A capture system and storage method for capturing and removing abandoned low-orbit satellites

Abstract

The present invention discloses a capture system and storage method for capturing and removing abandoned satellites in low-orbit. The capture system includes a net-umbrella mechanism, which includes a flexible net, a flexible umbrella, and a connecting assembly. The connecting assembly includes a second tether and multiple third tethers. The outer contour of the flexible net is connected to a plurality of mass blocks via first tethers, and each first tether is evenly spaced along the circumference of the flexible net. The first end of each third tether is connected to the outer contour of the flexible umbrella at equal intervals along the circumference, and the second end of each third tether is connected to the first end of the second tether, and the second end of the second tether is connected to the central node of the flexible net. The present invention is applied to the field of capturing and removing abandoned satellites in orbit. By increasing the resistance of abandoned satellites or large debris, the process of their deorbit is accelerated and they are burned up in the atmosphere after re-entering the atmosphere, thereby achieving the effect of capturing and removing abandoned satellites or large debris in orbit. The present invention has great application potential and development prospects in the field of capturing and removing abandoned satellites or large debris in orbit.

Description

Technical Field

[0001] The present invention relates to the technical field of on-orbit capture and removal of abandoned satellites, and in particular to a capture system and storage method for capturing and removing abandoned low-orbit satellites, which are suitable for capturing and removing abandoned low-orbit satellites. Background Art

[0002] Humanity's space exploration activities are primarily concentrated in low-Earth orbit (LEO), where the vast majority of spacecraft currently in orbit reside. Over time, an increasing number of spacecraft in orbit fail and become decommissioned. However, these decommissioned satellites still occupy valuable orbital resources and can collide with other spacecraft at high speeds, generating large amounts of debris and further deteriorating the space environment. Therefore, the capture and removal of decommissioned satellites and large debris in LEO is urgent.

[0003] Flexible net on-orbit capture technology uses a tugboat to launch and deploy a flexible net stored in a fixed-volume net compartment. The deployed flexible net has a large interception area. The flexible net is also porous, and by entwining and hooking with components such as satellite antennas and receivers, it improves the fault-tolerant capture capability of non-cooperative targets such as abandoned satellites and large debris. However, conventional flexible net on-orbit capture technology mostly captures non-cooperative targets such as abandoned satellites and large debris and then transfers them to an orbital transfer vehicle for unified processing. This results in a very limited number of non-cooperative targets that can be captured and removed, as well as a very limited efficiency. Summary of the Invention

[0004] In response to the problem of low efficiency in capturing and removing abandoned low-orbit satellites in the above-mentioned prior art, the present invention provides a capture system and storage method for capturing and removing abandoned low-orbit satellites, which is suitable for capturing and removing abandoned low-orbit satellites. A flexible net is used to perform fault-tolerant capture of abandoned satellites, and the atmospheric resistance of a flexible umbrella is used to achieve the purpose of quickly removing abandoned satellites. A foldable storage design is implemented based on a net-umbrella mechanism. The net-umbrella mechanism occupies a small volume after being stored, and can carry multiple payloads for multiple target capture and removal in one mission. The cost is low, and the system has great application potential and development prospects in the field of on-orbit capture and removal of abandoned satellites or large debris.

[0005] To achieve the above-mentioned object, the present invention provides a capture system for capturing and removing abandoned low-orbit satellites, comprising a net-umbrella mechanism, wherein the net-umbrella mechanism comprises a flexible net, a flexible umbrella, and a connecting assembly, wherein the connecting assembly comprises a second tether and a plurality of third tethers;

[0006] A plurality of mass blocks are connected to the outer contour of the flexible net via first tethers, and the first tethers are equally spaced along the circumference of the flexible net;

[0007] The first end of each third tether is connected to the outer contour of the flexible umbrella at equal intervals along the circumferential direction, the second end of each third tether is connected to the first end of the second tether, and the second end of the second tether is connected to the central node of the flexible net.

[0008] In one embodiment, the connection assembly further includes a rotational joint;

[0009] The first end of each of the third tethers is connected to the first end of the rotational joint, and the first end of the second tether is connected to the second end of the rotational joint.

[0010] In one embodiment, the connection assembly includes a support ring;

[0011] The position of each third tether close to the second end is fixedly connected to the support ring, and the connections between each third tether and the support ring are evenly spaced on the support ring.

