CN115411486B - Two-dimensional unfolding mechanism and unfolding method based on fixed-surface antenna - Google Patents
Two-dimensional unfolding mechanism and unfolding method based on fixed-surface antenna Download PDFInfo
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- CN115411486B CN115411486B CN202210936741.5A CN202210936741A CN115411486B CN 115411486 B CN115411486 B CN 115411486B CN 202210936741 A CN202210936741 A CN 202210936741A CN 115411486 B CN115411486 B CN 115411486B
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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
- H01Q15/14—Reflecting surfaces; Equivalent structures
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Abstract
本发明公开了一种基于固面天线的二维展开机构及展开方法，属于展开机构技术领域，包括三组天线反射面子模块、五对锁紧机构、四组折叠展开机构、释放机构及导轨装置；每组天线反射面子模块包括五段天线面单元；其中天线面单元之间无连接关系，由固定在反射面侧面的导轨装置限定天线反射面的位置，直至第二步展开完成后才进行五个天线反射面的锁定。展开机构主要作用在第一部展开中，其与卫星本体相连接，第一步展开完成后，由空间机械臂将第一步展开完成后的天线组移动至待工作位，进而进行第二部展开。本发明实现了固面天线的二维展开，可以实现多组天线反射面同时翻转并锁定，满足整体天线反射面高精度性能要求。
The present invention discloses a two-dimensional deployment mechanism and deployment method based on a fixed surface antenna, which belongs to the technical field of deployment mechanism, and includes three groups of antenna reflection surface submodules, five pairs of locking mechanisms, four groups of folding and deployment mechanisms, a release mechanism and a guide rail device; each group of antenna reflection surface submodules includes five sections of antenna surface units; wherein there is no connection relationship between the antenna surface units, and the position of the antenna reflection surface is limited by the guide rail device fixed on the side of the reflection surface, and the five antenna reflection surfaces are not locked until the second step of deployment is completed. The deployment mechanism mainly acts in the first deployment, and it is connected to the satellite body. After the first step of deployment is completed, the space robot arm moves the antenna group after the first step of deployment to the waiting position, and then performs the second deployment. The present invention realizes the two-dimensional deployment of the fixed surface antenna, and can realize the simultaneous flipping and locking of multiple groups of antenna reflection surfaces, meeting the high-precision performance requirements of the overall antenna reflection 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 the inflatable antenna and the metal mesh antenna, the solid reflecting surface antenna is suitable for being applied to satellites with small caliber and high working frequency, and the profile precision of the solid reflecting surface antenna meets the high precision requirement. The solid-surface antenna has the advantages of high profile precision, 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 smaller volume in the transmitting stage, and needs to be unfolded into a larger unfolding area through an unfolding mechanism in the in-orbit operation, so that the unfolding mechanism of the fixed surface antenna is a key component for ensuring the normal operation of the satellite.
With the development of satellite technology, the application field of space antennas is increasingly wide, and the task complexity is gradually increased. The design of the satellite antenna is more focused on the design requirements of multiple frequency bands, high precision and large capacity, and the design of the satellite antenna gradually tends to be complex, but the antenna structure is required to be light in weight and small in size due to the limitations of rocket carrying capacity, economy and other factors. Based on the contradiction, the modularized and expandable antenna technology has been developed rapidly, and has become an important way for solving the requirements of large caliber, high precision, light weight and the like of satellite antennas.
At present, the fixed-surface antenna still belongs to the blank in the aspect of the unfolding mode, structure and mechanism, and the unfolding mode can realize simultaneous overturning and locking of multiple groups of antenna reflecting surfaces.
Disclosure of Invention
The invention solves the technical problems of overcoming the defects of the prior art, providing the unfolding mechanism for the parabolic cylinder solid surface antenna, realizing the two-dimensional unfolding of the solid surface antenna, realizing the simultaneous overturning and locking of multiple groups of antenna reflecting surfaces and meeting the high-precision performance requirement of the whole antenna reflecting surface.
The two-dimensional unfolding mechanism based on the fixed-surface antenna is characterized by comprising three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms, four groups of folding unfolding mechanisms, release mechanisms and guide rail devices, wherein the main body part of each group of antenna reflecting surface sub-modules is provided with five sections of identical antenna surface units.
