A deployment test fixture and system suitable for cradle-style stowed SAR antennas

Abstract

The utility model relates to a kind of deployment test tool and its system suitable for cradle type folding SAR antenna, and relate to satellite manufacturing technical field.The deployment test tool suitable for cradle type folding SAR antenna includes adapter frame assembly, rotary hanger ring, adjustment table assembly, rocker arm frame assembly and hanging assembly;Rocker arm frame assembly includes first rocker arm frame assembly and second rocker arm frame assembly;Adjustment table assembly can change the position of first rocker arm frame assembly and second rocker arm frame assembly relative to adapter frame assembly;Adapter frame assembly, first rocker arm frame assembly and second rocker arm frame assembly are stacked in turn;The bottom of first rocker arm frame assembly and second rocker arm frame assembly is respectively connected with hanging assembly.The deployment test system includes deployment test tool suitable for cradle type folding SAR antenna.The utility model provides a kind of deployment test tool and its system suitable for cradle type folding SAR antenna, to be able to compensate for antenna gravity when ground deployment test, so that the on-orbit deployment process of antenna can be simulated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of satellite manufacturing, in particular to a deployment test tool suitable for a cradle-type folded SAR antenna and a system thereof. BACKGROUND

[0002] The cradle-type folded SAR (Synthetic Aperture Radar) antenna is directly connected with a satellite platform, and two side deployment sub-arrays are folded on the same side of the body sub-array. In the on-orbit state, the two side deployment sub-arrays are deployed on both sides of the body sub-array, and the three sub-array panels form a coplanar. The cradle-type folded SAR antenna has the advantages that the antenna is simple to integrate with the satellite platform during the assembly, and the height of the satellite platform is not affected by the size of the antenna, which is convenient for multiple satellite layout and adaptation to more launch envelope spaces. Figure 1 and Figure 2 As shown in the figures, the antenna comprises a body sub-array 91 and two side deployment sub-arrays 92 connected with the body sub-array 91, Figure 1 In the cradle-type folded state, the satellite platform 9 is connected with the body sub-array 91, and the two side deployment sub-arrays 92 are folded on the same side of the body sub-array 91. Figure 2 In the deployed state, the satellite platform 9 is connected with the body sub-array 91, and the two side deployment sub-arrays 92 are deployed on both sides of the body sub-array 91.

[0003] The cradle-type folded SAR antenna determines that the deployment sequence of the two side deployment sub-arrays needs to be controlled during the deployment of the antenna. The outermost deployment sub-array needs to be deployed first, and then the middle deployment sub-array needs to be deployed, so as to prevent collision caused by simultaneous deployment.

[0004] During the ground deployment test of the cradle-type folded SAR antenna, a zero-gravity unloading system needs to be built to simulate the weightlessness of the antenna in the on-orbit state. A special deployment tool is needed to simulate the on-orbit deployment process of the antenna and to keep the gravity compensation of the antenna at all times during the deployment process, so as to prevent the deployment mechanism of the antenna from being affected by external force and affecting the deployment precision. SUMMARY

[0005] The present application aims to provide a deployment test tool suitable for a cradle-type folded SAR antenna and a system thereof, so as to simulate the on-orbit deployment process of the antenna by compensating the gravity of the antenna during the ground deployment test.

[0006] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A deployment test tool suitable for a cradle-type folded SAR antenna, comprising an adapter frame assembly, a rotating hanger ring, an adjustment table assembly, a rocker arm frame assembly and a hanger assembly; the deployment test tool has a first direction, a second direction and a height direction which are perpendicular to each other;

[0008] Along the second direction, the adapter frame assembly includes corresponding first and second surfaces; the first surface of the adapter frame assembly is provided with an installation and fixing structure; the rotating lifting ring and the adjusting platform assembly are both connected to the second surface of the adapter frame assembly, and the rotating lifting ring is connected to the top of the adapter frame assembly;

[0009] The rocker arm frame assembly includes a first rocker arm frame assembly and a second rocker arm frame assembly; along the first direction, the adjustment platform assembly is connected between the first rocker arm frame assembly and one side of the adapter frame assembly, and the adjustment platform assembly is connected between the second rocker arm frame assembly and the other side of the adapter frame assembly; the adjustment platform assembly is configured to be adjustable to change the position of the first rocker arm frame assembly and the second rocker arm frame assembly relative to the adapter frame assembly;

[0010] The first rocker arm frame assembly and the second rocker arm frame assembly are rotatably connected to the corresponding adjustment platform assembly, so that the adapter frame assembly, the first rocker arm frame assembly and the second rocker arm assembly are stacked in sequence;

[0011] The bottom of the first rocker arm frame assembly and the bottom of the second rocker arm frame assembly are respectively connected to a plurality of the hanging assemblies.