[0012] In one embodiment, the flexible umbrella includes a membrane cloth, a first air bag and a gas generator;

[0013] The first airbag is an annular structure, and the first airbag is fixedly arranged on the outer contour of the membrane cloth, and the gas generator is arranged on the first airbag;

[0014] The first end of one of the third tethers is connected to the gas generator, and the first end of the remaining third tethers is connected to the outer contour of the first airbag or the membrane cloth.

[0015] In one embodiment, the flexible umbrella further includes a plurality of second air bags in a columnar structure;

[0016] Each of the second airbags is fixedly connected to the end surface of the membrane cloth, the first end of each of the second airbags is connected to the first airbag at equal intervals along the circumferential direction, and each of the second airbags is in communication with the first airbag;

[0017] The second ends of the second airbags converge and communicate at the center of the end surface of the membrane cloth.

[0018] In one embodiment, a capture system for capturing and removing a derelict satellite in low orbit further includes a launch mechanism;

[0019] The launching mechanism includes a base and a launching tube, wherein the launching tubes are multiple and correspond one to one with the mass blocks, and the first ends of the launching tubes are fixed on the base at equal intervals along the circumferential direction;

[0020] A powder charging chamber is provided inside the center of the base, and the powder charging chamber is connected to the first end of the launch tube through a guide channel;

[0021] After being folded and stored, the net-umbrella mechanism is arranged on the base and located between the launching tubes, and each mass block is embedded in the second end of the corresponding launching tube.

[0022] In one embodiment, the flexible net and the flexible umbrella are regular polygonal structures with the same number of sides.

[0023] To achieve the above purpose, the present invention also provides a method for storing the capture system for capturing and removing abandoned low-orbit satellites.

[0024] Step 1: fully unfold the flexible net and the flexible umbrella, then spread the flexible net flat over the flexible umbrella so that the flexible net and the flexible umbrella overlap, and pull the third tether to the periphery of the net-umbrella mechanism;

[0025] Step 2: Pull up the overlapping net-umbrella structure from the edge and hang it on the bracket in a bundle, wherein the flexible umbrella surface is on the outside and the flexible net is on the inside;

[0026] Step 3: Place the cabin directly below the net-umbrella mechanism, then place the first-layer storage sleeve in the center of the cabin, and use the support rod to press the center of the net-umbrella mechanism into the first-layer storage sleeve;

[0027] Step 4: Insert the next layer of storage sleeve from the bottom of the cabin into the upper layer of storage sleeve to form a storage cavity between the lower layer of storage sleeve and the upper layer of storage sleeve, and then use the support rod to press the subsequent part of the net-umbrella mechanism into the storage cavity;

[0028] Step 5: Repeat step 4 until the net-umbrella mechanism is completely stored in the cabin, and then pull the storage sleeves out from the bottom of the cabin in sequence. The stored flexible umbrellas act as an isolation structure for the flexible net, reducing contact, entanglement, penetration, and knotting between the flexible net wires.

[0029] Step 6: Store the third tether pulled to the periphery of the net-umbrella mechanism in an "S" shape into a tether storage bag, and then fix the tether storage bag on the inner wall of the cabin.

[0030] Compared with the prior art, the present invention has the following beneficial technical effects:

[0031] 1. This invention combines the fault-tolerant and reliable capture of abandoned satellites or large debris by a flexible net with the atmospheric drag of a flexible parachute. This can increase the drag on abandoned satellites or large debris, accelerate their orbital de-orbiting process, and re-enter the atmosphere to burn up, thereby achieving the capture and removal effect.

