CN115411486A - Two-dimensional unfolding mechanism and method based on solid-surface antenna - Google Patents
Two-dimensional unfolding mechanism and method based on solid-surface antenna Download PDFInfo
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- CN115411486A CN115411486A CN202210936741.5A CN202210936741A CN115411486A CN 115411486 A CN115411486 A CN 115411486A CN 202210936741 A CN202210936741 A CN 202210936741A CN 115411486 A CN115411486 A CN 115411486A
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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
- H01Q1/10—Telescopic elements
- H01Q1/103—Latching means; ensuring extension or retraction 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
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/10—Telescopic elements
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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
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Abstract
The invention discloses a two-dimensional unfolding mechanism and a two-dimensional unfolding method based on a fixed-surface antenna, belonging to the technical field of unfolding mechanisms and comprising three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms, four groups of folding and unfolding mechanisms, a releasing mechanism and a guide rail device; each group of antenna reflecting surface sub-modules comprises five sections of antenna surface units; the antenna surface units are not connected, the positions of the antenna reflecting surfaces are limited by the guide rail devices fixed on the side surfaces of the reflecting surfaces, and the five antenna reflecting surfaces are locked until the second step of unfolding is completed. The unfolding mechanism is mainly used in the first unfolding and connected with the satellite body, and after the first unfolding is completed, the antenna group after the first unfolding is moved to a position to be worked by the space mechanical arm, so that the second unfolding is performed. The invention realizes the two-dimensional expansion of the solid-surface antenna, can realize the simultaneous turnover and locking of a plurality of groups of antenna reflecting surfaces, and meets the requirement of high-precision performance of the whole antenna reflecting surface.
Description
Technical Field
The invention relates to the technical field of unfolding mechanisms, in particular to a structure and a mechanism based on solid-surface antenna unfolding.
Background
Compared with inflatable and metal mesh surface type antennas, the solid reflector antenna is suitable for being applied to satellites with small apertures and high working frequency, and the profile precision of the solid reflector antenna meets the high-precision requirement. The solid surface antenna has the advantages of high precision of a molded surface, high rigidity, high reliability, good thermal stability and the like, and has wide development potential and application background. The fixed surface antenna needs to be folded into a small size in the transmitting stage, and needs to be unfolded into a large unfolding area through the unfolding mechanism during in-orbit running, so that the unfolding mechanism of the fixed surface antenna is a key component for ensuring the normal running of the satellite.
With the development of satellite technology, the application field of space antennas is increasingly wide, and the task complexity gradually rises. The design of the satellite-borne antenna focuses on the design requirements of multiple frequency bands, high precision and large capacity, the design of the satellite antenna gradually tends to be complex, but due to the limitation of rocket carrying capacity, economy and other factors, the structure of the antenna is required to be light in weight and small in size. Based on the above contradiction, the modularized and expandable antenna technology is produced and rapidly developed, and becomes an important way for solving the requirements of satellite antenna such as large aperture, high precision and light weight.
At present, the fixed-surface antenna still falls into the blank in the aspects of the unfolding mode, the structure and the mechanism thereof, which can realize the simultaneous overturning and locking of a plurality of groups of antenna reflecting surfaces.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the unfolding mechanism for the parabolic cylinder surface fixing antenna is provided, the two-dimensional unfolding of the surface fixing antenna is realized, the multiple groups of antenna reflecting surfaces can be simultaneously turned and locked, and the requirement of high-precision performance of the whole antenna reflecting surface is met.
A two-dimensional unfolding mechanism based on a fixed-plane antenna is characterized by comprising three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms, four groups of folding and unfolding mechanisms, a releasing mechanism and a guide rail device; the main body part of each group of antenna reflecting surface sub-modules is five sections of the same antenna surface units.
The three groups of antenna reflecting surface sub-modules are arranged in a stacking mode from top to bottom, and respectively comprise: the antenna sub-module A, the antenna sub-module B and the antenna sub-module C; the antenna sub-module A, the antenna sub-module B and the antenna sub-module C are connected by four groups of folding and unfolding mechanisms; two folding and unfolding mechanisms are laid at the concave surface connecting position of the B antenna sub-module and the C antenna sub-module; two folding and unfolding mechanisms are laid at the convex surface connecting part of the antenna submodule A and the antenna submodule B; according to an XYZ axis coordinate system, the folding and unfolding mechanisms at each joint are distributed in a bilateral symmetry mode on an XZ plane of the coordinate system; the two ends of the B antenna sub-modules are symmetrically distributed along the X-axis direction of the coordinate system, and five pairs of locking mechanisms are laid in the grooves at the two ends from top to bottom.