[0012] In any of the above technical solutions, optionally, the adapter frame assembly includes an adapter frame axis extending along the height direction, and the adapter frame axis is the axis of symmetry of the adapter frame assembly;

[0013] The second side of the adapter frame assembly is fixedly connected to an adjustment adapter plate; at least four corners of the adapter frame assembly are provided with adjustment adapter plates; the overall distribution of all the adjustment adapter plates is symmetrical about the axis of the adapter frame.

[0014] Each of the adjustment adapter plates has a pair of adjustment blocks fixedly connected to the side facing away from the adapter frame assembly; each adjustment block is screwed with an adjustment pin; the axis of the adjustment pin is parallel to the first direction;

[0015] The adjustment platform assembly includes an adjustment body and an adjustment plate; the adjustment plate is fixedly connected to both ends of the adjustment body along the height direction;

[0016] The adjusting plate is connected to the adjusting adapter plate, and the adjusting plate is located between the paired adjusting blocks, with the adjusting pin abutting against the side of the adjusting plate.

[0017] Optionally, in any of the above technical solutions, the adjusting plate is provided with a first adjusting plate hole; the first adjusting plate hole is elongated; the fastener passes through the first adjusting plate hole and is screwed to the adjusting adapter plate; the length direction of the first adjusting plate hole is parallel to the first direction.

[0018] Optionally, in any of the above technical solutions, a bearing seat is fixedly connected to the side of the adjusting plate opposite to the adjusting adapter plate; a bearing is installed inside the bearing seat.

[0019] Along the height direction, both ends of the rocker arm frame assembly are rotatably connected to the corresponding bearings;

[0020] A plumb bob is fixedly connected to the bearing housing located at the bottom of the adapter frame assembly; the plumb bob extends axially along the bearing housing.

[0021] In any of the above technical solutions, optionally, the first rocker arm frame assembly and the second rocker arm frame assembly both include a rocker arm frame, an auxiliary arm, and a rotating shaft;

[0022] When the adapter frame assembly, the first rocker arm frame assembly, and the second rocker arm frame assembly are stacked in sequence, the auxiliary arm is fixedly connected to the side of the rocker arm frame near the adapter frame assembly;

[0023] Along the height direction, both ends of the auxiliary arm are inserted with a pivot, and the side wall of the auxiliary arm is screwed with a set screw that abuts against the pivot.

[0024] The rotating shaft is inserted into the bearing housing, and the bearing is connected between the rotating shaft and the bearing housing.

[0025] Optionally, in any of the above technical solutions, the distance between the pivot of the first rocker arm frame assembly and the adapter frame assembly is less than the distance between the pivot of the second rocker arm frame assembly and the adapter frame assembly.

[0026] In any of the above technical solutions, optionally, the adapter frame assembly includes an adapter frame axis extending along the height direction, and the adapter frame axis is the axis of symmetry of the adapter frame assembly;

[0027] The mounting and fixing structure includes multiple mounting plates; the overall distribution of the multiple mounting plates is symmetrical about the axis of the adapter frame.

[0028] The adjustment platform assemblies on both sides of the adapter frame assembly are symmetrically distributed about the adapter frame axis;

[0029] The number of rotating lifting rings is at least two, and the overall distribution of all the rotating lifting rings is symmetrical about the axis of the transition frame.

[0030] The overall distribution of all the aforementioned hanging components is symmetrical about the axis of the transition frame.

[0031] In any of the above technical solutions, the suspension assembly may optionally include a guide rail, a tension sensor, a hook, and a trolley seat;

[0032] The guide rail is fixedly connected to the bottom of the first rocker arm frame assembly or the bottom of the second rocker arm frame assembly; the trolley seat is slidably connected to the guide rail, and the tension sensor is connected between the trolley seat and the hook;

[0033] The axial direction of the hook is perpendicular to the axial direction of the guide rail.

[0034] In any of the above technical solutions, optionally, the hanging assembly further includes a turnbuckle; the turnbuckle is connected between the trolley seat and the tension sensor, and the turnbuckle is configured to adjust the distance between the trolley seat and the tension sensor;

[0035] A bearing connects the trolley seat to the guide rail.

[0036] A deployment test system includes the aforementioned deployment test fixture suitable for a folding SAR antenna.

[0037] The main beneficial effects of this invention are:

[0038] The present invention provides a deployment test fixture and system for a folding SAR antenna, comprising a transition frame assembly, a rotating lifting ring, an adjustment platform assembly, a rocker arm frame assembly, and a suspension assembly. The deployment test fixture can be moved by lifting the rotating lifting ring, for example, by using a crane to lift the rotating lifting ring to move the deployment test fixture to a preset position. The deployment test fixture can be mounted on a zero-gravity truss or other fixtures via the mounting and fixing structure provided on the first side of the transition frame assembly. One deployable subarray of the antenna is suspended by the suspension assembly at the bottom of the first rocker arm frame assembly, and the second rocker arm frame assembly is suspended by the suspension assembly at the bottom of the second rocker arm frame assembly. The suspension assembly suspends another deployable subarray of the antenna to compensate for gravity in the two deployable subarrays of the antenna through the suspension method, simulating the weightlessness state of the antenna in orbit and realizing the sequential deployment process of the antenna; through the adjustment platform assembly, fine-tuning can be performed during assembly and docking with the antenna to finely adjust the attitude of the first rocker arm frame assembly and the second rocker arm frame assembly, thereby finely adjusting the attitude of the two deployable subarrays of the antenna to achieve a greater degree of unloading of the antenna's own weight, so as to compensate for the antenna's gravity during ground deployment testing and to simulate the antenna's in-orbit deployment process as much as possible.

