Sliding type unfolding and unloading system for offset-fed framework reflector

Abstract

The invention discloses a sliding type unfolding and unloading system for an offset-fed framework reflector. The sliding type unfolding and unloading system comprises a first offset angle adjusting device, a distributed self-tracking sliding device, a self-balancing height compensation device and a second offset angle adjusting device, the first offset angle adjusting device is located at the topmost end of the whole system and used for providing a fixed connecting point of the system and adjusting the deflection angle of the whole system. The upper surface of the distributed self-tracking sliding device is connected with the first offset angle adjusting device, and the lower surface of the distributed self-tracking sliding device is provided with a plurality of groups of guide rail sliding units for realizing self-tracking of the unfolding track of the offset-fed framework reflector; the self-balancing height compensation device comprises a plurality of groups of compensation units, one end of each group of compensation unit is connected with one guide rail sliding unit, and the other end of each group of compensation unit is connected with one unloading point on the offset-feed type framework reflector and is used for performing torque compensation on each unloading point of the offset-feed type framework reflector; according to the invention, mutual interference among unloading components in the folding and unfolding process of the reflector is effectively avoided, and orderly and stable unloading of the reflector is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to a sliding type deployment unloading system of a feed frame reflector, which can be used for ground unloading of a simulated antenna in an on-orbit zero-gravity state and belongs to the technical field of ground zero-gravity unloading of a large on-orbit deployable antenna. BACKGROUND

[0002] During on-orbit deployment of an on-orbit antenna, a space zero-gravity environment is experienced, and the ground gravity environment will greatly affect the dynamic characteristics among mechanisms and modules during deployment, so that the on-orbit deployment characteristics and the antenna deployment state cannot be truly predicted. Therefore, the ground unloading system must simulate the space zero-gravity environment to minimize the influence of the ground gravity on the antenna deployment.

[0003] The feed frame reflector has a short deployment time and a high speed, and a corresponding unloading device needs to be developed according to the structure, the deployment mode and the motion track of the feed frame reflector. The unloading device is required to quickly match the deployment track, and the unloading system does not affect the motion function of the antenna deployment process. The existing unloading system of the feed frame reflector has the following disadvantages: the single-pendulum type hanging unloading is adopted during deployment of the current feed frame reflector, displacement compensation during deployment is achieved through elastic elements, the unloading force cannot be kept constant during deployment, and simultaneously, in order to reduce the influence of the unloading system on the reflector deployment, the installation space of the unloading system needs to be increased with the increase of the mechanical aperture of the reflector. When the aperture of the reflector is increased to a certain extent, the unloading system cannot meet the requirements of the ground deployment test. SUMMARY

[0004] The technical problem of the application is to overcome the disadvantages of the prior art and provide a sliding type deployment unloading system of a feed frame reflector, which can quickly match the deployment track and does not affect the motion function of the antenna deployment process.

[0005] The technical solution of the application is a sliding type deployment unloading system of a feed frame reflector, which comprises:

[0006] a first bias angle adjusting device, a distributed self-tracking sliding device, a self-balancing height compensation device and a second bias angle adjusting device, wherein:

[0007] The first bias angle adjusting device is located at the top end of the whole system and is used for providing a fixed connection point of the system and adjusting the deflection angle of the whole system;

[0008] The upper surface of the distributed self-tracking sliding device is connected with the first bias angle adjusting device, and the lower surface is provided with a plurality of groups of guide rail sliding units and is used for realizing self-tracking of the deployment track of the feed frame reflector;

[0009] The self-balancing height compensation device comprises a plurality of compensation units, the number of which is equal to the number of the guide rail sliding units, one end of each compensation unit is connected to one guide rail sliding unit, and the other end is connected to one unloading point on the offset-fed frame reflector, for torque compensation of each unloading point of the offset-fed frame reflector.

