CN111536391B - Plane three-degree-of-freedom simulation air floating platform and operation method thereof - Google Patents

Plane three-degree-of-freedom simulation air floating platform and operation method thereof Download PDF

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CN111536391B
CN111536391B CN202010448625.XA CN202010448625A CN111536391B CN 111536391 B CN111536391 B CN 111536391B CN 202010448625 A CN202010448625 A CN 202010448625A CN 111536391 B CN111536391 B CN 111536391B
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air
carbon fiber
pressure
plane
degree
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CN111536391A (en
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李宗峰
卓志钦
李新峰
向东
冯振华
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Technology and Engineering Center for Space Utilization of CAS
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Technology and Engineering Center for Space Utilization of CAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
    • B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F16C32/0618—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via porous material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F16C32/0622—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via nozzles, restrictors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F16M11/2035—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction
    • F16M11/2064—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction for tilting and panning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F16M11/2035—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction
    • F16M11/2078—Undercarriages with or without wheels comprising means allowing pivoting adjustment in more than one direction with ball-joint
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/14—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of aluminium; constructed of non-magnetic steel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/02—Pipe-line systems for gases or vapours
    • F17D1/065—Arrangements for producing propulsion of gases or vapours
    • F17D1/075—Arrangements for producing propulsion of gases or vapours by mere expansion from an initial pressure level, e.g. by arrangement of a flow-control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D3/00—Arrangements for supervising or controlling working operations
    • F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0646—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/031—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/01—Purifying the fluid
    • F17C2265/012—Purifying the fluid by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0186—Applications for fluid transport or storage in the air or in space

Abstract

The invention provides a planar three-degree-of-freedom simulation air bearing table and an operation method thereof, wherein the planar three-degree-of-freedom simulation air bearing table comprises a load supporting unit, a spiral fine adjustment unit, a high-pressure air storage system and a low-pressure air supply system; the load supporting unit comprises a glass fiber load plane, a carbon fiber first bottom plate, a carbon fiber second bottom plate, a rectangular shell, a horizontal carbon fiber pipe, an assembling assembly, an inclined carbon fiber pipe and a vertical carbon fiber pipe; the spiral fine adjustment unit comprises a plane air bearing, a ball head screw rod and a nut. Has the advantages that: the planar three-degree-of-freedom simulation air floating platform provided by the invention realizes three-degree-of-freedom motion of two translation motions and one rotation motion; the volume is small, the structure is compact, the composite material and the triangular symmetrical configuration are adopted, the integral structure is light, and the load capacity is large; the invention adopts the design of a replaceable load plane, and can carry out a simulation experiment only by fixing the satellite to be verified to the glass fiber load plane of the air bearing table by using the tool, thereby improving the universality of the air bearing table.

Description

Plane three-degree-of-freedom simulation air floating platform and operation method thereof
Technical Field
The invention belongs to the technical field of aerospace application, and particularly relates to a planar three-degree-of-freedom simulation air bearing platform and an operation method thereof.
Background
In the field of aerospace, effective ground simulation experiments are necessary before the aerial vehicle enters the orbit, and the method mainly adopted at present is to utilize an air bearing table with multiple degrees of freedom to carry out microgravity simulation. Specifically, the air bearing table is widely applied to physical simulation tests of space equipment such as precision instruments and space vehicles, is a core device of a physical simulation system, and has the working principle that: the air floating platform forms an air film between the air floating bearing and the bearing seat by means of compressed air, so that the air floating platform floats, relative motion conditions which are approximate to frictionless are realized, and a mechanical environment with small interference torque of a satellite in space is simulated.