The three groups of antenna reflecting surface sub-modules are respectively arranged in a stacking mode from top to bottom, wherein the antenna sub-modules A, the antenna sub-modules B and the antenna sub-modules C are respectively arranged in a stacking mode, the antenna sub-modules A, the antenna sub-modules B and the antenna sub-modules C are connected through four groups of folding and unfolding mechanisms, two folding and unfolding mechanisms are paved at the concave surface connection position of the antenna sub-modules B and the concave surface connection position of the antenna sub-modules C, two folding and unfolding mechanisms are paved at the convex surface connection position of the antenna sub-modules A and the antenna sub-modules B, the folding and unfolding mechanisms at all connection positions are symmetrically distributed on the left and right of an XZ plane of the coordinate system according to an XYZ axis coordinate system, the antenna sub-modules B are symmetrically distributed along the two ends of the X axis direction of the coordinate system, and five pairs of locking mechanisms are paved in grooves at the two ends from top to bottom.
The antenna A sub-module and the antenna C sub-module are respectively provided with five groups of locks from top to bottom at one side close to the folding and unfolding mechanism, the locks are positioned on the middle vertical surfaces of the antenna surface units and fixedly connected with the antenna surface units for aligning and connecting the locking mechanism, the antenna A sub-module and the antenna C sub-module are respectively provided with five groups of release mechanisms from top to bottom, a guide rail device and a group of motor pulleys at one side far away from the folding and unfolding mechanism, and the motor pulleys are provided with pulley blocks.
The antenna surface unit is characterized in that the interior of the antenna surface unit has no connection relationship, the release mechanism and the guide rail device which are fixedly connected to the side surface of the antenna surface unit on the antenna surface A sub-module and the antenna surface C sub-module limit the position of the antenna surface unit, and the release mechanism and the guide rail device, the motor pulley and the pulley block control the locking and the unfolding of the antenna surface unit.
The folding and unfolding mechanism comprises a rotating arm, a fixed arm, a large motor and a rotating shaft, wherein the fixed arm of the folding and unfolding mechanism is fixedly connected with the surface of the antenna submodule B, the rotating arm is fixedly connected with the surface of the antenna submodule A and the surface of the antenna submodule C, the rotating arm is hinged with the fixed arm through the rotating shaft, a driving device, namely the 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 submodules, and the large motor arranged on the folding and unfolding mechanism plays a main overturning role.
Further, the release mechanism and the guide rail device mainly comprise a supporting frame, a chute, a small pulley, a positioning hole, a calibration key, a connecting hole and a spring lock tongue;
The sliding chute and the small pulleys are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame, a pair of pulley blocks are distributed on two sides in the supporting frame and fixedly connected with the supporting frame, positioning holes, calibration keys, connecting holes and spring lock tongues are respectively arranged on square planes at two ends of the supporting frame and are used for connecting a release mechanism after the antenna mechanism is unfolded and a guide rail device, five groups of release mechanisms and guide rail devices are stacked from top to bottom in sequence, the internal connection mode of the five groups of release mechanisms and the guide rail devices comprises five pulley blocks, a group of ropes and a small motor, the small motor is positioned on the supporting frame at the bottom layer and is used for tightening the ropes, the ropes are wound on the pulleys of each pulley block, the upper ends of the ropes are fixed with the release mechanism at the top layer and the pulleys of the guide rail device, and the lower ends of the ropes are wound on the pulleys of the motor, and the winding and unwinding of the ropes are controlled through rotation of the small motor.
Further, the release mechanism and the small motor at the lower end of the guide rail device tighten the rope through rotation, so that the release mechanism, the guide rail device and the antenna surface unit are pulled to slide along the chute; the upper end release mechanism, the guide rail device and the antenna surface unit slide to the critical position of the opening end of the chute and continue to slide downwards along the plane vertical to the chute on the lower end support frame, a pair of connecting holes and a pair of calibration keys are positioned on the vertical plane, the connecting holes and the calibration keys are respectively and symmetrically distributed by taking the middle vertical plane of the vertical plane as a reference, a pair of connecting holes and a pair of spring bolts are respectively and symmetrically distributed on the vertical plane at the starting end side of the chute, the positioning holes and the spring bolts are respectively and symmetrically distributed by taking the middle vertical plane as a reference, and after the release mechanism, the guide rail device and the antenna surface unit slide to the set position, the pair of spring bolts extend into the corresponding connecting holes and are locked, and at the moment, the calibration keys are all positioned in the positioning holes corresponding to the connecting holes.
