A large high-precision two-dimensional quadric surface antenna

Abstract

A large, high-precision two-dimensional double-foldable curved surface antenna includes a sub-reflector assembly, corresponding side hinges, a root hinge, and a clamping system. The root hinge connects the sub-reflector assembly to the feed source. The root hinge drives the reflector to unfold to a specific angle and lock it, thus maintaining the precise positional relationship between the reflector and the feed source. This solution can address the problems of large spatial unfoldable curved surface structures, such as difficulty in folding and folding during transmission, large multi-plane clamping errors, difficulty in maintaining unfolding accuracy and stiffness, and poor overall thermal stability of the antenna, as well as the contradiction between high-precision pointing and large initial installation and docking errors.

Description

Technical Field

[0001] This invention relates to a large-scale, high-precision two-dimensional twice-expandable curved surface antenna, belonging to the field of large-scale spatial unfoldable curved surface structures. Background Technology

[0002] As the antenna aperture continues to increase, it exceeds the maximum allowable space of the rocket fairing. Therefore, the antenna must be folded into sections on the ground. After the rocket fairing is jettisoned, the satellite and rocket are unlocked, and the antenna is then unfolded to its full size while ensuring a certain level of accuracy.

[0003] Existing deployable planar antennas generally employ deployable trusses, deployable struts, and deployable hinges to achieve their deployment function, depending on accuracy and stiffness requirements, with accuracy and stiffness decreasing in that order. Among them, deployable truss antennas, the existing SAR antenna deployment mechanism, offer high accuracy but have complex strut systems, placing high demands on the folding envelope; deployable strut antennas are typically used for small SAR antenna deployment mechanisms; and deployable hinges are typically used for the folding and deployment of small, low-precision antennas.

[0004] For large curved antennas, the thickness in the folded state can reach half a meter due to their curvature constraints. After one unfolding, the antenna transforms from a segmented state into a complete unit, requiring a second rotation of more than 180° to achieve the precise positional relationship between the antenna and the feed, making it difficult to implement truss and strut arrangements. Furthermore, the precision and stiffness of conventional deployable hinges cannot meet the requirements for high-precision connections and overall rotation between sub-antennas of heavy curved antennas, making it impossible to achieve high-precision two-dimensional secondary unfolding of large curved antennas. Summary of the Invention

[0005] The technical problem solved by this invention is: in view of the problems existing in the current technology, such as the difficulty in the layout of large spatial unfoldable curved surface structures in the transmission state, large multi-plane compression error, difficulty in maintaining unfolding accuracy and stiffness, and poor overall thermal stability of the antenna, a large high-precision two-dimensional secondary unfoldable curved surface antenna is proposed.

[0006] The present invention solves the above-mentioned technical problem through the following technical solution:

[0007] A large, high-precision two-dimensional quadratic unfolded surface antenna includes a first sub-reflector, a second sub-reflector, a third sub-reflector, a first side hinge, a second side hinge, a root hinge, and a clamping system, wherein:

[0008] The first and second sub-reflectors are fixedly connected by a first side hinge, and the second and third sub-reflectors are fixedly connected by a second side hinge. In the retracted state, the second and third sub-reflectors are respectively located on both sides of the first sub-reflector and retracted at a fixed angle. The first, second, and third sub-reflectors are all pressed and retracted by a clamping system. In the unfolded state, the assembly of the first, second, and third sub-reflectors is connected to the feed chamber by a root hinge. The root hinge is used to drive the first, second, and third sub-reflectors to unfold as a whole to a preset angle and then lock them, maintaining a preset positional relationship with the feed.

[0009] The first sub-reflective surface includes a curved honeycomb panel, transverse back ribs, and longitudinal back ribs. The second and third sub-reflective surfaces have the same structure as the first sub-reflective surface. The inner side of the curved honeycomb panel is provided with transverse and longitudinal back ribs that are perpendicular to the direction to provide structural support for the curved honeycomb panel. The number and location of the transverse and longitudinal back ribs are determined according to the design requirements of the curved honeycomb panel.

