Ship space deployable antenna profile division and comparison method

Abstract

The invention relates to the technical field of ship communication, and particularly discloses a ship space deployable antenna profile division and comparison method, which comprises the following steps: performing profile division on a space deployable antenna to obtain a plurality of sub-planes; feature nodes of all the sub-planes are obtained, and the areas of the sub-planes are calculated through a vector cross product method so as to obtain the total area of the sub-planes; projecting the sub-planes on the ideal paraboloid based on parallel projection to correspondingly obtain a plurality of sub-paraboloids; feature nodes of all the sub-paraboloids are obtained, the areas of the sub-paraboloids are calculated through a node area error numerical integration method, and therefore the total area of the sub-paraboloids is obtained; and according to the total area of the sub-planes and the total area of the sub-paraboloids, determining precision values of profile division, comparing the precision values obtained by adopting different profile division modes, and determining an optimal profile division mode. The comparison method is suitable for division and comparison of different space deployable antenna molded surfaces, and a molded surface division mode with high molded surface precision is determined.

Description

Technical Field

[0001] The present invention relates to the technical field of ship communications, and in particular to a method for comparing and dividing the profiles of ship space deployable antennas. Background Art

[0002] Ship antennas are important equipment used for communication, navigation, broadcast reception and distress calls on ships. In the field of ship communications, various types of spatially deployable antenna surfaces have appeared one after another. The surface division of spatially deployable antennas is crucial to the accuracy of the surface. The division process involves the accuracy of node positions and connection methods to ensure the shape and accuracy of the reflecting surface. Reasonable surface division helps to reduce errors that may be introduced during the manufacture, installation, debugging and deployment of the antenna. At present, various polygonal surface division forms are emerging in an endless stream, making it quite difficult to judge and compare which surface division can provide the best surface accuracy during the design stage. Therefore, the technical solution of this application is urgently needed to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a method for comparing the profile division of a ship's spatially deployable antenna, which is suitable for comparing the profile divisions of different spatially deployable antenna profiles and determining a profile division method with high profile accuracy.

[0004] In order to achieve the above object, the present invention provides a method for comparing and dividing the profiles of a ship's spatially deployable antenna, comprising:

[0005] Dividing the spatially deployable antenna into a surface to obtain a plurality of sub-planes;

[0006] Acquire characteristic nodes of each of the sub-planes, and determine node coordinate values ​​of the sub-planes according to the characteristic nodes of the sub-planes;

[0007] According to the node coordinate values ​​of the sub-planes, the area of ​​the sub-planes is calculated by using a vector cross product method, and the areas of the sub-planes are summed to obtain the total area of ​​the sub-planes;

[0008] Projecting the sub-plane onto an ideal parabola based on parallel projection to obtain a plurality of sub-paraboloids;

[0009] Acquire characteristic nodes of each of the sub-paraboloids, and determine node coordinate values ​​of the sub-paraboloids according to the characteristic nodes of the sub-paraboloids;

[0010] According to the node coordinate values ​​of the sub-paraboloids, the area of ​​the sub-paraboloids is calculated by using a node area error numerical integration method, and the areas of the sub-paraboloids are summed to obtain the total area of ​​the sub-paraboloids;

[0011] According to the total area of ​​the sub-planes and the total area of ​​the sub-paraboloids, the precision value of the surface division is determined, and the precision values ​​obtained by using different surface division methods are compared to determine the preferred surface division method.

[0012] In some embodiments, dividing the surface of the spatially deployable antenna includes: dividing the surface into polygons, if the polygons are triangles, then the sub-planes are triangles, if the polygons are larger than three sides, then the polygons larger than three sides are divided into several triangles, and the sub-planes are the divided triangles.

[0013] In some embodiments, the profile is divided into 96 identical sub-planes, each of which is a triangle and has 61 characteristic nodes, corresponding to 61 node coordinate values ​​of the sub-paraboloids.

