CN110085964B - Net-shaped annular deployable antenna and antenna truss - Google Patents
Net-shaped annular deployable antenna and antenna truss Download PDFInfo
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- CN110085964B CN110085964B CN201910395737.0A CN201910395737A CN110085964B CN 110085964 B CN110085964 B CN 110085964B CN 201910395737 A CN201910395737 A CN 201910395737A CN 110085964 B CN110085964 B CN 110085964B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
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- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
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Abstract
The invention discloses a netlike annular deployable antenna and an antenna truss thereof, wherein the antenna truss comprises an annular structure formed by connecting a plurality of structural units end to end, and a closed annular structure is formed between the structural units through a common cross bar; one structural unit comprises four cross rods, two sliding vertical rods, two main vertical rods, two outward extending vertical rods, four connecting rods, a lower cross rod fixed joint, an upper connecting rod sliding joint, an upper cross rod fixed joint, a lower connecting rod sliding joint, a lower cross rod sliding joint and four hinged joints. The rods of the structure are distributed on three plane layers along the radial direction, so that the furling diameter is effectively reduced, the furling space is fully utilized, and the furling height is greatly reduced. Compared with the similar netted unfolding antenna, the height and diameter of the antenna are remarkably improved, and therefore the unfolding caliber of the antenna is increased under the same folding requirement.
Description
Technical Field
The invention relates to the technical field of satellite-borne deployable antennas, in particular to a mesh annular deployable antenna and an antenna truss thereof.
Background
With the rapid development of space detection technology, satellite antenna technology is one of the fastest developing technologies in satellite payloads in recent years. The annular deployable antenna has the advantages of large caliber, light weight, high precision, high storage ratio and the like, and is considered to be an ideal structural form of the large satellite-borne deployable antenna at present.
The peripheral truss type mesh type deployable antenna is a mesh type deployable antenna proposed by TRW AstroMesh company in the united states, and the AstroMesh series annular truss type deployable antenna can be divided into three generations: the first generation is the AM series, the second is the AM-1 series, and the third is the AM-2 and AM-Lite series. AM-1 is improved in furled diameter relative to AM, AM-Lite of the third generation is subjected to weight reduction design relative to AM-1, and AM-2 is subjected to optimized design relative to AM-1 in furled height, but the furled height of AM-1 or AM-2 is larger than the furled height, so that the height storage ratio is still limited.
The related researchers of Harbin university of industry have proposed a kind of crank block type organization, the whole structure utilizes the double crank block organization to realize the linkage among the units, thus realize the synchronous deployment of the annular truss mechanism; ESA patent 596 proposes an upper and lower two-layer annular structure, each polygon of the antenna consists of an upper and a lower scissor type unfolding mechanisms, and two ends of each scissor type unfolding mechanism slide along a vertical rod in the unfolding process; ESA patent 568 proposes a V-shaped unfolding type conical truss structure, which consists of upper and lower independent V-shaped unfolding mechanisms, wherein rod pieces of the upper and lower V-shaped unfolding mechanisms are unequal to form a trapezoidal polygonal unit, and the unit periodically and repeatedly forms a conical annular truss; in the antennas with the three typical structures, the height of the antenna is always the height of the vertical rod, so that the folded height is always equal to the unfolded height.
Related scholars of the university of west' an electronic technology propose a W-style deployable antenna scheme, and because the truss adopts a vertical asymmetric structure, the breakthrough that the furled height is smaller than the deployed height is realized, but the structure cannot be completely furled to 90 degrees, so the storage ratio in the diameter direction is limited. The W-style expandable antenna solution has a greatly reduced folded height, but when it is used for a mesh expandable antenna, its diameter storage ratio is difficult to increase.
However, the space of the launch vehicle is limited, so the smaller the furled volume of the antenna is, the better, that is, for the antenna with the same unfolding caliber and unfolding height, the smaller the furled diameter and furled height of the antenna are, the better. The annular expandable truss is used as a supporting structure of the whole satellite-borne antenna, the folded diameter and the folded height of the structure determine the folded volume of the whole antenna, and therefore the design of the expandable antenna truss structure with a high storage ratio has great significance.
Disclosure of Invention
The invention aims to solve the problems that the expanded aperture of the current space mesh-shaped annular expandable antenna is limited and the storage ratio of an expandable structure is low, and provides a novel annular expandable truss structure, which can obviously reduce the furled height and furled diameter of an annular truss, thereby obviously reducing the furled volume of a satellite-borne antenna and improving the storage ratio, and further increasing the aperture of the antenna under the same storage requirement.