The invention also discloses a spreading method of the two-dimensional spreading mechanism based on the fixed-surface antenna, which is characterized in that the spreading mode is stepwise spreading, and the spreading process is divided into two steps, wherein the first step is to work through the folding spreading mechanism to realize the butt joint spreading among the reflecting surface sub-modules, and the second step is to work through a small motor and a motor pulley to realize the sliding spreading of the tiling of all the antenna surface units; before the fixed-surface antenna is unfolded, an unfolding mechanism is fixed on a B antenna sub-module and is fixedly connected with a satellite body, an explosion bolt is arranged at the joint between the antenna sub-modules and is used as a storage frame for limiting the movement of the antenna, in the process of unfolding the antenna, the explosion bolt is automatically exploded, a motor of the folding unfolding mechanism starts to operate to control the rotation butt joint between the antenna sub-modules, a steel wire rope is pulled by the unfolding mechanism arranged on the satellite body to assist the A antenna sub-module and the C antenna sub-module to rotate and butt joint towards the B antenna sub-module;
In the second step of unfolding, the small motor starts to work, the motor pulley is controlled to slowly tighten the ropes of the pulley blocks wound in the release mechanisms and the guide rail devices, so that the surface units from top to bottom are unfolded along the sliding grooves in the release mechanisms and the guide rail devices, all the surface units, the release mechanisms and the guide rail devices reach the preset positions and are locked through the motor pulley, and the complete unfolding of the fixed surface antenna is completed.
Further, the first step of unfolding process specifically comprises the following steps:
when the large motor drives the A antenna sub-module and the C antenna sub-module to rotate and butt joint, namely all the surface units of the A antenna sub-module or the C antenna sub-module are overturned along with each other, when the upper convex surface top antenna surface unit of the A antenna sub-module or the C antenna sub-module is overturned to a position flush with the top antenna surface unit of the B antenna sub-module, the lock catch is connected with the locking mechanism, at the moment, three flush surface units form an antenna sub-reflecting surface, limit braking is carried out through limit bolts arranged on an unfolding frame in the unfolding mechanism, overturning action is completed, the locking mechanism and the lock catch are locked, namely when the lock catch fixed on the A antenna sub-module and the C antenna sub-module is respectively rotated and butt-jointed to the lock shell positions of the locking mechanisms on two sides of the B antenna sub-module, the lock catch is extruded by the compression block in the locking mechanism, so that the compression block in the locking mechanism moves inwards to a compression state, and the friction angle locking of the lock catch by the lock catch in the locking mechanism and the compression block on the lock catch realize locking between six directions, so that the antenna reflecting surface is locked, the A antenna sub-module, the B antenna sub-module and the C antenna sub-module are locked, the antenna sub-module is locked, and the antenna sub-reflecting surface is unfolded, and the antenna sub-module is completely, and the antenna reflecting surface, and the antenna sub-reflecting surface is unfolded, and the antenna is completely, and the antenna is unfolded, and the antenna is completely.
Further, the second unfolding process specifically includes:
a antenna sub-module and C antenna sub-module are respectively fixed with a guide rail device at the outer sides so that each antenna reflecting surface can move relatively, a small motor and a motor pulley at the lower ends of two sides of an antenna respectively pull two side ropes after the first-stage unfolding, the guide rail devices start to move relatively under the traction driving action of the small motor and the motor pulley so as to drive the synchronous unfolding of the antenna reflecting surfaces, the unfolding speed of the antenna reflecting surfaces can be controlled by controlling the speed of tightening the ropes, when the unfolding reaches a set position, locking devices between every two sections of antenna sub-reflecting surfaces are locked, the locking devices consist of positioning holes, calibration keys, connecting holes and spring bolts, and in the second-stage unfolding process, the guide rail devices before locking are buffered until stopping through the spring mechanisms, so that the whole antenna unfolding process is completed.