[0014] In some embodiments, the profile is divided into 64 identical sub-planes, each of which is a quadrilateral and has 81 characteristic nodes, corresponding to 81 node coordinate values ​​of the sub-paraboloids.

[0015] In some embodiments, when calculating the areas of the sub-planes, the 64 quadrilateral sub-planes are divided into 128 triangular sub-planes, and the areas of the 128 triangular sub-planes are calculated respectively.

[0016] In some embodiments, the area of ​​the sub-plane satisfies the following relationship:

[0017]

[0018] The coordinate values ​​of the three nodes of the subplane are A(x1, y1, z1), B(x2, y2, z2), C(x3, y3, z3), S △ABC is the area of ​​the sub-plane.

[0019] In some embodiments, the area of ​​the sub-parabola satisfies the following relationship:

[0020] z=ax 2 +by 2 +cxy+dx+ey+f

[0021]

[0022] Among them, a, b, c, d, e and f are coefficients, x, y, and z are the node coordinate values ​​of the sub-parabola, D = {(x, y)x1≤x≤x2, y1≤y≤y2}, and S is the area of ​​the sub-parabola.

[0023] In some embodiments, the precision value of the profile division satisfies the following relationship:

[0024] ω=S1 / S2

[0025] Wherein, ω is the precision value, S1 is the total area of ​​the sub-plane, and S2 is the total area of ​​the sub-paraboloid.

[0026] In some embodiments, comparing the precision values ​​obtained by using different profile division methods to determine a preferred profile division method includes: the precision value corresponding to the preferred profile division method is closest to 1.

[0027] In some embodiments, the space may deploy an antenna for wireless communications with the vessel.

[0028] The present invention provides a method for comparing and dividing the profiles of deployable antennas in a ship space. Compared with the prior art, the method has the following beneficial effects:

[0029] The area of ​​the sub-plane is calculated by adopting the vector cross product method, and the area of ​​the sub-parabola is calculated by adopting the node area error numerical integration method. Finally, the accuracy value of the surface division is determined according to the total area of ​​the sub-plane and the total area of ​​the sub-parabola. The accuracy values ​​obtained by using different surface division methods are compared to determine the preferred surface division method, which is suitable for comparison of the division of different spatially deployable antenna surfaces, and determines the surface division method with high surface accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic flow chart of a method for comparing and dividing a spatially deployable antenna profile for a ship provided in an embodiment of the present invention.

[0031] Figure 2 A schematic diagram of sub-plane feature nodes of triangulated surface division of a ship's spatially deployable antenna provided in some embodiments of the present invention.

[0032] Figure 3 A schematic diagram of projecting feature nodes of sub-planes divided by triangles of a spatially deployable antenna profile of a ship onto a parabola provided in some embodiments of the present invention.

[0033] Figure 4 A schematic diagram of characteristic nodes of sub-planes divided by triangles of a spatially deployable antenna profile of a ship provided in some embodiments of the present invention.

[0034] Figure 5 A schematic diagram of sub-plane feature nodes of quadrilateral division of a ship's spatially deployable antenna profile provided for other embodiments of the present invention.

[0035] Figure 6Schematic diagram of projection of feature nodes of sub-planes divided into quadrilaterals of a spatially deployable antenna profile of a ship onto a parabola provided in some other embodiments of the present invention.

[0036] Figure 7 Schematic diagram of splitting a quadrilateral sub-plane of a ship spatially deployable antenna profile into triangular sub-planes provided in some other embodiments of the present invention.

[0037] Figure 8 A schematic diagram of the node coordinates of the sub-paraboloids divided by quadrilaterals of the ship's spatially deployable antenna profile provided in some other embodiments of the present invention.

[0038] Fig. 9 A schematic diagram of the area of ​​sub-planes divided by triangles of a spatially deployable antenna profile of a ship provided in some embodiments of the present invention.

[0039] Fig.10 A schematic diagram of node coordinates of sub-planes divided by quadrilaterals of a ship's spatially deployable antenna profile provided for other embodiments of the present invention.

