CN116135703B

CN116135703B - Passive closing-in structure of space flying net system

Info

Publication number: CN116135703B
Application number: CN202310425330.4A
Authority: CN
Inventors: 吴晨晨; 陈鹏旭; 张伟
Original assignee: Shenyang Institute of Automation of CAS
Current assignee: Shenyang Institute of Automation of CAS
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-06-16
Anticipated expiration: 2043-04-20
Also published as: CN116135703A

Abstract

The invention belongs to the field of space debris removal, and particularly relates to a passive closing-up structure of a space flying net system. According to the invention, the closing-up tether and the closing-up tether are matched to connect the ropes to form the pre-collision part which is used for collision between the flying net and the target to be captured, so that the passive closing-up work of the flying net can be realized; the invention is different from the previous motor-driven fly net closing-in structure, and because the passive closing-in structure has no control circuit and only consists of the fly net, the traction mass block connecting rope, the closing-in tether and the closing-in tether connecting rope, the invention is more suitable for space environment, simultaneously greatly simplifies the complexity of the space fly net system and reduces the volume and the quality of the space fly net system.

Description

Passive closing-in structure of space flying net system

Technical Field

The invention belongs to the field of space debris removal, and particularly relates to a passive closing structure of a space flying net system.

Background

An increasing number of space debris is a serious problem, such as catastrophic damage to a failed satellite upon collision with a spacecraft. At present, rockets are launched to space for more than 6000 times in various countries, the number of satellites sent into space is more than 10000, wherein about 6000 satellites are still in orbit, about 3000 satellites are still working, and a plurality of retired legacy satellites still run in orbit so far. Most of these satellites are distributed in the near-earth orbit, and the operating speed of the satellites is above 7 km/s. This high velocity impact can result in a large amount of small debris being generated by the impacting object, further exacerbating the space debris problem.

The space flying net system is a device for capturing large space fragments, and compared with other space fragment capturing modes, the space flying net has the following advantages: long capture distance, low precision requirement on navigation, low cost and wide application range. The capturing work executed by the space flying net system comprises the steps of unfolding, capturing, closing in, dragging off-track and the like, and particularly comprises the steps that a flying net launching mechanism launches a traction mass block, the traction mass block drives a net body to unfold in the flying process, and the net body completely covers a target and then closes in to finish capturing.

At present, two common closing schemes of the space flying net are realized by depending on a traction mass block, wherein one scheme is a coil spring arranged in the traction mass block, closing is performed by means of energy storage of the coil spring, and the other scheme is a motor, a wire-winding shaft and a power circuit arranged in the traction mass block, and the wire-winding shaft is driven by the motor to close. The effective capture distance and effective capture time of the flying mesh are greatly limited by the scheme of closing in by the coil springs. The scheme of built-in motor through the traction mass block is stable to use, and the disadvantage is that the built-in motor and the circuit can increase the volume of the traction mass block, thereby causing the overall volume increase. The traction mass block with the built-in motor circuit is in a severe space environment, and measures such as low temperature and radiation are needed to be taken, so that the cost is increased, and meanwhile, the small-size and light-weight requirements of the flying net system are not met by the large-size and high-quality traction mass block.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a passive closing structure of a space flying net system.

The aim of the invention is realized by the following technical scheme:

the passive closing-up structure of the space flying net system comprises a flying net, a traction mass block, traction mass block connecting ropes, closing-up tethers and closing-up tether connecting ropes, wherein the periphery of the flying net is provided with a plurality of traction mass blocks, each traction mass block is connected with the flying net through the traction mass block connecting ropes, a plurality of closing-up tethers are arranged on the flying net in a penetrating mode, the middle of each closing-up tether passes through the flying net towards one side of a target to be captured, the middle of each closing-up tether is connected with the middle of each adjacent closing-up tether through the closing-up tether connecting ropes, and the connected closing-up tethers and the closing-up tether connecting ropes jointly form a pre-collision part positioned on one side of the flying net towards the target to be captured;

when the flying net approaches and starts to capture the target to be captured, the target to be captured collides with the pre-collision part, at the moment, the center of the pre-collision part is at a certain interval with the center of the net body of the flying net, and the pre-collision part generates a speed difference relative to the traction mass block, so that the closing-in tether is driven to close.

