CN111009714A - Satellite-borne umbrella-shaped antenna structure with self-unfolding speed regulating device and unfolding method thereof - Google Patents
Satellite-borne umbrella-shaped antenna structure with self-unfolding speed regulating device and unfolding method thereof Download PDFInfo
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- CN111009714A CN111009714A CN201911292227.7A CN201911292227A CN111009714A CN 111009714 A CN111009714 A CN 111009714A CN 201911292227 A CN201911292227 A CN 201911292227A CN 111009714 A CN111009714 A CN 111009714A
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- connecting rod
- steel wire
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- conical block
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
Abstract
The invention relates to the technical field of satellite deployable structures, in particular to a satellite-borne umbrella-shaped antenna structure with a self-deploying speed regulating device and a deploying method thereof. The device comprises a base, a reed, an antenna rib, a spring, a conical block, a mass block, a steel wire, a connecting rod, a support, a central shaft and the like; the base is hinged with the antenna rib through a reed, the top of the antenna rib is a rectangular cavity, a central shaft is fixed in one cavity, a spring is sleeved at the top of the central shaft, the bottom of the central shaft is connected with a conical block, the lower part of the conical block is symmetrically hinged with an upper connecting rod, a lower connecting rod is hinged with a support, the upper connecting rod and the lower connecting rod are hinged with a mass block, the support and the conical block are sleeved on the central shaft, and a steel wire is clamped between the wall of the cavity and the; the spring, the conical block, the mass block, the steel wire, the connecting rod, the support and the central shaft form a self-unfolding speed regulating device. According to the invention, the spiral spring-shaped steel wire is released, the antenna rib is opened at a constant speed, and then the whole antenna is unfolded. The device has the advantages of light structure, no need of power, self-regulation of speed, stability and reliability.
Description
Technical Field
The invention relates to the technical field of satellite deployable structures, in particular to a satellite-borne umbrella-shaped antenna structure with a self-deploying speed regulating device and a deploying method thereof.
Background
The expandable umbrella antenna is a compact satellite antenna, mainly composed of radial rigid rib, reflecting surface and feed source, and is named after its expansion and folding similar to the umbrella in daily life. In satellite application, the radial ribs are made into a certain curve shape, and the concave surfaces of the radial ribs are fixed by the reflecting net. Under the influence of shrinkage rate and caliber, when the reflecting net is not unfolded, the radial ribs are folded inwards, and when the reflecting net is unfolded, the radial ribs outwards support the reflecting net to form a reflecting surface. The deployable antenna has the advantages of small furled size, large unfolded size and high reliability, and is applied to various communication equipment such as satellites and radars.
The existing device can realize the expansion of the antenna, but generally needs external energy, a mechanism and the like, additionally increases the quality and the structural complexity of the satellite, causes the increase of the satellite transmitting cost and reduces the safety of in-orbit operation.
Therefore, how to design the self-unfolding speed regulation device of the satellite-borne umbrella-shaped antenna structure is a technical problem to be solved urgently.
Disclosure of Invention
In view of the above, the present invention provides an onboard umbrella-shaped antenna structure with a self-unfolding speed regulation device and a unfolding method thereof, which are used for solving the problem that the existing technology needs external energy and a mechanism to be opened, and fully utilizes the large deformation of a flexible structure and the mechanical energy conversion rule, so as to reduce the quality and complexity of the onboard antenna structure, realize self-unfolding, have light and handy structure, do not need power, have self-regulation of speed, and are stable and reliable.
In order to solve the problems in the prior art, the technical scheme of the invention is as follows: a satellite-borne umbrella-shaped antenna structure with a self-unfolding speed regulating device comprises a base and a plurality of antenna ribs with the same distance, wherein the lower ends of the antenna ribs are arranged on the circumference of the base; the method is characterized in that: the base is hinged with the antenna ribs through reeds, a cavity is formed in the top of each antenna rib, a self-unfolding speed regulating device is fixedly arranged in one cavity, and waist-shaped holes are formed in the left side and the right side of each cavity oppositely;
the structure of the self-unfolding speed regulating device comprises a spring, a conical block, a steel wire, a mass ball, an upper connecting rod, a lower connecting rod, a support and a central shaft;
the center pin sets firmly in the upper and lower both ends of cavity, and spring, tapered piece and support from the top down overlap in proper order and locate on the center pin, and the one end of spring is connected in the top of cavity, and the other end is connected with tapered piece, and the symmetry articulates between tapered piece and the support has last connecting rod and lower connecting rod, goes up connecting rod and lower connecting rod and drives tapered piece and support through the articulated upper and lower slip on the center pin of quality ball, and the steel wire is worn to locate annular in the waist type hole of every cavity, and the duplex winding is located the outside of tapered piece.