The air bearing table in the prior art mainly has the following problems: (1) the traditional satellite three-axis simulation air bearing table provides three rotational degrees of freedom, is generally called as an AP (access point) platform, and cannot independently verify the plane movement degree of freedom of a test load; (2) the traditional air floating platform is integrally designed with a spacecraft, so that the air floating platform cannot be detached and used independently, and each type of spacecraft needs to be simulated by a set of special experimental air floating platform, so that the universality of the air floating platform is poor; (3) the traditional air bearing table is often large in size and limited by air storage capacity, so that the simulation time is short.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a planar three-degree-of-freedom simulation air bearing table and an operation method thereof, which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides a planar three-degree-of-freedom simulation air bearing table, which comprises a load supporting unit (100), a spiral fine adjustment unit (200), a high-pressure air storage system (300) and a low-pressure air supply system (400);
the load support unit (100) comprises a glass fiber load plane (101), a carbon fiber first bottom plate (102), a carbon fiber second bottom plate (103), a rectangular shell (104), a horizontal carbon fiber pipe (105), an assembly component (106), an inclined carbon fiber pipe (107) and a vertical carbon fiber pipe (108);
the carbon fiber first bottom plate (102) is in an equilateral triangle shape and is provided with three angular points, and the rectangular shell (104) is fixedly installed above each angular point; the carbon fiber second bottom plate (103) is provided with three top angles in an equilateral triangle layout, the carbon fiber second bottom plate (103) is arranged above each rectangular shell (104), and each top angle position of the carbon fiber second bottom plate (103) is fixed with the rectangular shell (104); arranging three horizontal carbon fiber tubes (105) in a triangular layout between the carbon fiber first bottom plate (102) and the carbon fiber second bottom plate (103), wherein one end of each horizontal carbon fiber tube (105) is fixed with the side surface of the rectangular shell (104), the other end of each horizontal carbon fiber tube (105) points to the center of a triangle, the assembling assembly (106) is arranged at the center of the triangle, and the other ends of the three horizontal carbon fiber tubes (105) are assembled and fixed through the assembling assembly (106);
the glass fiber loading plane (101) is horizontally arranged above the carbon fiber second bottom plate (103), three inclined carbon fiber tubes (107) in a triangular layout are dispersedly arranged between the glass fiber loading plane (101) and the carbon fiber second bottom plate (103), the bottom of each inclined carbon fiber tube (107) is fixed with the top surface of the rectangular shell (104), the top surface of each inclined carbon fiber tube (107) is fixed with the glass fiber loading plane (101), and the inclined carbon fiber tubes (107) are inclined 45-degree carbon fiber tubes; -between the glass fibre load plane (101) and the carbon fibre second bottom plate (103), also fixing two of the vertical carbon fibre tubes (108);
the spiral fine adjustment unit (200) comprises a plane air bearing (201), a ball head screw (202) and a nut (203); the plane air bearing (201) is horizontally arranged below each rectangular shell (104); the ball head screw (202) is vertically arranged, the ball head part of the ball head screw (202) is embedded into a central hole of the plane air bearing (201), a screw part of the ball head screw (202) is screwed into an internal thread hole of the rectangular shell (104), and after the height of the screw part of the ball head screw (202) is adjusted to be in place, the nut (203) is screwed outside the ball head screw (202);
the high-pressure gas storage system (300) comprises a high-pressure gas cylinder (301), a gas cylinder bracket (302), a stainless steel band (303), a quick gas charging connector (304), a high-pressure gas cylinder adapter (305) and a high-pressure gas cylinder gas transmission pipe (306); for three rectangular shells (104) respectively arranged at the vertex angles of the equilateral triangle, one high-pressure gas cylinder (301) is arranged between the connecting lines of any two rectangular shells (104), so that the three high-pressure gas cylinders (301) are respectively arranged at one edge of the equilateral triangle; each high-pressure gas cylinder (301) is mounted with the carbon fiber first base plate (102) and the carbon fiber second base plate (103) through the gas cylinder bracket (302); the stainless steel band (303) is sleeved outside the high-pressure gas cylinder (301) for further strengthening and fixing; the high-pressure gas cylinder adapter (305) is installed at the opening of each high-pressure gas cylinder (301), each high-pressure gas cylinder adapter (305) is connected with one end of each high-pressure gas cylinder air conveying pipe (306), and the other end of each high-pressure gas cylinder air conveying pipe (306) is converged to a main air conveying pipe; one end of the quick inflation connector (304) is used for being connected with an external air source, and the other end of the quick inflation connector (304) is connected to the total air conveying pipe and used for inflating each high-pressure air bottle (301);
the low pressure air supply system (400) comprises an integrated two-stage pressure reducing valve (401), a first stop valve (402), an air filter (403), and a second stop valve (404); the integrated double-stage pressure reducing valve (401) is arranged in the middle of the integral structure of the planar three-degree-of-freedom simulation air floating table, and an air supply port of the main air conveying pipe is communicated with an air inlet of the integrated double-stage pressure reducing valve (401); the air outlet of the integrated two-stage pressure reducing valve (401) is connected to the air inlet of the air filter (403) after passing through the first stop valve (402); the air outlet of the air filter (403) is communicated with the air inlet of each plane air bearing (201) through a hose; the air outlet of the air filter (403) is also communicated with an AP platform air supply port (405) through the second stop valve (404).
Preferably, a plurality of mounting holes are formed in the glass fiber loading plane (101), and nylon screws are used for realizing the insulation connection and fixation between the glass fiber loading plane (101) and the spacecraft to be verified.
Preferably, the plane air bearing (201) is made of graphite porous materials.
