Pneumatic reducer target protection and two-stage deployment reduction device and method

Abstract

This application relates to an inflatable decelerator target protection and two-stage deployment deceleration device and method. The device includes a decelerator, which is an inverted conical cavity structure. An instrument compartment is disposed at the center of the inner surface of the inverted cone. Several petal-shaped sections are arranged around the maximum diameter end of the inverted cone. Both the decelerator and the petal-shaped sections are inflatable. One end of each petal-shaped section is hinged to the maximum diameter end, and the other end is a free end with a radial travel stroke around the hinged end. The instrument compartment houses a capture component, a control component, and a deflation / inflation component. The control component is electrically connected to both the capture component and the deflation / inflation component to control the capture component to capture the target and to control the deflation / inflation component to inflate or deflate the decelerator and the petal-shaped sections. This deceleration device achieves two-stage deceleration and, by adjusting the deployment angle of the petal-shaped sections in conjunction with their inflation pressure, changes the turning angle of the rotation speed device, thereby adjusting the flight attitude.

Description

Technical Field

[0001] This application relates to the field of spacecraft recovery technology, and in particular to an inflatable decelerator target protection and two-stage deployment deceleration device and method. Background Technology

[0002] Spacecraft recovery refers to the process of recovering and reusing spacecraft or their components that have been used in space. The main purpose of spacecraft recovery is to reduce the amount of space debris and decrease pollution of the space environment; it can also save costs, as reusing existing spacecraft or components is more economical and efficient than building entirely new spacecraft.

[0003] An inflatable aerodynamic decelerator (IAD) is an attached decelerator primarily used for capturing high-value targets in space and recovering space debris. Its key features include a smaller overall mass and higher deceleration efficiency at hypersonic speeds. The flexible gasbag is inflated and deployed using a high-pressure nitrogen cylinder, and a specially designed buffer chamber provides a cushioning effect during landing.

[0004] Currently, there are three main configurations of inflatable pneumatic decelerators. The first type is the stacked ring inflatable deployable decelerator designed in the United States, also known as the attached inflatable decelerator (AID). This refers to a flexible inflatable deployable structure composed of a series of inflatable rings of different diameters forming an inverted cone shape. The second type is the tension cone atmospheric entry capsule membrane decelerator (MAAC) developed by Japan. This is a single inflatable ring membrane type decelerator mainly composed of inflatable rings and flexible membranes. The attitude control method of the above decelerators mostly adopts the method of controlling the center of mass of the control device to control the attitude of the aircraft. At the same time, none of the above inflatable deceleration schemes have considered the protection of the recovery target. Summary of the Invention

[0005] Therefore, it is necessary to address the aforementioned issue of not considering the protection of the recovery target by providing an inflatable decelerator target protection and secondary deployment deceleration device and method that can both protect the recovery target and achieve secondary deployment deceleration and flight attitude adjustment.

[0006] A pneumatic decelerator target protection and two-stage deployment deceleration device includes a decelerator, which has an inverted conical cavity structure. An instrument compartment is disposed at the center of the inner surface of the inverted conical cavity. Several petal-shaped parts are arranged around the maximum diameter end of the inverted conical cavity. Both the decelerator and the petal-shaped parts are inflatable. One end of each petal-shaped part is hinged to the maximum diameter end, and the other end is a free end with a radial travel stroke around the hinged end. The instrument compartment is provided with a capture component, a control component, and a charge / discharge component. The control component is electrically connected to the capture component and the charge / discharge component to control the capture component to capture the target and to control the charge / discharge component to charge or discharge the decelerator and the petal-shaped parts.

[0007] In one embodiment, an inertial navigation cabin is also included; the inertial navigation cabin is disposed inside the instrument cabin and electrically connected to the control component, and is used to send data information to the control component.

[0008] In one embodiment, the inertial navigation cabin is equipped with a positioning unit, a navigation unit, and an attitude detection unit.

[0009] In one embodiment, the petal-shaped portion is an isosceles triangular structure with an arc; the bottom edges of each adjacent petal-shaped portion contact each other, and when each free end moves inward around the hinge end, the side waists of each adjacent petal-shaped portion contact each other to form a positive cone shape.