The technical scheme of the invention is realized as follows:
a netted annular deployable antenna truss comprises an annular structure formed by connecting a plurality of structural units end to end;
the structural unit includes: the device comprises a cross rod, a sliding vertical rod, a main vertical rod, an outward extending vertical rod and a connecting rod; the two cross rods which are arranged in parallel up and down and the two main vertical rods which are respectively parallel left and right are crossed to form a # -shaped main supporting structure; the main vertical rods are arranged between the two cross rods, and the sliding vertical rods and the outward extending vertical rods are respectively arranged at the upper ends and the lower ends of the two main vertical rods in a vertically staggered manner; two ends of the connecting rod are respectively hinged and connected to the cross part between the cross rod and the main vertical rod to realize the synchronous unfolding of the antenna truss;
the adjacent cross rods, the cross rods and the connecting rods, the cross rods and the main vertical rods and the sliding vertical rods and the connecting rods are connected by revolute pairs; the sliding connection between the sliding vertical rods and the main vertical rods is realized through an upper connecting rod sliding joint and an upper transverse rod sliding joint, and the sliding vertical rods and the transverse rods and the connecting rods and the main vertical rods are connected through sliding pairs; the outer extending vertical rods and the main vertical rods, the outer extending vertical rods and the cable net hanging joints, the sliding vertical rods and the cable net hanging joints and the sliding vertical rods and the universal wheel assemblies are connected by adopting fixed pairs;
the antenna truss passes through revolute pair, sliding pair, fixed pair form inside, in, outer three-layer, and two horizontal poles and a slip montant above are located the inlayer, and two main montants, two overhanging montants, four connecting rods are located the intermediate level, and two horizontal poles and a slip montant below are located outwardly.
Further, according to the mesh-shaped annular expandable antenna truss, the inner layer and the middle layer are connected in a sliding manner through the upper connecting rod sliding joint and the upper cross rod sliding joint, the sliding connection between the upper sliding vertical rod and the main vertical rod is realized through the upper cross rod sliding joint, the fixed connection between the upper overhanging vertical rod and the main vertical rod is realized through the upper cross rod fixed joint, and the hinged connection between the cross rod and the connecting rod is realized through the hinged joint;
the middle layer and the outermost layer are fixedly connected with one external vertical rod below through a lower transverse rod fixed joint, the main vertical rod is slidably connected with one external vertical rod below through a lower connecting rod sliding joint and a lower transverse rod sliding joint, and the transverse rod is hinged to the connecting rod through a hinged joint.
Further, the mesh-shaped annular expandable antenna truss is provided with the torsion spring at the hinged position of the cross rod and the connecting rod; the stay cable sequentially penetrates through the end of the cross rod, the lower cross rod fixed joint, the lower cross rod sliding joint and the pulley arranged on the lower connecting rod sliding joint to realize that the stay cable and the torsion spring jointly drive the antenna truss to expand.
Furthermore, as described above, the two main vertical rods parallel to each other on the left and right of the mesh-shaped annular expandable antenna truss are respectively provided with a limiting device for limiting the sliding displacement of the upper connecting rod sliding joint and the lower connecting rod sliding joint.
Further, the mesh-shaped annular expandable antenna truss as described above, the hinge joint comprising: the clamping sleeve, the shaft, the torsion spring and the hinged joint connecting rod connecting piece are connected;
the clamping sleeve is fixed on the cross rod and is connected with the hinged joint connecting rod connecting piece through a shaft, the hinged joint connecting rod connecting piece is movably connected with the shaft, one end of the torsional spring is fixed on the shaft, and the other end of the torsional spring is fixed in the connecting rod connecting piece.
Further, the mesh-shaped annular expandable antenna truss as described above, wherein the upper crossbar sliding joint comprises: the upper linear ball guide sleeve, the upper cross rod sliding joint base, the upper cross rod sliding joint bolt and nut, the upper cross rod connecting piece and the upper main vertical rod connecting piece are arranged on the upper linear ball guide sleeve;
the upper linear ball guide sleeve is arranged in the upper cross rod sliding joint base, the upper cross rod connecting piece is hinged to two sides of the upper cross rod sliding joint base through an upper cross rod sliding joint bolt and a nut, and the upper cross rod connecting piece is fixedly connected with one end of the cross rod respectively; an upper main vertical rod connecting piece which is fixedly connected with one end of a main vertical rod is also fixed on the upper cross rod sliding joint base; the upper linear ball guide sleeve is sleeved on the sliding vertical rod and slides up and down along the sliding vertical rod.
Further, the mesh-shaped annular expandable antenna truss as described above, wherein the lower cross bar fixing joint comprises: the device comprises a lower cross rod fixed joint base, a lower cross rod fixed joint pulley, a lower cross rod fixed joint bolt and nut, a lower fixed joint cross rod connecting piece and a lower outward extending vertical rod connecting piece;
the both sides of sheer pole fixed joint base are passed through sheer pole fixed joint bolt and nut and are articulated to be connected lower fixed joint horizontal pole connecting piece, are provided with sheer pole fixed joint pulley in sheer pole fixed joint base, and the lower overhanging montant connecting piece with sheer pole fixed joint base fixed connection is with the one end fixed connection of the one end of main montant and the one end fixed connection of overhanging montant.