[0032] 2. The net-umbrella mechanism of the present invention occupies a small volume after being folded, and can carry multiple payloads in one mission to capture and remove multiple targets at a low cost. It has great application potential and development prospects in the field of on-orbit capture and removal of abandoned satellites or large debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0034] Figure 1 Schematic diagram of the structure of the capture system in Example 1 of the present invention;

[0035] Figure 2 Schematic diagram of the structure of the flexible net in Example 1 of the present invention;

[0036] Figure 3 This is a schematic structural diagram of a flexible umbrella in Example 1 of the present invention;

[0037] Figure 4 Schematic diagram of the structure of the launching mechanism in Example 2 of the present invention;

[0038] Figure 5 This is a flow chart of the storage method in Example 3 of the present invention;

[0039] Figure 6 This is a schematic diagram of the flat structure of the net-umbrella mechanism in Example 3 of the present invention;

[0040] Figure 7 This is a structural diagram of the net-umbrella mechanism suspension in Example 3 of the present invention;

[0041] Figure 8 This is a structural diagram of the net-umbrella mechanism in Example 3 of the present invention being pressed into the first-layer storage sleeve;

[0042] Figure 9 This is a structural diagram of the net-umbrella mechanism in Example 3 of the present invention being pressed into the next layer of storage sleeve;

[0043] Figure 10 This is a schematic diagram of the structure of the net-umbrella mechanism in Example 3 of the present invention, which is completely stored in the cabin;

[0044] Figure 11 This is a schematic diagram of the structure of the tether storage bag storing the third tether in Example 3 of the present invention;

[0045] Figure 12 This is a schematic structural diagram of a plurality of cabins assembled in Example 3 of the present invention;

[0046] Figure 13 This is a schematic diagram of the structure of the net-umbrella mechanism and the launching mechanism after assembly in Example 3 of the present invention.

[0047] Figure numbers: flexible net 1, first tether 101, mass block 102, flexible umbrella 2, membrane cloth 201, first airbag 202, gas generator 203, second airbag 204, second tether 301, third tether 302, rotating joint 303, support ring 304, base 4, charging chamber 401, diversion channel 402, launching tube 5, bracket 6, cabin 7, storage sleeve 8, support rod 9, tether storage bag 10.

[0048] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0052] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, physical connection, or wireless communication connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] Example 1

[0055] like Figure 1 The present embodiment shows a capture system for capturing and removing abandoned satellites in low-orbit orbit. The system primarily comprises a flexible net-umbrella mechanism, comprising a flexible net 1, a flexible umbrella 2, and a connecting assembly. The connecting assembly includes a second tether 301 and multiple third tethers 302. Several masses 102 are connected to the outer contour of the flexible net 1 via first tethers 101, with each first tether 101 distributed at equal intervals along the circumference of the flexible net 1. The first end of each third tether 302 is connected to the outer contour of the flexible umbrella 2 at equal intervals along the circumference of the flexible umbrella 2. The second end of each third tether 302 is connected to the first end of a second tether 301, and the second end of each second tether 301 is connected to the central node of the flexible net 1.

[0056] During the capture of abandoned satellites in low-orbit, the relatively dense atmosphere of the low-orbit region and the large envelope formed by the flexible umbrella 2 after deployment in space result in significant atmospheric drag in the low-orbit region due to the high surface-to-mass ratio of the flexible umbrella 2. Therefore, by combining the flexible net 1's reliable and fault-tolerant capture of abandoned satellites or large debris with the atmospheric drag of the flexible umbrella 2, the drag on the abandoned satellite or large debris can be increased, accelerating its orbital descent and causing it to re-enter the atmosphere and burn up, thereby achieving the capture and removal effect. Furthermore, the flexible net-umbrella mechanism is foldable and compact, and when folded, it can carry multiple net-umbrella payloads for multiple target capture and removal missions, effectively reducing costs. This mechanism has great application potential and development prospects in the field of on-orbit capture and removal of abandoned satellites or large debris.

[0057] In practical applications, the flexible net 1 and flexible umbrella 2 are regular polygons with equal sides. In this embodiment, an equilateral triangle is preferably used. Specifically, the first tether 101 is connected to the three corners of the flexible net 1, and the third tether 302 is connected to the three corners of the flexible umbrella 2. Of course, the flexible net 1 and flexible umbrella 2 may also be quadrilateral, hexagonal, or circular in shape, and their shapes can be adjusted according to actual needs.

[0058] refer to Figure 2The flexible net 1 in this embodiment is designed as a triangular porous net. The mass block 102 at the launch corner point pulls the flexible net 1 to unfold. After unfolding, the flexible net 1 collides and wraps the abandoned satellite. The mass block 102 cross-entangles the abandoned satellite under the action of collision. The flexible net 1 wraps and hooks the satellite antenna, receiver and other components. Under multiple actions, a fault-tolerant and reliable capture of the abandoned satellite is formed.