[0010] In one embodiment, the control component includes a control unit, a servo motor, and a traction component; the control unit is disposed inside the instrument compartment and electrically connected to the servo motor; the servo motor is fixed to the outside of the instrument compartment and located near the top of the instrument compartment; one end of the traction component is connected to the servo motor, and the other end is connected to the free end of the petal-shaped portion.

[0011] In one embodiment, the capture assembly includes a capture unit and a recovery chamber. The recovery chamber is disposed inside the instrument compartment and located at the top. A capture mechanism is disposed therein. The capture unit is located at the lower part of the recovery chamber and is electrically connected to the control unit. It is used to receive instructions from the control unit, release the capture mechanism to capture the target, and store it in the recovery chamber.

[0012] In one embodiment, the inflation / deflation assembly includes an airbag chamber, a solenoid valve, an exhaust valve, a reducer inflation channel, and a petal-shaped part inflation channel; the airbag chamber is connected to the reducer and the petal-shaped part through the reducer inflation channel and the petal-shaped part inflation channel, respectively; the solenoid valve is located near the outlet of the airbag chamber and is located in the reducer inflation channel and the petal-shaped part inflation channel, respectively, for controlling the airbag chamber to inflate the reducer and the petal-shaped part; the exhaust valve is located in the petal-shaped part inflation channel for controlling the petal-shaped part to exhaust.

[0013] In one embodiment, the petal-shaped inflation channel includes a first inflation channel and a second inflation channel; each of the petals is combined to form a first petal group and a second petal group that are not interconnected; the airbag chamber is connected to the first petal group and the second petal group through the first inflation channel and the second inflation channel, respectively; and an exhaust valve is provided in the first inflation channel and the second inflation channel, respectively.

[0014] In one embodiment, the petal-shaped inflation channel includes a first inflation channel, a second inflation channel, a third inflation channel, and a fourth inflation channel; each of the petal-shaped parts is combined to form a first petal group, a second petal group, a third petal group, and a fourth petal group that are not interconnected; the airbag chamber is connected to the first petal group, the second petal group, the third petal group, and the fourth petal group through the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel, respectively; an exhaust valve is respectively provided in the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel.

[0015] A target protection and two-stage deceleration method for an inflatable reducer, the method comprising:

[0016] The capture component captures the target and retrieves it into the recovery capsule;

[0017] The inflation / deflation assembly receives instructions from the control assembly to inflate the reducer and the petal-shaped part, so that the inverted cone shape of the reducer and the upright cone shape of the petal-shaped part form a rhomboid spatial structure to envelop the target, and it leaves the original track and enters the re-entry track, completing the first stage of deceleration;

[0018] The rhomboid spatial structure decelerates to a set speed, and the control component controls the unfolding angle of each of the petals, thereby increasing the obstructed area of ​​the reducer, completing the secondary deceleration, and / or

[0019] The control component sends a command to the inflation / deflation component, and after receiving the command, the inflation / deflation component deflates the corresponding petal-shaped portion to adjust the flight attitude of the decelerator.

[0020] Compared with the prior art, the air-filled reducer target protection and two-stage deployment reduction device and method provided by the present invention have the following effects:

[0021] 1. By using the petal-shaped part surrounding the reducer, after capturing the target, the reducer and the petal-shaped part are simultaneously inflated to form a cavity structure that wraps around the target, thereby protecting the target and completing the first stage of deceleration; after the deceleration device enters the reentry track, it reaches the set speed after the first stage of deceleration, and the control component controls the petal-shaped part to unfold at a specified angle to increase the obstructed area and complete the second stage of deceleration.

[0022] 2. By adjusting the unfolding angle of each petal by controlling the components, and by adjusting the inflation pressure of each petal by coordinating with the inflation and deflation components, the turning angle of the deceleration device is changed, thereby achieving flight attitude adjustment and finally reaching the set landing point. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the target protection and two-stage deployment deceleration device of an air-filled reducer in one embodiment, showing the closed state structure.