Further, the mesh loop expandable antenna truss as described above, the lower rail sliding joint comprising: the lower cross rod sliding joint comprises a lower cross rod sliding joint bolt and nut, a lower linear ball guide sleeve, a lower main vertical rod connecting piece, a lower cross rod sliding joint pulley, a lower cross rod connecting piece and a lower cross rod sliding joint base;
the lower linear ball guide sleeve is sleeved in the lower cross rod sliding joint base, two ends of the lower cross rod sliding joint base are respectively hinged with a lower cross rod connecting piece through a lower cross rod sliding joint bolt and a lower cross rod nut, and two sides of the inner part of the lower cross rod sliding joint base are respectively provided with the lower cross rod sliding joint pulleys; the lower cross rod connecting piece is fixedly connected with one end of the lower cross rod; and the lower main vertical rod connecting piece is fixedly connected with the cross rod sliding joint base and is fixedly connected with the main vertical rod.
A mesh loop deployable antenna comprising an antenna truss as claimed in any preceding claim.
The invention has the beneficial effects that:
1) aiming at the problems of low storage ratio and small expanded aperture of the current mesh-shaped expandable antenna, an expandable mechanism with high storage ratio is provided. The mechanism is divided into three layers, adopts the principle of a telescopic structure, fully utilizes the volume space after furling, and has obviously improved height and diameter storage ratio compared with the similar netted deployable antenna, thereby realizing the increase of the unfolding caliber of the antenna under the same furling requirement range.
2) The structure adopts a combined driving mode of the torsion spring and the inhaul cable, the torsion spring driving mechanism at the joint is unfolded at a certain angle in the early stage of the unfolding of the mechanism, and then the inhaul cable driving mechanism is further unfolded to a completely unfolded state by the driving motor. And on the premise that the unfolding height and the unfolding caliber are not changed, the variable quantity of the driving cable can be controlled through reasonable arrangement of the rod pieces in the structure.
3) Although the structure is divided into three layers, the driving cables pass through one layer through reasonable layering, so that the possibility that the driving cables are clamped and excessively rubbed due to the fact that the driving cables pass through the layers is avoided, and the influence on the use of the driving cables and the smooth unfolding of the mechanism is avoided.
Drawings
Fig. 1 is a schematic view of a novel mesh deployable antenna scheme of the present invention;
FIG. 2(a) is a front view of a truss unit structure of the present invention;
FIG. 2(b) is a side view of the truss unit structure of the present invention;
FIG. 3 is a schematic view of the bottom rail attachment fitting of the present invention;
FIG. 4 is a schematic view of the upper link sliding joint of the present invention;
FIG. 5 is a schematic view of the upper cross bar sliding joint of the present invention;
FIG. 6 is a cross bar _ link _ hinge joint schematic of the present invention;
FIG. 7 is a schematic view of an upper cross bar attachment joint of the present invention;
FIG. 8 is a schematic view of a lower link slip joint of the present invention;
FIG. 9 is a schematic view of a bottom rail slip joint of the present invention;
fig. 10(a) is a front view of the net-like annular expandable truss of the present invention in a fully collapsed state;
fig. 10(b) is a top view of the net-like annular expandable truss of the present invention in a fully collapsed state;
FIG. 11 is a schematic view of an intermediate expanded state of the lattice-type annular expandable truss of the present invention;
FIG. 12 is a schematic view of the net-like annular expandable truss of the present invention in a fully expanded state;
description of reference numerals:
in fig. 2 (a): 1-overhanging vertical rods; 2-fixing the joint by the lower cross bar; 3-main vertical bar; 4-upper link sliding joint; 5-a connecting rod; 6-upper cross bar sliding joint; 7-sliding vertical rods; 8-cable net hanging joint; 9-an articulated joint; 10-a cross bar; 11-upper cross bar fixed joint; 12-lower link sliding joint; 13-lower rail sliding joint; 14-universal wheel assembly (containing cable net hanging joint);
in fig. 3: 2-1-a lower cross bar fixed joint base, 2-2-a lower cross bar fixed joint pulley, 2-3-a lower cross bar fixed joint bolt and nut, 2-4-a lower fixed joint cross bar connecting piece and 2-5-a lower overhanging vertical bar connecting piece;
in fig. 4: 4-1-upper connecting rod connecting piece, 4-2-upper connecting rod sliding joint bolt and nut, 4-3-upper connecting rod sliding joint base, 4-4-upper linear ball opening guide sleeve (purchased), 4-5-upper main vertical rod connecting piece;