Furthermore, the upper connecting rod and the lower connecting rod are provided with two pairs and are symmetrically arranged, and the maximum rotating radius of the mass ball is smaller than the half side length of the cavity.
Furthermore, the upper connecting rod and the lower connecting rod are parallel to the central shaft when being vertical, the mass ball is not interfered with the central shaft, and the length of the connecting rod formed by the upper connecting rod and the lower connecting rod is less than the length of the lower section of the central shaft.
Further, the total length of the steel wire is slightly larger than the maximum caliber of the antenna when the antenna is unfolded.
A method for unfolding a satellite-borne umbrella-shaped antenna structure with a self-unfolding speed regulation device comprises the following steps:
when the self-unfolding speed regulating device is not unfolded, one end of the steel wire is fixed and wound in a waist-shaped hole of the self-unfolding speed regulating device to form a clockwork; the spring is in a compressed state, and the conical block compresses the free end of the steel wire; after the steel wire is released through the explosive bolt, the bent reed deforms at the root of the antenna rib to drive the antenna rib to unfold, the steel wire is loosened at the top of the antenna rib, at the moment, the steel wire drives the conical block to rotate around the central shaft, and the centripetal force of the circular motion of the mass ball hinged with the conical block and the connecting rod is as follows:
equal to the component k delta xsin theta of spring force, when the steel wire is released at a constant speed, the centripetal forceThe elastic force is unchanged, the friction force between the steel wire and the conical block is unchanged, namely the unfolding speed of the antenna rib is unchanged; if the steel wire loosening speed is increased, the rotating speed of the conical block is increased, the mass ball tends to move centrifugally, the included angle theta is increased, the rotating radius r is increased, the spring extends, at the moment, the conical block moves downwards, the positive pressure between the conical block and the steel wire is increased, the friction force is increased, and the steel wire loosening speed is reduced to maintain a constant speed.
Compared with the prior art, the invention has the following advantages:
1) the invention only adopts one steel wire, can realize the synchronous expansion of each antenna rib, the structure is light, the additional mass is very small;
2) the invention adopts the steel wire in the shape of a hairpin to restrain the antenna rib and self-expand, and does not need an additional power device;
3) the invention adopts the circular centrifugal motion of the mass ball to adjust the unfolding speed of the umbrella-shaped antenna and has the characteristic of self-adaption in the unfolding process;
4) in the space weightless environment, the mechanical energy conversion is realized completely by the interaction among the reed, the antenna rib, the spring, the conical block, the mass ball and the steel wire, and the space weightless environment has the advantage of high reliability;
5) the unfolding device of the satellite-borne umbrella-shaped antenna can overcome the defects of complex structure and high additional mass of the existing unfolding device of the umbrella-shaped antenna, has the advantages of ingenious and reliable structure and passive and controllable speed, and realizes the self-unfolding function of the satellite-borne umbrella-shaped antenna structure.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the spring-like wire of the present invention when unwound and unwound;
FIG. 3 is an expanded view of the present invention;
description of the labeling: 1-base, 2-reed, 3-antenna rib, 4-self-expanding speed regulating device, 5-spring, 6-conical block, 7-steel wire, 8-mass ball, 9-connecting rod, 10-support, 11-central shaft, 12-rectangular cavity and 13-explosion bolt;
9-1 upper connecting rod and 9-2 lower connecting rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment provides a satellite-borne umbrella-shaped antenna structure with a self-unfolding speed regulation device, which comprises a round cake- shaped base 1, 12 reeds 2, 12 antenna ribs 3, 1 self-unfolding speed regulation device 4 and 1 explosion bolt 13, as shown in fig. 1-3; the bottoms of the 12 antenna ribs 3 are uniformly distributed on the circumference of the base 1 and are hinged through reeds 2; the top of each antenna rib 3 is provided with a rectangular cavity 12, and a self-unfolding speed regulating device 4 is fixedly arranged in one cavity 12;
the self-unfolding speed regulating device 4 consists of a central shaft 11, a spring 5, a conical block 6, a steel wire 7, a mass ball 8, a connecting rod 9 and a support 10; the central shaft 11 is fixed at the upper end and the lower end of the cavity 12, the spring 5, the conical block 6 and the support 10 are sequentially sleeved on the central shaft 11 from top to bottom, the spring 5 is sleeved on the upper part of the central shaft 11 and is connected with the top of the cavity 12, and the bottom of the spring is connected with the conical block 6; the lower part of the conical block 6 is symmetrically hinged with a pair of connecting rods 9-1, a pair of lower connecting rods 9-2 is hinged on a support 10, two pairs of upper connecting rods 9-1 and lower connecting rods 9-2 are hinged with 2 pairs of mass balls 8, the upper connecting rods 9-1 and the lower connecting rods 9-2 drive the conical block 6 and the support 10 to slide up and down on a central shaft 11 through the hinging of the mass balls 8, the steel wire 7 penetrates through a waist-shaped hole of each cavity to form a ring and is wound on the outer side of the conical block 6, the steel wire 7 is clamped between the inner wall of the cavity 12 and the conical block 6, and the steel wire 7 is provided with an explosion bolt 12.