[0024] Figure 2 This is a schematic diagram of the open state structure of the target protection and secondary deployment deceleration device of the pneumatic reducer in one embodiment;

[0025] Figure 3 This is a cross-sectional schematic diagram of a pneumatic reducer target protection and two-stage deployment deceleration device in one embodiment;

[0026] Figure 4 This is a schematic diagram of a target protection and two-stage deceleration method for an inflatable reducer in one embodiment;

[0027] Explanation of reference numerals in the attached drawings: reducer 11, petal-shaped part 12, fixed part 121, instrument compartment 13, inertial navigation compartment 14, control unit 15, servo motor 151, traction component 16, recovery compartment 17, capture mechanism 171, capture unit 172, airbag compartment 18. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] like Figures 1 to 3 As shown, the structure of the inflatable reducer target protection and two-stage deployment deceleration device provided by the present invention includes: a reducer 11, a petal-shaped part 12, and an instrument compartment 13; the reducer 11 is an inverted cone-shaped airbag structure, and the instrument compartment 13 is provided in the center of the inner surface of the inverted cone-shaped airbag. Several petal-shaped parts 12 are arranged around the end with the largest diameter of the inverted cone. Both the reducer 11 and the petal-shaped parts 12 are inflatable; one end of the petal-shaped part 12 is hinged to the end with the largest diameter, and the other end is a free end, which has a radial travel stroke around the hinged end; the instrument compartment 13 is provided with a capture component, a control component, and an inflation / deflation component. The control component is electrically connected to the capture component and the inflation / deflation component to control the capture component to capture the target, and to control the inflation / deflation component to inflate or deflate the reducer 11 and the petal-shaped parts 12.

[0033] The instrument compartment 13 also houses an inertial navigation module 14, which is electrically connected to the control components and used to send data information to them. Specifically, the inertial navigation module 14 contains a positioning unit, a navigation unit, and an attitude detection unit. The positioning unit primarily acquires the position information of the deceleration device, the navigation unit primarily acquires the target landing point information, and the attitude detection unit monitors the attitude information of the deceleration device in real time. Each unit sends relevant data to the control components, which then integrate the information and perform corresponding operations to adjust the attitude of the deceleration device to reach the target landing point.

[0034] Specifically, the inverted conical structure of the reducer 11 is formed by stacking several inflatable rings radially. Generally, nine inflatable rings are arranged, with several petal-shaped portions 12 surrounding the end of the ring with the largest diameter. Each petal-shaped portion 12 is a curved, isosceles triangular structure, with its base hinged to the end of the ring with the largest diameter of the reducer 11, and its apex being a free end. During installation, the base ends of adjacent petal-shaped portions 12 contact each other, and as the free ends move inward around the hinged ends, the side waists of adjacent petal-shaped portions 12 contact each other, forming a conical structure. It can be understood that after inflation, the inverted conical structure of the reducer 11 and the conical structure formed by the petal-shaped portions 12 combine to form a rhomboid cavity, used to protect the target after target acquisition. Preferably, the number of petal-shaped portions 12 is an even multiple of 2. The technical solution of this invention is illustrated with an example of eight petal-shaped portions shown in the accompanying drawings.

[0035] The control components include a control unit 15, a servo motor 151, and a traction component 16. The control unit 15 is a micro-control system, the core control system, primarily used to control the deployment angle of the petal-shaped portion 12 and to send commands to the capture and inflation / deflation components. For example, this micro-control system has a pressure sensor that monitors the inflation pressure. When the inflation pressure reaches a threshold, it sends a command to the inflation / deflation components to stop inflation or deflation. The servo motor 151 is located outside the instrument compartment 13, near the top of the instrument compartment 13, and is electrically connected to the control unit 15. One end of the traction component 16 is connected to the servo motor 151, and the other end is connected to the free end of the petal-shaped portion 12.