in fig. 5: 6-1-upper linear ball guide sleeve (purchased), 6-2-upper cross bar sliding joint base, 6-3-upper cross bar sliding joint bolt and nut, 6-4-upper cross bar connecting piece and 6-5-upper main vertical bar connecting piece;
in fig. 6: 9-1-stop sleeve, 9-2-shaft, 9-3-torsion spring and 9-4-hinged joint connecting rod connecting piece;
in fig. 7: 11-1-upper cross rod fixed joint bolt and nut, 11-2-upper cross rod fixed joint base, 11-3-upper fixed joint cross rod connecting piece and 11-4-upper overhanging vertical rod connecting piece;
in fig. 8: 12-1-a large pulley bracket, 12-2-a large pulley, 12-3-a lower linear ball opening guide sleeve (purchased), 12-4-a lower connecting rod sliding joint base, 12-5-a lower connecting rod sliding joint bolt and nut, 12-6-a lower connecting rod connecting piece and 12-7-a lower main vertical rod connecting piece;
in fig. 9: 13-1-lower cross bar sliding joint bolt and nut, 13-2-lower linear ball guide sleeve (purchased), 13-3-lower main vertical rod connecting piece, 13-4-lower cross bar sliding joint pulley, 13-5-lower cross bar connecting piece and 13-6-lower cross bar sliding joint base.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention.
Example 1:
the embodiment provides a novel space net-shaped annular expandable antenna truss structure device, the structure of which comprises a plurality of structural units shown in fig. 2(a), wherein a closed annular structure is formed between adjacent units through a common cross rod 10; one of the structural units comprises four cross rods 10, two sliding vertical rods 7, two main vertical rods 3, two outward extending vertical rods 1, four connecting rods 5, a lower cross rod fixed joint 2, an upper connecting rod sliding joint 4, an upper cross rod sliding joint 6, an upper cross rod fixed joint 11, a lower connecting rod sliding joint 12, a lower cross rod sliding joint 13 and four hinged joints 9 for connecting the cross rods and the connecting rods.
The antenna truss adopts an annular hinged type deployable mechanism, the deployed state is a rigid hinged type circular ring, and the folded state is a cylinder. The annular hinged type deployable mechanism comprises five types of rod pieces, namely a cross rod 10, a sliding vertical rod 7, a main vertical rod 3, an outward extending vertical rod 1 and a connecting rod 5. The cross rod 10 and the main vertical rod 3 are combined into a main annular supporting structure, so that the rigidity and stability of the structure are ensured; the sliding vertical rod 7 and the outward extending vertical rod 1 provide the requirement of the antenna unfolding height; the connecting rod 5 mainly plays a role in synchronous unfolding, and meanwhile, the rigidity and the stability of the whole antenna can be enhanced.
Between the above-mentioned adjacent horizontal pole 10, between horizontal pole 10 and the connecting rod 5, between horizontal pole 10 and the main montant 3, all adopt the revolute pair to be connected between slip montant 7 and the connecting rod 5, between slip montant 7 and the main montant 3, between slip montant 7 and the horizontal pole 10, all adopt the vice connection that slides between connecting rod 5 and the main montant 3, between overhanging montant 1 and the cable net attach fitting 8, between slip montant 1 and the cable net attach fitting 8, all adopt the fixed pair to link to each other between slip montant 1 and the universal wheel subassembly 14.
In order to ensure that the mechanism can be completely folded and unfolded and avoid mutual interference among various rod pieces, the structure is designed into an inner layer, a middle layer and an outer layer. As shown in fig. 2(a) and 2(b), the two upper cross rods 10 and the one sliding vertical rod 7 are located in the inner layer, the two main vertical rods 3, the two outward extending vertical rods 1 and the four connecting rods 5 are located in the middle layer, the two lower cross rods 10 and the one sliding vertical rod 7 are located in the outermost layer, the inner layer and the middle layer are connected through the upper connecting rod sliding joint 4, the upper cross rod sliding joint 6, the upper cross rod fixed joint 11 and the hinged joint 9, and the middle layer and the outer layer are connected through the lower cross rod fixed joint 2, the lower connecting rod sliding joint 12, the lower cross rod sliding joint 13 and the hinged joint 9. Therefore, in the process of folding or unfolding the annular truss, the rod pieces of each layer move in three planes which are parallel to each other and do not interfere with each other. When the cross rod 10 moves to be parallel to the main vertical rod 3, namely all the rod pieces are distributed along the vertical direction, the mechanism is in a completely folded state; when the cross bar 10 moves to be perpendicular to the main vertical bar 3, the mechanism is in a fully unfolded state.
