CN114171883A - Parabolic cylinder deployable antenna system, control method and application - Google Patents
Parabolic cylinder deployable antenna system, control method and application Download PDFInfo
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- CN114171883A CN114171883A CN202111290029.4A CN202111290029A CN114171883A CN 114171883 A CN114171883 A CN 114171883A CN 202111290029 A CN202111290029 A CN 202111290029A CN 114171883 A CN114171883 A CN 114171883A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- 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
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
- H01Q15/161—Collapsible reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
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Abstract
The invention belongs to the technical field of space-borne antennas, and discloses a parabolic cylinder expandable antenna system, a control method and application, wherein the parabolic cylinder expandable antenna system comprises a star body, a feed source, an antenna module and a guide rail module; the antenna module comprises a base line rib, a parabolic rib, a synchronous gear module and a wire mesh, the guide rail module comprises a fixed support and a guide rail, and the fixed support is coaxially and slidably connected with the guide rail through a circular hole; the upper end of the fixed support is provided with a hole and is connected with the star body through a set screw; the fixing support is provided with a hole at the far satellite end and is connected with a fixing rib part in the antenna module through a set screw. According to the invention, the longitudinal expansion and the transverse expansion of the antenna are linked through the synchronous gear module, and the base line rib is added at the bottom end, so that the horizontal shaking of the antenna during transverse expansion is reduced; the longitudinal expansion and the transverse expansion are effectively linked, and the stability of movement is ensured. The upper surfaces of the rib parts of the antenna are cylindrical surfaces formed by the same parabola, so that signals are effectively converged to the feed source, and the signal precision of the antenna is improved.
Description
Technical Field
The invention belongs to the technical field of space-borne antennas, and particularly relates to an expandable antenna system with a parabolic cylinder, a control method and application.
Background
At present, with the rapid development of aerospace science and technology industry, the demand of large-scale and even ultra-large-scale satellite-borne antennas is more urgent, the parabolic cylinder antenna can realize automatic beam scanning and multi-band signal transmission due to the unique forming mode of the reflecting surface, and meanwhile, compared with the traditional fixed surface reflecting surface antenna, the parabolic cylinder expansion antenna has outstanding advantages in terms of deployable antenna quality and storage ratio, so that the parabolic cylinder expansion antenna becomes a key research object in various aerospace research institutions at home and abroad. In the structure of the parabolic cylinder spread antenna, an antenna module is a main action object of the parabolic cylinder spread antenna for completing task indexes. The antenna module with high storage ratio and light weight is the premise that the parabolic cylinder unfolding antenna accurately receives and transmits signals, and the design of the motion structure influences the unfolding reliability of the antenna.
In 2016, the national space science center of the Chinese academy of sciences designed a solid-surface expandable parabolic cylinder antenna (managed by the crow. expandable parabolic cylinder antenna and separated load structure overall design and analysis [ D ]. national space science center of the Chinese academy of sciences, 2016), and detailed analysis was performed around the structure expansion dynamics problem. Although the fixed surface expandable parabolic cylinder antenna has higher profile accuracy, each reflecting surface of the fixed surface expandable parabolic cylinder antenna is a fixed surface, and the fixed surface expandable parabolic cylinder antenna needs to be fixed around a star during transmission and is expanded after successful orbit entering, so that the folded volume and the weight of the fixed surface expandable parabolic cylinder antenna are larger, and larger burden is added to the transmission of the satellite, and the fixed surface expandable parabolic cylinder antenna is not suitable for large parabolic cylinder expandable antennas. In 2018, Nanjing aerospace university has made intensive research on a structure of a framework-type deployable parabolic cylinder antenna, and proposes a modular deployable parabolic cylinder antenna (Dongcui. design and simulation of a deployment mechanism of the modular deployable parabolic cylinder antenna [ J ]. mechanical manufacturing and automation, 2018,47(06):119 and 123.). The deployable supporting mechanism of the antenna is mainly formed by assembling the deployable rib units in an array mode along the baseline direction and the parabolic direction, and aiming at parabolic cylinder antennas with different calibers and focal lengths, the target parabola can be fitted only by adjusting the number of the deployable units and the sizes of the unit diagonal rods. The mesh parabolic cylinder deployable antenna has the advantage of low quality, but the surface shape precision cannot meet the requirement of a high frequency band.