[0010] The second offset angle adjustment device is located at the bottom end of the system, the upper end of which is in contact with the edge of the offset-fed frame reflector, and the second offset angle adjustment device can be moved and fixed, for keeping the specific position and posture of the offset-fed frame reflector in cooperation with the first offset angle adjustment device.

[0011] Preferably, the first offset angle adjustment device comprises a top plate, a length adjustment unit, and a bottom plate, the number of the length adjustment unit being greater than or equal to 4; one end of each length adjustment unit is connected to the top plate, and the other end is connected to the bottom plate, for adjusting the angle between the top plate and the bottom plate.

[0012] Preferably, each length adjustment unit comprises a forward screw, a bidirectional internally-threaded sleeve rod, a reverse screw, an upper connecting hinge, and a lower connecting hinge, for adjusting the overall length, in particular:

[0013] One end of the bidirectional internally-threaded sleeve rod is connected to the forward screw, and the other end is connected to the reverse screw; the other end of the forward screw is connected to the upper connecting hinge, and the other end of the reverse screw is connected to the lower connecting hinge; the upper connecting hinge and the lower connecting hinge are connected to the top plate and the bottom plate, respectively.

[0014] The deflection angle of the entire unloading system is adjusted by rotating the bidirectional internally-threaded sleeve rod through the forward screw and the reverse screw.

[0015] Preferably, the distributed self-tracking sliding device comprises a top plate and Q sets of guide rail sliding units installed on the lower surface of the top plate, Q≥2.

[0016] Each set of guide rail sliding units comprises a linear guide rail, a C-shaped trolley, and a connecting hinge; each linear guide rail is provided with a connecting hinge at each end, which is connected to the lower surface of the top plate through the connecting hinge; the C-shaped trolley is installed on the linear guide rail and moves along the linear guide rail when the offset-fed frame reflector is unfolded.

[0017] Preferably, the guide rail sliding units are installed in a symmetrical radial staggered manner on the lower surface of the top plate, and the installation direction is the same as the unfolding motion trajectory of the frame reflector, in particular:

[0018] The linear guide rails of the distributed self-tracking sliding device are installed along the hanging point direction of the offset-fed frame reflector in the folded state to the hanging point direction in the unfolded state, wherein the unloading point in the folded state is represented as P i-s , i=1, 2, 3,..., Q, and the unloading point in the unfolded state is represented as Pi-d , i = 1, 2, 3...Q, the unfolding path of each unloading point is represented as a straight line L i-r , the median plane of the unfolding path is represented as S i-m , each guide rail is represented as P i , i = 1, 2, 3...Q

[0019] The specific determination of the unloading guide rail is that the top installation plane of the unloading system is S0, the height is H1, the guide rail installation plane is S1, the height is H2, and they satisfy the relationship H1 < H2, the gravity center of the reflector in the unfolded state is P w , the projection point of the gravity center on the top installation plane S0 is P0, the median plane S i-m of the unfolding path of each unloading point intersects the top installation plane S0 of the system to form an intersection line L i-m , a plane passing through the projection point P0 of the gravity center is found as the normal line of the intersection line L i-m , which is represented as S i-v , the intersection of the plane S i-v and the intersection line L i-m forms a point, which is represented as P i-cr , a straight line is drawn through P i-cr and P i-s , and the intersection of the straight line and the guide rail installation plane S1 forms an intersection point P i-rs , a straight line is drawn through P i-cr and P i-d , and the intersection of the straight line and the guide rail installation plane S1 forms an intersection point P i-rd , the connecting line L i-rs of the above two intersection points P i-rd and P i-r is the installation direction of the guide rail P i , P i-rs is the retracted position of the unloading point i, P i-rd is the unfolded position of the unloading point i, the height is adjusted by the included angle θ i-rs between the straight line connecting P i-rd and P i-r , the connecting line L i-rs between the guide rail unloading point P i-s and the reflector unloading point P i-s in the retracted state, and the connecting line L i-rd between the guide rail unloading point P i-d and the reflector unloading point P i-d in the unfolded state, satisfy the length relationship L i-s = L i-d , and at the same time, the included angle θ i-s between L i-s in the retracted state and the connecting line between the retracted unloading point P i-d and the unfolded unloading point Pi-s L i-d same as the reflection on the point P i-d

[0020] with the unfolding of the unloading point P i-d angle θ i-d θ i-s = θ i-d < 90 °.