[0036] Specifically, a fixing part 121 is provided at the free end of the petal-shaped part 12, and the traction member 16 is connected to the free end of the petal-shaped part 12 through the fixing part 121. The number of servo motors 151 is generally set to an even number of 2, such as 2, 4, 6, etc., or each petal-shaped part 12 can be equipped with a corresponding servo motor 151 as needed. The servo motors 151 independently control the corresponding petal-shaped part 12, thereby realizing the control of the unfolding angle of the petal-shaped part 12. For example, when there are 2 servo motors 151, each servo motor 151 controls 4 petal-shaped parts 12 through the traction member 16, and two angles can be independently adjusted; or when there are 4 servo motors 151, each servo motor 151 controls 2 petal-shaped parts 12 through the traction member 16, and four angles can be independently adjusted. During operation, the control unit 15 sends a command to the servo motor to specify the required opening angle. The servo motor then operates according to the received command, pulling or releasing the traction member 16, thereby opening the petal-shaped portion 12 at different angles. By expanding at different angles, the obstructed area of ​​the reducer can be increased, and the air pressure of the petal-shaped portion 12 can be changed to achieve attitude adjustment. The traction member 16 can be a rigid rod or a flexible control cable; preferably, it is a flexible control cable for easy folding. The fixing part 121 has connecting holes for fixing the traction member 16.

[0037] The capture assembly includes a capture unit 172 and a recovery chamber 17. The recovery chamber 17 is located inside the instrument compartment 13 and at the top. It contains a capture mechanism 171, which is a flexible, expandable structure, preferably a mesh structure, such as a rope net. The capture unit 172 is a microelectronic device electrically connected to a control unit 15. It receives commands from the control unit 15, releases the capture mechanism 171 to capture the target, and collects the captured target into the recovery chamber 17.

[0038] It is understandable that, on the one hand, when the capture component is used as a capture device, the target in space can be collected into the recovery capsule 17 through the capture mechanism 171; on the other hand, when it is necessary to transport the target to the ground through the space station, the capture component can be used as a transportation device to place the target in the recovery capsule 17 for transportation.

[0039] The inflation / deflation assembly includes an airbag chamber 18, a solenoid valve, an exhaust valve, a reducer inflation channel, and a petal-shaped section inflation channel. The airbag chamber 18 is located within the instrument compartment 13 and is primarily used to store nitrogen, typically in a high-pressure nitrogen cylinder. The airbag chamber 18 is connected to the reducer and petal-shaped section via the reducer inflation channel and the petal-shaped section inflation channel, respectively. The solenoid valve is electrically connected to the control unit 15 and is located near the airbag chamber outlet, within both the reducer inflation channel and the petal-shaped section inflation channel, for controlling the inflation of the airbag chamber into the reducer and petal-shaped section. The exhaust valve is electrically connected to the control unit 15 and is located within the petal-shaped section inflation channel, for controlling the deflation of the petal-shaped section. Specifically, the solenoid valve controls the inflation of the reducer 11 and the petal-shaped section 12, and the exhaust valve controls the deflation of the petal-shaped section 12. To achieve stable attitude control, the number of petal-shaped section inflation channels is generally an even multiple of 2.

[0040] In one embodiment, when the petal-shaped parts 12 are combined to form a first petal group and a second petal group that are not interconnected, while the petal-shaped parts 12 within the petal group are in a connected state; the petal-shaped part inflation channel includes a first inflation channel and a second inflation channel, and the airbag chamber is connected to the first petal group and the second petal group through the first inflation channel and the second inflation channel respectively, and exhaust valves are respectively provided in the first inflation channel and the second inflation channel to control the exhaust of the first petal group and the second petal group, thereby changing the inflation pressure of the two petal groups respectively, thereby changing the turning angle of the deceleration device and realizing attitude control.

[0041] In one embodiment, when the petal-shaped parts 12 are combined to form a first petal group, a second petal group, a third petal group, and a fourth petal group that are not interconnected, and the petal-shaped parts 12 within the petal group are in a connected state; the petal-shaped part inflation channel includes a first inflation channel, a second inflation channel, a third inflation channel, and a fourth inflation channel. The airbag chamber is connected to the first petal group, the second petal group, the third petal group, and the fourth petal group through the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel, respectively. Exhaust valves are respectively provided in the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel to control the exhaust of the first petal group, the second petal group, the third petal group, and the fourth petal group, thereby changing the inflation pressure of the four petal groups, thereby changing the turning angle of the deceleration device and realizing attitude control.