[0039] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of an existing folding SAR antenna in its folded state.

[0042] Figure 2 A schematic diagram of the deployed state of an existing folding SAR antenna;

[0043] Figure 3 A schematic diagram of the structure of a deployment test fixture for a folding SAR antenna provided in an embodiment of the present invention;

[0044] Figure 4 for Figure 3 An exploded view of the deployment test fixture suitable for a folding SAR antenna shown.

[0045] Figure 5 This is a schematic diagram of the structure of the adapter frame assembly provided in an embodiment of the present invention;

[0046] Figure 6 This is a partial enlarged view of the adapter frame assembly provided in an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of the structure of the adjustment stage assembly provided in an embodiment of the present invention;

[0048] Figure 8 This is a partial enlarged view of the adjustment stage assembly provided in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the rocker arm frame assembly provided in an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the rocker arm frame assembly provided in an embodiment of the present invention from another perspective.

[0051] Figure 11 This is a schematic diagram of the rocker arm frame provided in an embodiment of the present invention;

[0052] Figure 12 This is a schematic diagram of the structure of the hanging assembly provided in an embodiment of the present invention;

[0053] Figure 13 This is a schematic diagram illustrating the cooperation between the adjustment platform assembly and the adapter frame assembly provided in an embodiment of the present invention.

[0054] Figure 14 This is another schematic diagram showing the cooperation between the adjustment platform assembly and the adapter frame assembly provided in an embodiment of the present invention;

[0055] Figure 15 A schematic diagram illustrating the debugging of a deployment test fixture for a folding SAR antenna provided in an embodiment of the present invention;

[0056] Figure 16 This is a schematic diagram of the installation of a deployment test fixture for a folding SAR antenna provided in an embodiment of the present invention.

[0057] Figure 17 A schematic diagram illustrating the application of the deployment test fixture for a folding SAR antenna provided in an embodiment of the present invention;

[0058] Figure 18 This is another application diagram of the deployment test fixture for a folding SAR antenna provided in an embodiment of the present invention.

[0059] Icons: 1-Adapter frame assembly; 11-Mounting plate; 12-Adjusting adapter plate; 13-Adjusting block; 14-Adjusting pin; 2-Rotating ring; 3-Adjusting platform assembly; 31-Adjusting plate; 311-First adjusting plate hole; 312-Bearing seat mounting hole; 313-Keyway hole; 32-Bearing seat; 33-Bearing; 34-Plumb bob; 4-Rock arm frame assembly; 41-Auxiliary arm; 411-Spindle interface; 42-Set screw; 43-Spindle; 44-Rock arm frame; 441-Guide rail mounting interface; 5-Suspension assembly; 51-Guide rail; 52-Turn bolt; 53-Tension sensor; 54-Hook; 55-Trolley seat; 56-Guide rail connector;

[0060] 9-Star platform; 91-Body equipment subarray; 92-Expanding subarray. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0062] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0063] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0064] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0065] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0066] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] When testing the ground deployment of a retractable SAR antenna, a zero-gravity unloading system needs to be built to simulate the antenna's weightless state in orbit. Specialized deployment fixtures are required to simulate the antenna's in-orbit deployment process and to continuously compensate for gravity loads on the antenna during deployment, preventing external force wear on the deployment mechanism from affecting deployment accuracy. For convenient gravity unloading during ground deployment testing, the entire satellite is adjusted to the following attitude: the antenna's radiating surface is parallel to the horizontal plane, and the antenna hinge rotation axis (around which the deployment subarray rotates to deploy the antenna) is strictly perpendicular to the horizontal plane. When the suspension force of the fixture on the deployment subarray equals the weight of the deployment subarray, and the force passes through the center of mass of the antenna subarray, the antenna hinge rotation axis is not subjected to any force.

[0068] This embodiment provides a deployment test fixture suitable for a folding SAR antenna. Since the SAR antenna has two hinged rotation axes that open 180° to both sides during deployment, two rocker arm assemblies are designed. This fixture uses a suspension method to compensate for the antenna's gravity, simulating the antenna's weightlessness in orbit, thus enabling the antenna to unfold sequentially. The fixture includes a fine-tuning mechanism, allowing for precise attitude adjustments during later assembly and antenna docking, achieving greater unloading of the antenna's own weight and protecting the hinged rotation axes from external wear. The fixture is simple and quick to assemble and adjust, and can be used on zero-gravity trusses or other types of fixtures.