[0021] Preferably, each set of compensation units in the self-balancing height compensation device comprises a constant force elongation structure and an upper sling and a lower sling; wherein:

[0022] The upper end of the upper sling is fixedly connected with the C-shaped trolley of the guide rail sliding unit, the upper end of the constant force elongation structure is connected with the upper sling, the lower end of the constant force elongation structure is connected with the upper end of the lower sling, and the lower end of the lower sling is fixedly connected with the unloading point on the bias feed framework reflector;

[0023] The constant force elongation structure realizes compensation of the lengths of the unloading hanging ropes of the framework reflector, and comprises an integrated plate, a forward hub, a constant force spring, a reverse hub and a transmission gear set; the two ends of the constant force spring are wound on the forward hub and the reverse hub respectively, after the two ends of the constant force spring are mounted on the forward hub and the reverse hub, the constant force spring generates a constant driving torque by itself, and drives the forward hub and the reverse hub to rotate respectively; wherein the reverse hub is always in gear engagement with the gear set, and the rotation of the reverse hub drives the transmission gear set to release or tighten the lower sling wound on the transmission gear set, so that the length of the unloading rope of the framework reflector is adjusted.

[0024] Preferably, the second bias angle adjusting device comprises a main support base, a reversible plate, a rotating hinge and an auxiliary support rod, wherein:

[0025] One end of the reversible plate is connected to one end of the main support base through the rotating hinge, one end of the auxiliary support rod is connected to the middle position of the reversible plate, and the other end can slide and be fixed on the upper surface of the support base, for adjusting the turning angle of the reversible plate and maintaining the state of the reversible plate;

[0026] The bottom end of the main support base is provided with a pulley and a fixing structure thereof, for realizing overall movement and fixation of the second bias angle adjusting device, so that the position and posture of the framework reflector are maintained together with the first bias angle adjusting device.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] (1) The present application first adopts a self-compensation sliding type unfolding to realize constant force equal length unloading of gravity in the ground unfolding process of the bias feed type framework reflector, which can effectively avoid mutual interference between the unloading components in the process of folding and unfolding of the reflector, and realize orderly and stable unloading of the reflector;

[0029] (2) The structure of the application is simple and easy to realize, has good versatility, simple installation and debugging, and strong adaptability to unloading sites;

[0030] (3) The system has the advantages of high rigidity, light weight, strong operability, convenient adjustment, and adaptability to various bias-fed type frame reflectors. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a deployment state unloading schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0032] Figure 2 It is a first bias angle adjustment device structure schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0033] Figure 3 It is a distributed self-tracking sliding device structure schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0034] Figure 4 It is a each group of guide rail sliding unit structure schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0035] Figure 5 It is a guide rail direction determination method schematic diagram of the distributed self-tracking sliding device of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0036] Figure 6 It is a self-balancing height compensation device structure schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application.

[0037] Figure 7 It is a second bias angle adjustment device structure schematic diagram of the sliding type deployment and unloading system of the bias-fed frame reflector of the application. DETAILED DESCRIPTION

[0038] A sliding type deployment and unloading system of a bias-fed frame reflector, the bias-fed frame reflector is a variant of a parabolic antenna, the feed source deviates from the symmetry axis of the reflecting surface, and is usually located on the side of the parent parabolic surface. The sliding type deployment and unloading system comprises: a first bias angle adjustment device 1, a distributed self-tracking sliding device 2, a self-balancing height compensation device 3, and a second bias angle adjustment device 4.