[0042] It is worth noting that both the reducer 11 and the petal-shaped part 12 are made of flexible heat-resistant material, and the surface of the reducer 11 and the outer surface of the petal-shaped part 12 are covered with heat-insulating skin to block heat flow.

[0043] During operation, the capture mechanism 171 captures the target and stores it in the recovery chamber 17. The control component sends a command to control the airbag chamber 18 to fill the reducer 11 and the petal-shaped section 12 with nitrogen through the reducer inflation channel and the petal-shaped section inflation channel, respectively. The control component senses the inflation pressure of the reducer 11 and the petal-shaped section 12. When the inflation pressure reaches the threshold, inflation stops. Initially, the inflated petal-shaped section 12 is in a closed state, forming a diamond-shaped spatial structure with the reducer 11 to envelop and protect the target. The deceleration device increases drag and derails, leaving the original track and entering the reentry track, achieving primary deceleration.

[0044] When the rhomboid space structure decelerates to a relatively low speed, the captured target is unable to detach from the recovery capsule 17 due to Earth's gravity. At this point, the control unit 15 sends a command to the corresponding servo motor 151, based on the required opening angle of each petal 12. The servo motor 151 controls the free end of the petal 12 to expand radially outward around the hinge end to a set angle, forming a "petal" shape. This "petal" shape increases the obstructed area of ​​the reducer 11, completing the secondary deceleration. Simultaneously, the control unit 15 sends a command to the inflation / deflation assembly, which, upon receiving the command, deflates the corresponding petal group to adjust the reducer's flight attitude.

[0045] After capturing the target, this invention protects the target by closing the petal-shaped portion 12 to prevent it from detaching from the recovery capsule 17. After completing the first stage of deceleration, a second stage of deceleration is achieved through the combined use of two control methods. First, the deflection area is increased by controlling the unfolding angle of the petal-shaped portion 12, thus achieving secondary deceleration. Simultaneously, the unfolding angle is adjusted, and the inflation pressure of each petal group is controlled to change the turning angle of the "petals," thereby adjusting the decelerator's flight attitude and ultimately reaching the landing point.

[0046] In one embodiment, such as Figure 4 As shown, a target protection and two-stage deployment deceleration method for an inflatable reducer is provided, the method comprising:

[0047] Step 102: The capture component captures the target and retrieves it into the recovery capsule.

[0048] Step 104: The inflation / deflation assembly receives the instruction from the control assembly and inflates the reducer and the petal-shaped part, so that the inverted cone of the reducer and the positive cone of the petal-shaped part form a rhomboid spatial structure to wrap around the target, and it leaves the original track and enters the re-entry track, completing the first stage of deceleration.

[0049] Step 106: The rhomboid space structure decelerates to a set speed. The control component controls the unfolding angle of each petal, thereby increasing the obstructed area of ​​the reducer and completing the secondary deceleration, and / or

[0050] The control component sends a command to the inflation / deflation component, which then deflates the corresponding petal-shaped portion to adjust the decelerator's flight attitude.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pneumatic decelerator target protection and two-stage deployment deceleration device, comprising a decelerator, wherein the decelerator has an inverted conical cavity structure, and an instrument compartment is disposed at the center of the inner surface of the inverted conical cavity, characterized in that, Several petal-shaped portions are arranged around the end of the inverted cone with the largest diameter. Both the reducer and the petal-shaped portions are inflatable. One end of the petal-shaped portion is hinged to the end with the largest diameter, and the other end is a free end, which has a radial travel stroke around the hinged end; The instrument compartment is equipped with a capture component, a control component, and a charge / explode component. The control component is electrically connected to the capture component and the charge / explode component to control the capture component to capture the target and to control the charge / explode component to charge or vent the reducer and the petal-shaped part. The petal-shaped portion is an isosceles triangular structure with an arc. The bottom edges of each adjacent petal-shaped portion contact each other, and when each free end moves inward around the hinge end, the side waists of each adjacent petal-shaped portion contact each other, forming a positive cone shape; The capture assembly includes a capture unit and a recovery chamber.