Therefore, it is necessary to solve the above-mentioned problems and to provide a lightweight, high-precision parabolic deployable antenna.
Through the above analysis, the problems and defects of the prior art are as follows: although the fixed-surface deployment antenna has high profile accuracy, the weight is large, and thus the load of the satellite is increased. The mesh deployable antenna solves the weight problem, but the signal accuracy does not meet the high-frequency band requirement.
The difficulty in solving the above problems and defects is: not only must the precision be considered, but also the light weight must be ensured.
The significance of solving the problems and the defects is as follows: the antenna performance is ensured under the condition of ensuring light weight and high precision, and then the emission cost is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a parabolic cylinder deployable antenna system, a control method and application.
The present invention is achieved in that a parabolic deployable antenna system includes:
the device comprises a star body, a feed source, an antenna module and a guide rail module;
the feed source is a phased array system and is arranged at the focal line position of the parabolic cylinder of the antenna;
the antenna module comprises a base line rib, a parabolic rib, a synchronous gear module and a wire mesh, wherein the base line rib is connected with the bottom end of the parabolic rib through a rotating pin shaft, the synchronous gear module is connected with a central joint in the parabolic rib through the rotating pin shaft, and the two parabolic ribs are connected with the synchronous gear module through the base line rib;
the guide rail module comprises a fixed support and a guide rail, and the fixed support is coaxially and slidably connected with the guide rail through a circular hole; the upper end of the fixed support is provided with a hole and is connected with the star body through a set screw; the fixing support is provided with a hole at the far satellite end and is connected with a fixing rib part in the antenna module through a set screw.
Furthermore, the parabola rib of the antenna module consists of a fixed rib, a folding rib, a center joint and an unfolding rib, the center joint is connected with the synchronous sliding block in a coaxial sliding mode, the lower end of the center joint is provided with a spring, and the spring is used for controlling the reciprocating motion of the synchronous sliding block.
Further, the base line rib, the fixing rib, the folding rib, and the unfolding rib in the antenna module are connected to the rotary joint portion by set screws.
Further, the upper surfaces of the fixing rib, the folding rib and the unfolding rib in the antenna module are all parabolic cylinders formed by the same parabola.
Furthermore, a base line board joint at the tail end of a base line rib of the antenna module is connected with a fixed hinge support on the fixed rib through a rotating pin shaft, so that the antenna module is ensured to be transversely unfolded;
and torsion springs are arranged at rotary joints between the fixed ribs and the folding ribs of the antenna module, and the torsion springs are used for controlling the unfolding and folding of the antenna.
Furthermore, the synchronous gear module of the antenna module consists of a central rod, a base line inclined rod and an auxiliary gear inclined rod, and two ends of the base line inclined rod and two ends of the synchronous rod are connected with the sliding block joints through set screws;
the central rod is provided with a left rod and a right rod which are matched through a gear, and the central rod and the bevel pinion rod are respectively connected with the main gear joint and the bevel pinion joint through set screws; the tail end of the central rod is connected with the central joint through a rotating pin shaft, and the base line inclined rod is connected with the synchronous sliding block through a rotating pin shaft.
Furthermore, a central rod and a base line inclined rod in the synchronous gear module of the antenna module are provided with offset joints, and the offset joints are connected with the rod piece through set screws.
Furthermore, a synchronizing rod is arranged in a synchronizing gear module of the antenna module, the tail end of the synchronizing rod is connected with the base line inclined rod through a rotating pin shaft, and the front end of the synchronizing rod is connected with the pinion inclined rod through a rotating pin shaft.
Another object of the present invention is to provide a control method of a parabolic expandable antenna system, including:
step one, after the star is successfully put into the orbit, torsion is exerted by a torsion spring at a rotary joint between the fixed rib and the folding rib, and the folding rib is bounced from a furled state.