Preferably, the quick-fill connector (304) comprises a high-pressure quick-fill male (304A) and a high-pressure quick-fill female (304B); the high-pressure quick inflation male head (304A) is installed on the load supporting unit (100), and the high-pressure quick inflation female head (304B) is connected with an external air source through an inflation hose.
Preferably, the high pressure quick fill male (304A) is mounted above a quick fill shut off valve, which in turn is mounted to the underside of the carbon fiber first base plate (102).
Preferably, the diameter of a circle formed by three plane air bearings (201) is 518 mm.
Preferably, the high-pressure gas cylinder (301) is an aluminum alloy carbon fiber-added composite gas cylinder.
The invention also provides an operation method of the plane three-degree-of-freedom simulation air bearing table, which comprises the following steps:
step 1, fixing a spacecraft to be verified on the surface of a glass fiber loading plane (101) through a nylon screw;
step 2, placing the planar three-degree-of-freedom simulation air bearing table on an operation table top, finely adjusting the height of a ball screw (202) at each angular point position, further adjusting the height of each planar air bearing (201), finally realizing adjustment of the levelness of the glass fiber load plane (101), and ensuring that the levelness of the glass fiber load plane (101) meets the operation precision requirement;
step 3, connecting one end of the quick inflation connector (304) with an external air source, and supplying air to each high-pressure air bottle (301) through the external air source until the high-pressure air bottle is full of air;
step 4, performing a physical simulation test on the space aircraft, and supplying air in the following mode in the process of performing the physical simulation test:
after the gas stored in the three high-pressure gas cylinders (301) is gathered together through the main gas transmission pipe, the gas is decompressed through the integrated two-stage decompression valve (401), so that the pressure of the gas is reduced to the range of 0-1 Mpa; then, the decompressed gas is filtered by an air filter (403) and is respectively conveyed to each plane air-floatation bearing (201), and the plane air-floatation bearings (201) downwards spray stable airflow through tiny air holes to form an air film to realize air floatation; two translation degrees of freedom and one rotation degree of freedom are realized through the planar three-degree-of-freedom simulation air floating platform.
The plane three-degree-of-freedom simulation air bearing table and the operation method thereof provided by the invention have the following advantages:
the plane three-degree-of-freedom simulation air floating platform provided by the invention realizes three-degree-of-freedom motion of two translation motions and one rotation motion; the device has small volume and compact structure, adopts composite materials and a special triangular symmetrical configuration, and has light integral structure and large load capacity;
the invention adopts the design of a replaceable load plane, and can carry out a simulation experiment only by fixing the satellite to be verified to the glass fiber load plane of the air bearing table by using the tool, thereby improving the universality of the air bearing table.
Drawings
FIG. 1 is a schematic diagram of a gas path of a planar three-degree-of-freedom simulation gas floating platform provided by the present invention;
FIG. 2 is a schematic top view of a planar three-degree-of-freedom simulated air bearing table provided by the present invention;
FIG. 3 is a schematic side view of a planar three-degree-of-freedom simulated air bearing table according to the present invention;
FIG. 4 is an overall structure diagram of a planar three-degree-of-freedom simulation air bearing table provided by the present invention;
FIG. 5 is a side view structural diagram of a planar three-degree-of-freedom simulation air bearing table provided by the present invention;
FIG. 6 is a top view structural diagram of a planar three-degree-of-freedom simulation air bearing table provided by the present invention;
FIG. 7 is a structural diagram of a load supporting unit of the planar three-degree-of-freedom simulation air bearing table provided by the present invention;
FIG. 8 is an assembly view of a ball screw and nut provided by the present invention;
FIG. 9 is a diagram of the positional relationship of a horizontal carbon fiber tube and related components provided by the present invention;
fig. 10 is a bottom view of the planar three-degree-of-freedom simulation air bearing table provided by the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a planar three-degree-of-freedom simulation air bearing table, belongs to the field of aerospace application, is mainly used for ground simulation experiments for verifying satellite operation control technology, can realize two translational motions plus one rotational degree of freedom, and has the advantages of small volume, light weight, large bearing range and long experiment time.
The three-degree-of-freedom simulation air floating platform can mainly run on a plane with high flatness requirement, and forms an air film with the plane through air injection in a self-carried air bottle to simulate a microgravity three-degree-of-freedom simulation experiment. The plane three-degree-of-freedom simulation air floating platform can carry space vehicles including but not limited to a microsatellite, an attitude three-axis platform and the like, and can verify a control algorithm of space flight, a formation flight control algorithm and the like.