As shown in fig. 2(a), 2(b) and 11-12, the adjacent upper cross bars 10 are connected with each other through the upper cross bar sliding joint 6 and the upper cross bar fixed joint 11 to form an annular structure, the adjacent lower cross bars 10 are connected with each other through the lower cross bar fixed joint 2 and the lower cross bar sliding joint 13 to form an annular structure, and the upper cross bars 10 and the lower cross bars 10 are connected with each other through the main vertical bars 3 to jointly form the main annular support frame.
The upper end of a main vertical rod 3 on the left is hinged and rotated with a cross rod 10 on the upper side through an upper cross rod sliding joint 6, the specific connection mode is as shown in figure 5, two sides of an upper cross rod sliding joint base 6-2 are respectively hinged and connected with an upper cross rod connecting piece 6-4, two cross rods 10 on the upper side are respectively fixedly connected with the upper cross rod connecting piece 6-4, the upper end of the main vertical rod 3 is fixedly connected with an upper main vertical rod connecting piece 6-5, and an upper linear ball guide sleeve 6-1 is sleeved at the lower end of a sliding vertical rod 7; the lower end of a main vertical rod 3 on the left is hinged to a lower cross rod 10 through a lower cross rod fixed joint 2, the specific connection mode is as shown in fig. 3, a lower fixed joint cross rod connecting piece 2-4 is hinged to two sides of a lower cross rod fixed joint base 2-1 through a cross rod fixed joint bolt and a nut, the lower two cross rods 10 are respectively and fixedly connected with the lower fixed joint cross rod connecting piece 2-4, and a lower overhanging vertical rod connecting piece 2-5 connects the lower end of the main vertical rod 3 with the upper end of a lower overhanging vertical rod 1 (the main vertical rod 3 and the lower overhanging vertical rod 1 are of an integral structure).
The upper end of the right main vertical rod 3 is hinged with the upper cross rod 10 through the upper cross rod fixed joint 11, the specific connection mode is as shown in fig. 7, the upper fixed joint cross rod connecting piece 11-3 is hinged and connected to the upper cross rod fixed joint base 11-2, the upper two cross rods 10 are respectively fixed on the upper fixed joint cross rod connecting piece 11-3, and the upper outward extending vertical rod connecting piece 11-4 is fixedly connected with the upper end of the right main vertical rod 3 and the lower end of the upper outward extending vertical rod 1 (the main vertical rod 3 and the upper outward extending vertical rod 1 are of an integral structure); the lower end of the right main vertical rod 3 is hinged with the lower cross rod 10 through a lower cross rod sliding joint 13; the specific connection mode is as shown in fig. 9, the lower cross bar connecting pieces 13-5 are hinged to two sides of the lower cross bar sliding joint base 13-6, one end of each of the two lower cross bars 10 is fixedly connected with the lower cross bar connecting pieces 13-5, and the lower main vertical bar connecting pieces 13-3 are fixedly connected with the lower ends of the right main vertical bars 3.
As shown in fig. 2(a) and 2(b), one end of the overhanging vertical rod 1 at the lower left side is fixedly connected with the main vertical rod 3 through the lower cross rod fixed joint 2, the other end is fixedly connected with the cable net hanging joint 8 to provide a cable net supporting point, one end of the overhanging vertical rod 1 at the upper right side is fixedly connected with the main vertical rod 3 through the upper cross rod fixed joint 11, and the other end is fixedly connected with the cable net hanging joint 8 to provide a cable net supporting point.
As shown in fig. 2(a) and 2(b), the lower end of the upper left sliding vertical rod 7 slides with the left main vertical rod 3 through the mutual cooperation of the upper connecting rod sliding joint 4, the connecting rod 5 and the hinged joint 9, and the upper end of the upper left sliding vertical rod 7 is fixedly connected with the cable net hanging joint 8 to provide a cable net supporting point; the concrete structure is shown in figure 4, two sides of an upper connecting rod sliding joint base 4-3 are hinged with an upper connecting rod connecting piece 4-1, one end of a connecting rod 5 is fixedly connected with the upper connecting rod connecting piece 4-1, and an upper linear ball opening guide sleeve 4-4 is sleeved on a main vertical rod 3 and can slide up and down along the main vertical rod; the upper main vertical rod connecting piece 4-5 is fixedly connected with the upper end of the main vertical rod 3; the other end of the connecting rod 5 is hinged with a hinged joint 9 fixedly connected with a cross rod 10 at the lower part, the specific connection mode is that as shown in figure 6, a connecting rod connecting piece 9-4 of the hinged joint is rotatably connected with a clamping sleeve 9-1 through a shaft 9-2, the clamping sleeve 9-1 is fixed on the cross rod 10 at the upper part, and the other end of the connecting rod 5 is fixedly connected with the connecting rod connecting piece 9-4 of the hinged joint, so that the hinged connection of the connecting rod 5 and the cross rod 10 is realized.
