Space antenna cell skeleton structure, method, system, medium and equipment

Abstract

The invention discloses an equal-rib-length equal-gap modular space antenna cell skeleton structure, a generation method, a system, a medium and equipment, and the method comprises the steps: generating an upper-layer initial skeleton structure of a central cell, forming six ribs by connecting lines of six vertexes of a regular hexagon and a geometric center point, and forming the upper-layer initial skeleton structure of the central cell by the six ribs; skeleton structures of other cell elements are generated, the skeleton structures of other cell elements are generated with ribs as units, newly generated ribs are connected with the ribs, so that the vertex of one end of each newly generated rib is known, two vertexes of each newly generated rib serve as key points, and a set of the key points of all the ribs in a single cell element serves as the key point of the cell element; gradually generating all ribs and key points through a path from the center to the edge, and updating all the key points to generate gaps among the cell elements; extending the key point by a distance of a back frame along the direction from the sphere center to the key point to obtain a new key point; and connecting the key points in sequence to obtain a skeleton structure of the whole cell element.

Description

Technical Field

[0001] The present invention relates to the technical field of space reflector antennas, and in particular to a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, a method, a system, a medium and a device. Background Art

[0002] The space reflector antenna is parabolic in shape and can be fitted with a spherical surface. The overall size of the traditional reflector antenna is relatively small, and only one folding and unfolding mechanism is needed to fold the entire antenna and put it into the fairing of the launch vehicle. With the development of space technology, the requirements for antenna performance are getting higher and higher. On the one hand, the size of the antenna can reach more than 100 meters. At this time, a single folding and unfolding mechanism will not be able to meet the folding and transportation requirements. Therefore, it is necessary to decompose the antenna into multiple small modules and design the folding and unfolding mechanisms separately. At the same time, the configuration differences of each module should be as small as possible to reduce the workload in the design process and the risks in the antenna folding and unfolding process; on the other hand, the antenna is required to have the ability of adaptive adjustment.

[0003] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0004] The present invention provides a modular space antenna cell skeleton structure with equal rib length and equal gap, a generation method, a system, a medium and a device. The skeleton structure of the antenna uses spherical fitting to obtain the skeleton structure of each cell, which meets the folding and unfolding requirements of the space antenna while reserving installation space for the adaptive adjustment mechanism between the cells, and at the same time ensures that the rib length of all cells is equal to the gap width left between the cells.

[0005] A method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps includes: Generate an upper initial skeleton structure of the central cell, wherein any point on the spherical surface is used as the geometric center point of the central cell, a circle is drawn on the spherical surface with the geometric center point as the center and the desired rib length as the radius, and any regular hexagon with the circle as the enveloping circle is made, and the lines connecting the six vertices of the regular hexagon and the geometric center point constitute six ribs, and these six ribs constitute the upper initial skeleton structure of the central cell; Generate skeleton structures of other cells. The skeleton structures of other cells are generated in units of ribs. The newly generated ribs are connected to the ribs. Therefore, the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points. The set of key points of all ribs in a single cell is used as the key point of the cell. The key points to be generated are determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the positions of the key points, the key points are established according to the existing geometric constraints. Otherwise, new geometric constraints are established. The key points are established on the basis of the original geometric constraints combined with the new geometric constraints until the positions of the key points are determined. All ribs and key points are gradually generated through the path from the center to the edge, and all key points are updated to generate gaps between cells; the key points are extended along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; the key points are connected in sequence to obtain the skeleton structure of the entire cell.

[0006] In the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the peripheral vertices of the six ribs of the central cell are connected to form a regular hexagon, and the rib length is variable.

[0007] In the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the geometric constraints are determined by the geometric properties of the space rhombus on the sphere.

[0008] In the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the opposite vertices of the space rhombus on the spherical surface are symmetrical along the symmetry plane.

[0009] In the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the symmetry plane is determined by the center of the sphere and another pair of vertices of the space rhombus on the sphere.

[0010] In the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the modular space antenna cell skeleton structure is a symmetrical structure.