And step two, after the folding ribs are completely bounced from the furled state, the sliding block at the central joint controls the unfolding in the longitudinal direction, the unfolding action in the longitudinal direction is synchronized to the transverse direction through the synchronous gear module, and when the sliding block moves for a specified stroke, the antenna is completely unfolded.
By combining all the technical schemes, the invention has the advantages and positive effects that: the antenna portion of the present invention includes a base line rib, a fixing rib, a folding rib, a center joint, an unfolding rib, a timing gear module, and a wire mesh. The rib parts are connected with the rotary joint through the set screws; the base line rib is connected with the fixed hinge support through the base line board joint and the rotating pin shaft, so that the antenna part cannot horizontally shake when transversely unfolded; the fixed ribs and the folding ribs form revolute pairs through fixed rib rotary joints to finish folding actions; the front ends of the folding ribs are connected with the central joint through the joint and the rotating pin shaft, and the lower ends of the folding ribs are connected with the synchronous slide block through the push rod; the rear end of the unfolding rib is connected with the central joint through a joint and a rotating pin shaft, the lower end of the unfolding rib is connected with the synchronous sliding block through a push rod, and the unfolding rib rotating joint and the central joint form a revolute pair to complete the unfolding action of the antenna; a base line inclined rod at the lower end of the synchronous gear module is connected with the synchronous sliding block through a rotating pin shaft, so that the sliding and transverse unfolding synchronism of the synchronous sliding block is ensured; the two center rods are matched through the gears to determine the position, the movement precision can be improved by utilizing the matching of the gears, and the situation that a certain part of a moving component moves too fast or too slow is prevented to a certain extent; the front end of a synchronous rod of the synchronous gear module is connected with an auxiliary gear inclined rod through a set screw, and the rear end of the synchronous rod of the synchronous gear module is connected with a base line inclined rod through a set screw; the synchronous gear module ensures the motion stability of the antenna part transversely unfolded through the synchronous motion of the synchronous rod and the central rod.
According to the invention, the longitudinal expansion and the transverse expansion of the antenna are linked through the synchronous gear module, and the base line rib is added at the bottom end, so that the horizontal shaking of the antenna during transverse expansion is reduced; the ribs adopt rectangular closed beams and are provided with holes to reduce weight, so that the total weight of the antenna is reduced; the upper end of the synchronous gear module is connected with the central joint, and the lower end of the synchronous gear module is connected with the synchronous sliding block, so that longitudinal expansion and transverse expansion are linked effectively, and the stability of movement is ensured. The upper surfaces of the rib parts of the antenna are cylindrical surfaces formed by the same parabola, so that signals are effectively converged to the feed source, and the signal precision of the antenna is improved. Compared with the prior art, the method also has the following advantages:
1) the base line rib is used in the transverse direction, and the parabolic rib is used in the longitudinal direction, so that the precision of the parabolic cylinder antenna is ensured.
2) In the installation of the synchronous gear module, the adopted rods are all in a carbon fiber structure, so that the total weight of the satellite is further reduced on the basis of ensuring the reliability of the mechanism, and the satellite synchronous gear module has better economy.
3) In the installation of the antenna part, each part of the rib is connected with the corresponding rotary joint by adopting a set screw, and the folding, unfolding, folding and other actions are carried out through a revolute pair formed by the rotary joints.
4) In the installation of the synchronous gear module, the gear matching is arranged, so that the motion stability of the synchronous gear is improved, and the synchronization of longitudinal expansion and transverse expansion is ensured to a certain extent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a parabolic cylinder deployable antenna system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an antenna module of a parabolic cylinder expandable antenna system in a folded state according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a single rib portion in the antenna module according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a synchronous gear module in an antenna module according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a center contact in an antenna module according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a base line rib in an antenna module according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a rail portion provided in an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a synchronous gear module according to an embodiment of the present invention.
Fig. 9, fig. 10 and fig. 11 are experimental diagrams of mechanism simulation provided by the embodiment of the invention; fig. 9 shows the satellite in the folded state, fig. 10(a) and 10(b) show the satellite in the intermediate state, and fig. 11 shows the satellite in the unfolded state.