[0039] The first bias angle adjustment device 1 is located at the top of the entire unloading system, and adjusts the deflection angle of the entire unloading system through forward and reverse screws, and provides a fixed connection point for the unloading system when the antenna (bias feed frame reflector 5) is deployed; the first bias angle adjustment device 1 includes at least 4 groups of length adjustment units 102, which adjust the angle between the top plate 101 and the bottom plate 103 by adjusting the axial length between each other; each group of length adjustment devices 102 includes a forward screw 1021, a bidirectional internal threaded sleeve 1022, a reverse screw 1023, an upper connecting hinge 1024, and a lower connecting hinge 1025; one end of the bidirectional internal threaded sleeve 1022 is connected to the forward screw 1021, and the other end is connected to the reverse screw 1023; the other end of the forward screw 1021 is connected to the upper connecting hinge 1024, and the other end of the reverse screw 1023 is connected to the lower connecting hinge 1025; the upper connecting hinge 1024 and the lower connecting hinge 1025 are respectively connected to the top plate 101 and the bottom plate 103. The deflection angle of the entire unloading system is adjusted by using the forward screw 1021 and the reverse screw 1023 and by rotating the bidirectional internal threaded sleeve 1022 .

[0040] The distributed self-tracking sliding device 2 is located below the first bias angle adjustment device 1, and is connected to the first bias angle adjustment device by screws. It is connected to multiple unloading points through multiple guide rail sliding units, and the self-tracking of the deployment trajectory of the frame reflector is achieved by sliding the pulley on the sliding device; the distributed self-tracking sliding module 2 includes Q groups of guide rail sliding units 202, Q ≥ 2, and the guide rail sliding units are set in the same direction as the deployment motion trajectory of the frame reflector, and are installed symmetrically and radially on the lower surface of the top plate 201 with height offset. Each group of guide rail sliding units 202 is composed of a linear guide rail 2021, a C-shaped pulley 2022, and a connecting hinge 2023; each linear guide rail 2021 is provided with a connecting hinge 2023 at both ends, and is connected to the lower surface of the top plate 201 through the connecting hinge 2023. The movement direction of the guide rail sliding units in the distributed self-tracking sliding system 2 is the same as the deployment motion trajectory of the bias-fed frame reflector 5, and they are installed symmetrically and radially in space with height offset to avoid interference with the unloading point trajectory during the deployment of the frame reflector;

[0041] The self-balancing height compensation device 3 is located between the distributed self-tracking sliding device 2 and the offset feed type framework reflector 5, and comprises a plurality of sets of compensation units equal in number to the number of guide rail sliding units, each set of compensation units being composed of a constant force elongation structure 301 and corresponding unloading hanging ropes (upper hanging ropes 302 and lower hanging ropes 303), the upper ends of the upper hanging ropes 302 being fixedly connected with the C-shaped trolleys 2022 of the guide rail sliding units 202, and the lower ends of the lower hanging ropes 303 being fixedly connected with unloading points of the offset feed type framework reflector 5; the compensation of the lengths of the unloading hanging ropes of the framework reflector is realized through the constant force elongation structure 301; and the constant force elongation structure 301 internally provides a constant driving torque through a constant force mainspring, and converts the rotary motion into the telescopic motion in the length direction of the hanging ropes through an internal transmission gear assembly.

[0042] The second bias angle adjusting device 4 is located at the bottom end of the entire unloading system, and is used for matching the unloading posture before the framework reflector is unfolded, and the upper end thereof is in contact with the edge of the offset feed type framework reflector 5 and can be moved and fixed, so as to realize the holding of the specific position and posture of the framework reflector. The second bias angle adjusting device 4 is composed of a main support base 401, a reversible plate 402, a rotating hinge 403 and an auxiliary support rod 404, and is a crank slider mechanism. One end of the reversible plate 402 is connected to one end of the main support base 401 through the rotating hinge 403, and the state thereof is maintained through the auxiliary support rod 404. The main support base 401 and the reversible plate 402 mainly constitute the second bias angle adjusting device 4, one end of the auxiliary support rod 404 is connected to the middle position of the reversible plate 402, and the other end thereof can slide and be fixed on the upper surface of the support base 401, and is used for adjusting the turning angle of the reversible plate 402 and maintaining the state of the reversible plate 402. The bottom end of the main support base 401 is provided with a pulley and a fixing structure thereof, and is used for realizing the overall movement and fixation of the second bias angle adjusting device 4, so as to realize the holding of the position and posture of the framework reflector together with the first bias angle adjusting device 1.