The upper end of the sliding vertical rod 7 at the lower right slides with the main vertical rod 3 at the right through the lower connecting rod sliding joint 12, and the other end is fixedly connected with the universal wheel assembly 14 to provide a cable net supporting point and a ground test sliding device; the concrete structure is shown in fig. 8, a lower linear ball opening guide sleeve 12-3 is sleeved on a main vertical rod 3 and can slide up and down along the main vertical rod, a lower main vertical rod connecting piece 12-7 is fixedly connected with the upper end of a sliding vertical rod 7 at the right lower part, two sides of a lower connecting rod sliding joint base 12-4 are respectively hinged with a lower connecting rod connecting piece 12-6, and the lower connecting rod connecting piece 12-6 is hinged with one end of a connecting rod 5; the other end of the connecting rod 5 is hinged to a lower cross bar 10, see fig. 6.
One end of each of the two upper left connecting rods 5 slides through the upper connecting rod sliding joint 4 and the main vertical rod 3 on the left side, the other end of each of the two upper left connecting rods 5 rotates in a hinged mode through the hinged joint 9 and the cross rod 10 on the upper side, one end of each of the two lower right connecting rods 5 slides through the lower connecting rod sliding joint 12 and the main vertical rod 3 on the right side, and the other end of each of the two lower left connecting rods 5 rotates in a hinged mode through the hinged joint.
Example 2:
in the embodiment, on the basis of embodiment 1, the mechanism is driven to unfold by adopting a torsion spring-inhaul cable combined driving mode, namely, a torsion spring is arranged at the hinged position of the cross rod 10 and the connecting rod 5; a guy cable sequentially penetrates through the inside of the cross rod 10 below, the lower cross rod fixed joint 2, the lower cross rod sliding joint 13 and the lower connecting rod sliding joint 12; the specific structure is shown in fig. 6, one end of a torsion spring 9-3 is fixed on a shaft 9-2 of the hinged joint 9, the other end is fixed inside a connecting rod connecting piece 9-4, and when the mechanism is in a furled state, the torsion spring is coiled and wound on the shaft 9-2 to store elastic potential energy. As shown in fig. 2(a), the driving cable penetrates through the inside of the cross bar 10 below and goes around the pulleys arranged on the lower cross bar fixed joint 2, the lower cross bar sliding joint 13 and the lower connecting rod sliding joint 12, the head end and the tail end of the cable are connected to a driving motor of a satellite, the mechanism is driven by the torsion spring 9-1 to cross a dead point position in the early stage of unfolding, and then the cable is wound by the motor, so that the distance between the lower connecting rod sliding joint 12 and the lower cross bar sliding joint 13 is continuously reduced, and the driving mechanism is stably unfolded.
As shown in fig. 3, a lower cross bar fixed joint pulley 2-2 is arranged in a lower cross bar fixed joint base 2-1 of the lower cross bar fixed joint 2; as shown in FIG. 9, a bottom rail slip joint pulley 13-4 is provided within the bottom rail slip joint base 13-6 of the bottom rail slip joint 13; as shown in fig. 8, a large pulley 12-2 is provided on the lower link sliding joint base 12-4 of the lower link sliding joint 12 through a large pulley bracket 12-1, and the cable passes around the lower rail fixed joint pulley 2-2, the lower rail sliding joint pulley 13-4, and the large pulley 12-2 in turn to form a closed loop.
And limiting devices are respectively arranged on the two main vertical rods 3 and are used for preventing the excessive expansion of the structure caused by the over-limit sliding of the upper connecting rod sliding joint 4 and the lower connecting rod sliding joint 12. After the structure is completely unfolded, the inhaul cable is always kept in a tensioning state to stabilize the structure.
Example 3:
on the basis of embodiment 1, the whole annular expandable truss structure can be obtained. Fig. 10(a) and 10(b) are schematic views of the novel mesh-shaped annular truss of the invention in a completely collapsed state, wherein the rods are distributed in a vertical direction; fig. 11 is a schematic view of the expanded intermediate state of the novel mesh-shaped annular truss of the invention; fig. 12 is a schematic view of the novel mesh-shaped annular truss of the invention in a fully expanded state. Adopting a rod piece with the same size as the annular truss shown in the figure 12, taking an annular expandable truss consisting of 12 units as an example, the expansion diameter is 5000mm, the furling diameter is 636mm, the expansion height is 1140mm, and the furling height is 970 mm; considering the mass of the joints, rods, wire mesh and flexible cable mesh, the overall mass of the antenna is 22.15kg, and the areal density is calculated to be about 1.128kg/m 2. Compared with the antennas of the same type, the antenna adopts the layered design, so the diameter accommodation ratio is improved; because the vertical rod adopts a telescopic structure principle, the height storage ratio of the vertical rod is obviously improved (the height storage ratio is more than 1); the areal density also decreased.