[0010] The design requirements for the curved honeycomb panel are determined based on the curvature requirements. The design principle for the curvature requirements is that the first sub-reflective surface and the third sub-reflective surface are both chamfered according to the unfolding direction to adapt to the outer envelope of the cylindrical fairing. The design requirements for the curved honeycomb panel include the installation position, height, thickness, and contact surface shape of the transverse back ribs and longitudinal back ribs.

[0011] Each curved honeycomb panel has a pre-installed installation interface for connecting a clamping system. The surface of the curved honeycomb panel is coated to increase emissivity, reduce absorptivity, and lower the surface temperature of the corresponding reflective surface.

[0012] The first side hinge includes a side hinge joint, a first side hinge side lock, and a second side hinge side lock. The second side hinge has the same structural design as the first side hinge. The side hinge joint is located in the middle of the first sub-reflector. The first side hinge side lock and the second side hinge side lock are respectively located on both sides of the length direction of the first sub-reflector, which are used to realize the rigid connection of the first sub-reflector and the control of its retraction and deployment.

[0013] The side hinge joint is selected from a shaft system whose accuracy and stiffness meet the design requirements of the curved honeycomb panel. The first and second side hinge locks are designed as large-gap capture and locking devices to accommodate assembly errors. The large gap is determined according to the maximum direction of thermal deformation of the curved honeycomb panel.

[0014] The root hinge includes an unfolding shaft system, a positioning device, and an active locking device. The unfolding shaft system is a large-clearance shaft system used to connect the first sub-reflector, the second sub-reflector, and the third sub-reflector in the unfolded state to the feed source. The positioning device is located on top of the active locking device. The first sub-reflector, the second sub-reflector, and the third sub-reflector are fixedly connected through the combination of the positioning device and the active locking device and maintain their positional relationship relative to the feed source.

[0015] The clamping system includes a first clamping subsystem, a second clamping subsystem, and a third clamping subsystem, wherein:

[0016] The first clamping subsystem includes four clamping release devices. The first, second, and third clamping subsystems have the same structural design. Each clamping release device adopts a six-way error adaptation design, including an adjusting shim. The adjusting shim is designed with orthogonal waist-shaped holes on both sides to accommodate the normal rotation and movement errors of the clamping system in both directions within the plane of the adjusting shim.

[0017] The orthogonal waist-shaped hole adjusts the setting position and the thickness of the shim to regulate the normal rotation and movement error of the clamping system in both directions within the plane of the shim. The normal rotation and movement error is designed based on the error and matching of the root hinge axis, the first side hinge axis, and the second side hinge axis.

[0018] The root hinge connects the combined reflector of the first, second, and third sub-reflectors to the feed chamber, and drives the reflector assembly to unfold into place and lock it in place to achieve the preset positional relationship between the reflector assembly and the feed. After the assembly is unfolded into place, it is guided and positioned by a positioning device and a locking force is applied by an active locking device. The large-clearance pin set at the center of the unfolding shaft can accommodate deviations in the installation relationship between the reflector assembly and the feed.

[0019] The advantages of this invention compared to the prior art are:

[0020] (1) The present invention provides a large-scale, high-precision two-dimensional secondary unfolding curved surface antenna. Through chamfering, a sub-reflector structure based on curved honeycomb panels, transverse back ribs, and longitudinal back ribs is designed to adapt to the outer envelope of a cylindrical radome. The sub-reflector surface is coated to increase emissivity and reduce absorptivity. A distributed structure design is adopted, with the side hinge joint located at the center of the long side of the self-reflector, and the first and second side hinge locks located at the two ends of the long side of the sub-reflector. The side hinge joint is used for reflector unfolding, and the side hinge joint and side hinge lock together achieve reflector locking to ensure stable connection and relative position maintenance of the antenna relative to the feed source in the unfolded state.