The antenna sub-module A and the antenna sub-module C are respectively provided with five groups of lock catches from top to bottom on one side close to the folding and unfolding mechanism, and the lock catches are positioned on the middle vertical surface of each antenna surface unit, are fixedly connected with the antenna surface units and are used for aligning and connecting with the locking mechanism; and five groups of releasing mechanisms, a guide rail device and a group of motor pulleys from top to bottom are respectively arranged on one side of the A antenna sub-module and the C antenna sub-module, which is far away from the folding and unfolding mechanism, and the motor pulleys are provided with pulley blocks.
The inside of the antenna surface unit is not connected, the position of the antenna surface unit is limited by a release mechanism and a guide rail device which are fixedly connected on the side surfaces of the antenna surface unit on the antenna submodule A and the antenna submodule C, and the locking and the unfolding of the antenna surface unit are controlled by the release mechanism and the guide rail device, a motor pulley and a pulley block.
Furthermore, the folding and unfolding mechanism consists of a rotating arm, a fixed arm, a large motor and a rotating shaft; a fixed arm of the folding and unfolding mechanism is fixedly connected with the surface of the antenna sub-module B, and a rotating arm is fixedly connected with the surface of the antenna sub-module A and the surface of the antenna sub-module C; the rotating arm is hinged with the fixed arm through a rotating shaft, and a driving device, namely a large motor, is arranged at the tail end of the rotating shaft; the folding and unfolding mechanism is used for overturning and butting the antenna sub-modules, and a large motor arranged on the folding and unfolding mechanism plays a main overturning role.
Furthermore, the release mechanism and the guide rail device mainly comprise a support frame, a sliding groove, a small pulley, a positioning hole, a calibration key, a connecting hole and a spring lock tongue;
the sliding chute and the small pulley are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame, and the pair of pulley blocks are distributed on two sides in the supporting frame and fixedly connected with the supporting frame; the square planes at the two ends of the supporting frame are respectively provided with a positioning hole and a calibration key, a connecting hole and a spring bolt, and the positioning hole and the calibration key are used for connecting the release mechanism and the guide rail device after the antenna mechanism is unfolded; five groups of releasing mechanisms and guide rail devices are stacked in sequence from top to bottom, and the internal connection mode of the releasing mechanisms and the guide rail devices consists of five pulley blocks, a group of ropes and a small motor; the small motor is positioned on the bottom layer supporting frame and used for tightening the rope; the rope is wound on the pulleys of the pulley blocks, the upper end of the rope is fixed with the releasing mechanism on the top layer and the pulleys of the guide rail device, and the lower end of the rope is wound on the motor pulley and is controlled to be retracted and extended through the rotation of the small motor.
Furthermore, the small motors at the lower ends of the release mechanism and the guide rail device tighten the ropes through rotation, so that the release mechanism, the guide rail device and the antenna surface unit are pulled to slide along the sliding groove; the upper-end release mechanism, the guide rail device and the antenna surface unit slide to the critical position at the tail end of the opening of the sliding chute and continue to slide downwards along a plane vertical to the sliding chute on the lower-end support frame; the pair of connecting holes and the pair of calibration keys are positioned on the vertical plane, and the connecting holes and the calibration keys are symmetrically distributed by taking the vertical plane of the vertical plane as a reference; a pair of connecting holes and a pair of spring lock tongues are distributed on a vertical plane at the starting end side of the sliding chute; the positioning holes and the spring lock tongues are symmetrically distributed by taking the vertical plane as a reference; after the release mechanism, the guide rail device and the antenna surface unit slide to the set position, the pair of spring lock tongues extend into the corresponding connecting holes and are locked, and at the moment, all the calibration keys are positioned in the corresponding positioning holes.
The invention also discloses a method for unfolding the two-dimensional unfolding mechanism based on the solid-surface antenna, which is characterized in that the unfolding mode is step-by-step unfolding, and the unfolding process comprises two steps: the first step is to realize the butt joint and the expansion among the sub-modules of the reflecting surface by the work of a folding and expanding mechanism, and the second step is to realize the sliding and the expansion of all the antenna surface units which are tiled; before the fixed-surface antenna is unfolded, the unfolding mechanism is fixed on the B antenna sub-module and is fixedly connected with the satellite body, and explosion bolts are arranged at the connecting positions between the antenna sub-modules and serve as containing frames for limiting the movement of the antenna; in the process of unfolding the antenna, the explosive bolt is automatically broken, a motor of the folding and unfolding mechanism starts to operate, and the rotary butt joint between the antenna sub-modules is controlled; the steel wire rope is pulled through an unfolding mechanism arranged on the satellite body to assist the antenna sub-module A and the antenna sub-module C in rotating butt joint to the antenna sub-module B; in order to ensure the overall shape surface precision of the antenna, locking mechanisms positioned between the antenna sub-modules A and B and between the antenna sub-modules B and C are locked after the butt joint is completed, and the three groups of antenna sub-modules form an integral body to prepare for the second stage of unfolding; the rotation, butt joint and expansion of the antenna sub-modules are completed;
in the second step of unfolding, the small motor starts to work, and the motor pulley is controlled to slowly tighten the ropes wound on the releasing mechanisms and the pulley blocks in the guide rail device, so that the surface units from top to bottom are unfolded along the sliding grooves in the releasing mechanisms and the guide rail device; all the surface units, the release mechanism and the guide rail device are unfolded to a preset position and are locked through a motor pulley; and completing the complete unfolding of the fixed-surface antenna.