[0069] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0070] See Figures 3-18 As shown, the deployment test fixture for a folding SAR antenna provided in this embodiment (hereinafter referred to as the deployment test fixture) includes an adapter frame assembly 1, a rotating ring 2, an adjustment platform assembly 3, a rocker arm frame assembly 4, and a hanging assembly 5; the deployment test fixture has a first direction, a second direction, and a height direction that are perpendicular to each other; wherein, the height direction is perpendicular to the horizontal plane, and the plane formed by the first direction and the second direction is parallel to the horizontal plane.

[0071] Along the second direction, the adapter frame assembly 1 includes corresponding first and second surfaces; the first surface of the adapter frame assembly 1 is provided with an installation and fixing structure; the rotating lifting ring 2 and the adjusting platform assembly 3 are both connected to the second surface of the adapter frame assembly 1, and the rotating lifting ring 2 is connected to the top of the adapter frame assembly 1; by hoisting the rotating lifting ring 2, the deployment test fixture can be moved to the vicinity of the zero-gravity truss or other fixtures, thereby facilitating the installation of the deployment test fixture on the zero-gravity truss or other fixtures. By setting the installation and fixing structure on the first surface of the adapter frame assembly 1, and setting the rotating lifting ring 2 and the adjusting platform assembly 3 on the second surface of the adapter frame assembly 1, the deployment test fixture is made more stable when installed on the zero-gravity truss or other fixtures.

[0072] The rocker arm frame assembly 4 includes a first rocker arm frame assembly and a second rocker arm frame assembly; along a first direction, an adjustment platform assembly 3 is connected between the first rocker arm frame assembly and one side of the adapter frame assembly 1, and an adjustment platform assembly 3 is connected between the second rocker arm frame assembly and the other side of the adapter frame assembly 1; the adjustment platform assembly 3 is configured to be adjustable to change the position of the first rocker arm frame assembly and the second rocker arm frame assembly relative to the adapter frame assembly 1.

[0073] The first rocker arm frame assembly and the second rocker arm frame assembly are rotatably connected to the corresponding adjustment platform assembly 3, so that the adapter frame assembly 1, the first rocker arm frame assembly and the second rocker arm frame assembly are stacked in sequence, so that the surface of the first rocker arm frame assembly and the surface of the second rocker arm frame assembly can be parallel to the second surface of the adapter frame assembly 1, respectively.

[0074] Several hanging components 5 are connected to the bottom of the first rocker arm frame assembly and the bottom of the second rocker arm frame assembly, respectively. For example, two hanging components 5 are connected to the bottom of the first rocker arm frame assembly and two hanging components 5 are connected to the bottom of the second rocker arm frame assembly; the two hanging components 5 connected to the first rocker arm frame assembly are symmetrically arranged with respect to the two hanging components 5 connected to the second rocker arm frame assembly.

[0075] The deployment test fixture for a folding SAR antenna described in this embodiment includes a transition frame assembly 1, a rotating lifting ring 2, an adjustment platform assembly 3, a rocker arm frame assembly 4, and a hanging assembly 5. The deployment test fixture can be moved by lifting the rotating lifting ring 2, for example, by using a crane to lift the rotating lifting ring 2 to move the deployment test fixture to a preset position. The deployment test fixture can be installed on a zero-gravity truss or other fixtures via the mounting and fixing structure provided on the first side of the transition frame assembly 1. One deployable subarray of the antenna is hoisted by the hanging assembly 5 at the bottom of the first rocker arm frame assembly, and the second rocker arm frame assembly... The bottom suspension assembly 5 suspends another deployable subarray of the antenna to compensate for gravity on the two deployable subarrays of the antenna by suspension, simulating the weightlessness state of the antenna in orbit and realizing the sequential deployment process of the antenna; through the adjustment platform assembly 3, fine-tuning can be performed during assembly and docking with the antenna to finely adjust the attitude of the first rocker arm frame assembly and the second rocker arm frame assembly, thereby finely adjusting the attitude of the two deployable subarrays of the antenna to achieve a greater degree of unloading of the antenna's own weight, so as to compensate for the antenna's gravity during ground deployment testing and to simulate the antenna's in-orbit deployment process as much as possible.

[0076] See Figures 3-7 , Figures 13-15 As shown, in an optional embodiment, the adapter frame assembly 1 includes an adapter frame axis extending along the height direction, and the adapter frame axis is the axis of symmetry of the adapter frame assembly 1.

[0077] The second side of the adapter frame assembly 1 is fixedly connected to an adjustment adapter plate 12; at least four corners of the adapter frame assembly 1 are provided with adjustment adapter plates 12; the overall distribution of all adjustment adapter plates 12 is symmetrical about the axis of the adapter frame.

[0078] Each adjustment adapter plate 12 has a pair of adjustment blocks 13 fixedly connected to the side facing away from the adapter frame assembly 1; each adjustment block 13 is screwed with an adjustment pin 14; the axis of the adjustment pin 14 is parallel to the first direction.

[0079] The adjustment platform assembly 3 includes an adjustment body and an adjustment plate 31; the adjustment plate 31 is fixedly connected to both ends of the adjustment body along the height direction.