[0040] Fig.11 A front view comparing sub-planes and sub-paraboloids divided by triangles of a spatially deployable antenna profile for a ship provided in some embodiments of the present invention.

[0041] Fig.12 A main schematic diagram for comparison of sub-planes and sub-paraboloids of a quadrilateral division of a ship's spatially deployable antenna profile provided for other embodiments of the present invention.

[0042] Fig.13 Some embodiments of the present invention provide side views showing comparisons of sub-planes and sub-parabolas divided by triangles into a spatially deployable antenna profile for a ship.

[0043] Fig.14 Schematic diagram of the comparison between sub-planes and sub-parabolas of the quadrilateral division of the ship's spatially deployable antenna profile provided in some other embodiments of the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0045] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

[0046] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0047] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0048] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0049] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0052] like Figure 1 As shown, the method for comparing the profiles of deployable antennas in a ship space provided by an embodiment of the present invention comprises the following steps:

[0053] S1. Dividing the spatially deployable antenna into a surface to obtain a plurality of sub-planes;

[0054] S2, obtaining characteristic nodes of each sub-plane, and determining node coordinate values ​​of the sub-plane according to the characteristic nodes of the sub-plane;

[0055] S3. Calculate the area of ​​the sub-plane using the vector cross product method according to the node coordinate values ​​of the sub-plane, and sum the areas of the sub-planes to obtain the total area of ​​the sub-planes;

[0056] S4, projecting the sub-plane onto the ideal parabola based on parallel projection to obtain a plurality of corresponding sub-paraboloids;

[0057] S5, obtaining characteristic nodes of each sub-parabola, and determining node coordinate values ​​of the sub-parabola according to the characteristic nodes of the sub-parabola;

[0058] S6. Calculate the area of ​​the sub-paraboloids according to the node coordinate values ​​of the sub-paraboloids by using the node area error numerical integration method, and sum the areas of the sub-paraboloids to obtain the total area of ​​the sub-paraboloids;

[0059] S7. Determine the precision value of the surface division according to the total area of ​​the sub-planes and the total area of ​​the sub-paraboloids, compare the precision values ​​obtained by using different surface division methods, and determine the preferred surface division method.

[0060] In this embodiment, the area of ​​the sub-plane satisfies the following relationship (1):

[0061]

[0062] The coordinate values ​​of the three nodes of the subplane are A(x1, y1, z1), B(x2, y2, z2), C(x3, y3, z3), S △ABC is the area of ​​the subplane.

[0063] The area of ​​the sub-paraboloid satisfies the following relations (2) and (3) respectively:

[0064] z=ax 2 +by 2 +cxy+dx+ey+f

[0065]

[0066] Among them, a, b, c, d, e and f are coefficients, x, y, and z are the node coordinates of the sub-parabola, D = {(x, y)x1≤x≤x2, y1≤y≤y2}, and S is the area of ​​the sub-parabola.

[0067] The precision value of the surface division satisfies the following relationship (4):

[0068] ω=S1 / S2

[0069] Where ω is the precision value, S1 is the total area of ​​the sub-plane, and S2 is the total area of ​​the sub-paraboloid.

[0070] like Figure 2 As shown, in one embodiment, the profile of the space deployable antenna is divided into 96 identical triangular sub-planes, which are symmetrical on the x-axis and the y-axis. The triangular sub-planes have 61 characteristic nodes, which are marked as A1, A2, A3, A4, A5, B1, B2, B3, B4, B5, B6, C1, C2, C3, C4, C5, C6, C7, D1, D2, D3, D4, D5, D6, D7, D8, E1, E2, E3, E4, E5, E6, E7, E8, E9, F1, F2, F3, F4, F5, F6, F7, F8, G1, G2, G3, G4, G5, G6, G7, H1, H2, H3, H4, H5, H6, I1, I2, I3, I4, I5.