Further, the first unfolding process specifically comprises:
when the large motor drives the A antenna sub-module and the C antenna sub-module to carry out rotary butt joint, namely all the surface units of the A antenna sub-module or the C antenna sub-module are turned over along with the surface units, when the upper convex top antenna surface unit of the A antenna sub-module or the C antenna sub-module is turned over to be parallel to the top antenna surface unit of the B antenna sub-module, the lock catch is connected with the locking mechanism, and at the moment, three parallel surface units on each layer form an antenna sub-reflecting surface; carry out spacing braking through installing the spacing bolt on the expansion frame in the expansion mechanism, accomplish the upset action so far, locking mechanism and hasp locking: when the lock catches fixed on the antenna sub-module A and the antenna sub-module C are respectively and rotationally butted to the lock shell positions of the locking mechanisms on the two sides of the antenna sub-module B, the lock catches extrude pressing blocks in the locking mechanisms to enable the pressing blocks to move inwards to the lock catches to be in a pressing state, and the lock catches are locked in six directions by friction angles of lock tongues in the locking mechanisms to the lock catches and extruded by the pressing blocks to the lock catches, so that high-precision locking between the antenna reflecting surfaces is realized; after the A antenna sub-module, the B antenna sub-module and the C antenna sub-module are butted and locked, the antenna reflecting surface needs to be unfolded, at the moment, all the surface units are pulled out of the antenna sub-module unfolded in the first stage by the unfolding mechanism under the action of a small motor, and the releasing action of the antenna reflecting surface is completed to be the unfolding of the antenna reflecting surface, namely, the second-step unfolding is ready for work.
Further, the second unfolding process specifically comprises:
the outer sides of the antenna sub-module A and the antenna sub-module C are respectively fixed with a guide rail device so that each antenna reflecting surface can move relatively; after the antenna is unfolded at the first stage, the small motors and the motor pulleys at the lower ends of the two sides of the antenna respectively pull the ropes at the two sides, and the guide rail device starts to move relatively under the traction driving action of the ropes, so that the reflecting surface of the antenna is driven to be synchronously unfolded; the unfolding speed of the antenna reflecting surface can be controlled by controlling the speed of the tensioning rope; when the antenna is unfolded to reach a set position, the locking device between every two sections of antenna sub-reflecting surfaces is locked, and the locking device consists of a positioning hole, a calibration key, a connecting hole and a spring bolt; in the second stage of unfolding process, the guide rail device before locking is buffered by the spring mechanism until the guide rail device stops, and then the whole process of unfolding the antenna is completed.
Compared with the prior art, the invention has the beneficial effects that:
because the solid-surface antenna has the characteristic of high rigidity, the solid-surface antenna in the field of large-scale spread antennas is required to have the properties of light weight and large caliber. For the common unfolding mode of the existing solid surface antenna, the large solid surface antenna is subjected to a very large bending moment in the unfolding process, and the bending strength, the material characteristics, the fatigue life and the like of the antenna are greatly tested. The unfolding method aims to modularize the large-caliber fixed-surface antenna, greatly reduce the bending moment applied to the reflecting surface of the antenna in the unfolding process, well improve the design space and the safety margin under various indexes of the antenna, well ensure the reliability of the antenna, and reduce the cost and the accommodation space required by the emission of the antenna. In addition, compared with the light-weight design of independent expansion of a common modular antenna, the design of the two-dimensional expansion mechanism ensures that the expanded fixed-surface antenna can be detected and controlled at any expansion stage, can meet the use requirements of various carriers under various task environments, and obviously improves the success rate and the reliability of the expansion of the antenna.
Drawings
Fig. 1 is a schematic view of a folded structure of the parabolic cylinder antenna according to the present invention;
FIG. 2 is a schematic view of the first step of the present invention;
FIG. 3 is a schematic diagram of the second step of the deployment process of the present invention;
FIG. 4 is a schematic view showing the completion of the second expansion step in the present invention;
FIG. 5 is a schematic view of the release mechanism and the guide rail device according to the present invention.