[0043] According to the movement trajectory of the offset feed type framework reflector, the movement trajectories of the unloading points are obtained, and corresponding unloading following devices are installed above the unloading points corresponding to the unloading points according to the movement trajectories of the unloading points.

[0044] In order to make the purpose, technical scheme and advantages of the present application more clear, the unloading device of the present application will be further described in detail below with reference to the drawings.

[0045] As shown in Figure 1 FIG. 1, a sliding type unfolding and unloading system and method for an offset feed type framework reflector is characterized by comprising a first bias angle adjusting device 1, a distributed self-tracking sliding device 2, a self-balancing height compensation device 3 and a second bias angle adjusting device 4.

[0046] As shown in Figures 2-3As shown, the first bias angle adjustment device 1 is located at the top of the entire unloading system, composed of a top plate 101, a length adjustment unit 102, and a bottom plate 103. The top plate 101 is connected to the external support truss of the entire unloading system, and the length adjustment unit 102 is connected to the top plate 101 and the bottom plate 103 through mounting holes at both ends. The first bias angle adjustment device 1 includes at least four groups of length adjustment units 102, which adjust the overall length through forward screws 1021, bidirectional internal threaded sleeve rods 1022, reverse screws 1023, upper connecting hinges 1024, and lower connecting hinges 1025, and realize the adjustment of the angle between the top plate 101 and the bottom plate 103. Further, one end of the bidirectional internal threaded sleeve rod 1022 is connected to the forward screw 1021, and the other end is connected to the reverse screw 1023. The other end of the forward screw 1021 is connected to the upper connecting hinge 1024, and the other end of the reverse screw 1023 is connected to the lower connecting hinge 1025. The upper connecting hinge 1024 and the lower connecting hinge 1025 are connected to the top plate 101 and the bottom plate 103, respectively.

[0047] As shown in Figure 4 , the distributed self-tracking sliding device 2 is located below the first bias angle adjustment device 1, and the main structure is a top plate 201 composed of one or more plates. The bottom surface of the top plate 201 is provided with guide rail mounting holes for installing Q groups of guide rail sliding units 202, Q≥2. The guide rail sliding units are installed in a symmetrical radial manner on the lower surface of the top plate 201, with the same direction as the unfolding motion trajectory of the truss reflector. Each group of guide rail sliding units 202 includes a linear guide rail 2021, a C-shaped trolley 2022, and a connecting hinge 2023. Each linear guide rail 2021 is provided with a connecting hinge 2023 at both ends, which is connected to the lower surface of the top plate 201 through the connecting hinge 2023.