When the antenna rib 3 is not unfolded, the clockwork-shaped steel wire 7 winds the antenna rib 3, the balance is maintained by the static friction force between the inner wall of the cavity 11 and the conical block 6, and the total length of the steel wire 7 is slightly larger than the maximum caliber of the antenna when the antenna is unfolded; the mass balls 8 are symmetrically arranged, the mass is the same, the maximum rotation radius is smaller than the half length of the cavity 11, the connecting rod 9 is parallel to the central shaft 11, the mass balls 8 are not interfered with the central shaft 11, and the length of the connecting rod 9 is smaller than the length of the lower section of the central shaft 11.
In a preferred embodiment of the present invention, the spring plate 2 between the antenna rib 3 and the base 1 of the umbrella antenna is designed to have a variable cross-section shape by calculation, so that the bending and unfolding processes are smooth, and the cross section of the steel wire 7 is elliptical, thereby ensuring the curling and reducing the mutual collision force.
The invention relates to a method for unfolding a satellite-borne umbrella-shaped antenna structure with a self-unfolding speed regulation device, wherein one end of a steel wire 7 is fixed in a cavity 12, the rest parts are free, and when the steel wire is not unfolded, the steel wire is wound in a waist-shaped hole of the self-unfolding speed regulation device 4 and clamped by an explosion bolt 12, and the steel wire 7 stores elastic potential energy; the spring 5 is in a compressed state, and the conical block 6 compresses the free end of the steel wire 7;
after the steel wire 7 is released through the explosion bolt 13, the elastic potential energy stored in the reed 2 and the steel wire 7 starts to be converted into kinetic energy, the bent reed 2 deforms at the root of the antenna rib 3 to drive the antenna rib 3 to unfold, the steel wire 7 is loosened at the top of the antenna rib 3, at the moment, the steel wire 7 drives the conical block 6 to rotate around the central shaft 11, and the centripetal force of the circular motion of the mass ball 8 hinged with the conical block 6 and the connecting rod 9 is as follows:
m is the mass of the mass ball 8, r is the radius of rotation, v is the rotational speed, and ω is the rotational angular velocity; the centripetal force is equal to the component k delta xsin theta of the elastic force of the spring 5, k is the rigidity, delta x is the deformation, and theta is the included angle between the connecting rod 9 and the vertical direction; when the steel wire 7 is loosened at a constant speed, the centripetal force is unchanged, the spring maintains the original deformation, the elasticity is unchanged, the positive pressure of the conical block 6 on the steel wire 7 is unchanged, namely the friction force between the steel wire 7 and the conical block 6 is unchanged, the steel wire 7 maintains the constant speed, and the unfolding speed of the antenna rib 3 is unchanged; if the loosening speed of the steel wire 7 is increased, the rotating speed of the conical block 6 is increased, the mass ball 8 tends to move centrifugally, the included angle theta is increased, the rotating radius r is increased, the spring 5 is extended to press the conical block 6 to move downwards, the positive pressure between the conical block 6 and the steel wire 7 is increased, the friction force is increased, the conical surface linear speed of the conical block 6 is reduced in accordance with the loosening linear speed of the steel wire 7, and constant-speed unfolding is maintained.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and it should be noted that those skilled in the art should make modifications and variations without departing from the principle of the present invention.