[0080] The adjustment plate 31 is connected to the adjustment adapter plate 12, and the adjustment plate 31 is located between the paired adjustment blocks 13. The adjustment pins 14 abut against the side of the adjustment plate 31; that is, the adjustment pins 14 screwed onto the paired adjustment blocks 13 abut against the two sides of the adjustment plate 31 from both sides; wherein, the adjustment pins 14 abut against both sides of the adjustment plate 31 along the first direction. Through the adjustment pins 14, the adjustment plate 31 can be finely adjusted, thereby finely adjusting the attitude of the adjustment stage assembly 3, and precisely adjusting the attitudes of the first rocker arm frame assembly and the second rocker arm frame assembly, thereby enabling fine adjustment of the attitudes of the two deployed subarrays of the antenna, achieving a greater degree of unloading of the antenna's own weight. Optionally, as... Figure 13 and Figure 14 As shown, along the first direction, the adjustment plate 31 can be adjusted relative to the adapter frame assembly 1 by a preset distance, that is, the adjustment plate 31 can be adjusted relative to the adjustment adapter plate 12 by a preset distance, for example, ±7.5mm. Optionally, along the height direction, both ends of the first rocker arm frame assembly and the second rocker arm frame assembly are connected to adjustment table assemblies 3. The adjustment table assemblies 3 at both ends of the first rocker arm frame assembly cooperate to achieve a preset rotation angle of the first rocker arm frame assembly relative to the adapter frame assembly 1, for example, a preset rotation angle of ±0.7°; similarly, the adjustment table assemblies 3 at both ends of the second rocker arm frame assembly cooperate to achieve a preset rotation angle of the second rocker arm frame assembly relative to the adapter frame assembly 1, for example, a preset rotation angle of ±0.7°.

[0081] Optionally, the number of adjustment adapter plates 12 is four, and the four adjustment adapter plates 12 are located at the four corners of the adapter frame assembly 1.

[0082] See Figure 7 and Figure 8 As shown, in an optional embodiment, the adjusting plate 31 is provided with a first adjusting plate hole 311; the first adjusting plate hole 311 is elongated; a fastener passes through the first adjusting plate hole 311 and is screwed onto the adjusting adapter plate 12. The length direction of the first adjusting plate hole 311 is parallel to the first direction; that is, the size of the first adjusting plate hole 311 along the first direction is greater than the size of the first adjusting plate hole 311 along the height direction. Because the first adjusting plate hole 311 is elongated, the adjusting pin 14 can abut against the side of the adjusting plate 31 to finely adjust the position of the adjusting plate 31 on the adjusting adapter plate 12, thereby finely adjusting the posture of the adjusting table assembly 3, so as to finely adjust the respective postures of the first rocker arm frame assembly and the second rocker arm frame assembly.

[0083] See Figure 3 , Figure 4 and Figure 7As shown, in the optional embodiment, the side of the adjustment plate 31 facing away from the adjustment adapter plate 12 is fixedly connected to a bearing seat 32; a bearing 33 is installed inside the bearing seat 32.

[0084] Along the height direction, both ends of the rocker arm frame assembly 4 are rotatably connected to corresponding bearings 33. The bearings 33 reduce the frictional resistance of the rocker arm frame assembly 4 rotating on the adjustment plate 31. For example, along the height direction, both ends of the first rocker arm frame assembly are rotatably connected to corresponding bearings 33, and both ends of the second rocker arm frame assembly are rotatably connected to corresponding bearings 33.

[0085] A plumb bob 34 is fixedly connected to a bearing housing 32 located at the bottom of the adapter frame assembly 1; the plumb bob 34 extends axially along the bearing housing 32. The axial extension of the plumb bob 34 along the bearing housing 32 facilitates adjustment of the coaxiality of the bearing housing 32 and the hinge rotation axis of the antenna. For example, a screw is screwed inside the bearing housing 32, fixing one end of the plumb bob 34 to the screw, while the other end extends axially along the bearing housing 32.

[0086] See Figure 7 and Figure 8 As shown, optionally, the adjusting plate 31 is provided with a keyway hole 313, and a key that mates with the bearing housing 32 is installed on the keyway hole 313; the bearing housing 32 can be positioned through the keyway hole 313 and the key.

[0087] See Figure 7 and Figure 8 As shown, optionally, the adjusting plate 31 is provided with a plurality of bearing housing mounting holes 312, and screws pass through the bearing housing 32 and are screwed into the bearing housing mounting holes 312; the bearing housing 32 is fixed to the adjusting plate 31 by means of the bearing housing mounting holes 312 and the screws. The bearing housing mounting holes 312 are, for example, threaded holes.

[0088] See Figure 3 , Figure 4 , Figures 9-11 and Figure 15 As shown, in the optional scheme of this embodiment, both the first rocker arm frame assembly and the second rocker arm frame assembly include a rocker arm frame 44, an auxiliary arm 41, and a rotating shaft 43.