Referring to fig. 1, 2, 4-6, the planar three-degree-of-freedom simulation air bearing table includes a load supporting unit 100, a spiral fine tuning unit 200, a high-pressure air storage system 300, and a low-pressure air supply system 400. The following details the various units:
load supporting unit 100
The load supporting unit 100 is used as a support of the whole air bearing table, not only is each part loaded, but also is loaded, the invention adopts carbon fiber pipes and plates, a connecting piece adopts aluminum alloy machining, the carbon fiber plates and the carbon fiber pipes are in lap joint, the carbon fiber pipes are fixed in a clamping mode, a load plane is supported by three inclined 45-degree and two vertical carbon fiber pipes, the bottom surface is paved by the carbon fiber plates and the carbon fiber pipes, and the integral structure is also installed in a triangular mode. The structure of the table body adopts triangular symmetrical installation, and the support is also a triangular stable structure, so that the table body has light weight and stable structure.
Referring to fig. 7, the load support unit 100 includes a glass fiber load plane 101, a carbon fiber first base plate 102, a carbon fiber second base plate 103, a rectangular housing 104, a horizontal carbon fiber tube 105, a fitting assembly 106, an oblique carbon fiber tube 107, and a vertical carbon fiber tube 108;
the carbon fiber first base plate 102 is in an equilateral triangle shape and is provided with three angular points, and a rectangular shell 104 is fixedly installed above each angular point; the carbon fiber second bottom plate 103 has three vertex angles in an equilateral triangle layout, the carbon fiber second bottom plate 103 is arranged above each rectangular shell 104, and each vertex angle position of the carbon fiber second bottom plate 103 is fixed with the rectangular shell 104; three horizontal carbon fiber tubes 105 which are arranged in a triangular shape are arranged between the carbon fiber first bottom plate 102 and the carbon fiber second bottom plate 103, one end of each horizontal carbon fiber tube 105 is fixed with the side surface of the rectangular shell 104, the other end of each horizontal carbon fiber tube 105 points to the center of the triangle, an assembling assembly 106 is arranged at the center of the triangle, and the other ends of the three horizontal carbon fiber tubes 105 are assembled and fixed through the assembling assembly 106;
the glass fiber loading plane 101 is horizontally arranged above the carbon fiber second bottom plate 103, a plurality of mounting holes are formed in the glass fiber loading plane 101, and the glass fiber loading plane 101 and the to-be-verified spacecraft are fixedly connected in an insulating mode through nylon screws.
Three inclined carbon fiber tubes 107 in a triangular layout are dispersedly arranged between the glass fiber loading plane 101 and the carbon fiber second bottom plate 103, referring to fig. 9, the bottom of each inclined carbon fiber tube 107 is fixed with the top surface of the rectangular shell 104, the top surface of each inclined carbon fiber tube 107 is fixed with the glass fiber loading plane 101, and the inclined carbon fiber tubes 107 are inclined 45-degree carbon fiber tubes; two vertical carbon fiber tubes 108 are also fixed between the glass fiber load plane 101 and the carbon fiber second bottom plate 103;
(II) helical trimming Unit 200
Referring to fig. 8 and 3, the spiral fine-tuning unit 200 is used for adjusting the height of the air bearing platform and the levelness of the load plane, and comprises a plane air bearing 201, a ball screw 202 and a nut 203;
a plane air bearing 201 is horizontally arranged below each rectangular shell 104; the ball head screw 202 is vertically arranged, the ball head part of the ball head screw 202 is embedded into the central hole of the plane air bearing 201, the screw part of the ball head screw 202 is screwed into the internal thread hole of the rectangular shell 104, and when the height of the screw part of the ball head screw 202 is adjusted in place, the nut 203 is screwed outside the ball head screw 202;
the planar air bearing 201 plays a main role in supporting air floatation, adopts a graphite porous material, and sprays stable air flow downwards through tiny air holes to form an air film, so that air floatation is realized, stable supporting force is provided for air floatation, and air utilization is saved.
In the invention, the plane air bearing 201 is connected with the platform body mainly by the ball head screw 202, and the ball head of the ball head screw 202 can enable the plane air bearing to realize vertical stress, so that the overturning moment caused by unbalance loading is reduced; the height of the table body can be adjusted through the screw rods, the nuts on the screw rods play a locking role, and the levelness of the load plane of the air bearing table can be adjusted through the three ball-head screw rods.
(III) high pressure gas storage System 300
The high-pressure gas storage system is used for storing compressed gas and mainly comprises three high-pressure gas cylinders and connecting pipelines. The connecting pipeline consists of a stainless steel manifold and a connecting clamping sleeve, and meanwhile, the connecting pipeline is also provided with a special air inlet and a stop valve so as to be convenient for inflation. The whole pressure-resistant device can resist more than 30MPa, the three gas cylinders are arranged on the support in an equilateral triangle mode, the connecting pipeline penetrates through the bottom of the support, and the stop valve of the gas inlet is arranged on the bottom plate.