As shown in fig. 1, the present invention provides a high-stow-ratio rotating parabolic mesh deployable antenna including the deployable antenna truss according to the above embodiment, which includes: the deployable antenna comprises a deployable truss, a cable net supporting system (a front cable net, a rear cable net, a vertical cable and the like), a metal wire mesh reflecting surface and the like, wherein the deployable truss is used for furling and deploying the deployable antenna under the combined action of a torsion spring and a driving cable, and the cable net supporting system is used for assisting the metal wire mesh to form a required parabolic shape through tension balance design.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A netted annular deployable antenna truss is characterized by comprising an annular structure formed by connecting a plurality of structural units end to end;
the structural unit includes: the device comprises a cross rod (10), a sliding vertical rod (7), a main vertical rod (3), an outward extending vertical rod (1) and a connecting rod (5);
the two cross rods (10) which are arranged in parallel up and down are respectively crossed with the two main vertical rods (3) which are parallel left and right to form a # -shaped main supporting structure; the main vertical rods (3) are arranged between the two cross rods (10), and the sliding vertical rods (7) and the outward extending vertical rods (1) are respectively arranged at the upper ends and the lower ends of the two main vertical rods (3) in an up-and-down staggered manner; two ends of the connecting rod (5) are respectively hinged and connected to the cross part between the cross rod (10) and the main vertical rod (3) to realize the synchronous unfolding of the antenna truss;
the adjacent cross rods (10), the cross rods (10) and the connecting rods (5), the cross rods (10) and the main vertical rods (3) and the sliding vertical rods (7) and the connecting rods (5) are connected by revolute pairs; the sliding connection between the sliding vertical rod (7) and the main vertical rod (3) is realized through an upper connecting rod sliding joint (4) and an upper transverse rod sliding joint (6), and the sliding pair connection is adopted between the sliding vertical rod (7) and the transverse rod (10) and between the connecting rod (5) and the main vertical rod (3); fixing pairs are adopted between the outward extending vertical rod (1) and the main vertical rod (3), between the outward extending vertical rod (1) and the cable net hanging joint (8), between the sliding vertical rod (7) and the cable net hanging joint (8), and between the sliding vertical rod (7) and the universal wheel assembly (14) to be connected;
the antenna truss passes through revolute pair, sliding pair, fixed pair form inside, in, outer three-layer, and two horizontal poles (10) and a slip montant (7) are located the inlayer above, and two main montants (3), two overhanging montants (1), four connecting rods (5) are located the intermediate level, and two horizontal poles (10) and a slip montant (7) are located outwardly below.
2. The netted annular expandable antenna truss as claimed in claim 1, wherein, the sliding connection between the upper sliding vertical rod (7) and the main vertical rod (3) is realized between the inner layer and the middle layer through the upper connecting rod sliding joint (4) and the upper cross rod sliding joint (6), the fixed connection between the upper overhanging vertical rod (1) and the main vertical rod (3) is realized through the upper cross rod fixed joint (11), and the hinged connection between the cross rod (10) and the connecting rod (5) is realized through the hinged joint (9);
the middle layer and the outermost layer are fixedly connected with one external vertical rod (1) through a lower transverse rod fixed joint (2), the main vertical rod (3) is slidably connected with one external vertical rod (7) through a lower connecting rod sliding joint (12) and a lower transverse rod sliding joint (13), and the transverse rod (10) is hinged to the connecting rod (5) through a hinged joint (9).
3. The mesh loop expandable antenna truss of claim 2, wherein a torsion spring is installed at a hinge position of the cross bar (10) and the link (5); the stay cable sequentially penetrates through the pulley arranged on one end of the cross rod (10), the lower cross rod fixed joint (2), the lower cross rod sliding joint (13) and the lower connecting rod sliding joint (12) to realize that the stay cable and the torsion spring jointly drive the antenna truss to unfold.
4. The netted annular expandable antenna truss as claimed in claim 2, wherein limiting means for limiting the sliding displacement of the upper link sliding joint (4) and the lower link sliding joint (12) are respectively provided on the two main vertical rods (3) which are parallel to each other.
5. The mesh annular deployable antenna truss of claim 3, wherein the hinged joint (9) comprises: a clamping sleeve (9-1), a shaft (9-2), a torsion spring (9-3) and a hinged joint connecting rod connecting piece (9-4);
the clamping sleeve (9-1) is fixed on the cross rod (10) and is connected with the hinged joint connecting rod connecting piece (9-4) through a shaft (9-2), the hinged joint connecting rod connecting piece (9-4) is movably connected with the shaft (9-2), one end of the torsion spring (9-3) is fixed on the shaft (9-2), and the other end of the torsion spring is fixed in the connecting rod connecting piece (9-4).