Compared with the prior art, the invention has the beneficial effects that:
Because the solid-plane antenna has the characteristic of high rigidity, the solid-plane antenna design in the field of large-scale unfolding antennas is required to have the properties of light weight and large caliber. For the general unfolding mode of the existing solid-plane antenna, the large solid-plane 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 very great tests. The unfolding method aims at modularizing the large-caliber fixed-surface antenna, greatly reducing bending moment of the antenna reflecting surface in the unfolding process, well improving design space and safety margin under various indexes of the antenna, well ensuring reliability of the antenna, and simultaneously reducing cost and storage space required by antenna emission. In addition, compared with the light-weight design of the automatic unfolding of a common modularized antenna, the design of the two-dimensional unfolding mechanism ensures that the unfolded solid-surface antenna is detectable and controllable at any unfolding stage, can meet the use requirements of various carriers in various task environments, and obviously improves the success rate and reliability of the unfolding of the antenna.
Drawings
Fig. 1 is a schematic diagram of a parabolic cylinder antenna folding structure in the present invention;
FIG. 2 is a schematic diagram showing the completion of the first deployment step in the present invention;
FIG. 3 is a schematic diagram of a second deployment process according to the present invention;
FIG. 4 is a schematic diagram showing the completion of the second step of deployment in the present invention;
fig. 5 is a schematic view of the structure of the release mechanism and the rail device in the present invention.
The antenna comprises a 1-antenna surface unit, a 2-unfolding mechanism, a 3-release mechanism, a guide rail device, a 4-small motor, a 5-motor pulley, a 6-pulley block, a 7-locking mechanism, an 8-lock catch, a 9-large motor, a 10-rope, an 11-antenna sub-module, a 12-antenna sub-module, a 13-antenna sub-module, a 14-rotating arm, a 15-fixed arm, a 16-rotating shaft, a 17-supporting frame, a 18-sliding groove, a 19-small pulley, a 20-positioning hole, a 21-calibration key, a 22-connecting hole and a 23-spring lock tongue.
Detailed Description
The present invention will be described in further detail with reference to the following examples, for the purpose of making the objects, technical solutions, and effects of the present invention more apparent. It should be noted that the detailed description herein is for purposes of illustration only and is not intended to limit the invention.
As shown in FIG. 1, the mechanism of the invention comprises three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms 7, four groups of folding and unfolding mechanisms 2, a releasing mechanism and a guide rail device 3, wherein the main body part of each group of antenna reflecting surface sub-modules is provided with five sections of same antenna surface units 1, and the three groups of antenna reflecting surface sub-modules are respectively an A antenna sub-module 11, a B antenna sub-module 12 and a C antenna sub-module 13 from top to bottom in a stacking mode.
The antenna sub-module A11, the antenna sub-module B12 and the antenna sub-module C13 are connected by four groups of folding and unfolding mechanisms 2, wherein two folding and unfolding mechanisms 2;A are paved at the concave connection part of the antenna sub-module B12 and the antenna sub-module C13, and two folding and unfolding mechanisms 2 are paved at the convex connection part of the antenna sub-module 11 and the antenna sub-module B12.
According to the XYZ axis coordinate system, the folding and unfolding mechanisms 2 at the joints are symmetrically distributed on the left and right sides of the XZ plane of the coordinate system, the B antenna sub-module 12 is symmetrically distributed at two ends along the X axis direction of the coordinate system, five pairs of locking mechanisms 7;A are paved in grooves at two ends from top to bottom, the antenna sub-module 11 and the C antenna sub-module 13 are respectively provided with five groups of locks 8 from top to bottom at one side close to the folding and unfolding mechanisms 2, and the locks 8 are positioned on the central vertical surfaces of the antenna surface units 1 and fixedly connected with the antenna surface units 1 for aligning and connecting the locking mechanisms 7.
The antenna surface unit 1 is internally and connectionless, the position of the antenna surface unit 1 is limited by the release mechanism and the guide rail device 3 fixedly connected to the side surface of the antenna surface unit 1 on the antenna sub-module 11 and the antenna sub-module 13, and the locking and the unfolding of the antenna surface unit 1 are controlled by the release mechanism and the guide rail device 3, the motor pulley 5 and the pulley block 6.