[0048] As shown in Figure 5 , the linear guide rail of the distributed self-tracking sliding device 2 is installed along the hanging point direction from the folding state to the unfolded state of the bias-fed truss reflector. In the folding state, the unloading point is represented as P i-s (i=1,2,3.....Q), and in the unfolded state, the unloading point is represented as P i-d (i=1,2,3.....Q). The unfolding path of each unloading point is represented as a straight line L i-r , and the median plane of the unfolding path is represented as S i-m . Each guide rail is represented as P i (i=1,2,3.....Q). The specific determination method of the unloading guide rail is as follows: the top installation plane of the unloading system is S0, the height is H1, the guide rail installation plane is S1, the height is H2, and they satisfy the relationship H1<H2. The gravity center of the reflector in the unfolded state is P wThe projection point of the center of gravity on the top installation plane S0 is P0, and the median perpendicular plane S of the unfolding path of each unloading point is i-m Intersecting with the system top installation plane S0 forms an intersection line L i-m , with the intersection line L i-m As the normal, find the plane through the centroid projection point P0, expressed as S i-v , the plane intersects the line L i-m The intersection of will form a point, denoted as P i-cr ; Draw a straight line through P i-cr and P i-s , the straight line will intersect with the guide rail installation plane S1, forming an intersection point P i-rs ; Continue to draw a straight line through P i-cr and P i-d , the straight line will intersect with the guide rail installation plane S1, forming an intersection point P i-rd , then the above two intersection points P i-rs and P i-rd The line L i-r That is the guide rail P i Installation direction, P i-rs is the stowed position of unloading point i, P i-rd The unfolded position of the unloading point i is adjusted by the height adjustment guide rail and the connection P i-rs 、P i-rd The straight line angle θ i-r , satisfying the relationship L i-s =L i-r ,θ i-s =θ i-d <90°.

[0049] like Figure 6 As shown, the self-balancing height compensation system 3 is located between the distributed self-tracking sliding system 2 and the offset-feed frame reflector 5. The self-balancing height compensation device 3 includes multiple groups of compensation units, the number of which is equal to the number of guide rail sliding units. Each group of compensation units consists of a constant force extension device 301, an upper sling 302, and a lower sling 303.

[0050] The constant force elongation structure 301 includes: an integrated board 3011, a forward hub 3012, a constant force spring 3013, a reverse hub 3014, and a transmission gear set 3015, wherein the two ends of the constant force spring 3013 are respectively wound around the forward hub 3012 and the reverse hub 3014. After the reverse hub 3014 is driven by the constant force spring 3013, the gear on the reverse hub 3014 drives the transmission gear set 3015 to release or tighten the lower sling 303 wrapped around it, thereby adjusting the length of the unloading rope of the frame reflector.

[0051] like Figure 7As shown, the second bias angle adjusting device 4 is located at the bottom end of the whole unloading system, which is composed of a main support base 401 and a reversible plate 402, and is rotatably connected through a pin shaft.

[0052] According to the content of the present application, a bias-fed framework reflector sliding type unfolding unloading system and method, in the embodiment, a bias-fed framework reflector sliding type unfolding unloading system and method implementation process as follows:

[0053] According to the bias-fed framework reflector structure and mass distribution, 18 unloading points are arranged, and are vertically connected with the unloading system through unloading ropes. During the unfolding process of the reflector, the 18 unloading ropes are unfolded along the linear guide rail in a radial manner through the C-shaped trolley. During the unfolding process, the unloading devices at each unloading point work in cooperation until the antenna is completely unfolded in place.

[0054] The present application first adopts a self-compensation sliding type unfolding unloading device to realize the unloading of the gravity of the bias-fed framework reflector during the ground unfolding process, which can effectively avoid the mutual interference between the unloading components during the folding and unfolding process of the reflector, and ensure the orderly and stable unloading of the reflector. The unloading system has good universality, simple installation and debugging, low unloading height requirement, and strong adaptability.

[0055] The above is only the best specific unloading mode of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0056] The contents not described in detail in the specification of the present application belong to the prior art known by the person skilled in the art.