[0011] A modular space antenna cell skeleton structure with equal rib lengths and equal gaps is generated via the generation method.

[0012] A cell skeleton generation system for an equal-gap modular space reflector antenna includes: An upper initial skeleton structure generating unit is used to generate an upper initial skeleton structure of a central cell, wherein any point on the spherical surface is used as the geometric center point of the central cell, a circle is drawn on the spherical surface with the geometric center point as the center and the desired rib length as the radius, and any regular hexagon with the circle as the enveloping circle is made, and the lines connecting the six vertices of the regular hexagon and the geometric center point constitute six ribs, and these six ribs constitute the upper initial skeleton structure of the central cell; Generate a skeleton structure generation unit for other cells, which is used to generate the skeleton structure of other cells. The skeleton structure of other cells is generated in units of ribs. The newly generated ribs are connected to the ribs, so the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points. The set of key points of all ribs in a single cell is used as the key point of the cell. The key point to be generated is determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the position of the key point, the key point is established according to the existing geometric constraints. Otherwise, a new geometric constraint is established. The key point is established on the basis of the original geometric constraint combined with the new geometric constraint until the position of the key point is determined. The skeleton structure generation unit is used to gradually generate all ribs and key points along the path from the center to the edge, update all key points to generate gaps between cells; extend the key points along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; connect the key points in sequence to obtain the skeleton structure of the entire cell.

[0013] A computer storage medium includes computer instructions, which, when executed on a computer, cause the computer to execute the method described.

[0014] An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method described is implemented.

[0015] Compared with the prior art, the present invention has the following advantages: based on determining the initial rib size of the central cell and the size of the sphere to be fitted, the present invention generates ribs of equal length from the center to the edge according to certain rules, and then updates the key points of the ribs according to the strategy, and finally successfully fits the antenna skeleton structure using a spherical surface to ensure that the length of each rib is equal to the cell gap within the allowable error range, while meeting the folding and expansion requirements of the modular antenna cell and the installation requirements of the adaptive structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0017] In the attached picture: Figure 1It is a schematic diagram of the process of the present invention; Figure 2 A schematic diagram of the antenna cell skeleton configuration of the present invention; Figure 3 Schematic diagram of two vertex sharing forms of the antenna cell skeleton of the present invention; Figure 4 It is a schematic diagram of the process of generating the upper skeleton structure of the central cell of the present invention; Figure 5 This is a schematic diagram of the upper skeleton structure of the central cell of the present invention; Figure 6 Establish reference point schematic diagram for key points of the present invention; Figure 7 It is a schematic diagram of the position of the symmetry plane of the present invention; Figure 8 A schematic diagram of a situation where a new geometric constraint needs to be established in the present invention; Fig. 9 A schematic diagram of the positions of effective key points of the present invention forming a type of vertex sharing form; Fig.10 This is a schematic diagram of the invalid key point position of the present invention; Fig.11 Establish reference point schematic diagram for key points of the present invention; Fig.12 A schematic diagram of the position of the ribs generated when adding geometric constraints to the present invention; Fig.13 It is the effect diagram of the present invention; Fig.14 This is a schematic diagram of the connection between two adjacent cell ribs of the present invention; Fig.15 A schematic diagram of generating a cell gap according to the present invention; Fig.16 This is the final effect diagram of the present invention; Fig.17 This is the final effect diagram of the present invention.

[0018] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0020] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the present invention. The scope of protection of the present invention shall be determined by the attached claims.