Specifically, referring to fig. 2 and 4, the high-pressure gas storage system 300 includes a high-pressure gas cylinder 301, a gas cylinder bracket 302, a stainless steel band 303, a quick inflation connector 304, a high-pressure gas cylinder adapter 305, and a high-pressure gas cylinder gas pipe 306;
for three rectangular shells 104 respectively arranged at the vertex angles of the equilateral triangle, one high-pressure gas cylinder 301 is arranged between the connecting lines of any two rectangular shells 104, so that the three high-pressure gas cylinders 301 are respectively arranged at one edge of the equilateral triangle; the high-pressure gas cylinder 301 is a composite gas cylinder of aluminum alloy and carbon fiber.
Each high-pressure gas cylinder 301 is mounted with the carbon fiber first base plate 102 and the carbon fiber second base plate 103 through a gas cylinder bracket 302; the stainless steel band 303 is sleeved outside the high-pressure gas cylinder 301 for further strengthening and fixing; referring to fig. 10, a high-pressure gas cylinder adapter 305 is mounted on the mouth of each high-pressure gas cylinder 301, each high-pressure gas cylinder adapter 305 is connected to one end of a high-pressure gas cylinder gas transmission pipe 306, and the other end of the high-pressure gas cylinder gas transmission pipe 306 is converged to a main gas transmission pipe; one end of the quick air charging connector 304 is used for being connected with an external air source, and the other end of the quick air charging connector 304 is connected to a main air conveying pipe and used for charging air into each high-pressure air bottle 301;
wherein the quick inflation connector 304 comprises a high pressure quick inflation male head 304A and a high pressure quick inflation female head 304B; the high-pressure quick-inflation male head 304A is mounted on the load support unit 100, and the high-pressure quick-inflation female head 304B is connected with an external air source through an inflation hose. More specifically, the high pressure quick fill male 304A is mounted above a quick fill shut off valve, which in turn is mounted to the underside of the carbon fiber first base plate 102.
The quick inflation connector design adopts a pair of high pressure quick connectors (male and female), the male is installed on the stage body, and the female is installed on the inflation hose. Stop valves are arranged at the gas cylinder end and the inflation end and are respectively used for cutting off gas flow and releasing pressure, dangerous disassembly and assembly with pressure of the quick connector are prevented, and inflation pressure below 30MPa can be realized. Therefore, the quick inflation connector is used for connecting the air pump to inflate high-pressure air into the high-pressure air bottle of the air floating platform, and comprises a high-pressure hose, a quick-break connector, a pressure release valve and the like; one end of the pressure relief valve is connected with a gas source such as an inflator pump, and the other end of the pressure relief valve is connected with a gas inlet of a high-pressure gas cylinder of the gas floating platform through a quick-break connector, so that quick connection and disconnection are realized, the pressure relief valve is used for relieving pressure after gas inflation is completed, and the quick-break connector is prevented from being pressed and detached.
(IV) Low pressure gas supply System 400
The low-pressure gas supply system 400 is used for reducing the pressure of high-pressure gas to the pressure required by the planar air bearing, and mainly adopts a high-pressure integrated two-stage pressure reducing valve which can reduce the pressure of 30MPa gas to about 0.5MPa, wherein the output pressure range of the high-pressure integrated two-stage pressure reducing valve is 0-1 MPa, and the two-stage pressure reducing valve is provided with a pressure release valve and is arranged in the middle of the integral structure of the planar air bearing platform through a specially designed bracket. In addition, the decompressed gas passes through an air filter, an oil-water separator and a plurality of stop valves, is connected to each plane air bearing through a hose, supplies air to the plane air bearings, and is reserved with an air outlet for supplying air to the AP platform.
Specifically, low pressure air supply system 400 includes an integrated dual stage pressure reducing valve 401, a first shut-off valve 402, an air filter 403, and a second shut-off valve 404; the integrated two-stage pressure reducing valve 401 is arranged in the middle of the integral structure of the planar three-degree-of-freedom simulation air bearing table, and an air supply port of a main air conveying pipe is communicated with an air inlet of the integrated two-stage pressure reducing valve 401; the outlet of integrated dual stage pressure relief valve 401 is connected to the inlet of air filter 403 after passing through first shut-off valve 402; the air outlet of the air filter 403 is communicated with the air inlet of each planar air bearing 201 through a hose; the air outlet of the air filter 403 is also in communication with an AP platform supply port 405 through a second shut-off valve 404. The diameter of the circle formed by the three plane air bearings 201 is 518 mm.