[0021] (2) The root hinge structure designed in this invention consists of an unfolding shaft system, a positioning device, and an active locking device, which can realize the rapid connection and high-precision unfolding of large antennas and satellites, with a pointing accuracy of up to 20″. At the same time, the clamping subsystem is designed to consist of a clamping release device. Each clamping release device adapts to the height and rotation errors in two directions in the plane by adjusting the shims; it adapts to the movement errors and normal rotation errors in two directions in the plane by using two levels of orthogonal waist-shaped holes; and it can effectively adapt to six-directional errors by designing the shim thickness and waist-shaped hole size.

[0022] (3) The antenna structure designed in this invention can realize the block folding and high rigidity and high precision unfolding of a large 6m×4m reflector. By shaping the front of the sub-reflector and reinforcing the back with a variable cross section, the surface accuracy of the 2m×4m sub-reflector RMS0.1mm can be achieved. The high rigidity connection of the curved antenna can be achieved by using the center unfolding and distributed locking side hinge design.

[0023] (4) The root hinge designed in this invention can achieve rapid connection and high-precision deployment of large antennas and satellites through large gap shaft system, positioning and active locking design, so as to ensure pointing accuracy control. The clamping subsystem effectively adapts to six-directional errors, greatly reducing the difficulty of assembling large reflectors and the whole satellite. Attached Figure Description

[0024] Figure 1 A schematic diagram of the collapsed state of a large, high-precision two-dimensional quadratic unfolded curved surface antenna provided by the present invention;

[0025] Figure 2 A schematic diagram of the unfolded state of the large, high-precision two-dimensional quadratic unfolded curved surface antenna provided by the present invention;

[0026] Figure 3 This is a side view and a rear view of the sub-reflective surface provided by the present invention;

[0027] Figure 4 A schematic diagram of the side hinge structure provided by the present invention;

[0028] Figure 5 A schematic diagram of the root hinge structure provided by the present invention;

[0029] Figure 6 This is a schematic diagram illustrating the adjustment measures of the compression release device provided by the present invention. Detailed Implementation

[0030] A large, high-precision two-dimensional double-foldable curved surface antenna includes a sub-reflector assembly, corresponding side hinges, a root hinge, and a clamping system. The root hinge connects the sub-reflector assembly to the feed source. The root hinge drives the reflector to unfold to a specific angle and lock it, thus maintaining the precise positional relationship between the reflector and the feed source. This solution can address the problems of large spatial unfoldable curved surface structures, such as difficulty in folding and folding during transmission, large multi-plane clamping errors, difficulty in maintaining unfolding accuracy and stiffness, and poor overall thermal stability of the antenna, as well as the contradiction between high-precision pointing and large initial installation and docking errors.

[0031] The antenna structure includes a first sub-reflector, a second sub-reflector, a third sub-reflector, a first side hinge, a second side hinge, a root hinge, and a clamping system, wherein:

[0032] The first and second sub-reflectors are fixedly connected by a first side hinge, and the second and third sub-reflectors are fixedly connected by a second side hinge. In the retracted state, the second and third sub-reflectors are respectively located on both sides of the first sub-reflector and retracted at a fixed angle. The first, second, and third sub-reflectors are all pressed and retracted by a clamping system. In the unfolded state, the assembly of the first, second, and third sub-reflectors is connected to the feed chamber by a root hinge. The root hinge is used to drive the first, second, and third sub-reflectors to unfold as a whole to a preset angle and then lock them, maintaining a preset positional relationship with the feed.

[0033] The first sub-reflective surface includes a curved honeycomb panel, transverse back ribs, and longitudinal back ribs. The second and third sub-reflective surfaces have the same structure as the first sub-reflective surface. The inner side of the curved honeycomb panel is provided with transverse and longitudinal back ribs that are perpendicular to each other to provide structural support for the curved honeycomb panel. The number and location of the transverse and longitudinal back ribs are determined according to the design requirements of the curved honeycomb panel.

[0034] The design requirements for curved honeycomb panels are determined based on curvature requirements. The design principle for curvature requirements is that the first and third sub-reflective surfaces are chamfered according to the unfolding direction to adapt to the outer envelope of the cylindrical fairing. The design requirements for curved honeycomb panels include the installation position, height, thickness, and contact surface shape of the transverse and longitudinal back ribs.