[0021] To facilitate understanding of the embodiments of the present invention, further explanation will be given below by taking specific embodiments as examples in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0022] like Figures 1 to 17 As shown, the method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap includes the following steps: Generate the upper initial skeleton structure of the central cell, where any point on the sphere is used as the geometric center point of the central cell, and a circle is drawn on the sphere with the geometric center point as the center and the desired rib length as the radius. Make any regular hexagon with the circle as the enveloping circle, and the lines connecting the six vertices of the regular hexagon and the geometric center point form six ribs, which constitute the upper initial skeleton structure of the central cell; Generate the skeleton structure of other cells. The skeleton structure of other cells is generated in units of ribs. The newly generated ribs are connected to the ribs, so the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points, and the set of key points of all ribs in a single cell is used as the key points of the cell. The key points to be generated are determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the positions of the key points, the key points are established according to the existing geometric constraints. Otherwise, new geometric constraints are established. The key points are established on the basis of the original geometric constraints combined with the new geometric constraints until the positions of the key points are determined. Further, other cells refer to all cells other than the central cell.

[0023] All ribs and key points are gradually generated through the path from the center to the edge, and all key points are updated to generate gaps between cells; the key points are extended along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; the key points are connected in sequence to obtain the skeleton structure of the entire cell.

[0024] In a preferred implementation of the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the peripheral vertices of the six ribs of the central cell are connected to form a regular hexagon, and the rib length is variable.

[0025] In a preferred implementation of the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the geometric constraints are determined by the geometric properties of the space rhombus on the spherical surface.

[0026] In a preferred implementation of the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, opposite vertices of the space rhombus on the spherical surface are symmetrical along the symmetry plane.

[0027] In a preferred implementation of the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the symmetry plane is determined by the center of the sphere and another pair of vertices of the space rhombus on the sphere.

[0028] In a preferred implementation of the method for generating a modular space antenna cell skeleton structure with equal rib lengths and equal gaps, the modular space antenna cell skeleton structure is a symmetrical structure.

[0029] A modular space antenna cell skeleton structure with equal rib lengths and equal gaps is generated via the generation method.

[0030] A cell skeleton generation system for an equal-gap modular space reflector antenna includes: The upper initial skeleton structure generating unit is used to generate the upper initial skeleton structure of the central cell, wherein any point on the sphere is used as the geometric center point of the central cell, and a circle is drawn on the sphere with the geometric center point as the center and the desired rib length as the radius. Make any regular hexagon with the circle as the enveloping circle, and the lines connecting the six vertices of the regular hexagon and the geometric center point form six ribs, which constitute the upper initial skeleton structure of the central cell; Generate a skeleton structure generation unit for other cells, which is used to generate the skeleton structure of other cells. The skeleton structure of other cells is generated in units of ribs. The newly generated ribs are connected to the ribs, so the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points. The set of key points of all ribs in a single cell is used as the key point of the cell. The key point to be generated is determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the position of the key point, the key point is established according to the existing geometric constraints. Otherwise, a new geometric constraint is established. The key point is established on the basis of the original geometric constraint combined with the new geometric constraint until the position of the key point is determined. The skeleton structure generation unit is used to gradually generate all ribs and key points along the path from the center to the edge, update all key points to generate gaps between cells; extend the key points along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; connect the key points in sequence to obtain the skeleton structure of the entire cell.

[0031] A computer storage medium includes computer instructions, which, when executed on a computer, cause the computer to execute the method described.

[0032] An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method described is implemented.

[0033] In one embodiment, see Figure 2 , showing the configuration of the antenna cell skeleton, the smallest unit is a space rhombus on the sphere. Assuming that the established cell skeleton structure meets the design requirements of equal rib length, the side lengths of all rhombuses are equal. This conclusion provides an important basis for subsequent design.

[0034] See also Figure 3 , showing two types of vertex sharing forms of space rhombus, type 1 vertex 1 and type 2 vertex 2. Type 1 vertex 1 is shared by 3 space rhombuses, and type 2 vertex 2 is shared by 6 space rhombuses. In the antenna skeleton configuration, there are only these two types of vertex sharing forms.

[0035] See also Figure 4 , showing the generation process of the upper skeleton structure of the central cell. Take any point on the sphere as the geometric center point of the central cell, draw a circle on the sphere with the desired rib length as the radius and the geometric center point as the center. Make any regular hexagon with the circle as the enveloping circle. The lines connecting the six vertices of the regular hexagon and the geometric center point form six ribs, which constitute the upper initial skeleton structure of the central cell.