Claims

1. A sliding deployment and unloading system for a bias-feed reflector, characterized in that include: A first offset angle adjustment device (1), a distributed self-tracking sliding device (2), a self-balancing height compensation device (3), and a second offset angle adjustment device (4); wherein: The first deflection angle adjustment device (1) is located at the top of the entire system and is used to provide a fixed connection point for the system and adjust the deflection angle of the entire system; The upper surface of the distributed self-tracking sliding device (2) is connected to the first offset angle adjustment device (1), and the lower surface is provided with multiple groups of guide rail sliding units for realizing self-tracking of the deployment trajectory of the offset-feed frame reflector; The self-balancing height compensation device (3) comprises a plurality of compensation units, the number of which is equal to the number of the guide rail sliding units, one end of each compensation unit being connected to a guide rail sliding unit, and the other end being connected to an unloading point on the offset-feed frame reflector, for performing torque compensation on each unloading point of the offset-feed frame reflector; The second bias angle adjustment device (4) is located at the bottom of the system, and its upper end contacts the edge of the offset-fed frame reflector. At the same time, the second bias angle adjustment device (4) can be moved and fixed, and is used to cooperate with the first bias angle adjustment device (1) to achieve the maintenance of a specific position and posture of the offset-fed frame reflector.

2. The sliding deployment and unloading system for an offset feed frame reflector according to claim 1, characterized in that: The first offset angle adjustment device (1) comprises a top plate (101), a length adjustment unit (102), and a bottom plate (103), wherein the number of the length adjustment units (102) is greater than or equal to 4; one end of each length adjustment unit (102) is connected to the top plate (101), and the other end is connected to the bottom plate (103), so as to adjust the angle between the top plate (101) and the bottom plate (103).

3. The sliding deployment and unloading system for an offset feed frame reflector according to claim 2, characterized in that: Each length adjustment unit (102) includes: a forward screw (1021), a bidirectional internal threaded sleeve (1022), a reverse screw (1023), an upper connecting hinge (1024), and a lower connecting hinge (1025) to adjust the overall length. Specifically: One end of the bidirectional internal threaded sleeve (1022) is connected to the forward screw (1021), and the other end is connected to the reverse screw (1023); the other end of the forward screw (1021) is connected to the upper connecting hinge (1024), and the other end of the reverse screw (1023) is connected to the lower connecting hinge (1025); the upper connecting hinge (1024) and the lower connecting hinge (1025) are respectively connected to the top plate (101) and the bottom plate (103); The deflection angle of the entire unloading system is adjusted by utilizing a forward screw rod (1021) and a reverse screw rod (1023) and rotating a bidirectional internal threaded sleeve rod (1022).

4. The sliding deployment and unloading system for an offset feed frame reflector according to claim 1, characterized in that: The distributed self-tracking sliding device (2) comprises: a top plate (201), and Q groups of guide rail sliding units (202) installed on the lower surface of the top plate (201), where Q is greater than or equal to 2; Each set of guide rail sliding units (202) comprises a linear guide rail (2021), a C-shaped pulley (2022), and a connecting hinge (2023); wherein: connecting hinges (2023) are respectively provided at both ends of each linear guide rail (2021), and are connected to the lower surface of the top plate (201) via the connecting hinges (2023); the C-shaped pulley (2022) is installed on the linear guide rail (2021), and when the offset feed frame reflector is unfolded, the C-shaped pulley (2022) is driven to move along the linear guide rail (2021).