[0071] like Figure 3As shown, based on the principle of parallel projection, each characteristic node and line segment on the triangular sub-plane is completely projected onto the ideal parabolic reflection surface along the vertical direction. After projection, there are corresponding nodes and line segments, and each node and line segment on the plane reflection surface can only correspond to each node and line segment on the ideal parabola, that is, the corresponding uniqueness. The relationship between the projected nodes and line segments remains unchanged, and there is a line segment connecting the two nodes on the plane reflection surface.

[0072] like Figure 4 As shown in the figure, the feature nodes of the triangular sub-plane correspond to the feature nodes of the triangular sub-paraboloid after projection, which are marked as A 11 , A 12 , A 13 , A 14 , A 15 , B 11 , B 12 , B 13 , B 14 , B 15 , B 16 , C 11 , C 12 , C 13 , C 14 , C 15 , C 16 , C 17 , D 11 , D 12 , D 13 , D 14 , D 15 , D 16 , D 17 , D 18 、E 11 、E 12 、E 13 、E 14 、E 15 、E 16 、E 17 、E 18 、E 19 、F 11 、F 12 、F 13 、F 14 、F 15 、F 16 、F 17 、F 18 , G 11 , G 12 , G 13 , G 14 , G 15 , G 16 , G 17 , H 11 , H 12 , H13 , H 14 , H 15 , H 16 ,I 11 ,I 12 ,I 13 ,I 14 ,I 15 The specific node coordinate positions of the triangular sub-paraboloid are shown in the following table:

[0073]

[0074] Since the triangular subplane is symmetrical, we only need to consider the total area of ​​the triangular subplane in the first quadrant, which can be obtained by multiplying the triangular subplane by four. After projection, the nodes of the triangular subplane correspond to the nodes of the corresponding triangular parabola, such as Fig. 9 As shown, the triangular subplane in the first quadrant is represented by the following symbols: S 11 , S 12 , S 13 , S 14 , S 15 , S 21 , S 22 , S 23 , S 24 , S 25 , S 26 , S 31 , S 32 , S 33 , S 34 , S 35 , S 36 , S 37 , S 41 , S 42 , S 43 , S 44 , S 45 , S 46 , S 47 , S 48 Based on the node coordinate values ​​of the triangular sub-plane, the area of ​​each triangular sub-plane is calculated using equation (1), as shown in the following table.

[0075]

[0076] like Figure 5 As shown, in another embodiment, the profile of the space deployable antenna is divided into 64 identical quadrilateral sub-planes, and the quadrilateral sub-planes form a total of 81 characteristic nodes, which are marked as A 111 , A 112 , A 113 , A 114 , A 115 , A116 、A 117 、A 118 、A 119 、B 111 、B 112 、B 113 、B 114 、B 115 、B 116 、B 117 、B 118 、B 119 、C 111 、C 112 、C 113 、C 114 、C 115 、C 116 、C 117 、C 118 、C 119 、D 111 、D 112 、D 113 、D 114 、D 115 、D 116 、D 117 、D 118 、D 119 、E 111 、E 112 、E 113 、E 114 、E 115 、E 116 、E 117 、E 118 、E 119 、F 111 、F 112 、F 113 、F 114 、F 115 、F 116 、F 117 、F 118 、F 119 、G 111 、G 112 、G 113 、G 114 、G 115 、G 116 、G 117 、G 118 、G 119 、H 111 、H 112 、H 113 、H 114 、H 115 、H 116 、H 117 、H 118 、H 119,I 111 ,I 112 ,I 113 ,I 114 ,I 115 ,I 116 ,I 117 ,I 118 ,I 119 .

[0077] like Figure 5 As shown in Figure 1, the nodes and line segments of the quadrilateral subplane are accurately mapped to the ideal parabolic reflector through vertical projection. In this projection, each node and line segment has a unique corresponding point on the parabolic reflector. Specifically, each element on the plane reflector corresponds to only one specific element on the parabolic reflector.