2. The air-filled reducer target protection and two-stage deployment reduction device according to claim 1, characterized in that, It also includes the inertial navigation cabin; The inertial navigation cabin is located inside the instrument cabin and is electrically connected to the control component, used to send data information to the control component.

3. The air-filled reducer target protection and two-stage deployment reduction device according to claim 2, characterized in that, The inertial navigation cabin is equipped with a positioning unit, a navigation unit, and an attitude detection unit.

4. The air-filled reducer target protection and two-stage deployment reduction device according to claim 1, characterized in that, The control components include a control unit, a servo motor, and a traction component; The control unit is located inside the instrument compartment and is electrically connected to the servo motor. The servo motor is located on the outside of the instrument compartment and near the top of the instrument compartment; One end of the traction component is connected to the servo motor, and the other end is connected to the free end of the petal-shaped part.

5. The air-filled reducer target protection and two-stage deployment reduction device according to claim 4, characterized in that, The capture assembly includes a capture unit and a recovery chamber, comprising: The recovery chamber is located inside the instrument compartment and at the top; it is equipped with a capture mechanism. The capture unit is located at the lower part of the recovery chamber and is electrically connected to the control unit. It is used to receive instructions from the control unit, release the capture mechanism to capture the target, and store it in the recovery chamber.

6. The air-filled reducer target protection and two-stage deployment reduction device according to claim 1, characterized in that, The inflation / deflation assembly includes an airbag chamber, a solenoid valve, an exhaust valve, a reducer inflation channel, and a petal-shaped inflation channel. The airbag compartment is connected to the reducer and the petal-shaped part through the reducer inflation channel and the petal-shaped part inflation channel, respectively; The solenoid valve is located near the airbag compartment outlet and is situated within the reducer inflation channel and the petal-shaped part inflation channel, respectively, and is used to control the airbag compartment to inflate the reducer and the petal-shaped part. The exhaust valve is located inside the air passage of the petal-shaped part and is used to control the exhaust of the petal-shaped part.

7. The air-filled reducer target protection and two-stage deployment reduction device according to claim 6, characterized in that, The petal-shaped inflation channel includes a first inflation channel and a second inflation channel; Each of the aforementioned petal-like portions is combined to form a first petal group and a second petal group that are not interconnected; The airbag chamber is connected to the first valve group and the second valve group through the first inflation channel and the second inflation channel, respectively. An exhaust valve is provided in the first inflation channel and the second inflation channel respectively.

8. The air-filled reducer target protection and two-stage deployment reduction device according to claim 6, characterized in that, The petal-shaped inflation channel includes a first inflation channel, a second inflation channel, a third inflation channel, and a fourth inflation channel; Each of the aforementioned petal-like portions is combined to form a first petal group, a second petal group, a third petal group, and a fourth petal group that are not interconnected; The airbag compartment is connected to the first valve group, the second valve group, the third valve group, and the fourth valve group respectively through the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel; An exhaust valve is provided in each of the first inflation channel, the second inflation channel, the third inflation channel, and the fourth inflation channel.

9. A target protection and two-stage deceleration method for an inflatable reducer, characterized in that, The method employing the pneumatic decelerator target protection and two-stage deployment deceleration device according to any one of claims 1 to 8, comprises: The capture component captures the target and retrieves it into the recovery capsule; The inflation / deflation assembly receives instructions from the control assembly to inflate the reducer and the petal-shaped part, so that the inverted cone shape of the reducer and the upright cone shape of the petal-shaped part form a rhomboid spatial structure to envelop the target, and it leaves the original track and enters the re-entry track, completing the first stage of deceleration; The rhomboid spatial structure decelerates to a set speed, and the control component controls the unfolding angle of each of the petals, thereby increasing the obstructed area of ​​the reducer, completing the secondary deceleration, and / or The control component sends a command to the inflation / deflation component, and after receiving the command, the inflation / deflation component deflates the corresponding petal-shaped portion to adjust the flight attitude of the decelerator.

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