The system comprises an antenna surface unit 1, an unfolding mechanism 2, a releasing mechanism and a guide rail device 3, a small motor 4, a motor pulley 5, a pulley block 6, a locking mechanism 7, a lock catch 8, a large motor 9, a rope 10, an antenna submodule 11, an antenna submodule 12, an antenna submodule 13, a rotating arm 14, a fixing arm 15, a rotating shaft 16, a supporting frame 17, a sliding chute 18, a small pulley 19, a positioning hole 20, a calibration key 21, a connecting hole 22 and a spring bolt 23.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by referring to examples below. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the mechanism of the present invention includes three sets of antenna reflecting surface sub-modules, five pairs of locking mechanisms 7, four sets of folding and unfolding mechanisms 2, a releasing mechanism and a guide rail device 3; the main part of each group of antenna reflecting surface sub-modules is five sections of the same antenna surface units 1 the three groups of antenna reflecting surface sub-modules are arranged in a stacking mode and respectively comprise from top to bottom: an A antenna sub-module 11, a B antenna sub-module 12 and a C antenna sub-module 13.
The antenna sub-module 11A, the antenna sub-module 12B and the antenna sub-module 13C are connected by four groups of folding and unfolding mechanisms 2; two folding and unfolding mechanisms 2 are laid at the concave surface connecting position of the B antenna sub-module 12 and the C antenna sub-module 13; two folding and unfolding mechanisms 2 are laid at the convex surface connecting part of the A antenna sub-module 11 and the B antenna sub-module 12.
According to an XYZ-axis coordinate system, the folding and unfolding mechanisms 2 at each joint are distributed in bilateral symmetry on an XZ plane of the coordinate system; the B antenna sub-modules 12 are symmetrically distributed at two ends along the X-axis direction of the coordinate system, and five pairs of locking mechanisms 7 are laid in grooves at the two ends from top to bottom; five groups of lock catches 8 from top to bottom are respectively arranged on one side of the A antenna sub-module 11 and the C antenna sub-module 13 close to the folding and unfolding mechanism 2, and the lock catches 8 are positioned on the middle vertical surface of each antenna surface unit 1, fixedly connected with the antenna surface units 1 and used for aligning and connecting the locking mechanisms 7.
The antenna submodule A11 and the antenna submodule C13 are respectively provided with five groups of releasing mechanisms and guide rail devices 3 and a group of motor pulleys 5 from top to bottom on one side far away from the folding and unfolding mechanism 2, and the motor pulleys 5 are provided with pulley blocks 6; the inside of the antenna face unit 1 is not connected, the position of the antenna face unit 1 is limited by a release mechanism and a guide rail device 3 which are fixedly connected on the side face of the antenna face unit 1 on an antenna submodule A11 and an antenna submodule C13, and the locking and the unfolding of the antenna face unit 1 are controlled by the release mechanism and the guide rail device 3, a motor pulley 5 and a pulley block 6.
As shown in fig. 2, the folding and unfolding mechanism 2 is composed of a rotating arm 14, a fixed arm 15, a large motor 9 and a rotating shaft 16; a fixed arm 15 of the folding and unfolding mechanism 2 is fixedly connected with the surface of the B antenna sub-module 12, and a rotating arm 14 is fixedly connected with the surfaces of the A antenna sub-module 11 and the C antenna sub-module 13; the rotating arm 14 is hinged with the fixed arm 15 through a rotating shaft 16, and a driving device, namely a large motor 9, is arranged at the tail end of the rotating shaft 16; the folding and unfolding mechanism 2 is used for overturning and butting the antenna sub-modules, and a large motor 9 arranged on the folding and unfolding mechanism 2 plays a main overturning role.
As shown in fig. 5, the release mechanism and guide device 3 mainly comprises a supporting frame 17, a sliding groove 18, a small pulley 19, a positioning hole 20, a calibration key 21, a connecting hole 22, and a spring latch 23; the sliding chute 18 and the small pulley 19 are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame 17, and the pair of pulley blocks 6 are distributed on two sides in the supporting frame 17 and fixedly connected with the supporting frame 17; the square planes at the two ends of the supporting frame 17 are respectively provided with a positioning hole 20, a calibration key 21, a connecting hole 22 and a spring bolt 23, and the positioning hole and the calibration key are used for connecting the release mechanism after the antenna mechanism is unfolded with the guide rail device 3; five groups of releasing mechanisms and guide rail devices 3 are stacked in sequence from top to bottom, and the internal connection mode of the releasing mechanisms and the guide rail devices is composed of five pulley blocks 6, a group of ropes 10 and a small motor 4; the small motor 4 is positioned on the bottom layer supporting frame 17 and is used for tightening the rope 10; the rope 10 is wound on the pulleys of the pulley blocks 6, the upper end of the rope 10 is fixed with the releasing mechanism at the top layer and the pulley of the guide rail device 3, and the lower end of the rope 10 is wound on the motor pulley 5 and controlled to be wound and unwound by the rotation of the small motor 4.