The net body of the flying net is square, the number of the closing-up tethers is two, and the length of each closing-up tether is smaller than the linear length of the diagonal line of the net body of the flying net.

One of the closing-in tethers is Z-shaped and penetrates through the fly net, the other closing-in tethers is N-shaped and penetrates through the fly net, the projection shape of the middle part of one side of the fly net, facing to the target to be captured, of the two closing-in tethers in a plane parallel to the plane of the fly net body is X-shaped, and the pre-collision part is quadrilateral.

The periphery edge of the flying net is provided with a plurality of rope tying rings for penetrating the closing-in ropes.

Each tether loop is respectively arranged on the peripheral edge of the flying net near the joint of the traction mass block connecting rope and the flying net.

After closing, the center of the pre-collision part is contacted with the center of the net body of the flying net.

The invention has the advantages and positive effects that:

according to the invention, the closing-up tether and the closing-up tether are matched to connect the ropes to form the pre-collision part which is used for collision between the flying net and the target to be captured, so that the passive closing-up work of the flying net can be realized; the invention is different from the previous motor-driven fly net closing-in structure, and because the passive closing-in structure has no control circuit and only consists of the fly net, the traction mass block connecting rope, the closing-in tether and the closing-in tether connecting rope, the invention is more suitable for space environment, simultaneously greatly simplifies the complexity of the space fly net system and reduces the volume and the quality of the space fly net system.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of the working state of the present invention;

FIG. 3 is a second schematic view of the working state of the present invention.

In the figure: the device comprises a flying net 1, a traction mass block 2, a traction mass block connecting rope 3, a closing-up tether 4, a closing-up tether connecting rope 5, a tether ring 6 and a pre-collision part 100;

001 is the target to be captured.

Detailed Description

The invention is further described in detail below with reference to fig. 1-3.

The passive closing-up structure of the space flying net system comprises a flying net 1, a traction mass block 2, a traction mass block connecting rope 3, a closing-up tether 4 and a closing-up tether connecting rope 5 as shown in fig. 1-3. In this embodiment, the net body of the flying net 1 is square, the number of the closing-up tethers 4 is two, and the length of each closing-up tether 4 is smaller than the linear length of the diagonal line of the net body of the flying net 1.

Four traction mass blocks 2 are respectively arranged at four corners of the periphery of the flying net 1, and the four traction mass blocks 2 are all arranged. Each traction mass block 2 is connected with the flying net 1 through a traction mass block connecting rope 3, and the setting and connecting mode of the traction mass block connecting rope 3 adopts the prior art. Two closing-in tethers 4 are arranged on the flying net 1 in a penetrating way, the middle parts of the closing-in tethers 4 penetrate through the flying net 1 towards one side of the target 001 to be captured, the middle parts of the closing-in tethers 4 are connected with the middle parts of the adjacent closing-in tethers 4 through closing-in tether connecting ropes 5, and the closing-in tethers 4 and the closing-in tether connecting ropes 5 after connection form a pre-collision part 100 located on one side of the flying net 1 towards the target 001 to be captured. The closing-up tether 4 itself may be provided in a manner known in the art, depending on the different shape of the flying mesh 1.

The working state of the invention is seen in fig. 2 and 3. When the flying net 1 approaches to and starts capturing the target 001 to be captured, the target 001 to be captured collides with the pre-collision part 100, at this time, the center of the pre-collision part 100 is spaced from the center of the net body of the flying net 1, and the pre-collision part 100 generates a speed difference relative to the traction mass block 2, so as to drive the closing-in tether 4 to close. The setting of the interval ensures that the net mouth can be completely tightened after capturing, and the interval can be obtained according to simulation software in the prior art according to the size of the used flying net, the length of the closing-in tether, the applied gravity environment and the like. The center of the pre-collision part 100 contacts with the center of the net body of the flying net 1 after closing.