[0035] All curved honeycomb panels have pre-installed installation interfaces for connecting and pressing systems. The surface of the curved honeycomb panels is coated to increase emissivity, reduce absorptivity, and lower the surface temperature of the corresponding reflective surface.

[0036] The first side hinge includes a side hinge joint, a first side hinge side lock, and a second side hinge side lock. The second side hinge has the same structural design as the first side hinge. The side hinge joint is located in the middle of the first sub-reflector. The first side hinge side lock and the second side hinge side lock are located on both sides of the length direction of the first sub-reflector, respectively, to realize the rigid connection of the first sub-reflector and control its retraction and deployment.

[0037] The side hinge joints are selected from shaft systems whose precision and stiffness meet the design requirements of the curved honeycomb panel. The first and second side hinge locks are designed as large-clearance capture and locking devices to accommodate assembly errors. The large clearance is determined based on the maximum direction of thermal deformation of the curved honeycomb panel.

[0038] The root hinge includes an unfolding shaft system, a positioning device, and an active locking device. The unfolding shaft system is a large-clearance shaft system used to connect the first sub-reflector, the second sub-reflector, and the third sub-reflector in the unfolded state to the feed source. The positioning device is located on top of the active locking device. The first sub-reflector, the second sub-reflector, and the third sub-reflector are fixedly connected through the combination of the positioning device and the active locking device and maintain their positional relationship relative to the feed source.

[0039] The clamping system includes a first clamping subsystem, a second clamping subsystem, and a third clamping subsystem, wherein:

[0040] The first clamping subsystem includes four clamping release devices. The first, second, and third clamping subsystems have the same structural design. Each clamping release device adopts a six-way error adaptation design, including an adjusting shim. The adjusting shim is designed with orthogonal waist-shaped holes on both sides to accommodate the normal rotation and movement errors of the clamping system in both directions within the plane of the adjusting shim.

[0041] The orthogonal waist-shaped hole adjusts the setting position and the thickness of the shim to regulate the normal rotation and movement error of the clamping system in both directions within the plane of the shim. The normal rotation and movement error is designed based on the error and matching of the root hinge axis, the first side hinge axis, and the second side hinge axis.

[0042] The root hinge connects the combined reflector of the first, second, and third sub-reflectors to the feed chamber, and drives the reflector assembly to unfold into place and lock it in place to achieve the preset positional relationship between the reflector assembly and the feed. After the assembly is fully unfolded into place, it is guided and positioned by a positioning device and a locking force is applied by an active locking device. The large clearance pin set at the center of the unfolding shaft can accommodate deviations in the installation relationship between the reflector assembly and the feed.

[0043] The following description, in conjunction with the accompanying drawings and preferred embodiments, provides further details:

[0044] In the current embodiment, the two-dimensional, double-expanded curved antenna consists of a first sub-reflector, a second sub-reflector, a third sub-reflector, a first side hinge, a second side hinge, a root hinge, a first clamping subsystem, a second clamping subsystem, and a third clamping subsystem. In the transmission state, each sub-reflector is clamped by a clamping subsystem consisting of four corresponding clamping points. The first side hinge connects the first and second sub-reflectors together, enabling relative movement of the first sub-reflector relative to the second sub-reflector and locking after final deployment. The second side hinge connects the third sub-reflector to the second sub-reflector, enabling relative movement of the third sub-reflector relative to the second sub-reflector and locking after final deployment. The root hinge connects the reflector to the feed cabin, and the root hinge drives the reflector to unfold to a specific angle and lock, achieving a precise positional relationship between the reflector and the feed.

[0045] The first, second, and third sub-reflectors are all parabolic cylindrical surfaces, composed of curved honeycomb panels, transverse back ribs, and longitudinal back ribs. The first and third sub-reflectors are chamfered according to the radiation pattern to accommodate the outer envelope of the cylindrical fairing. The curved honeycomb panels are pre-formed according to curvature requirements, and the height, thickness, and contact surface shape of the transverse and longitudinal back ribs are determined based on the installation location and stiffness requirements. An installation interface with the clamping subsystem is reserved based on mechanical analysis results. Simultaneously, to reduce the surface temperature of the reflectors, a coating is applied to the reflector surfaces to increase emissivity and reduce absorptivity.