The folding and unfolding mechanism 2 shown in fig. 2 consists of a rotating arm 14, a fixed arm 15, a large motor 9 and a rotating shaft 16, wherein the fixed arm 15 of the folding and unfolding mechanism 2 is fixedly connected with the surface of a B antenna sub-module 12, the rotating arm 14 is fixedly connected with the surface of an A antenna sub-module 11 and the surface of a C antenna sub-module 13, the rotating arm 14 is hinged with the fixed arm 15 through the rotating shaft 16, a driving device, namely the 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 between the antenna sub-modules, and the 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 the guide rail device 3 mainly comprise 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 lock tongue 23, wherein the sliding groove 18 and the small pulley 19 are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame 17, a pair of pulley blocks 6 are distributed on two sides in the supporting frame 17 and fixedly connected with the supporting frame 17, the positioning hole 20, the calibration key 21, the connecting hole 22 and the spring lock tongue 23 are respectively arranged on square planes at two ends of the supporting frame 17 and are used for connecting the release mechanism and the guide rail device 3 after the antenna mechanism is unfolded, five groups of release mechanisms and the guide rail device 3 are sequentially stacked from top to bottom, the internal connection mode of the five groups of the release mechanisms and the guide rail device 3 comprises five pulley blocks 6, a group of ropes 10 and one small motor 4, the small motor 4 is arranged on the supporting frame 17 at the bottom layer and used for tightening the ropes 10, the ropes 10 are wound on pulleys of the pulley blocks 6, the upper ends of the ropes 10 are fixedly connected with the release mechanism at the top layer and the pulleys of the guide rail device 3, the lower ends of the ropes 10 are wound on the pulleys 5, and the winding and unwinding of the ropes are controlled by the rotation of the small motor 4.
The small motor 4 at the lower end of the release mechanism and the guide rail device 3 rotates to tighten the rope 10, so that the release mechanism and the guide rail device 3 and the antenna surface unit 1 slide along the chute 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 opening end of the chute and continue to slide downwards along the plane perpendicular to the chute 18 on the lower end supporting frame 17, the pair of connecting holes 22 and the pair of calibration keys 21 are positioned on the vertical plane, the connecting holes 22 and the calibration keys 21 are symmetrically distributed by taking the middle vertical plane of the vertical plane as a reference, the pair of connecting holes 22 and the pair of spring bolts 23 are distributed on the vertical plane at the beginning end side of the chute, the positioning holes 20 and the spring bolts 23 are symmetrically distributed by taking the middle vertical plane as a reference, and after the release mechanism and the guide rail device 3 and the antenna surface unit 1 slide to the set position, the pair of spring bolts 23 extend into the corresponding connecting holes 22 and are locked, and the calibration keys 21 are positioned in the positioning holes 20 corresponding to the calibration keys 21.
As shown in fig. 3-4, the unfolding mode is stepwise unfolding, and the unfolding process is divided into two steps, wherein the first step is to work through a folding and unfolding mechanism 2 to realize butt joint unfolding among the reflecting surface sub-modules, and the second step is to work through a small motor 4 and a motor pulley 5 to realize sliding unfolding of all the antenna surface units 1 in a tiled mode.
The first step of unfolding process comprises the steps that when a large motor 9 drives an A antenna sub-module 11 and a C antenna sub-module 13 to rotationally butt joint, namely all surface units 1 of the A antenna sub-module 11 or the C antenna sub-module 13 are overturned along with each other, when the upper convex top antenna surface unit 1 of the A antenna sub-module 11 or the C antenna sub-module 13 is overturned to a position flush with the top antenna surface unit 1 of the B antenna sub-module 12, a lock catch 8 is connected with a locking mechanism 7, at the moment, three flush surface units 1 form an antenna sub-reflecting surface, limit braking is carried out through limit bolts arranged on an unfolding frame in the unfolding mechanism, overturning action is completed, the locking mechanism 7 and the lock catch 8 are locked, namely, when the lock catches 8 fixed on the A antenna sub-module 11 and the C antenna sub-module 13 are respectively rotationally butted to lock shell positions of the locking mechanisms 7 on two sides of the B antenna sub-module 12, the lock catches 8 squeeze compression blocks in the locking mechanism 7, friction angle locking of lock catches 8 in the lock catches and compression blocks in the lock catches are pushed to achieve six directions between the lock catches and the lock catches, and the reflecting surface of the antenna sub-module is achieved, and the antenna sub-module 11 is completely unfolded from the first step of unfolding process is completed, and the antenna sub-module 11 is completely unfolded, namely, after the antenna sub-module is unfolded from the first step of the reflecting surface is completely, and the antenna sub-module is completely unfolded, and the reflecting surface is completely unfolded, and the antenna is completely locked, and the reflecting from the second step of the reflecting surface is completely, and the reflecting surface is completely opposite to the reflecting surface, and the antenna is completely opposite.