Specifically, in this embodiment, one of the closing-up tethers 4 is zigzag and is threaded on the flying mesh 1, the other closing-up tether 4 is N-shaped and is threaded on the flying mesh 1, the projection shape of the middle part of the side of the flying mesh 1 facing the target 001 to be captured, in the plane parallel to the plane of the mesh body of the flying mesh 1, of the two closing-up tethers 4 is X-shaped, and the pre-collision part 100 is quadrilateral, so that the pre-collision part 100 can more uniformly wrap the target 001 to be captured, and the contact area between the pre-collision part 100 and the capture target 001 is increased as much as possible.

Specifically, in this embodiment, four tether loops 6 for threading the closing-in tether 4 are provided on the outer peripheral edge of the flying net 1, and each tether loop 6 is respectively provided on the outer peripheral edge of the flying net 1 near the connection position of the traction mass block connecting rope 3 and the flying net 1, that is, on four corners of the net body of the flying net 1.

Working principle:

the pre-collision part 100 which is in front of the collision of the flying net 1 and the target 001 to be captured is formed by the matched closing-up tether 4 and the closing-up tether connecting rope 5, so that the passive closing-up work of the flying net 1 can be realized; the passive closing-in structure is different from the previous motor-driven flying net closing-in structure, and because the passive closing-in structure does not have a control circuit and only comprises the flying net 1, the traction mass block 2, the traction mass block connecting rope 3, the closing-in tether 4 and the closing-in tether connecting rope 5, the passive closing-in structure is more suitable for space environment, simultaneously greatly simplifies the complexity of a space flying net system and reduces the volume and the quality of the space flying net system.

Claims

1. A passive binding off structure of space flight net system, its characterized in that: the device comprises a flying net (1), a traction mass block (2), traction mass block connecting ropes (3), closing-up tethers (4) and closing-up tethers connecting ropes (5), wherein a plurality of traction mass blocks (2) are arranged on the periphery of the flying net (1), each traction mass block (2) is connected with the flying net (1) through the traction mass block connecting ropes (3), a plurality of closing-up tethers (4) penetrate through the flying net (1), the middle parts of the closing-up tethers (4) penetrate through the flying net (1) towards one side of a target to be captured, the middle parts of the closing-up tethers (4) are connected with the middle parts of adjacent closing-up tethers (4) through the closing-up tethers connecting ropes (5), and the connected closing-up tethers (4) and the closing-up tethers connecting ropes (5) jointly form a pre-collision part (100) located on one side of the flying net (1) towards the target to be captured;

when the flying net (1) approaches and starts to capture an object to be captured, the object to be captured collides with the pre-collision part (100), at this time, a certain interval is reserved between the center of the pre-collision part (100) and the center of the net body of the flying net (1), and the pre-collision part (100) generates a speed difference relative to the traction mass block (2), so that the closing-in tether (4) is driven to close.

2. A passive necking structure of a space flying net system in accordance with claim 1, wherein: the net body of the flying net (1) is square, the number of the closing-up tethers (4) is two, and the length of each closing-up tether (4) is smaller than the linear length of the diagonal line of the net body of the flying net (1).

3. A passive necking structure of a space flying net system in accordance with claim 2, wherein: one of the closing-in tethers (4) is Z-shaped and penetrates through the flying net (1), the other closing-in tethers (4) are N-shaped and penetrate through the flying net (1), the two closing-in tethers (4) are located at the middle of one side of the flying net (1) facing to a target to be captured, the projection shape of the middle of one side of the flying net (1) facing to the plane parallel to the plane where the net body of the flying net (1) is located is X-shaped, and the pre-collision part (100) is quadrilateral.

4. A passive necking structure of a space flying net system in accordance with claim 1, wherein: the periphery edge of the flying net (1) is provided with a plurality of rope tying rings (6) used for penetrating the closing-in ropes (4).

5. The passive necking structure of a space flying net system of claim 4, wherein: each tether ring (6) is respectively arranged on the peripheral edge of the flying net (1) close to the joint of the traction mass block connecting rope (3) and the flying net (1).

6. A passive necking structure of a space flying net system in accordance with claim 1, wherein: after closing, the center of the pre-collision part (100) is contacted with the center of the net body of the flying net (1).