[0046] Both the first and second side hinges consist of a side hinge joint, a first side hinge side lock, and a second side hinge side lock. The side hinge joint is located in the middle of the sub-reflector, while the first and second side hinge side locks are located on either side of the sub-reflector's length, enabling a high-rigidity, high-precision connection between the sub-reflectors. The side hinge joint employs a high-precision shaft system and a high-rigidity locking device. The side hinge side lock utilizes a large-clearance capture and high-rigidity locking device to effectively accommodate assembly errors.

[0047] The root hinge consists of a deployment shaft system, a positioning device, and an active locking device. The deployment shaft system employs a large-clearance design, allowing for rapid installation / removal of the reflector and feed source via the insertion and removal of the pin. The positioning device ensures accurate antenna orientation through capture, guidance, and positioning, with the pin centered within the aperture. The active locking device achieves precise application of locking force through precise position control, improving repeatability testing accuracy.

[0048] The first, second, and third clamping subsystems each consist of four clamping release devices. Each clamping release device employs six-directional error adaptation measures: adjusting the shims to accommodate height and rotational errors in both in-plane directions; and using two levels of orthogonal oblong holes to accommodate movement errors in both in-plane directions and normal rotational errors.

[0049] Among them, the two-dimensional quadratic unfolding curved surface antenna can achieve segmented folding and high-rigidity, high-precision unfolding of a large 6m×4m reflector. The sub-reflector can achieve a surface accuracy of 0.1 mm RMS for a 2m×4m sub-reflector by shaping the front and reinforcing the back with a variable cross-section.

[0050] Meanwhile, the side hinges, through central unfolding and distributed locking, enable high-rigidity connections for curved antennas. The root hinges, through a large-clearance shaft system, positioning, and active locking design, enable rapid connection and high-precision unfolding of large antennas to the satellite, with a pointing accuracy of up to 20″. The clamping subsystem can effectively accommodate six-directional errors, greatly reducing the difficulty of assembling large reflectors with the entire satellite.

[0051] Example 1:

[0052] In the launch state, each sub-reflector is clamped by a clamping subsystem consisting of four corresponding clamping points; the first side hinge 4 connects the first sub-reflector 1 and the second sub-reflector 2 together, and can realize the relative movement of the first sub-reflector 1 with respect to the second sub-reflector 2 and the locking after final deployment, such as... Figure 1 As shown in Figure a; the second side hinge 5 connects the third sub-reflector 3 and the second sub-reflector 2 together, and can realize the relative movement of the third sub-reflector 3 with respect to the second sub-reflector 2 and the locking after final deployment; the root hinge 6 connects the reflector to the feed, and the root hinge 6 drives the reflector to unfold to a specific angle and lock it, realizing the precise positional relationship between the reflector and the feed, where ● represents the feed, located at the focal point of the curved antenna, as shown in Figure a. Figure 2 As shown.

[0053] The first sub-reflector 1, the second sub-reflector 2, and the third sub-reflector 3 are all composed of curved honeycomb panels 21, transverse back ribs 22, and longitudinal back ribs 23. The first sub-reflector 1 and the third sub-reflector 3 are chamfered according to the radiation pattern to accommodate the outer envelope of the cylindrical fairing. The curved honeycomb panels are pre-formed according to curvature requirements, and the height, thickness, and contact surface shape of the transverse and longitudinal back ribs are determined based on the installation location and stiffness requirements. Preferably, a typical set of parameters is: curved honeycomb panel thickness 40mm, transverse back rib height 100mm–200mm, and longitudinal back rib height 150mm–300mm. Based on the mechanical analysis results, an installation interface with the clamping subsystem is reserved, such as… Figure 3 As shown. Simultaneously, to reduce the surface temperature of the reflective surface, a coating is applied to the curved surface to increase emissivity and reduce absorptivity.