The small motor 4 at the lower end of the release mechanism and guide rail device 3 tightens the rope 10 through rotation, so as to draw the release mechanism and guide rail device 3 and the antenna surface unit 1 to slide along the chute 18; the upper-end release mechanism and the guide rail device 3 slide to the critical position of the tail end of the opening of the sliding chute together with the antenna surface unit 1, and continue to slide downwards along the plane vertical to the sliding chute 18 on the lower-end support frame 17; the pair of connecting holes 22 and the pair of calibration keys 21 are positioned on the vertical plane, and the connecting holes 22 and the calibration keys 21 are symmetrically distributed by taking the vertical plane of the vertical plane as a reference; a pair of connecting holes 22 and a pair of spring lock tongues 23 are distributed on the vertical plane at the starting end side of the sliding groove; the positioning holes 20 and the spring bolts 23 are symmetrically distributed by taking the vertical plane as a reference; after the release mechanism and the guide rail device 3 and the antenna surface unit 1 slide to a predetermined position, the pair of spring bolts 23 extend into the corresponding connecting holes 22 and are locked, and at this time, all the calibration keys 21 are located in the corresponding positioning holes 20.
As shown in fig. 3 to 4, the unfolding mode is a step-by-step unfolding, and the unfolding process is divided into two steps: the first step is to realize the butt joint and the expansion among the sub-modules of the reflecting surface by the work of the folding and expanding mechanism 2, and the second step is to realize the sliding and the expansion of the tiling of all the antenna surface units 1 by the work of the small motor 4 and the motor pulley 5.
The first step of the unfolding process specifically comprises the following steps: when the large motor 9 drives the a antenna submodule 11 and the C antenna submodule 13 to carry out rotary butt joint, namely all the face units 1 of the a antenna submodule 11 or the C antenna submodule 13 are turned over along with each other, when the upper convex top antenna face unit 1 of the a antenna submodule 11 or the C antenna submodule 13 is turned over to be parallel and level with the top antenna face unit 1 of the B antenna submodule 12, the lock catch 8 is connected with the locking mechanism 7, and at the moment, three face units 1 parallel and level with each layer form an antenna sub reflecting face; spacing braking is carried out through installing the spacing bolt on the expansion frame in the expansion mechanism, so far accomplishes the upset action, and locking mechanism 7 locks with hasp 8: when the lock catches 8 fixed on the antenna sub-module 11A and the antenna sub-module 13C are respectively and rotationally butted to the lock shell positions of the locking mechanisms 7 at two sides of the antenna sub-module 12B, the lock catches 8 extrude the pressing blocks in the locking mechanisms 7 to enable the pressing blocks to move inwards to the lock catches to be in a pressing state, and the lock catches are locked in six directions by the friction angle of the lock tongues in the locking mechanisms 7 and the friction of the pressing blocks on the lock catches, so that the high-precision locking between the reflecting surfaces of the antennas is realized; after the antenna sub-module 11A, the antenna sub-module 12B and the antenna sub-module 13C are butted and locked, the antenna reflecting surface needs to be unfolded, at the moment, all the surface units are pulled out of the antenna sub-module unfolded in the first stage by the unfolding mechanism under the action of a small motor, and the releasing action of the antenna reflecting surface is completed to be the unfolding of the antenna reflecting surface, namely, the preparation work is prepared for the second-step unfolding.
The second step of the unfolding process comprises the following specific steps: the outer sides of the antenna submodule 11A and the antenna submodule 13C are respectively fixed with a guide rail device 3, so that each antenna reflecting surface can move relatively; as shown in fig. 3, after the antenna is unfolded at the first stage, the small motors 4 and the motor pulleys 5 at the lower ends of the two sides of the antenna respectively pull the ropes 10 at the two sides, and the guide rail device starts to move relatively under the traction driving action of the ropes, so as to drive the antenna reflecting surface to be unfolded synchronously; the unfolding speed of the antenna reflecting surface can be controlled by controlling the speed of the tensioning rope; when the antenna is unfolded to reach the set position, the locking device between every two sections of antenna sub-reflecting surfaces is locked, and in the second-stage unfolding process, the guide rail device 3 before being locked is buffered by the spring mechanism until the guide rail device stops, so that the whole process of unfolding the antenna is completed.