As a specific embodiment, the height of the load mounting surface of the air bearing platform from the ground is adjustable within the range of 205mm to 210mm, and as can be seen from figure 10, the high-pressure pipeline is mainly fixed on the lower part of the carbon fiber first bottom plate through a fixing piece. FIG. 6 is a top view of the air bearing table, the horizontal projection area of the air bearing table is not large, and the diameter of a circle formed by the centers of three plane air bearings is 518 mm.
The invention provides a plane three-degree-of-freedom simulation air bearing table which has the following characteristics:
(1) by utilizing new materials and configurations, the large bearing capacity is realized under the condition of low self weight, the influence of the self weight of the air floating platform body on the rotary inertia generated during the simulation of the aircraft is reduced, and the experimental time is prolonged.
(2) The novel composite material high-pressure gas cylinder and the high-precision two-stage integrated pressure reducing valve are utilized, the gas storage pressure of a unit gas cylinder is increased, more gases are carried, the longer simulation time is realized, meanwhile, the two-stage pressure reducing valve can reduce the high-pressure gas to an adjustable gas supply pressure range of 0-1 MPa, and the novel composite material high-pressure gas cylinder and the high-precision two-stage integrated pressure reducing valve are suitable for installation of various air bearing bearings.
(3) Realize the separation of satellite and air supporting stage body, the satellite that awaits verifying can directly pass through the nylon screw and install on glass fiber load plane, convenient dismantlement, and the cost is lower, and plane air supporting stage simple structure, a plane air supporting stage can provide the experiment for multiple space vehicles and verify, realizes being close the physical simulation in kind, makes the experiment more reliable.
(4) The device can be combined and detached with an attitude three-axis platform (AP platform), can verify planar three-degree-of-freedom and spatial rotation degree-of-freedom respectively, and can be combined into a five-degree-of-freedom experimental air bearing table to realize one multi-purpose.
(5) The integral supporting structure of the air bearing table is made of carbon fiber and glass fiber composite material profiles, and aluminum alloy workpieces are used at the joints, so that the strength and the rigidity of the structure are improved, and meanwhile, the lower cost is realized. The air supply system of the plane air bearing table adopts the design of three high-pressure air storage tanks, the whole volume reaches more than 7.5L, the whole structure is designed in a triangular symmetry mode, the triangular structure is fully utilized on a load supporting structure, the self weight is reduced, and the stability is improved.
(6) The load mounting plane of the air floating platform is made of glass fiber materials, the nylon screws are connected with the main body structure, and the interference of the conductive structure of the air floating platform body on the test load is reduced due to the insulation design.
(7) Viewed from the top view direction, the three high-pressure gas cylinders are installed in an equilateral triangle shape and are respectively installed on the connecting line of the two plane air-floating bearings, the pressure reducing valve is installed in the middle of the table body, and the air-floating bearings and the ball screw are installed at the positions of three angular points of the equilateral triangle.
The high-pressure pipeline is mainly arranged on the bottom plate; the ball head screw is arranged in the thread through holes reserved at the three corners, and the height can be adjusted up and down; the plane air bearing is arranged at the lower part of the ball screw; the high-pressure gas cylinder is fixed through a stainless steel belt and is arranged on a gas cylinder mounting bracket on the bottom plate; the air filter and the stop valve switch are arranged on a carbon fiber pipe of the rack through 3D printed parts; the double-stage integrated pressure reducing valve is arranged in the middle of the bottom plate through an aluminum alloy support on the bottom plate.
It should be noted that, after the table body is inflated, the stop valve on the quick coupling is closed, and high-pressure gas still exists in the inflation tube, at this time, the relief valve of the inflation pipeline is opened to release pressure, and the quick coupling is prohibited to be separated under a high-pressure condition.
The invention also provides an operation method of the plane three-degree-of-freedom simulation air bearing table, which comprises the following steps:
step 1, fixing a spacecraft to be verified on the surface of a glass fiber loading plane 101 through nylon screws;
step 2, placing the planar three-degree-of-freedom simulation air bearing table on an operation table, finely adjusting the height of the ball screw 202 at each angular point position, further adjusting the height of each planar air bearing 201, finally realizing adjustment of the levelness of the glass fiber load plane 101, and ensuring that the levelness of the glass fiber load plane 101 meets the operation precision requirement;
step 3, connecting one end of the quick inflation connector 304 with an external air source, and supplying air to each high-pressure air bottle 301 through the external air source until the high-pressure air bottle is full of air;
step 4, performing a physical simulation test on the space aircraft, and supplying air in the following mode in the process of performing the physical simulation test:
after the gas stored in the three high-pressure gas cylinders 301 is gathered together through the main gas transmission pipe, the gas is decompressed through the integrated two-stage decompression valve 401, and the gas is decompressed to the range of 0-1 Mpa; then, the decompressed gas is filtered by an air filter 403 and then is respectively conveyed to each plane air bearing 201, and the plane air bearings 201 downwards eject stable airflow through tiny air holes to form an air film to realize air floatation; two translation degrees of freedom and one rotation degree of freedom are realized through the planar three-degree-of-freedom simulation air floating platform.