The second unfolding process comprises the steps that the outer sides of an antenna sub-module 11 and an antenna sub-module 13 are respectively fixed with a guide rail device 3 so that each antenna reflecting surface can move relatively, as shown in fig. 3, a small motor 4 and a motor pulley 5 at the lower ends of two sides of an antenna after the first-stage unfolding process respectively pull two side ropes 10, the guide rail devices start to move relatively under the traction driving effect of the motor pulleys so as to drive the antenna reflecting surfaces to unfold synchronously, the unfolding speed of the antenna reflecting surfaces can be controlled by controlling the speed of tightening the ropes, when the unfolding reaches a set position, a locking device between every two sections of antenna sub-reflecting surfaces is locked, and in the second-stage unfolding process, the guide rail devices 3 before locking are buffered until stopping through a spring mechanism, so that the whole antenna unfolding process is completed.
Before the fixed-surface antenna is unfolded, an unfolding mechanism is fixed on the antenna sub-module 12 and is fixedly connected with the satellite body, explosion bolts are arranged at the connection positions among the antenna sub-modules to serve as storage frames for limiting the movement of the antenna, in the antenna unfolding process, the explosion bolts are automatically exploded, a motor of the folding unfolding mechanism starts to operate to control the rotation butt joint among the antenna sub-modules, a steel wire rope is pulled by the unfolding mechanism arranged on the satellite body to assist the antenna sub-modules 11 and 13 to rotate and butt joint towards the antenna sub-module 12, in order to ensure the overall surface accuracy of the antenna, a locking mechanism between the antenna sub-modules 11 and 12 and a locking mechanism between the antenna sub-modules 12 and 13 form a whole after the butt joint are completed, the antenna sub-modules are ready for the second-stage unfolding, and the rotation butt joint unfolding among the antenna sub-modules is 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 release mechanism and the guide rail device 3, so that the surface unit 1 from top to bottom is unfolded along the sliding groove 18 in each release mechanism and the guide rail device 3, all the surface units 1 and the release mechanisms and the guide rail devices 3 reach the set positions according to the unfolding steps described in the invention and are locked by the motor pulley 5, and the complete unfolding of the fixed surface antenna is completed.
In the invention, 3 antenna sub-modules and 5 sections of sub-reflecting surfaces are taken 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 practical requirements, and the unfolding principle is the same as that of each stage of the invention. In addition, the foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which is also to be considered as the scope of the present invention.
Claims (4)
1. The two-dimensional unfolding mechanism based on the fixed-surface antenna is characterized by comprising three groups of antenna reflecting surface sub-modules, five pairs of locking mechanisms (7), four groups of folding and unfolding mechanisms (2), a release mechanism and a guide rail device (3), wherein the main body part of each group of antenna reflecting surface sub-modules is provided with five sections of same antenna surface units (1);
The three groups of antenna reflecting surface sub-modules are arranged in a stacking mode, and are respectively an antenna sub-module A (11), an antenna sub-module B (12) and an antenna sub-module C (13) from top to bottom;
The antenna system comprises an antenna sub-module A (11), an antenna sub-module B (12) and an antenna sub-module C (13) which are connected by four groups of folding and unfolding mechanisms (2), wherein two folding and unfolding mechanisms (2) are paved at the concave surface connection part of the antenna sub-module B (12) and the antenna sub-module C (13), and two folding and unfolding mechanisms (2) are paved at the convex surface connection part of the antenna sub-module A (11) and the antenna sub-module B (12);
according to the XYZ axis coordinate system, the folding and unfolding mechanisms (2) at each joint are symmetrically distributed on the XZ plane of the coordinate system, the B antenna sub-modules (12) are symmetrically distributed along the two ends of the X axis direction of the coordinate system, and five pairs of locking mechanisms (7) are paved in grooves at the two ends from top to bottom;