Claims (5)
1. A satellite-borne umbrella-shaped antenna structure with a self-unfolding speed regulation device comprises a base (1) and a plurality of antenna ribs (3) with the same distance, wherein the lower ends of the antenna ribs are arranged on the circumference of the base (1); the method is characterized in that: the base (1) is hinged with the antenna ribs (3) through the reeds (2), the top of each antenna rib (3) is provided with a cavity (12), a self-expanding speed regulating device (4) is fixedly arranged in one cavity (12), and the left side and the right side of each cavity are oppositely provided with waist-shaped holes;
the self-unfolding speed regulating device (4) structurally comprises a spring (5), a conical block (6), a steel wire (7), a mass ball (8), an upper connecting rod (9-1), a lower connecting rod (9-2), a support (10) and a central shaft (11);
the central shaft (11) is fixedly arranged at the upper end and the lower end of the cavity (12), the spring (5), the conical block (6) and the support (10) are sequentially sleeved on the central shaft (11) from top to bottom, one end of the spring (5) is connected to the top of the cavity (12), the other end of the spring is connected with the conical block (6), an upper connecting rod (9-1) and a lower connecting rod (9-2) are symmetrically hinged between the conical block (6) and the support (10), the upper connecting rod (9-1) and the lower connecting rod (9-2) drive the conical block (6) and the support (10) to slide up and down on the central shaft (11) through a mass ball (8), and the steel wire (7) penetrates through a waist-shaped hole of each cavity to form a ring and winds around the outer side of the conical block (6).
2. The structure of the star-carried umbrella antenna with the self-spreading speed regulation device as claimed in claim 1, wherein: the upper connecting rod (9-1) and the lower connecting rod (9-2) are arranged in two pairs and are symmetrically arranged, and the maximum rotating radius of the mass ball (8) is smaller than the half length of the cavity (11).
3. The structure of the star-carried umbrella-shaped antenna with the self-spreading speed regulation device as claimed in claim 1 or 2, wherein: the upper connecting rod (9-1) and the lower connecting rod (9-2) are parallel to the central shaft (11) when being vertical, the mass ball (8) is not interfered with the central shaft (11), and the length of the connecting rod (9) formed by the upper connecting rod (9-1) and the lower connecting rod (9-2) is smaller than the length of the lower section of the central shaft (11).
4. The structure of claim 3, wherein the umbrella-type satellite-borne antenna structure with the self-unfolding speed regulation device is characterized in that: the total length of the steel wire (7) is slightly larger than the maximum caliber of the antenna when the antenna is unfolded.
5. The unfolding method of the satellite-borne umbrella-shaped antenna structure with the self-unfolding speed regulating device according to claim 1, characterized in that: the unfolding method comprises the following steps:
when the self-unfolding speed regulating device is not unfolded, one end of the steel wire (7) is fixed and wound in a waist-shaped hole of the self-unfolding speed regulating device (4) to form a clockwork; the spring (5) is in a compressed state, and the conical block (6) compresses the free end of the steel wire (7); after the steel wire (7) is released through the explosion bolt (13), the bent reed (2) deforms at the root of the antenna rib (3) to drive the antenna rib (3) to unfold, the steel wire (7) is loosened at the top of the antenna rib (3), at the moment, the steel wire (7) drives the conical block (6) to rotate around the central shaft (11), and the centripetal force of the circular motion of the mass ball (8) hinged with the conical block (6) and the connecting rod (9) is as follows:
the component k delta xsin theta equal to the elastic force of the spring (5) is that when the steel wire (7) is loosened at a constant speed, the centripetal force is constant, the elastic force is constant, the friction force between the steel wire (7) and the conical block (6) is constant, namely the unfolding speed of the antenna rib (3) is constant; if the loosening speed of the steel wire (7) is increased, the rotating speed of the conical block (6) is increased, the mass ball (8) tends to move centrifugally, the included angle theta is increased, the rotating radius r is increased, the spring (5) extends, at the moment, the conical block (6) moves downwards, the positive pressure between the conical block (6) and the steel wire (7) is increased, the friction force is increased, and the loosening speed of the steel wire (7) is reduced to maintain a constant speed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292227.7A CN111009714B (en) | 2019-12-12 | 2019-12-12 | Satellite-borne umbrella-shaped antenna structure with self-unfolding speed regulating device and unfolding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292227.7A CN111009714B (en) | 2019-12-12 | 2019-12-12 | Satellite-borne umbrella-shaped antenna structure with self-unfolding speed regulating device and unfolding method thereof |
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| CN111009714A true CN111009714A (en) | 2020-04-14 |
| CN111009714B CN111009714B (en) | 2021-11-23 |
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2019
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