Compared with the traditional rotary three-degree-of-freedom platform, the plane three-degree-of-freedom simulation air floating platform and the operation method thereof provided by the invention have the following advantages:
the plane three-degree-of-freedom simulation air floating platform provided by the invention realizes three-degree-of-freedom motion of two translation motions and one rotation motion; the aluminum alloy plate is small in size and compact in structure, adopts a composite material and a special triangular symmetrical configuration, is light in overall structure, has a body structure below 15kg, is high in load capacity, can load more than 100kg, and is different from the traditional aluminum alloy plane design;
the invention adopts the design of a replaceable load plane, and can carry out a simulation experiment only by fixing the satellite to be verified to the glass fiber load plane of the air bearing table by using a tool, thereby improving the universality of the air bearing table;
the high-precision integrated two-stage pressure reducing valve is small in size, light in weight and high in efficiency, and can effectively reduce the pressure of 30MPa gas to 0-1 MPa; the planar air bearing made of graphite porous material has low air consumption and can provide stable supporting force; the high-pressure gas cylinder wrapped by the composite material of the aluminum alloy liner adopts the high-pressure stainless steel clamping sleeve and the stainless steel pipe as the high-pressure connecting pipeline, the carried gas pressure can be loaded to 30MPa, more gas can be stored, and the experimental time is effectively prolonged to more than 60 minutes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.

Claims (8)

1. A planar three-degree-of-freedom simulation air bearing table is characterized by comprising a load supporting unit (100), a spiral fine adjustment unit (200), a high-pressure air storage system (300) and a low-pressure air supply system (400);
the load support unit (100) comprises a glass fiber load plane (101), a carbon fiber first bottom plate (102), a carbon fiber second bottom plate (103), a rectangular shell (104), a horizontal carbon fiber pipe (105), an assembly component (106), an inclined carbon fiber pipe (107) and a vertical carbon fiber pipe (108);
the carbon fiber first bottom plate (102) is in an equilateral triangle shape and is provided with three angular points, and the rectangular shell (104) is fixedly installed above each angular point; the carbon fiber second bottom plate (103) is provided with three top angles in an equilateral triangle layout, the carbon fiber second bottom plate (103) is arranged above each rectangular shell (104), and each top angle position of the carbon fiber second bottom plate (103) is fixed with the rectangular shell (104); arranging three horizontal carbon fiber tubes (105) in a triangular layout between the carbon fiber first bottom plate (102) and the carbon fiber second bottom plate (103), wherein one end of each horizontal carbon fiber tube (105) is fixed with the side surface of the rectangular shell (104), the other end of each horizontal carbon fiber tube (105) points to the center of a triangle, the assembling assembly (106) is arranged at the center of the triangle, and the other ends of the three horizontal carbon fiber tubes (105) are assembled and fixed through the assembling assembly (106);
the glass fiber loading plane (101) is horizontally arranged above the carbon fiber second bottom plate (103), three inclined carbon fiber tubes (107) in a triangular layout are dispersedly arranged between the glass fiber loading plane (101) and the carbon fiber second bottom plate (103), the bottom of each inclined carbon fiber tube (107) is fixed with the top surface of the rectangular shell (104), the top surface of each inclined carbon fiber tube (107) is fixed with the glass fiber loading plane (101), and the inclined carbon fiber tubes (107) are inclined 45-degree carbon fiber tubes; -between the glass fibre load plane (101) and the carbon fibre second bottom plate (103), also fixing two of the vertical carbon fibre tubes (108);
the spiral fine adjustment unit (200) comprises a plane air bearing (201), a ball head screw (202) and a nut (203); the plane air bearing (201) is horizontally arranged below each rectangular shell (104); the ball head screw (202) is vertically arranged, the ball head part of the ball head screw (202) is embedded into a central hole of the plane air bearing (201), a screw part of the ball head screw (202) is screwed into an internal thread hole of the rectangular shell (104), and after the height of the screw part of the ball head screw (202) is adjusted to be in place, the nut (203) is screwed outside the ball head screw (202);