The antenna sub-module A (11) and the antenna sub-module C (13) are respectively provided with five groups of lock catches (8) from top to bottom at one side 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) and fixedly connected with the antenna surface units (1) for aligning and connecting the locking mechanism (7);
the antenna A sub-module (11) and the antenna C sub-module (13) are respectively provided with five groups of release mechanisms, a guide rail device (3) and a group of motor pulleys (5) from top to bottom at one side far away from the folding and unfolding mechanism (2), and pulley blocks (6) are arranged on the motor pulleys (5);
the antenna surface unit (1) is internally and has no connection relation, the release mechanism and the guide rail device (3) fixedly connected on the side surface of the antenna surface unit (1) on the antenna sub-module A (11) and the antenna sub-module C (13) limit the position of the antenna surface unit (1), and the release mechanism and the guide rail device (3), the motor pulley (5) and the pulley block (6) control the locking and the unfolding of the antenna surface unit (1);
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);
The antenna comprises a fixed arm (15) of a folding and unfolding mechanism (2) and a rotating arm (14), wherein the fixed arm (15) is fixedly connected with the surface of a B antenna sub-module (12), the rotating arm (14) is fixedly connected with the surface of an A antenna sub-module (11) and the surface of a 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 release mechanism and the guide rail device (3) mainly comprise a support frame (17), a chute (18), a small pulley (19), a positioning hole (20), a calibration key (21), a connecting hole (22) and a spring lock tongue (23);
The device comprises a supporting frame (17), a sliding groove (18) and a small pulley (19), wherein the sliding groove (18) and the small pulley are respectively arranged on the upper convex surface and the lower concave surface of the supporting frame (17), a pair of pulley blocks (6) are distributed on two sides in the supporting frame (17) and fixedly connected with the supporting frame (17), positioning holes (20), a calibration key (21), a connecting hole (22) and a spring lock tongue (23) are respectively arranged on square planes at two ends of the supporting frame (17) and are used for connecting a release mechanism of an antenna mechanism after the antenna mechanism is unfolded and a guide rail device (3), five groups of release mechanisms and the guide rail device (3) are stacked from top to bottom in sequence, the internal connection mode of the five groups of release mechanisms and the guide rail device (3) 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 supporting frame (17) and used for tightening the ropes (10), the upper ends of the ropes (10) are fixed with pulleys of the top layer release mechanism and the guide rail device (3), the lower ends of the ropes (10) are wound on the motor pulley (5), and the lower ends of the ropes (10) are controlled to be wound on the pulleys (5) through rotation of the small motor (4).
The small motor (4) at the lower end of the release mechanism and the guide rail device (3) pulls the release mechanism and the guide rail device (3) and the antenna surface unit (1) to slide along the sliding groove (18) through rotating the tightening rope (10), the upper end release mechanism and the guide rail device (3) and the antenna surface unit (1) slide to the critical position of the opening tail end of the sliding groove, the release mechanism and the guide rail device (3) and the antenna surface unit (1) slide downwards along the plane perpendicular to the sliding groove (18) on the lower end supporting frame (17), a pair of connecting holes (22) and a pair of calibration keys (21) are positioned on the perpendicular plane, the connecting holes (22) and the calibration keys (21) are symmetrically distributed by taking the perpendicular plane of the perpendicular plane as a reference, a pair of connecting holes (22) and a pair of spring bolts (23) are distributed on the perpendicular 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 perpendicular plane as the reference, and the release mechanism and the guide rail device (3) and the antenna surface unit (1) slide to the determined position at the moment, and the pair of springs (23) extend into the corresponding connecting holes (22) and are locked and correspond to the positioning keys (20).