[0089] When the adapter frame assembly 1, the first rocker arm frame assembly, and the second rocker arm frame assembly are stacked in sequence, the auxiliary arm 41 is fixedly connected to the side of the rocker arm frame 44 near the adapter frame assembly 1.

[0090] Along the height direction, both ends of the auxiliary arm 41 are connected to a rotating shaft 43, and a set screw 42 is screwed onto the side wall of the auxiliary arm 41 to abut against the rotating shaft 43; the set screw 42 is used to fix the rotating shaft 43 to the auxiliary arm 41; the depth of the rotating shaft 43 inserted into the auxiliary arm 41 can also be adjusted by loosening the set screw 42. Optionally, the auxiliary arm 41 is provided with a rotating shaft interface 411 for inserting the rotating shaft 43.

[0091] The rotating shaft 43 is inserted into the bearing housing 32, and a bearing 33 is connected between the rotating shaft 43 and the bearing housing 32. Through the rotating shaft 43 and the bearing housing 32, the first rocker arm frame assembly and the second rocker arm frame assembly are rotatably connected to the adjustment table assembly 3, respectively.

[0092] Optionally, the rocker arm frame 44 is made of square tubing welded together; for example, it is made of aluminum square tubing with a specification of 40mm×40mm×4mm welded together.

[0093] See Figure 3 , Figure 4 , Figure 9 and Figure 15 As shown, in the optional embodiment, the distance between the pivot 43 of the first rocker arm frame assembly and the adapter frame assembly 1 is smaller than the distance between the pivot 43 of the second rocker arm frame assembly and the adapter frame assembly 1. This design facilitates the sequential stacking of the adapter frame assembly 1, the first rocker arm frame assembly, and the second rocker arm frame assembly, thus enabling the two deployed subarrays of the antenna to be retracted.

[0094] See Figures 3-5 As shown, in an optional embodiment, the adapter frame assembly 1 includes an adapter frame axis extending along the height direction, and the adapter frame axis is the axis of symmetry of the adapter frame assembly 1.

[0095] The mounting and fixing structure includes multiple mounting plates 11; the overall distribution of the multiple mounting plates 11 is symmetrical about the axis of the transition frame. For example... Figure 5 As shown, there are 6 mounting plates 11.

[0096] Optionally, the adjustment platform assemblies 3 on both sides of the adapter frame assembly 1 are symmetrically distributed about the adapter frame axis.

[0097] Optionally, the number of rotating lifting rings 2 is at least two, and the overall distribution of all rotating lifting rings 2 is symmetrical about the axis of the transition frame; the symmetrical distribution of all rotating lifting rings 2 about the axis of the transition frame facilitates the lifting of the deployment test fixture, and also facilitates the installation of the deployment test fixture on the zero-gravity truss or other fixtures. Figure 2 As shown, there are two rotating rings 2.

[0098] Optionally, all the suspending components 5 are distributed symmetrically about the adapter frame to compensate for the gravity of the two deployed subarrays of the antenna as much as possible, simulate the weightlessness of the antenna in orbit, and achieve a greater degree of unloading of the antenna's own gravity so that the antenna gravity can be compensated during ground deployment tests, thereby simulating the antenna deployment process in orbit as much as possible.

[0099] See Figure 12 As shown, in the optional embodiment, the hanging assembly 5 includes a guide rail 51, a tension sensor 53, a hook 54, and a trolley seat 55.

[0100] The guide rail 51 is fixedly connected to the bottom of the first rocker arm frame assembly or the bottom of the second rocker arm frame assembly; the trolley seat 55 is slidably connected to the guide rail 51, and a tension sensor 53 is connected between the trolley seat 55 and the hook 54. The suspension force value can be displayed in real time through the tension sensor 53. Optionally, the rocker arm frame 44 is provided with a guide rail mounting interface 441; the guide rail connector 56 is inserted into the guide rail mounting interface 441 and fixedly connected to the guide rail 51, so that the guide rail 51 is fixedly connected to the bottom of the first rocker arm frame assembly or the bottom of the second rocker arm frame assembly through the guide rail connector 56; for example, each guide rail 51 is fixedly connected to the bottom of the first rocker arm frame assembly or the bottom of the second rocker arm frame assembly through two or more guide rail connectors 56.

[0101] The axis of the hook 54 is perpendicular to the axis of the guide rail 51.

[0102] See Figure 10 As shown, optionally, along the second direction, the distance d between the guide rail mounting interface 441 and the rotating shaft interface 411 is consistent with the distance between the antenna hinge rotation axis of the antenna subarray to be suspended and the suspension point position of the antenna subarray.

[0103] In an optional embodiment, the hanging assembly 5 further includes a turnbuckle 52; the turnbuckle 52 is connected between the trolley seat 55 and the tension sensor 53, and the turnbuckle 52 is configured to adjust the distance between the trolley seat 55 and the tension sensor 53; the distance between the tension sensor 53 and the trolley seat 55 can be adjusted by the turnbuckle 52, that is, the distance between the hook 54 and the trolley seat 55 can be adjusted; the value of the tension sensor 53 can also be changed by adjusting the length of the turnbuckle 52.