6. The mesh annular deployable antenna truss of claim 3, wherein the upper rail slider joint (6) comprises: an upper linear ball guide sleeve (6-1), an upper cross rod sliding joint base (6-2), an upper cross rod sliding joint bolt and nut (6-3), an upper cross rod connecting piece (6-4) and an upper main vertical rod connecting piece (6-5);
the upper linear ball guide sleeve (6-1) is arranged in the upper cross rod sliding joint base (6-2), the upper cross rod connecting piece (6-4) is hinged to two sides of the upper cross rod sliding joint base (6-2) through an upper cross rod sliding joint bolt and a nut (6-3), and the upper cross rod connecting piece (6-4) is fixedly connected with one end of the cross rod (10) respectively; an upper main vertical rod connecting piece (6-5) fixedly connected with one end of the main vertical rod (3) is also fixed on the upper cross rod sliding joint base (6-2); the upper linear ball guide sleeve (6-1) is sleeved on the sliding vertical rod (7) and slides up and down along the sliding vertical rod.
7. The mesh annular deployable antenna truss of claim 3, wherein the bottom rail fixing joint (2) comprises: a lower cross bar fixed joint base (2-1), a lower cross bar fixed joint pulley (2-2), a lower cross bar fixed joint bolt and nut (2-3), a lower fixed joint cross bar connecting piece (2-4) and a lower outward extending vertical bar connecting piece (2-5);
the two sides of the lower cross rod fixed joint base (2-1) are hinged with lower fixed joint cross rod connecting pieces (2-4) through lower cross rod fixed joint bolts and nuts (2-3), a lower cross rod fixed joint pulley (2-2) is arranged in the lower cross rod fixed joint base (2-1), and lower overhanging vertical rod connecting pieces (2-5) fixedly connected with the lower cross rod fixed joint base (2-1) fixedly connect one end of a main vertical rod (3) with one end of an overhanging vertical rod (1).
8. The mesh annular deployable antenna truss of claim 3, wherein the bottom rail slider joint (13) comprises: a lower cross bar sliding joint bolt and nut (13-1), a lower linear ball guide sleeve (13-2), a lower main vertical bar connecting piece (13-3), a lower cross bar sliding joint pulley (13-4), a lower cross bar connecting piece (13-5) and a lower cross bar sliding joint base (13-6);
the lower linear ball guide sleeve (13-2) is sleeved in the lower cross rod sliding joint base (13-6), two ends of the lower cross rod sliding joint base (13-6) are respectively hinged with a lower cross rod connecting piece (13-5) through a lower cross rod sliding joint bolt and a nut (13-1), and two sides of the inner part of the lower cross rod sliding joint base (13-6) are respectively provided with a lower cross rod sliding joint pulley (13-4); the lower cross bar connecting piece (13-5) is fixedly connected with one end of the lower cross bar (10); and a lower main vertical rod connecting piece (13-3) fixedly connected with the cross rod sliding joint base (13-6) is fixedly connected with the main vertical rod (3).
9. A mesh loop deployable antenna comprising the antenna truss of any one of claims 1-8.
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| CN110970701A (en) * | 2019-09-30 | 2020-04-07 | 中国空间技术研究院 | Conical single-layer annular truss deployable antenna mechanism driven by torsion spring |
| CN110828965A (en) * | 2019-09-30 | 2020-02-21 | 中国空间技术研究院 | Conical annular truss deployable antenna structure based on wheel type synchronous rotating mechanism |
| CN111342190A (en) * | 2020-04-13 | 2020-06-26 | 深圳市威富通讯技术有限公司 | Folding and unfolding structure and folding and unfolding method of log periodic antenna |
| CN111864393B (en) * | 2020-07-28 | 2022-11-04 | 清华大学 | High-storage-ratio annular expandable mesh antenna |
| CN112002982B (en) * | 2020-08-17 | 2021-08-27 | 中国电子科技集团公司第三十八研究所 | Multi-rod type radar side block antenna overturning and locking mechanism |
| CN111934079B (en) * | 2020-09-04 | 2022-12-23 | 西安电子科技大学 | Peripheral truss structure of annular deployable antenna |
| CN112644896B (en) * | 2020-12-07 | 2023-08-25 | 青岛力维环保科技有限公司 | Industrial adjustable purifying equipment |
| CN112711118A (en) * | 2021-01-22 | 2021-04-27 | 北京环境特性研究所 | Back frame and reflecting device |
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