2. The unfolding method of the two-dimensional unfolding mechanism based on the fixed-surface antenna is characterized in that the unfolding mode is stepwise unfolding, the unfolding process is divided into two steps, wherein the first step is to work through a folding unfolding mechanism (2) to realize the butt joint and unfolding between the reflecting surface sub-modules, the second step is to work through a small motor (4) and a motor pulley (5) to realize the sliding unfolding of all antenna surface units (1), before the fixed-surface antenna is unfolded, the unfolding mechanism is fixed on a B antenna sub-module (12) and fixedly connected with a satellite body, an explosion bolt is arranged at the joint between the antenna sub-modules as a storage frame for limiting the movement of the antenna, and in the antenna unfolding process, a motor of the folding unfolding mechanism starts to operate to control the rotary butt joint between the antenna sub-modules, and the auxiliary A antenna sub-module (11) and a C antenna sub-module (13) are rotatably butted to the B antenna sub-module (12) through the unfolding mechanism arranged on the satellite body;
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 release mechanism and the guide rail device (3), so that the surface units (1) from top to bottom are unfolded along the sliding grooves (18) in each release mechanism and the guide rail device (3), all the surface units (1) reach the preset positions with the release mechanisms and the guide rail device (3) and are locked through the motor pulley (5), and the complete unfolding of the fixed surface antenna is completed.
3. The method for unfolding the two-dimensional unfolding mechanism based on the fixed-surface antenna according to claim 2, wherein the first unfolding process is specifically:
When the large motor (9) drives the A antenna sub-module (11) and the C antenna sub-module (13) to rotate and butt joint, namely all the surface units (1) of the A antenna sub-module (11) or the C antenna sub-module (13) are overturned along with each other, when the upper convex surface top antenna surface unit (1) of the A antenna sub-module (11) or the C antenna sub-module (13) is overturned to a position flush with the top antenna surface unit (1) of the B antenna sub-module (12), the lock catch (8) is connected with the locking mechanism (7), and at the moment, three surface units (1) flush at each layer form an antenna sub-reflecting surface; the locking mechanism (7) is locked with the lock catch (8) through limit braking by a limit bolt arranged on an unfolding frame in the unfolding mechanism, when the lock catches (8) fixed on the antenna sub-module A (11) and the antenna sub-module C (13) are respectively rotated and butted to the lock shell positions of the locking mechanisms (7) at the two sides of the antenna sub-module B (12), the lock catches (8) squeeze the compression blocks in the locking mechanism (7) to enable the compression blocks to move inwards to the lock catches to be in a compression state, six-direction locking between the lock catches and the lock shell is realized through friction angle locking of the lock catches by the lock catches in the locking mechanism (7) and compression of the lock catches by the compression blocks, and high-precision locking between antenna reflecting surfaces is realized, wherein the antenna sub-module A (11), the antenna sub-module B (12), after the butt joint and locking of the antenna sub-module (13) are finished, the antenna sub-reflecting surface needs to be unfolded, at the moment, the unfolding mechanism pulls all the surface units out of the antenna sub-module unfolded at the first stage through the action of the small motor, and the release action of the antenna reflecting surface is finished to be ready for unfolding the antenna reflecting surface, namely, the second-step unfolding.
4. The method for unfolding the two-dimensional unfolding mechanism based on the fixed-surface antenna according to claim 2, wherein the second unfolding process is specifically:
a antenna sub-module (11) and a C antenna sub-module (13) are respectively fixed with a guide rail device (3) at the outer sides so that each antenna reflecting surface can move relatively, a small motor (4) and a motor pulley (5) at the lower ends of two sides of the antenna after the first-stage unfolding respectively pull two side ropes (10), the guide rail devices start to move relatively under the traction driving action of the small motors and the motor pulleys, further the synchronous unfolding of the antenna reflecting surfaces is driven, the unfolding speed of the antenna reflecting surfaces can be controlled by controlling the speed of tightening the ropes, when the unfolding reaches a set position, a locking device between every two sections of antenna sub-reflecting surfaces is locked, and in the second-stage unfolding process, the guide rail devices (3) before locking are buffered until stopping through a spring mechanism, so that the whole antenna unfolding process is completed.
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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 |
| CN108011174A (en) * | 2017-11-27 | 2018-05-08 | 上海卫星装备研究所 | A kind of sliding method of deploying and system suitable for the large-scale solid surface antenna in space |
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| CN109638405B (en) * | 2018-12-03 | 2020-07-17 | 南京航空航天大学 | High-precision multi-docking locking surface antenna auxiliary deployment mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN108011174A (en) * | 2017-11-27 | 2018-05-08 | 上海卫星装备研究所 | A kind of sliding method of deploying and system suitable for the large-scale solid surface antenna in space |
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