Before the fixed-surface antenna is unfolded, the unfolding mechanism is fixed on the B antenna sub-module 12 and is fixedly connected with the satellite body, and explosion bolts are arranged at the connecting positions of the antenna sub-modules and serve as containing frames for limiting the movement of the antenna; in the process of unfolding the antenna, the explosive bolt is automatically broken, a motor of the folding and unfolding mechanism starts to operate, and the rotary butt joint between the antenna sub-modules is controlled; the steel wire rope is pulled through an unfolding mechanism arranged on the satellite body to assist the antenna sub-module 11A and the antenna sub-module 13C in rotating butt joint towards the antenna sub-module 12B; in order to ensure the overall shape surface precision of the antenna, locking mechanisms between the antenna sub-module 11A and the antenna sub-module 12B, and between the antenna sub-module 12B and the antenna sub-module 13C are locked after butt joint is completed, and the three groups of antenna sub-modules form an integral body to prepare for the second-stage unfolding; and the rotation, butt joint and unfolding of the antenna sub-modules are completed.
In the second step of unfolding, the small motor 4 starts to work, the motor pulley 5 is controlled to slowly tighten the rope 10 wound on each releasing mechanism and the pulley block 6 in the guide rail device 3, and then the surface unit 1 from top to bottom is unfolded along each releasing mechanism and the sliding groove 18 in the guide rail device 3; all the face units 1 and the release mechanism and the guide means 3 reach the established position and are locked by the motor pulley 5 according to the unfolding procedure described in claim 4; and completing the complete unfolding of the solid surface antenna.
The invention takes 3 antenna sub-modules and 5 segments of sub-reflecting surfaces as examples, and the number of the antenna sub-modules and the number of the sub-reflecting surfaces are not limited to the above according to the actual requirements, and the expansion principle of the invention is the same as that of each stage. In addition, the foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (7)
1. A two-dimensional unfolding mechanism based on a fixed-plane antenna is characterized by comprising three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms (7), four groups of folding unfolding mechanisms (2), a releasing mechanism and a guide rail device (3); the main part of each group of antenna reflecting surface sub-modules is five sections of same antenna surface units (1); the three groups of antenna reflecting surface sub-modules are arranged in a stacking mode and respectively comprise the following components from top to bottom: an A antenna sub-module (11), a B antenna sub-module (12) and a C antenna sub-module (13);
the antenna sub-module A (11), the antenna sub-module B (12) and the antenna sub-module C (13) are connected by four groups of folding and unfolding mechanisms (2); wherein two folding and unfolding mechanisms (2) are laid at the concave surface connecting part of the B antenna sub-module (12) and the C antenna sub-module (13); two folding and unfolding mechanisms (2) are laid at the convex surface connecting position of the antenna submodule A (11) and the antenna submodule B (12);
according to an XYZ axis coordinate system, the folding and unfolding mechanisms (2) at the joints are symmetrically distributed on the XZ plane of the coordinate system; b, the antenna sub-modules (12) are symmetrically distributed at two ends along the X-axis direction of the coordinate system, and five pairs of locking mechanisms (7) are laid in grooves at the two ends from top to bottom;
five groups of lock catches (8) from top to bottom are respectively arranged on one side of the A antenna sub-module (11) and the C antenna sub-module (13) close to the folding and unfolding mechanism (2), and the lock catches (8) are positioned on the middle vertical surface of each antenna surface unit (1), fixedly connected with the antenna surface units (1) and used for aligning and connecting the locking mechanisms (7);
five groups of releasing mechanisms, a guide rail device (3) and a group of motor pulleys (5) from top to bottom are respectively arranged on one side of the antenna sub-module A (11) and the antenna sub-module C (13) far away from the folding and unfolding mechanism (2), and a pulley block (6) is arranged on each motor pulley (5);
the antenna face unit (1) is internally free of connection, the position of the antenna face unit (1) is limited by a release mechanism and a guide rail device (3) which are fixedly connected to the side face of the antenna face unit (1) on an antenna submodule A (11) and an antenna submodule C (13), and the release mechanism and the guide rail device (3), a motor pulley (5) and a pulley block (6) control the locking and unfolding of the antenna face unit (1).