In the figure: 1. a star body; 2. a feed source; 3. an antenna module; 3-1, a single rib portion; 3-1-1, fixing ribs; 3-1-2, folding ribs; 3-1-3, unfolding ribs; 3-1-4, a central linker moiety; 3-1-4-1, rib joint; 3-1-4-2, push rod; 3-1-4-3, synchronous slide block; 3-1-4-4, a central joint; 3-2, synchronizing the gear module; 3-2-1, a base line diagonal rod; 3-2-2, a synchronizing rod; 3-2-3, main gear set; 3-2-4, an auxiliary gear inclined rod;
3-2-5, a center rod; 3-3, a wire mesh; 3-4, a baseline rib portion; 3-4-1, baseline ribs; 3-4-2 base board connection
A head; 3-4-3 baseline rib rotary joints; 4. a rail portion; 4-1, fixing a support; 4-2, guide rails; 4-3, satellite support.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a parabolic expandable antenna system, a control method and an application thereof, and the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, a star 1 and a feed 2 of the parabolic cylinder expandable antenna system based on the rib and the synchronous gear module according to the embodiment of the present invention are connected to a guide rail portion 4, and a screw hole is formed at a front section of the guide rail portion 4 and connected to an antenna module 3 through a set screw. The two ends of the base line rib part 3-4 are connected with the single rib part through a rotating pin shaft, and the two ends of the synchronous gear module 3-2 are connected with the single rib part through the rotating pin shaft. The base line rib part and the synchronous gear module ensure the synchronization of the transverse expansion and the longitudinal expansion of a plurality of ribs. The rib is arranged above the rib part 3-1 of the single rib and used for fixing the metal wire mesh 3-3 to be attached to the antenna, so that the accuracy of transmitting and receiving signals of the antenna is ensured. The fixed rib 3-1-1 is connected with the folding rib 3-1-2 through a rotating pin shaft, and a torsion spring is arranged at the rotating pin shaft and used for controlling the unfolding action of the folding rib. A spring is arranged below the central joint 3-1-4, the folding ribs 3-1-2 and the unfolding ribs 3-1-3 are connected with the central joint 3-1-4 through a joint and a push rod, so that when the sliding block moves upwards, the folding ribs and the unfolding ribs are unfolded inwards at the same time, and the upper surfaces of the fixing ribs 3-1-1, the folding ribs 3-1-2 and the unfolding ribs 3-1-3 are cylindrical surfaces formed by the same parabola, so that the aim of better combining with a metal wire mesh is to arrange a focus at a feed source and improve the precision of the antenna. In the central joint 3-1-4, a rotary joint 3-1-4-1 is connected with a push rod 3-1-4-2 and a central plate 3-1-4-4 through a rotary pin shaft, a synchronous slide block 3-1-4-3 is coaxially and slidably connected with the central plate 3-1-4-4, and the antenna is transversely unfolded and longitudinally unfolded uniformly through the central plate, so that the synchronism of the antenna is ensured. In the synchronous gear module 3-2 part, two ends of a base line inclined rod 3-2-1 and a synchronous rod 3-2-2 are connected with a sliding block joint through set screws, the front end and the rear end of a central rod 3-2-5 are respectively connected with a main gear joint and a sliding block joint through set screws, and the front end and the rear end of an auxiliary gear inclined rod 3-2-4 are respectively connected with an auxiliary gear joint and a sliding block joint through set screws. The two central rods are matched by a gear to increase the stability of movement. Two ends of the synchronous rod 3-2-2 are connected with the base line inclined rod 3-2-1 and the pinion inclined rod 3-2-4 through a rotating pin shaft, and the unfolding action of the central rod is synchronized to the downward sliding of the synchronous sliding block, so that the longitudinal unfolding and the transverse unfolding of the antenna module are unified. The base line rib 3-4-1 is connected to the base line rib rotary joint 3-4-3 and the base line plate joint 3-4-2 by a set screw. The base line ribs form a revolute pair through the base line rib rotary joints 3-4-3 so as to complete transverse furling action. The guide rail part 4 consists of a fixed support 4-1, a guide rail 4-2 and a satellite support 4-3. The satellite support 4-3 is provided with a small hole which is coaxially and slidably connected with the guide rail.