[0036] See also Figure 5 , showing the configuration of the upper skeleton structure of the central cell, which includes a center point and 6 vertices. The distance from the center point to the 6 vertices is equal to the expected rib length, and the 6 vertices form a regular hexagon.

[0037] See also Figure 6 to Figure 7 , shows the method of establishing key points when the existing geometric constraints can uniquely determine the position of the key points of the rib to be established. At this time, there is a key point d to be established and the key points a, b, and c of the known ribs form a spatial rhombus on the sphere. The symmetry plane α is composed of the center of the sphere, the known point b, and the known point c. Then the point d to be established is symmetrical with the known point a about the symmetry plane α, thereby determining the position of the key point d to be established, connecting point b and point d, point c and point d, and line segment bd and line segment cd are the newly generated ribs.

[0038] See also Figures 8 to 12 , shows the method of establishing key points when the existing geometric constraints cannot uniquely determine the position of the key points of the rib to be established. Figure 8, at this time, there is no new key point that can form a spatial rhombus on the sphere with the key points of the existing ribs, so consider establishing a new geometric constraint. The design requires that the configurations between the cells be as equal as possible, that is, the spatial rhombus configurations composed of the ribs are also as equal as possible. Therefore, on the basis of the aforementioned constraint of equal side lengths of the spatial rhombuses, the constraint of equal angles of the spatial rhombuses is added. Adding the constraint of spatial rhombus angles means that the newly established key points and their ribs can uniquely determine the internal angles of the rhombus, that is, the newly constructed key points can completely form any of the two types of vertex sharing forms. Obviously, when only one key point is added, only the generated Fig. 9 The key points at the positions shown can completely constitute one of the two types of vertex sharing forms. Fig.10 Although the key point at the position shown participates in the two types of vertex sharing, it can only form part of the two types of vertex sharing. Another key point needs to be established to meet the requirements of fully forming the two types of vertex sharing. In summary, the next step of key point construction can only be as follows Fig. 9 Key points at the locations shown.

[0039] See also Fig.11 If the angles of each space rhombus are required to be equal, it is obvious that the line connecting the key point f to be established and the shared vertex e can bisect the external angle geh. The point to be established is on the plane determined by the center of the sphere, point e and point i. With the constraints of equal rib length and the point to be established on the sphere, the position of the point to be established can be uniquely determined. The line segment connecting the point to be established f and point e is the newly generated rib. The ribs in other directions are generated according to the above rules. The effect is as follows: Fig.12 .

[0040] See also Fig.13 , continue to generate new key points according to the above two rules, and stop generating when the number of cell circles reaches the requirement, and obtain the initial upper skeleton structure of the whole cell.

[0041] See also Figure 14 to Figure 15 , taking a pair of connected ribs as an example, it shows how to update the key points to leave a cell gap. Find point j and point k on the two connected ribs. The line segment formed by the two points is parallel to the line connecting the center points of the cells to which the two ribs belong, and the distance moved along the line direction is equal, which is equal to half of the expected cell gap width. Perform the above operation on all rib connection points to preliminarily obtain the cell gap. At this time, point j and point k are not on the sphere. Project the two points from the center of the sphere to the sphere itself, and use the projection point as the new key point. At this time, the cell skeleton structure formed by the new key point meets the design requirements of equal configuration and equal gap between cells. The error generated by this method is extremely small and can be ignored in engineering. After this step, the overall cell upper skeleton structure is obtained.

[0042] See also Figure 16 to Figure 17, move all key points along the direction from the center of the sphere to itself by a distance of a back frame, obtain the key points of the lower skeleton structure of the overall cell, and connect all key points in sequence to obtain the skeleton structure of the overall cell. In summary, the design method of the skeleton structure of the modular space reflector antenna generates ribs of equal length from the center to the edge according to certain rules based on the initial rib size and the size of the sphere to be fitted, and then updates the key points of the ribs according to a certain strategy. Finally, the skeleton structure of the antenna is successfully fitted using a spherical surface to ensure that the length of each rib is equal to the cell gap within the allowable error range, while meeting the folding and expansion requirements of the modular antenna cell and the installation requirements of the adaptive structure.