[0078] Due to the wide variety of polygon types, the polygons need to be split and simplified before using this method. By converting quadrilaterals into simpler triangles, the complexity and workload of calculations can be reduced. The symmetry of surface division can be flexibly used to effectively compare and analyze surface accuracy, thereby improving the accuracy and efficiency of the analysis. Figure 7 As shown, in the polygon, a single quadrilateral can be divided into two triangles, so the quadrilateral plane surface division is converted from 64 quadrilateral sub-planes to 128 triangular sub-planes.

[0079] The quadrilateral plane surface partition nodes are projected to correspond to the quadrilateral parabola surface partition nodes, such as Figure 8 As shown, the quadrilateral sub-paraboloid feature node is projected to A 1111 , A 1112 , A 1113 , A 1114 , A 1115 , A 1116 , A 1117 , A 1118 , A 1119 , B 1111 , B 1112 , B 1113 , B 1114 , B 1115 , B 1116 , B 1117 , B 1118 , B 1119 , C 1111 , C 1112 , C 1113 , C 1114 , C 1115 , C 1116 , C 1117 , C 1118 , C 1119 , D 1111 , D1112 , D 1113 , D 1114 , D 1115 , D 1116 , D 1117 , D 1118 , D 1119 、E 1111 、E 1112 、E 1113 、E 1114 、E 1115 、E 1116 、E 1117 、E 1118 、E 1119 、F 1111 、F 1112 、F 1113 、F 1114 、F 1115 、F 1116 、F 1117 、F 1118 、F 1119 , G 1111 , G 1112 , G 1113 , G 1114 , G 1115 , G 1116 , G 1117 , G 1118 , G 1119 , H 1111 , H 1112 , H 1113 , H 1114 , H 1115 , H 1116 , H 1117 , H 1118 , H 1119 ,I 1111 ,I 1112 ,I 1113 ,I 1114 ,I 1115 ,I 1116 ,I 1117 ,I 1118 ,I 1119 The specific node coordinates of the quadrilateral sub-paraboloid are shown in the following table.

[0080]

[0081] Specifically, Fig.10 and 11 As shown in the figure, based on the simplified method of polygon splitting, a single quadrilateral sub-plane is transformed into two triangular sub-planes. In these triangular plane sub-planes, their areas are S 111 , S 112 , S113 , S 114 , S 115 , S 116 , S 117 , S 118 , S 111 , S 122 , S 123 , S 124 , S 125 , S 126 , S 127 , S 128 , S 131 , S 132 , S 133 , S 134 , S 135 , S 136 , S 137 , S 138 , S 141 , S 142 , S 143 , S 144 , S 145 , S 146 , S 147 , S 148 Based on the node coordinate values ​​of the triangular sub-planes, the areas of these triangular sub-planes are calculated using equation (1), as shown in the following table.

[0082]

[0083] Based on the node coordinates of the triangular sub-paraboloid and the node coordinates of the quadrilateral sub-paraboloid, the area of ​​the triangular sub-paraboloid and the area of ​​the quadrilateral sub-paraboloid are calculated using equations (2) and (3), as shown in the following table.

[0084]

[0085] Based on the above table parameters, the total area of ​​the triangular sub-plane is calculated to be 7358875.2mm 2 , the total area of ​​the triangular sub-paraboloid is 7358875.2mm 2 According to equation (4), the accuracy of triangle division is 99.996%. Similarly, the total area of ​​the quadrilateral sub-plane is 5347837.6 mm 2 , the total area of ​​the quadrilateral sub-paraboloid is 5348405.2mm 2 , the precision value ω of the quadrilateral division is calculated according to the relation (4) to be 99.989%. By comparison, it can be seen that in the above two specific size embodiments, the triangular parabola division is more accurate than the quadrilateral parabola division.

[0086] It should be noted that the accuracy of the surface division is related to the division shape and size. The above specific coordinate values ​​involve the dimensional relationship.