[0059] refer to Figure 3 The flexible umbrella 2 in this embodiment includes a membrane 201, a first airbag 202, and a gas generator 203. The first airbag 202 is an annular structure and is fixed to the outer contour of the membrane 201 by tying or gluing. The gas generator 203 is mounted on the first airbag 202, with the gas outlet of the gas generator 203 located within the first airbag 202. Among the multiple third tethers 302, the first end of one third tether 302 is connected to the gas generator 203 and its trigger switch, while the first ends of the remaining third tethers 302 are connected to the outer contour of the first airbag 202 or the membrane 201. The membrane 201 is made of a low-permeability film, which generates significant aerodynamic resistance when deployed. When the flexible net 1 flies out and captures the abandoned satellite, the flexible parachute 2 is pulled out under the traction of the second tether 301 and the third tether 302, and the gas generator 203 is triggered under the tension of one of the third tethers 302, thereby generating a large amount of gas and filling the first airbag 202, making the first airbag 202 have a certain rigidity, and at the same time driving the membrane cloth 201 to unfold, thereby increasing the resistance of the abandoned satellite or large debris, accelerating its orbit reduction process and re-entering the atmosphere to burn, thereby achieving the effect of capture and removal.

[0060] As a preferred embodiment, the flexible umbrella 2 also includes several columnar second airbags 204. Each second airbag 204 is fixedly attached to the end surface of the membrane 201 by tying or gluing. The first end of each second airbag 204 is connected to the first airbag 202 at equal intervals along the circumference of the first airbag 202. Each second airbag 204 is connected to the first airbag 202, and the second ends of each second airbag 204 converge and connect at the center of the end surface of the membrane 201. That is, when the gas generator 203 is triggered by the tension of the third tether 302, a large amount of gas is generated and fills the first and second airbags 202, 204, giving them a certain degree of rigidity and driving the membrane 201 to deploy. The second airbags 204 act as a skeleton in the flexible net 1, thereby enhancing the strength of the flexible net 1 after deployment.

[0061] In a preferred embodiment, the connection assembly further includes a rotational joint 303 and a support ring 304. The first end of each third tether 302 is connected to the first end of the rotational joint 303, and the first end of the second tether 301 is connected to the second end of the rotational joint 303. Furthermore, each third tether 302 is fixedly connected to the support ring 304 near its second end, and the connections between each third tether 302 and the support ring 304 are evenly spaced on the support ring 304. The support ring 304 supports the multiple third tethers 302 in their configuration and prevents them from becoming entangled, thereby ensuring that the flexible umbrella 2 maintains a stable deployed configuration and deployment area, maintaining a relatively large aerodynamic drag. Furthermore, the flexible umbrella 2 may rotate under the influence of aerodynamic drag. Therefore, the rotational joint 303 is provided at the confluence of the third tethers 302 to effectively prevent the tethers from twisting due to the rotation of the flexible umbrella 2.

[0062] Example 2

[0063] This embodiment discloses a capture system for capturing and removing abandoned low-orbit satellites, which mainly includes a flexible net-umbrella mechanism and a launch mechanism. The specific implementation of the net-umbrella mechanism is the same as that in Example 1, so it will not be described in detail in this embodiment.

[0064] refer to Figure 4 The launching mechanism in this embodiment includes a base 4 and launching tubes 5. There are multiple launching tubes 5, each corresponding to a mass 102 in the net-and-umbrella mechanism. The first end of each launching tube 5 is fixed to the base 4 at equal intervals along the circumference. A charge chamber 401 is located in the center of the base 4 and communicates with the first end of the launching tube 5 via a flow channel 402. When the net-and-umbrella mechanism is folded and stored, it is located on the base 4 between the launching tubes 5, with each mass 102 embedded in the second end of the corresponding launching tube 5.

[0065] The launch mechanism is primarily used to launch the flexible net 1 at a constant speed. During launch, the explosive charge detonates within the charge chamber 401, generating high-temperature, high-pressure gas. This high-pressure gas is transferred to the launch tube 5 through the flow channel 402 within the base 4, thereby providing initial kinetic energy to the mass 102 embedded in the second end of the launch tube 5. The distributed design of multiple launch tubes 5 effectively disperses recoil forces and ensures launch synchronization. Furthermore, the increased length of the launch tubes 5 and the installation of the base 4 reduce recoil forces on the mission platform.