2. The two-dimensional unfolding mechanism based on the fixed-area antenna is characterized in that the folding and unfolding mechanism (2) consists of a rotating arm (14), a fixed arm (15), a large motor (9) and a rotating shaft (16);
a fixed arm (15) of the folding and unfolding mechanism (2) is fixedly connected with the surface of the B antenna sub-module (12), and a rotating arm (14) is fixedly connected with the surface of the A antenna sub-module (11) and the surface of the C antenna sub-module (13); the rotating arm (14) is hinged with the fixed arm (15) through a rotating shaft (16), and a driving device, namely a large motor (9), is arranged at the tail end of the rotating shaft (16); the folding and unfolding mechanism (2) is used for overturning and butting the antenna sub-modules, and a large motor (9) arranged on the folding and unfolding mechanism (2) plays a main overturning role.
3. The two-dimensional unfolding mechanism based on the fixed-surface antenna is characterized in that the release mechanism and the guide rail device (3) mainly comprise a support frame (17), a sliding groove (18), a small pulley (19), a positioning hole (20), a calibration key (21), a connecting hole (22) and a spring bolt (23);
the sliding chute (18) and the small pulley (19) are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame (17), and the pair of pulley blocks (6) are distributed on two sides in the supporting frame (17) and fixedly connected with the supporting frame (17); the square planes at the two ends of the supporting frame (17) are respectively provided with a positioning hole (20), a calibration key (21), a connecting hole (22) and a spring bolt (23) which are used for connecting the release mechanism and the guide rail device (3) after the antenna mechanism is unfolded; five groups of releasing mechanisms and guide rail devices (3) are stacked in sequence from top to bottom, and the internal connection mode of the releasing mechanisms and the guide rail devices is composed of five pulley blocks (6), a group of ropes (10) and a small motor (4); the small motor (4) is positioned on the bottom layer supporting frame (17) and is used for tightening the rope (10); the rope (10) is wound on the pulleys of the pulley blocks (6), the upper end of the rope (10) is fixed with the releasing mechanism on the top layer and the pulley of the guide rail device (3), the lower end of the rope (10) is wound on the motor pulley (5), and the winding and unwinding of the rope are controlled by the rotation of the small motor (4).
4. The two-dimensional unfolding mechanism based on the fixed-surface antenna is characterized in that the small motor (4) at the lower end of the release mechanism and guide rail device (3) tightens the rope (10) through rotation, so that the release mechanism and guide rail device (3) and the antenna surface unit (1) are pulled to slide along the sliding groove (18); the upper-end release mechanism and the guide rail device (3) and the antenna surface unit (1) slide to the critical position of the tail end of the sliding groove opening and continue to slide downwards along the plane vertical to the sliding groove (18) on the lower-end support frame (17); the pair of connecting holes (22) and the pair of calibration keys (21) are positioned on the vertical plane, and the connecting holes (22) and the calibration keys (21) are symmetrically distributed by taking the vertical plane of the vertical plane as a reference; a pair of connecting holes (22) and a pair of spring lock tongues (23) are distributed on the vertical plane at the starting end side of the sliding groove; the positioning holes (20) and the spring lock tongues (23) are symmetrically distributed by taking the vertical plane as a reference; after the release mechanism and the guide rail device (3) and the antenna surface unit (1) slide to a preset position, a pair of spring lock tongues (23) extend into corresponding connecting holes (22) and are locked, and at the moment, all the calibration keys (21) are positioned in corresponding positioning holes (20).
5. The unfolding method of the two-dimensional unfolding mechanism based on the solid-surface antenna as claimed in any one of claims 1 to 4, wherein the unfolding mode is step-by-step unfolding, and the unfolding process is divided into two steps: the first step is to realize the butt joint and the expansion among the sub-modules of the reflecting surface by the work of a folding and expanding mechanism (2), and the second step is to realize the sliding and the expansion of the tiled antenna surface units (1) by the work of a small motor (4) and a motor pulley (5); before the fixed-surface antenna is unfolded, the unfolding mechanism is fixed on an antenna sub-module (12) B and is fixedly connected with the satellite body, and explosion bolts are arranged at the connecting positions of the antenna sub-modules and are used as storage frames for limiting the movement of the antenna; in the process of unfolding the antenna, the explosive bolt is automatically broken, a motor of the folding and unfolding mechanism starts to operate, and the rotary butt joint between the antenna sub-modules is controlled; the unfolding mechanism arranged on the satellite body pulls the steel wire rope to assist the antenna sub-module A (11) and the antenna sub-module C (13) to be in rotary butt joint with the antenna sub-module B (12); in order to ensure the overall shape surface precision of the antenna, locking mechanisms positioned between an antenna sub-module A (11) and an antenna sub-module B (12) and between the antenna sub-module B (12) and an antenna sub-module C (13) are locked after butt joint is completed, and the three groups of antenna sub-modules form an integral body and prepare for the second-stage unfolding; the rotation, butt joint and expansion of the antenna sub-modules are completed;
in the second step of unfolding, the small motor (4) starts to work, the motor pulley (5) is controlled to slowly tighten the rope (10) wound on the pulley block (6) in each releasing mechanism and the guide rail device (3), and then the surface unit (1) from top to bottom is unfolded along the sliding groove (18) in each releasing mechanism and the guide rail device (3); all the surface units (1), the release mechanism and the guide rail device (3) reach the set positions and are locked by a motor pulley (5); and completing the complete unfolding of the solid surface antenna.