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A method for comparing and dividing the profiles of deployable antennas in ship space, characterized in that: include: Dividing the spatially deployable antenna into a plurality of sub-planes; Acquire characteristic nodes of each of the sub-planes, and determine node coordinate values ​​of the sub-planes according to the characteristic nodes of the sub-planes; According to the node coordinate values ​​of the sub-planes, the area of ​​the sub-planes is calculated by using a vector cross product method, and the areas of the sub-planes are summed to obtain the total area of ​​the sub-planes; Projecting the sub-plane onto an ideal parabola based on parallel projection to obtain a plurality of sub-paraboloids; Acquire characteristic nodes of each of the sub-paraboloids, and determine node coordinate values ​​of the sub-paraboloids according to the characteristic nodes of the sub-paraboloids; According to the node coordinate values ​​of the sub-paraboloids, the area of ​​the sub-paraboloids is calculated by using a node area error numerical integration method, and the areas of the sub-paraboloids are summed to obtain the total area of ​​the sub-paraboloids; According to the total area of ​​the sub-planes and the total area of ​​the sub-paraboloids, the precision value of the surface division is determined, and the precision values ​​obtained by using different surface division methods are compared to determine the preferred surface division method.

2. The method for comparing and dividing the profiles of ship space deployable antennas according to claim 1, characterized in that: The surface division of the spatially deployable antenna includes: dividing the surface into polygons, if the polygon is a triangle, the sub-plane adopts a triangle, if the polygon is larger than a polygon with three sides, the polygon larger than three sides is cut into several triangles, and the sub-plane is each cut triangle.

3. The method for comparing and dividing the profiles of ship space deployable antennas according to claim 2, characterized in that: The profile is divided into 96 identical sub-planes, each of which is a triangle and has 61 characteristic nodes, corresponding to which 61 node coordinate values ​​of the sub-paraboloids are obtained.

4. The method for comparing and dividing the profiles of ship space deployable antennas according to claim 2, characterized in that: The profile is divided into 64 identical sub-planes, each of which is a quadrilateral and has 81 characteristic nodes, corresponding to which are obtained the node coordinate values ​​of 81 sub-paraboloids.

5. The method for comparing and dividing the profiles of ship space deployable antennas according to claim 4, characterized in that: When calculating the areas of the sub-planes, the 64 quadrilateral sub-planes are divided into 128 triangular sub-planes, and the areas of the 128 triangular sub-planes are calculated respectively.

6. The method for comparing and dividing the profiles of deployable antennas in ship space according to claim 2, characterized in that: The area of ​​the sub-plane satisfies the following relationship: The coordinate values ​​of the three nodes of the subplane are A(x1, y1, z1), B(x2, y2, z2), C(x3, y3, z3), S △ABC is the area of ​​the sub-plane.

7. The method for comparing and dividing the profiles of deployable antennas in ship space according to claim 2, characterized in that: The area of ​​the sub-parabola satisfies the following relationship: z=ax 2 +by 2 +cxy+dx+ey+f Among them, a, b, c, d, e and f are coefficients, x, y, and z are the node coordinate values ​​of the sub-parabola, D = {(x, y)x1≤x≤x2, y1≤y≤y2}, and S is the area of ​​the sub-parabola.

8. The method for comparing and dividing the profiles of deployable antennas in ship space according to claim 1, characterized in that: The precision value of the profile division satisfies the following relationship: ω=S1 / S2 Wherein, ω is the precision value, S1 is the total area of ​​the sub-plane, and S2 is the total area of ​​the sub-paraboloid.

9. The method for comparing and dividing the profiles of ship space deployable antennas according to claim 8, characterized in that: Comparing the precision values ​​obtained by using different profile division methods and determining a preferred profile division method includes: the precision value corresponding to the preferred profile division method is closest to 1.

10. The method for comparing and dividing the profiles of deployable antennas in ship space according to claim 1, characterized in that: The space can deploy an antenna for wireless communication of the ship.

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