[0043] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present invention, all of which belong to the protection of the present invention.

Claims

1. A method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap, characterized in that: The steps include: Generate an upper initial skeleton structure of the central cell, wherein any point on the spherical surface is used as the geometric center point of the central cell, a circle is drawn on the spherical surface with the geometric center point as the center and the desired rib length as the radius, and any regular hexagon with the circle as the enveloping circle is made, and the lines connecting the six vertices of the regular hexagon and the geometric center point constitute six ribs, and these six ribs constitute the upper initial skeleton structure of the central cell; Generate skeleton structures of other cells. The skeleton structures of other cells are generated in units of ribs. The newly generated ribs are connected to the ribs. Therefore, the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points. The set of key points of all ribs in a single cell is used as the key point of the cell. The key points to be generated are determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the positions of the key points, the key points are established according to the existing geometric constraints. Otherwise, new geometric constraints are established. The key points are established on the basis of the original geometric constraints combined with the new geometric constraints until the positions of the key points are determined. All ribs and key points are gradually generated through the path from the center to the edge, and all key points are updated to generate gaps between cells; the key points are extended along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; the key points are connected in sequence to obtain the skeleton structure of the entire cell.

2. The method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap according to claim 1, characterized in that: Preferably, the peripheral vertices of the six ribs of the central cell are connected to form a regular hexagon, and the rib length is variable.

3. The method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap according to claim 1, characterized in that: The geometric constraints are determined by the geometric properties of spatial rhombuses on the sphere.

4. The method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap according to claim 3, characterized in that: The opposite vertices of the spatial rhombus on the sphere are symmetrical along the symmetry plane.

5. The method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap according to claim 4, characterized in that: The symmetry plane is determined by the center of the sphere and another pair of vertices of the spatial rhombus on the sphere.

6. The method for generating a modular space antenna cell skeleton structure with equal rib length and equal gap according to claim 1, characterized in that: The modular space antenna cell skeleton structure is a symmetrical structure.

7. A modular space antenna cell skeleton structure with equal rib length and equal gap, characterized in that: It is generated via the generation method according to any one of claims 1 to 6.

8. A system for generating a cell skeleton of an equal-gap modular space reflector antenna, characterized in that: These include, An upper initial skeleton structure generating unit is used to generate an upper initial skeleton structure of a central cell, wherein any point on the spherical surface is used as the geometric center point of the central cell, and six points with a distance of the desired rib length are searched along six directions with an angle of 60° between each other with the point as the center, and the six points are all located on the spherical surface, and the geometric center point is respectively connected to the six points, and the geometric center point and the six points respectively form ribs to form an upper initial skeleton structure of the central cell; Generate a skeleton structure generation unit for other cells, which is used to generate the skeleton structure of other cells. The skeleton structure of other cells is generated in units of ribs. The newly generated ribs are connected to the ribs, so the vertex at one end of the newly generated ribs is known. The two vertices of the newly generated ribs are used as key points. The set of key points of all ribs in a single cell is used as the key point of the cell. The key point to be generated is determined by the existing geometric constraints. If the existing geometric constraints uniquely determine the position of the key point, the key point is established according to the existing geometric constraints. Otherwise, a new geometric constraint is established. The key point is established on the basis of the original geometric constraint combined with the new geometric constraint until the position of the key point is determined. The skeleton structure generation unit is used to gradually generate all ribs and key points along the path from the center to the edge, update all key points to generate gaps between cells; extend the key points along the direction from the center of the sphere to itself by a back frame distance to obtain new key points; connect the key points in sequence to obtain the skeleton structure of the entire cell.

9. A computer storage medium, characterized in that: The storage medium includes computer instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 1 to 6.

10. An electronic device, characterized in that: The electronic device comprises: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method according to any one of claims 1 to 6 is implemented.

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