5. The sliding deployment and unloading system for an offset feed frame reflector according to claim 4, characterized in that: The guide rail sliding unit is installed on the lower surface of the top plate (201) in a symmetrical radial staggered manner, and its installation direction is the same as the unfolding movement trajectory of the frame reflector. Specifically: The linear guide rail (221) of the distributed self-tracking sliding device (2) is installed along the direction from the hanging point of the offset feed frame reflector in the folded state to the hanging point after the folded state, wherein the unloading point in the folded state is represented by P i-s , i=1,2,3......Q, the unloading point in the unfolded state is represented by P i-d , i=1,2,3......Q, the expansion path of each unloading point is represented by a straight line L i-r , the median plane of the unfolded path is represented by S i-m , each guide rail is represented by P i , i=1,2,3......Q; The specific determination method of the unloading guide rail is as follows: the top installation plane of the unloading system is S0, with a height of H1, and the guide rail installation plane is S1, with a height of H2. The two satisfy the relationship H1 < H2. The center of gravity of the reflector in the unfolded state is P w , and the projection point of this center of gravity on the top installation plane S0 is P0. The mid-perpendicular plane S i-m of each unloading point's unfolding path intersects with the top installation plane S0 of the system to form an intersection line L i-m . Taking this intersection line L i-m as the normal, find the plane passing through the center of gravity projection point P0, denoted as S i-v . This plane S i-v intersects with the intersection line L i-m to form a point, denoted as P i-cr ; draw a straight line passing through P i-cr and P i-s . The intersection of this straight line and the guide rail installation plane S1 forms an intersection point P i-rs . Continue to draw a straight line passing through P i-cr and P i-d . The intersection of this straight line and the guide rail installation plane S1 forms an intersection point P i-rd . Then the connection line L i-rs of the above two intersection points P i-rd is the installation direction of the guide rail P i-r . P i is the retracted position of the unloading point i, and P i-rs is the unfolded position of the unloading point i. Adjust the included angle θ i-rd between the guide rail and the straight line connecting P i-rs and P i-rd through height adjustment. In the retracted state, the connection line L i-r between the unloading point P i-rs on the guide rail and the unloading point P i-s on the reflector, and in the unfolded state, the connection line L i-s between the unloading point P i-rd on the guide rail and the unloading point P i-d on the reflector satisfy the length relationship L i-d = L i-s . At the same time, in the retracted state, the included angle θ i-d between L i-s and the connection line between the retracted unloading point P i-s and the unfolded unloading point P i-d on the reflector, and in the unfolded state, the included angle θ i-s between L i-d and the connection line between the retracted unloading point P i-d and the unfolded unloading point P i-d on the reflector, θ i-d θ i-s = θ i-d < 90°.

6. The sliding deployment and unloading system for a bias-feed reflector according to claim 4, characterized in that: Each group of compensation units in the self-balancing height compensation device (3) includes a constant force extension structure (301), an upper sling (302), and a lower sling (303); wherein: The upper end of the upper sling (302) is fixedly connected to the C-shaped pulley (2022) of the guide rail sliding unit (202); the upper end of the constant force elongation structure (301) is connected to the upper sling (302); the lower end is connected to the upper end of the lower sling (303); and the lower end of the lower sling (303) is fixedly connected to the unloading point on the offset feed frame reflector; The constant force extension structure (301) realizes compensation of the length of each unloading hanging rope of the frame reflector, and comprises: an integrated plate (3011), a forward hub (3012), a constant force spring (3013), a reverse hub (3014), and a transmission gear set (3015); two ends of the constant force spring (3013) are respectively wound on the forward hub (3012) and the reverse hub (3014); after the two ends of the constant force spring are installed on the forward hub (3012) and the reverse hub (3013), the constant force spring generates a constant driving torque, driving the forward hub (3012) and the reverse hub (3013) to rotate respectively; wherein, the reverse hub (3013) and the gear set always maintain gear meshing, and the rotation of the reverse hub (3013) drives the transmission gear set (3015) to release or tighten the lower sling (303) wound thereon, thereby realizing adjustment of the unloading rope length of the frame reflector.

7. The sliding deployment and unloading system for an offset feed frame reflector according to claim 1, characterized in that: The second offset angle adjustment device (4) comprises: a main support seat (401), a reversible plate (402), a rotating hinge (403), and an auxiliary support rod (404), wherein: One end of the reversible plate (402) is connected to one end of the main support bracket (401) via a rotating hinge (403); one end of the auxiliary support rod (404) is connected to the middle position of the reversible plate (402); the other end can slide and be fixed on the upper surface of the support bracket (401) to adjust the reversing angle of the reversible plate (402) and maintain the state of the reversible plate (402); The bottom end of the main support seat (401) is provided with a pulley and a fixing structure thereof, which are used to realize the overall movement and fixation of the second offset angle adjustment device (4), thereby completing the maintenance of the position and posture of the frame reflector together with the first offset angle adjustment device (1).

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