[0066] Example 3

[0067] This embodiment discloses a storage method, which is mainly used to store the capture system for capturing and removing abandoned low-orbit satellites in embodiment 1 or embodiment 2. Figure 5 The storage method in this embodiment specifically includes the following steps:

[0068] Step 1: fully unfold the flexible net 1 and the flexible umbrella 2, then lay the flexible net 1 flat on the flexible umbrella 2 so that the flexible net 1 and the flexible umbrella 2 overlap, wherein the support ring 304 is placed in the center between the flexible net 1 and the flexible umbrella 2, the second tether 301 is folded in order and placed together with the rotating joint 303 in the support ring 304, and the third tether 302 is pulled to the periphery of the net-umbrella mechanism, that is, Figure 6 As shown;

[0069] Step 2: Pull up the overlapping net-umbrella structure from the edge and hang it in a bundle on the bracket 6, wherein the flexible umbrella 2 is on the outside and the flexible net 1 is on the inside. Figure 7 As shown;

[0070] Step 3: Place the cabin 7 directly below the net-umbrella mechanism, then place the first-layer storage sleeve 8 in the center of the cabin 7, and use the support rod 9 to press the center of the net-umbrella mechanism into the first-layer storage sleeve 8. Figure 8 As shown;

[0071] Step 4: Insert the next layer of storage sleeve 8, which is larger than the previous layer of storage sleeve 8, from the bottom of the cabin 7 into the previous layer of storage sleeve 8 and form a storage cavity between the storage sleeve 8 and the previous layer of storage sleeve 8. Then use the larger support rod 9 to press the subsequent part of the net-umbrella mechanism into the storage cavity. Figure 9 As shown;

[0072] Step 5: Repeat step 4 until all the net-umbrella mechanisms are stored in the cabin 7, and then pull out the storage sleeves 8 from the bottom of the cabin 7 in sequence. Figure 10 As shown; wherein, the retracted flexible umbrella 2 acts as an isolation structure for the flexible net 1, which can effectively reduce the contact, entanglement, penetration and knotting between the wires of the flexible net 1;

[0073] Step 6: After the net-umbrella mechanism is stored, the third tether 302 is still present at the corner of the flexible umbrella 2. The third tether 302 plays an important role in maintaining a stable configuration of the flexible umbrella 2. Therefore, the third tether 302 is stored separately. Specifically, a fence-shaped tether storage bag 10 is designed, and the third tether 302 pulled to the periphery of the net-umbrella mechanism is stored in the tether storage bag 10 in an "S" shape. The tether storage bag 10 is then fixed to the inner wall of the cabin 7. Figure 11 shown.

[0074] As a preferred embodiment, multiple triangular prism structure cabins 7 can be spliced together to accommodate multiple net-umbrella mechanisms. Figure 12 There is no wasted space between the triangular prism cabins 7, thereby effectively utilizing the mission platform space.

[0075] When the stored net-umbrella mechanism needs to be used, the launching mechanism is put into the cabin 7 from the bottom of the cabin 7, so that the net-umbrella mechanism is located on the base 4, and each launching tube 5 surrounds the net-umbrella mechanism, and then the mass block 102 is embedded in the top of the launching tube 5. Figure 13 During launch, the mission platform on the tugboat provides a detonation signal to the launch mechanism, which launches mass block 102 at a certain angle and speed. Mass block 102 pulls and deploys flexible net 1, gradually extending second and third tethers 301 and 302. After deployment, flexible net 1 wraps around the target over a large area, entangles and hooks the target satellite, and reliably captures the target. The relative motion between the mission platform and the target causes third tether 302 to be further extended. When third tether 302 is fully extended, the tension of third tether 302 triggers gas generator 203 on flexible parachute 2, causing the third parachute to be extended, inflated, and deployed. The third parachute, with its high surface-to-mass ratio, is subject to significant aerodynamic drag, which is transmitted to the captured target satellite via second and third tethers 301 and 302. This aerodynamic drag accelerates the target satellite's orbital descent, ultimately causing it to fall into the atmosphere and burn and be destroyed.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A capture system for capturing and removing abandoned low-orbit satellites, characterized in that: The invention comprises a net-umbrella mechanism, wherein the net-umbrella mechanism comprises a flexible net, a flexible umbrella and a connecting assembly, wherein the connecting assembly comprises a second tether and a plurality of third tethers; A plurality of mass blocks are connected to the outer contour of the flexible net via first tethers, and the first tethers are equally spaced along the circumference of the flexible net; The first end of each of the third tethers is connected to the outer contour of the flexible umbrella at equal intervals along the circumferential direction, the second end of each of the third tethers is connected to the first end of the second tether, and the second end of the second tether is connected to the central node of the flexible net; The flexible umbrella includes a membrane cloth, a first airbag and a gas generator; the first airbag is an annular structure, and the first airbag is fixed on the outer contour of the membrane cloth, and the gas generator is arranged on the first airbag; the first end of one of the third tethers is connected to the gas generator and connected to the trigger switch of the gas generator, and the first end of the remaining third tether is connected to the outer contour of the first airbag or the membrane cloth.