[0054] Both the first side hinge 4 and the second side hinge 5 are composed of a side hinge joint 51, a side lock 52 for the first side hinge 4, and a side lock 53 for the second side hinge 5. The side hinge joint is located in the middle of the sub-reflector surface, while the side locks for the first side hinge 4 and the second side hinge 5 are located on either side of the sub-reflector surface along its length, enabling a high-rigidity, high-precision connection between the sub-reflector surfaces. Figure 4 As shown. The side hinge joint adopts a high-precision shaft system and a high-rigidity locking device. The side hinge lock adopts a large-clearance capture and high-rigidity locking device, which can effectively adapt to assembly errors. The clearance is determined according to the maximum direction of thermal deformation of the curved surface, usually ±100℃ temperature difference, and the clearance value is 5mm.

[0055] The root hinge 6 consists of an unfolding shaft system 61, a positioning device 62, and an active locking device 63, as follows: Figure 5 As shown. The deployment axis system adopts a large-clearance axis system, which allows for quick installation / removal of the reflector and feed source through the insertion and removal of the pins. The positioning device ensures accurate antenna orientation through capture, guidance, and positioning, with the pin centered in the hole. The active locking device achieves precise application of locking force through precise position control, improving repeatability testing accuracy.

[0056] like Figure 1 As shown in Figure b, the first clamping subsystem 7, the second clamping subsystem 8, and the third clamping subsystem 9 each consist of four clamping release devices. Each clamping release device incorporates six-directional error adaptation measures, such as... Figure 6 As shown, the shims 71 are adjusted to accommodate the height and rotational errors in both in-plane directions; the two-stage orthogonal waist-shaped holes 72 and 73 are used to accommodate the movement errors in both in-plane directions and the normal rotational errors. The above-mentioned adaptation amounts must match the sum of the errors of the root hinge 6 axis, the first side hinge 4 axis, and the side hinge axis, and should generally be at least 1.5 times the above-mentioned errors.

[0057] In this embodiment, all parabolic cylindrical surfaces are parabolic cylindrical surfaces, composed of curved honeycomb panels, transverse back ribs, and longitudinal back ribs. The first sub-reflector 1 and the third sub-reflector 3 are both chamfered according to the radiation pattern to adapt to the outer envelope of the cylindrical fairing. Simultaneously, the reflector surfaces are coated to increase emissivity and reduce absorptivity.

[0058] The side hinge consists of a side hinge joint, a first side hinge 4-side lock, and a second side hinge 5-side lock. The side hinge joint is located in the middle of the sub-reflector, while the first side hinge 4-side lock and the second side hinge 5-side lock are located on either side of the sub-reflector along its length. The side hinge joint is used for reflector deployment, and the side hinge joint and the side hinge side lock together achieve reflector locking. The root hinge 6 consists of a deployment shaft system, a positioning device, and an active locking device, enabling rapid connection and high-precision deployment of large antennas to satellites, with a pointing accuracy of up to 20″.

[0059] Each clamping subsystem consists of four clamping release devices. Each clamping release device adapts to the height and rotational errors in two directions in the plane by adjusting the shims; it adapts to the movement errors in two directions in the plane and the normal rotation errors by using two levels of orthogonal waist-shaped holes; and it can effectively adapt to six-way errors by designing the shim thickness and waist-shaped hole size.

[0060] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make possible variations and modifications to the technical solutions of the present invention using the disclosed methods and techniques without departing from the spirit and scope of the invention. Therefore, any simple modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are not permitted.

[0061] Equivalent variations and modifications are all within the protection scope of the technical solution of this invention.