the high-pressure gas storage system (300) comprises a high-pressure gas cylinder (301), a gas cylinder bracket (302), a stainless steel band (303), a quick gas charging connector (304), a high-pressure gas cylinder adapter (305) and a high-pressure gas cylinder gas transmission pipe (306); for three rectangular shells (104) respectively arranged at the vertex angles of the equilateral triangle, one high-pressure gas cylinder (301) is arranged between the connecting lines of any two rectangular shells (104), so that the three high-pressure gas cylinders (301) are respectively arranged at one edge of the equilateral triangle; each high-pressure gas cylinder (301) is mounted with the carbon fiber first base plate (102) and the carbon fiber second base plate (103) through the gas cylinder bracket (302); the stainless steel band (303) is sleeved outside the high-pressure gas cylinder (301) for further strengthening and fixing; the high-pressure gas cylinder adapter (305) is installed at the opening of each high-pressure gas cylinder (301), each high-pressure gas cylinder adapter (305) is connected with one end of each high-pressure gas cylinder air conveying pipe (306), and the other end of each high-pressure gas cylinder air conveying pipe (306) is converged to a main air conveying pipe; one end of the quick inflation connector (304) is used for being connected with an external air source, and the other end of the quick inflation connector (304) is connected to the total air conveying pipe and used for inflating each high-pressure air bottle (301);
the low pressure air supply system (400) comprises an integrated two-stage pressure reducing valve (401), a first stop valve (402), an air filter (403), and a second stop valve (404); the integrated double-stage pressure reducing valve (401) is arranged in the middle of the integral structure of the planar three-degree-of-freedom simulation air floating table, and an air supply port of the main air conveying pipe is communicated with an air inlet of the integrated double-stage pressure reducing valve (401); the air outlet of the integrated two-stage pressure reducing valve (401) is connected to the air inlet of the air filter (403) after passing through the first stop valve (402); the air outlet of the air filter (403) is communicated with the air inlet of each plane air bearing (201) through a hose; the air outlet of the air filter (403) is also communicated with an AP platform air supply port (405) through the second stop valve (404).
2. The planar three-degree-of-freedom simulation air bearing table according to claim 1 is characterized in that the glass fiber load plane (101) is provided with a plurality of mounting holes, and nylon screws are adopted to realize insulation connection and fixation between the glass fiber load plane (101) and a spacecraft to be verified.
3. The planar three-degree-of-freedom simulation air bearing table according to claim 1, wherein the planar air bearing (201) is made of graphite porous material.
4. The planar three-degree-of-freedom simulation air bearing table according to claim 1, wherein the quick inflation joint (304) comprises a high-pressure quick inflation male head (304A) and a high-pressure quick inflation female head (304B); the high-pressure quick inflation male head (304A) is installed on the load supporting unit (100), and the high-pressure quick inflation female head (304B) is connected with an external air source through an inflation hose.
5. The planar three-degree-of-freedom simulation air bearing table according to claim 4, wherein the high-pressure quick inflation male head (304A) is installed on a quick inflation stop valve, and the quick inflation stop valve is installed on the bottom surface of the carbon fiber first base plate (102).
6. The planar three-degree-of-freedom simulation air bearing table according to claim 1, wherein a circle formed by three planar air bearings (201) has a diameter of 518 mm.
7. The planar three-degree-of-freedom simulation air bearing table according to claim 1, wherein the high-pressure air cylinder (301) is a composite air cylinder of aluminum alloy and carbon fiber.
8. A method of operating a planar three-degree-of-freedom simulated air bearing table according to any one of claims 1 to 7, comprising the steps of:
step 1, fixing a spacecraft to be verified on the surface of a glass fiber loading plane (101) through a nylon screw;
step 2, placing the planar three-degree-of-freedom simulation air bearing table on an operation table top, finely adjusting the height of a ball screw (202) at each angular point position, further adjusting the height of each planar air bearing (201), finally realizing adjustment of the levelness of the glass fiber load plane (101), and ensuring that the levelness of the glass fiber load plane (101) meets the operation precision requirement;
step 3, connecting one end of the quick inflation connector (304) with an external air source, and supplying air to each high-pressure air bottle (301) through the external air source until the high-pressure air bottle is full of air;
step 4, performing a physical simulation test on the space aircraft, and supplying air in the following mode in the process of performing the physical simulation test:
after the gas stored in the three high-pressure gas cylinders (301) is gathered together through the main gas transmission pipe, the gas is decompressed through the integrated two-stage decompression valve (401), so that the pressure of the gas is reduced to the range of 0-1 Mpa; then, the decompressed gas is filtered by an air filter (403) and is respectively conveyed to each plane air-floatation bearing (201), and the plane air-floatation bearings (201) downwards spray stable airflow through tiny air holes to form an air film to realize air floatation; two translation degrees of freedom and one rotation degree of freedom are realized through the planar three-degree-of-freedom simulation air floating platform.
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