2. The capture system for capturing and removing abandoned low-orbit satellites according to claim 1, characterized in that: The connection assembly also includes a rotation joint; The second end of each of the third tethers is connected to the first end of the rotational joint, and the first end of the second tether is connected to the second end of the rotational joint.

3. The capture system for capturing and removing abandoned low-orbit satellites according to claim 1, characterized in that: The connection assembly includes a support ring; The position of each third tether close to the second end is fixedly connected to the support ring, and the connections between each third tether and the support ring are evenly spaced on the support ring.

4. The capture system for capturing and removing abandoned low-orbit satellites according to claim 1, 2 or 3, characterized in that: The flexible umbrella also includes a plurality of second air bags with columnar structures; Each of the second airbags is fixedly connected to the end surface of the membrane cloth, the first end of each of the second airbags is connected to the first airbag at equal intervals along the circumferential direction, and each of the second airbags is in communication with the first airbag; The second ends of the second airbags converge and communicate at the center of the end surface of the membrane cloth.

5. The capture system for capturing and removing abandoned low-orbit satellites according to claim 1, 2 or 3, characterized in that: Also includes the launching mechanism; The launching mechanism includes a base and a launching tube, wherein the launching tubes are multiple and correspond one to one with the mass blocks, and the first ends of the launching tubes are fixed on the base at equal intervals along the circumferential direction; A powder charging chamber is provided inside the center of the base, and the powder charging chamber is connected to the first end of the launch tube through a guide channel; After being folded and stored, the net-umbrella mechanism is arranged on the base and located between the launching tubes, and each mass block is embedded in the second end of the corresponding launching tube.

6. The capture system for capturing and removing abandoned low-orbit satellites according to claim 1, 2 or 3, characterized in that: The flexible net and the flexible umbrella are regular polygonal structures with the same number of sides.

7. A method for storing a capture system for capturing and removing abandoned low-orbit satellites according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: fully unfold the flexible net and the flexible umbrella, then spread the flexible net flat over the flexible umbrella so that the flexible net and the flexible umbrella overlap, and pull the third tether to the periphery of the net-umbrella mechanism; Step 2: Pull up the overlapping net-umbrella structure from the edge and hang it on the bracket in a bundle, wherein the flexible umbrella surface is on the outside and the flexible net is on the inside; Step 3: Place the cabin directly below the net-umbrella mechanism, then place the first-layer storage sleeve in the center of the cabin, and use the support rod to press the center of the net-umbrella mechanism into the first-layer storage sleeve; Step 4: Insert the next layer of storage sleeve from the bottom of the cabin into the upper layer of storage sleeve to form a storage cavity between the lower layer of storage sleeve and the upper layer of storage sleeve, and then use the support rod to press the subsequent part of the net-umbrella mechanism into the storage cavity; Step 5: Repeat step 4 until the net-umbrella mechanism is completely stored in the cabin, and then pull the storage sleeves out from the bottom of the cabin in sequence. The stored flexible umbrellas act as an isolation structure for the flexible net, reducing contact, entanglement, penetration, and knotting between the flexible net wires. Step 6: Store the third tether pulled to the periphery of the net-umbrella mechanism in an "S" shape into a tether storage bag, and then fix the tether storage bag on the inner wall of the cabin.

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