[0104] Optionally, a bearing is connected between the trolley seat 55 and the guide rail 51. The bearing connecting the trolley seat 55 and the guide rail 51 reduces the sliding resistance of the trolley seat 55 on the guide rail 51, allowing the trolley seat 55 to slide with slight damping.

[0105] In an optional embodiment, the adapter frame assembly 1 is welded from square tubing; for example, the adapter frame assembly 1 is welded from aluminum square tubing with specifications of 60mm×60mm×5mm. Optionally, the thickness of the mounting plate 11 is 2 to 4 times the thickness of the square tubing of the adapter frame assembly 1, for example, the thickness of the mounting plate 11 is 3 times the thickness of the square tubing of the adapter frame assembly 1. Optionally, the mounting plates 11 are welded onto the adapter frame assembly 1 by machining to ensure the flatness and positional accuracy of the welding interface; optionally, the number of mounting plates 11 is 6; optionally, each mounting plate 11 is provided with one or more through holes for mating with zero-gravity trusses or other tooling.

[0106] To better understand the deployment test fixture for the folding SAR antenna described in this embodiment, the debugging process of the deployment test fixture is briefly described below:

[0107] like Figure 15 As shown, the deployment test fixture is first assembled on the ground, ensuring that the distance between the two rotating shafts 43 of the first and second rocker arm frame assemblies satisfies a first distance d1 and a second distance d2. The first distance d1 is the distance between the two rotating shafts 43 of the first and second rocker arm frame assemblies along a first direction, and the second distance d2 is the distance between the two rotating shafts 43 of the first and second rocker arm frame assemblies along a second direction. The distance between the hinge rotation axes of the two deployment subarrays of the antenna along the first direction is d1, and the distance along the second direction is d2.

[0108] like Figure 16 As shown, the two rotating lifting rings 2 of the unfolding test fixture are then lifted by a crane and connected to the zero-gravity truss. The fixture is then installed using screws through the six through holes of the mounting plate 11 on the adapter frame assembly 1. After installation, the unfolding test fixture is finely adjusted on the zero-gravity truss by adjusting the adjustment platform assembly 3, so that the rocker arm frames 44 of the first and second rocker arm frames can be suspended at any position between 0° and 180° for an extended period, and the trolley seat 55 can be suspended at any position on the guide rail 51 for an extended period.

[0109] like Figure 17 and Figure 18 As shown, after installing the deployment test fixture, the satellite carrying the SAR antenna is moved under the fixture. The attitude and position of the satellite's SAR antenna are adjusted, with the elevation angle of the onboard SAR antenna array relative to the horizontal plane at 90°±0.02° and the roll angle at 0°±0.02°. The coaxiality of the antenna's two hinge axes with the rotation axis 43 of the first and second rocker arm frame assemblies of the deployment test fixture is ≤φ4mm. After meeting these specifications, the surface is adjusted to a relatively ideal state. Subsequent antenna deployment tests can then be conducted.

[0110] This embodiment also provides a deployment test system, including the deployment test fixture for the folding SAR antenna described in any of the above embodiments.

[0111] The deployment test system provided in this embodiment includes the aforementioned deployment test fixture for a foldable SAR antenna. The technical features of the disclosed deployment test fixture for foldable SAR antennas are also applicable to this deployment test system, and will not be repeated here. The deployment test system in this embodiment possesses the advantages of the aforementioned deployment test fixture for foldable SAR antennas, and these advantages will not be repeated here.

[0112] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A deployment test fixture suitable for a folding SAR antenna, characterized in that, It includes a transition frame assembly (1), a rotating lifting ring (2), an adjustment platform assembly (3), a rocker arm frame assembly (4), and a hanging assembly (5); the unfolding test fixture has a first direction, a second direction, and a height direction that are perpendicular to each other; Along the second direction, the adapter frame assembly (1) includes a corresponding first surface and a second surface; the first surface of the adapter frame assembly (1) is provided with an installation and fixing structure; the rotating lifting ring (2) and the adjusting platform assembly (3) are both connected to the second surface of the adapter frame assembly (1), and the rotating lifting ring (2) is connected to the top of the adapter frame assembly (1); The rocker arm frame assembly (4) includes a first rocker arm frame assembly and a second rocker arm frame assembly; along the first direction, the first rocker arm frame assembly is connected to one side of the adapter frame assembly (1) via the adjustment platform assembly (3), and the second rocker arm frame assembly is connected to the other side of the adapter frame assembly (1) via the adjustment platform assembly (3); the adjustment platform assembly (3) is configured to be adjustable to change the position of the first rocker arm frame assembly and the second rocker arm frame assembly relative to the adapter frame assembly (1); The first rocker arm frame assembly and the second rocker arm frame assembly are rotatably connected to the corresponding adjustment platform assembly (3) so that the adapter frame assembly (1), the first rocker arm frame assembly and the second rocker arm frame assembly are stacked in sequence; The bottom of the first rocker arm frame assembly and the bottom of the second rocker arm frame assembly are respectively connected to a plurality of the hanging assemblies (5); The adapter frame assembly (1) includes an adapter frame axis extending along the height direction, the adapter frame axis being the axis of symmetry of the adapter frame assembly (1); The second side of the adapter frame assembly (1) is fixedly connected to an adjustment adapter plate (12); at least the four corners of the adapter frame assembly (1) are provided with adjustment adapter plates (12); the overall distribution of all the adjustment adapter plates (12) is symmetrical about the axis of the adapter frame. Each of the adjustment adapter plates (12) has a pair of adjustment blocks (13) fixedly connected to the side facing away from the adapter frame assembly (1); each adjustment block (13) is screwed with an adjustment pin (14); the axis of the adjustment pin (14) is parallel to the first direction; The adjustment platform assembly (3) includes an adjustment body and an adjustment plate (31); the adjustment plate (31) is fixedly connected to both ends of the adjustment body along the height direction. The adjustment plate (31) is connected to the adjustment adapter plate (12), and the adjustment plate (31) is located between the pair of adjustment blocks (13), and the adjustment pin (14) abuts against the side of the adjustment plate (31).

