京航宇振控科技有限责任公司 | Automatic air floatation support system applied to vibration simulation device |
| CN112556957A (en) * | 2020-12-04 | 2021-03-26 | 中国直升机设计研究所 | Transmission characteristic test device for liquid elastic vibration isolation system |
| CN113029416A (en) * | 2021-04-08 | 2021-06-25 | 哈尔滨工业大学 | Six-dimensional force measuring device based on gas lubrication mechanical decoupling |
| CN113340404A (en) * | 2021-06-21 | 2021-09-03 | 上海航天计算机技术研究所 | Low-vacuum modal measuring device for flexible antenna |
-
2017
- 2017-08-31 CN CN201721106793.0U patent/CN207197761U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907138A (en) * | 2019-12-04 | 2020-03-24 | 哈尔滨恒信精密气浮科技有限公司 | Air floatation detection tower with supporting points arranged at center of mass |
| CN112197927A (en) * | 2020-10-10 | 2021-01-08 | 北京航宇振控科技有限责任公司 | Automatic air floatation support system applied to vibration simulation device |
| CN112556957A (en) * | 2020-12-04 | 2021-03-26 | 中国直升机设计研究所 | Transmission characteristic test device for liquid elastic vibration isolation system |
| CN113029416A (en) * | 2021-04-08 | 2021-06-25 | 哈尔滨工业大学 | Six-dimensional force measuring device based on gas lubrication mechanical decoupling |
| CN113340404A (en) * | 2021-06-21 | 2021-09-03 | 上海航天计算机技术研究所 | Low-vacuum modal measuring device for flexible antenna |
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