6. The unfolding method of the two-dimensional unfolding mechanism based on the solid-surface antenna as claimed in claim 5, wherein the first unfolding process specifically comprises the following steps:
when a large motor (9) drives an A antenna sub-module (11) and a C antenna sub-module (13) to be in rotary butt joint, namely all face units (1) of the A antenna sub-module (11) or the C antenna sub-module (13) are turned over along with each other, when an upper convex face top antenna face unit (1) of the A antenna sub-module (11) or the C antenna sub-module (13) is turned over to be parallel to and level with a top antenna face unit (1) of a B antenna sub-module (12), a lock catch (8) is connected with a locking mechanism (7), and at the moment, three face units (1) which are parallel and level with each layer form an antenna sub-reflecting face; spacing braking is carried out through installing the spacing bolt on the expansion frame in the expansion mechanism, so far accomplishes the upset action, and locking mechanical system (7) and hasp (8) locking: when the lock catches (8) fixed on the antenna sub-module A (11) and the antenna sub-module C (13) are respectively and rotationally butted to the lock shell positions of the locking mechanisms (7) on the two sides of the antenna sub-module B (12), the lock catches (8) extrude pressing blocks in the locking mechanisms (7) to enable the pressing blocks to move inwards to the lock catches to be in a pressing state, and the lock catches are locked by friction angles of lock tongues in the locking mechanisms (7) to the lock catches and extruded by the pressing blocks to the lock catches, so that the locking in six directions between the lock catches and the lock shells is realized, and the high-precision locking between the antenna reflecting surfaces is realized; after the A antenna sub-module (11), the B antenna sub-module (12) and the C antenna sub-module (13) are butted and locked, the antenna sub-reflecting surfaces need to be unfolded, at the moment, all the surface units are pulled out of the antenna sub-module unfolded in the first stage through the action of a small motor by the unfolding mechanism, and the releasing action of the antenna reflecting surfaces is completed to prepare for the unfolding of the antenna reflecting surfaces, namely the unfolding in the second step.
7. The unfolding method of the two-dimensional unfolding mechanism based on the fixed-surface antenna as claimed in claim 5, wherein the second unfolding process comprises the following specific steps:
the outer sides of the antenna submodule A (11) and the antenna submodule C (13) are respectively fixed with a guide rail device (3) so that the reflecting surfaces of the antennas can move relatively; after the antenna is unfolded at the first stage, the small motors (4) and the motor pulleys (5) at the lower ends of the two sides of the antenna respectively pull the ropes (10) at the two sides, and the guide rail devices start to move relatively under the traction driving action of the ropes, so that the reflecting surfaces of the antenna are driven to be unfolded synchronously; the unfolding speed of the antenna reflecting surface can be controlled by controlling the speed of the tensioning rope; when the antenna is unfolded to reach the set position, the locking device between every two sections of antenna sub-reflecting surfaces is locked, and in the second-stage unfolding process, the guide rail device (3) before being locked is buffered by the spring mechanism until the guide rail device stops, so that the whole process of unfolding the antenna is completed.
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| CN202210936741.5A CN115411486A (en) | 2022-08-05 | 2022-08-05 | Two-dimensional unfolding mechanism and method based on solid-surface antenna |
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| CN202210936741.5A CN115411486A (en) | 2022-08-05 | 2022-08-05 | Two-dimensional unfolding mechanism and method based on solid-surface antenna |
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| CN102983902A (en) * | 2012-11-30 | 2013-03-20 | 西安欧赛通信科技有限公司 | 1.2m feedback full-automatic portable emergency satellite communication antenna servo system |
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| US20180151938A1 (en) * | 2015-04-30 | 2018-05-31 | Vilnius University | Easyly deployable phased antenna for a spacecraft and system of such antennas |
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| CN102983902A (en) * | 2012-11-30 | 2013-03-20 | 西安欧赛通信科技有限公司 | 1.2m feedback full-automatic portable emergency satellite communication antenna servo system |
| US20180151938A1 (en) * | 2015-04-30 | 2018-05-31 | Vilnius University | Easyly deployable phased antenna for a spacecraft and system of such antennas |
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