[0062] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna, characterized in that: Includes a first sub-reflector, a second sub-reflector, a third sub-reflector, a first side hinge, a second side hinge, a root hinge, and a clamping system, wherein: The first and second sub-reflectors are fixedly connected by a first side hinge, and the second and third sub-reflectors are fixedly connected by a second side hinge. In the retracted state, the second and third sub-reflectors are respectively located on both sides of the first sub-reflector and retracted at a fixed angle. The first, second, and third sub-reflectors are all pressed and retracted by a clamping system. In the unfolded state, the assembly of the first, second, and third sub-reflectors is connected to the feed chamber by a root hinge. The root hinge is used to drive the first, second, and third sub-reflectors to unfold as a whole to a preset angle and then lock them, maintaining a preset positional relationship with the feed. The first sub-reflective surface includes a curved honeycomb panel, transverse back ribs, and longitudinal back ribs. The second and third sub-reflective surfaces have the same structure as the first sub-reflective surface. The inner side of the curved honeycomb panel is provided with transverse and longitudinal back ribs that are perpendicular to each other to provide structural support for the curved honeycomb panel. The number and location of the transverse and longitudinal back ribs are determined according to the design requirements of the curved honeycomb panel. The design requirements for the curved honeycomb panel are determined based on the curvature requirements. The design principle for the curvature requirements is that the first sub-reflective surface and the third sub-reflective surface are both chamfered according to the unfolding direction to adapt to the outer envelope of the cylindrical fairing. The design requirements for the curved honeycomb panel include the installation position, height, thickness, and contact surface shape of the transverse back ribs and longitudinal back ribs.

2. The large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 1, characterized in that: Each curved honeycomb panel has a pre-installed installation interface for connecting a clamping system. The surface of the curved honeycomb panel is coated to increase emissivity, reduce absorptivity, and lower the surface temperature of the corresponding reflective surface.

3. The large-scale, high-precision two-dimensional quadratic unfolded curved surface antenna according to claim 1, characterized in that: The first side hinge includes a side hinge joint, a first side hinge side lock, and a second side hinge side lock. The second side hinge has the same structural design as the first side hinge. The side hinge joint is located in the middle of the first sub-reflector. The first side hinge side lock and the second side hinge side lock are respectively located on both sides of the length direction of the first sub-reflector, which are used to realize the rigid connection of the first sub-reflector and the control of its retraction and deployment.

4. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 3, characterized in that: The side hinge joint is selected from a shaft system whose accuracy and stiffness meet the design requirements of the curved honeycomb panel. The first and second side hinge locks are designed as large-gap capture and locking devices to accommodate assembly errors. The large gap is determined according to the maximum direction of thermal deformation of the curved honeycomb panel.

5. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 4, characterized in that: The root hinge includes an unfolding shaft system, a positioning device, and an active locking device. The unfolding shaft system is a large-clearance shaft system used to connect the first sub-reflector, the second sub-reflector, and the third sub-reflector in the unfolded state to the feed source. The positioning device is located on top of the active locking device. The first sub-reflector, the second sub-reflector, and the third sub-reflector are fixedly connected through the combination of the positioning device and the active locking device and maintain their positional relationship relative to the feed source.

6. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 5, characterized in that: The clamping system includes a first clamping subsystem, a second clamping subsystem, and a third clamping subsystem, wherein: The first clamping subsystem includes four clamping release devices. The first, second, and third clamping subsystems have the same structural design. Each clamping release device adopts a six-way error adaptation design, including an adjusting shim. The adjusting shim is designed with orthogonal waist-shaped holes on both sides to accommodate the normal rotation and movement errors of the clamping system in both directions within the plane of the adjusting shim.

7. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 6, characterized in that: The orthogonal waist-shaped hole adjusts the setting position and the thickness of the shim to regulate the normal rotation and movement error of the clamping system in both directions within the plane of the shim. The normal rotation and movement error is designed based on the error and matching of the root hinge axis, the first side hinge axis, and the second side hinge axis.

8. A large-scale, high-precision two-dimensional quadratic unfolded surface antenna according to claim 7, characterized in that: The root hinge connects the combined reflector of the first, second, and third sub-reflectors to the feed chamber, and drives the reflector assembly to unfold into place and lock it in place to achieve the preset positional relationship between the reflector assembly and the feed. After the assembly is unfolded into place, it is guided and positioned by a positioning device and a locking force is applied by an active locking device. The large-clearance pin set at the center of the unfolding shaft can accommodate deviations in the installation relationship between the reflector assembly and the feed.

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