Fig. 9, 10, and 11 are diagrams of mechanism simulation experiments, fig. 9 is a folded state of the satellite, fig. 10(a) and 10(b) are intermediate states of the satellite, and fig. 11 is an unfolded state of the satellite.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A parabolic expandable antenna system, comprising:
the device comprises a star body, a feed source, an antenna module and a guide rail module;
the feed source is a phased array system and is arranged at the focal line position of the parabolic cylinder of the antenna;
the antenna module comprises a base line rib, a parabolic rib, a synchronous gear module and a wire mesh, wherein the base line rib is connected with the bottom end of the parabolic rib through a rotating pin shaft, the synchronous gear module is connected with a central joint in the parabolic rib through the rotating pin shaft, and the two parabolic ribs are connected with the synchronous gear module through the base line rib;
the guide rail module comprises a fixed support and a guide rail, and the fixed support is coaxially and slidably connected with the guide rail through a circular hole; the upper end of the fixed support is provided with a hole and is connected with the star body through a set screw; the fixing support is provided with a hole at the far satellite end and is connected with a fixing rib part in the antenna module through a set screw.
2. The parabolic expandable antenna system according to claim 1, wherein the parabolic rib of the antenna module is composed of a fixed rib, a folded rib, a center joint and an expanded rib, the center joint is coaxially and slidably connected with the synchronization slider, a spring is provided at a lower end of the center joint, and the spring is used to control the reciprocation of the synchronization slider.
3. The parabolic expandable antenna system of claim 1, wherein the rib sections of the antenna modules are all connected to the swivel section by set screws.
4. The parabolic deployable antenna system of claim 1, wherein the rib upper surfaces of the antenna modules are all parabolic cylinders formed from the same parabola.
5. The parabolic expandable antenna system according to claim 1, wherein the base plate connector at the end of the base rib of the antenna module is connected with the fixed hinge support on the fixed rib through a rotating pin shaft to ensure the transverse expansion of the antenna module;
and torsion springs are arranged at rotary joints between the fixed ribs and the folding ribs of the antenna module, and the torsion springs are used for controlling the unfolding and folding of the antenna.
6. The parabolic expandable antenna system according to claim 1, wherein the synchronizing gear module of the antenna module is composed of a central rod, a base line diagonal rod and a secondary gear diagonal rod, and both ends of the base line diagonal rod and the synchronizing rod are connected with the slider joint through set screws;
the central rod is provided with a left rod and a right rod which are matched through a gear, and the central rod and the bevel pinion rod are respectively connected with the main gear joint and the bevel pinion joint through set screws; the tail end of the central rod is connected with the central joint through a rotating pin shaft, and the base line inclined rod is connected with the synchronous sliding block through a rotating pin shaft.
7. The parabolic expandable antenna system of claim 6, wherein the central rod and the base diagonal of the synchronized gear module of the antenna module are each provided with an offset joint that interfaces with the rod via set screws.
8. The parabolic cylinder deployable antenna system of claim 6, wherein a synchronization rod is provided in the synchronization gear module of the antenna module, and the synchronization rod is connected at its end to the base diagonal rod by a rotation pin and at its front end to the pinion diagonal rod by a rotation pin.
9. A space-borne deployable antenna, characterized in that the space-borne deployable antenna is equipped with the parabolic cylinder deployable antenna system according to any one of claims 1 to 9.
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| CN202111290029.4A CN114171883B (en) | 2021-11-02 | 2021-11-02 | Parabolic cylinder deployable antenna system, control method and application |
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| DAKE TIAN: "Design and Deployment Experiment Research on Support Mechanism for Hexagonal Prism Modular Deployable Antenna", 《2021 IEEE 4TH INTERNATIONAL CONFERENCE ON ELECTRONICS TECHNOLOGY》 * |
| 段宝岩: "大型空间可展开天线的研究现状与发展趋势", 《电子机械工程》 * |
| 陈夜等: "星载柔性可卷天线固有频率提升方法研究", 《航天器工程》 * |
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| Publication number | Publication date |
|---|---|
| CN114171883B (en) | 2022-12-06 |
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