2. The deployment test fixture for a folding SAR antenna according to claim 1, characterized in that, The adjustment plate (31) is provided with a first adjustment plate hole (311); the first adjustment plate hole (311) is elongated; the fastener passes through the first adjustment plate hole (311) and is screwed to the adjustment adapter plate (12); the length direction of the first adjustment plate hole (311) is parallel to the first direction.

3. The deployment test fixture for a folding SAR antenna according to claim 1, characterized in that, A bearing seat (32) is fixedly connected to the side of the adjusting plate (31) away from the adjusting adapter plate (12); a bearing (33) is installed inside the bearing seat (32). Along the height direction, both ends of the rocker arm frame assembly (4) are rotatably connected to the corresponding bearings (33); A plumb bob (34) is fixedly connected to the bearing seat (32) located at the bottom of the adapter frame assembly (1); the plumb bob (34) extends along the axial direction of the bearing seat (32).

4. The deployment test fixture for a folding SAR antenna according to claim 3, characterized in that, Both the first rocker arm frame assembly and the second rocker arm frame assembly include a rocker arm frame (44), an auxiliary arm (41), and a pivot (43). When the adapter frame assembly (1), the first rocker arm frame assembly and the second rocker arm frame assembly are stacked in sequence, the auxiliary arm (41) is fixedly connected to the side of the rocker arm frame (44) close to the adapter frame assembly (1); Along the height direction, both ends of the auxiliary arm (41) are connected to a rotating shaft (43), and the side wall of the auxiliary arm (41) is screwed with a set screw (42) that abuts against the rotating shaft (43). The rotating shaft (43) is inserted into the bearing housing (32), and the bearing (33) is connected between the rotating shaft (43) and the bearing housing (32).

5. The deployment test fixture for a folding SAR antenna according to claim 4, characterized in that, The distance between the pivot (43) of the first rocker arm frame assembly and the adapter frame assembly (1) is less than the distance between the pivot (43) of the second rocker arm frame assembly and the adapter frame assembly (1).

6. The deployment test fixture for a folding SAR antenna according to claim 1, characterized in that, The mounting and fixing structure includes multiple mounting plates (11); the multiple mounting plates (11) are symmetrically distributed about the axis of the adapter frame. The adjustment platform assemblies (3) on both sides of the adapter frame assembly (1) are symmetrically distributed about the adapter frame axis; The number of the rotating lifting rings (2) is at least two, and the overall distribution of all the rotating lifting rings (2) is symmetrical about the axis of the transition frame; The overall distribution of all the hanging components (5) is symmetrical about the axis of the transition frame.

7. The deployment test fixture for a folding SAR antenna according to claim 1, characterized in that, The suspension assembly (5) includes a guide rail (51), a tension sensor (53), a hook (54), and a trolley seat (55); The guide rail (51) is fixedly connected to the bottom of the first rocker arm frame assembly or the bottom of the second rocker arm frame assembly; the trolley seat (55) is slidably connected to the guide rail (51), and the tension sensor (53) is connected between the trolley seat (55) and the hook (54). The axial direction of the hook (54) is perpendicular to the axial direction of the guide rail (51).

8. The deployment test fixture for a folding SAR antenna according to claim 7, characterized in that, The hanging assembly (5) also includes a turnbuckle (52); the turnbuckle (52) is connected between the trolley seat (55) and the tension sensor (53), and the turnbuckle (52) is configured to adjust the distance between the trolley seat (55) and the tension sensor (53); A bearing is connected between the trolley seat (55) and the guide rail (51).

9. A deployment test system, characterized in that, Includes the deployment test fixture for a folding SAR antenna as described in any one of claims 1-8.

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