Thermal protection device of reentry vehicle and control method

Abstract

The invention provides a thermal protection device of a reentry vehicle and a control method.The device comprises a gas cylinder, an adjusting valve, an angle changing module and a controller, and one end of the adjusting valve is connected with an outlet of the gas cylinder; the variable-angle module comprises a hose and a transmission mechanism, one end of the hose is connected with one end, away from the gas cylinder, of the regulating valve, one end of the transmission mechanism is connected with the hose, and the other end is connected with the regulating valve; and the controller is respectively connected with the regulating valve and the transmission mechanism. The output flow of the adjusting valve is adjusted through the transmission mechanism, more accurate jet flow can be carried out according to changes of complex flight working conditions, the aircraft has higher adaptability in the whole flight process, and meanwhile the jet flow can be saved; the jet flow angle of the hose is adjusted through the transmission mechanism, jet flow can directly face incoming flow under multiple attack angles, and the jet flow is efficiently utilized; and by integrating jet flow adjustment and jet angle adjustment, the load space is saved, and the product integration degree is improved.

Description

Technical Field

[0001] The present invention relates to the field of aircraft technology, and in particular to a thermal protection device and a control method for a reentry vehicle. Background Art

[0002] With the development of the aerospace industry, round-trip transportation between the earth and the sky and deep space exploration missions will be the focus of future research.

[0003] Compared with traditional reentry deceleration methods and inflatable reentry vehicles, the existing mechanically deployable reentry vehicles have the advantages of small envelope constraints, high carrying efficiency and good deceleration effect. However, the reentry vehicle uses traditional ballistic reentry process to generate a large amount of aerodynamic heat, which causes burning to the vehicle surface and the vehicle as a whole. How to effectively and reasonably provide thermal protection for the reentry vehicle is one of the problems that need to be solved urgently. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a thermal protection device and a control method for a reentry vehicle, so as to improve the jet drop efficiency under complex working conditions and save the jet flow rate.

[0005] In a first aspect, the present invention provides a thermal protection device for a reentry vehicle, comprising:

[0006] Gas cylinder, which is used to store the jet working medium gas;

[0007] A regulating valve is used to adjust the jet flow rate, and one end of the regulating valve is connected to the outlet of the gas cylinder;

[0008] The variable angle module comprises a hose and a transmission mechanism, one end of the hose is connected to an end of the regulating valve away from the gas cylinder, one end of the transmission mechanism is connected to the hose, and the other end is connected to the regulating valve;

[0009] The controller is connected to the regulating valve and the transmission mechanism respectively, and is used for:

[0010] Based on the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained; the transmission mechanism is controlled to act so that the output flow rate of the regulating valve is the jet flow rate; the transmission mechanism is controlled to work so that the swing angle of the hose is the jet angle.

[0011] Optionally, the transmission mechanism includes: a double-headed motor, a connecting rod and a transmission assembly, one end of the double-headed motor is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod, the other end of the connecting rod is connected to the hose, and the controller is connected to the double-headed motor, and the controller is also used for:

[0012] Based on the jet angle, a first torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the first torque to drive the swing angle of the hose to be the jet angle.

[0013] Optionally, the transmission assembly includes a transmission rod, a connecting piece and a conveyor belt, one end of the transmission rod is connected to the connecting rod, and the other end is connected to the conveyor belt through the connecting piece, wherein the connecting piece is threadedly connected to the transmission rod.

[0014] Optionally, the other end of the double-headed motor is connected to the regulating valve, and the controller is connected to the double-headed motor, and the controller is also used for:

[0015] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to work so that the double-headed motor rotates the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0016] Optionally, the regulating valve includes a valve body, a ball and a valve stem, the ball is arranged in the valve body, one end of the valve stem passes through the valve body and is connected to the ball, and a fan-shaped opening is provided on the ball.

[0017] Optionally, the device further comprises a connecting pipe, one end of which is connected to one end of the hose, and the other end of which is connected to the outlet of the regulating valve.

[0018] In a second aspect, the present invention further provides a method for controlling a thermal protection device of a reentry vehicle, comprising:

[0019] Based on the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained;

[0020] Control the action of the transmission mechanism so that the output flow of its regulating valve is the jet flow;

[0021] The transmission mechanism is controlled to work so that the swing angle of the hose is the jet angle.

[0022] Optionally, controlling the transmission mechanism to operate so that the output flow of the regulating valve is the jet flow includes:

[0023] Based on the jet angle, a first torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the first torque to drive the swing angle of the hose to be the jet angle.

[0024] Optionally, controlling the transmission mechanism to operate so that the swing angle of the hose is a jet angle includes:

[0025] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to work so that the double-headed motor rotates the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0026] Optionally, the method further comprises:

[0027] After a single jet is completed, the double-head motor is controlled to work so that the hose is at an initial 0 angle of attack position and the regulating valve is in a closed state.

[0028] A thermal protection device and control method for a reentry vehicle provided in an embodiment of the present invention can adjust the output flow of a regulating valve through a transmission mechanism, so that a more accurate jet can be performed in response to changes in complex flight conditions, so that the aircraft has stronger adaptability during the overall flight process, and the jet flow can be saved at the same time; the jet angle of the hose is adjusted by the transmission mechanism, which solves the problem that the traditional jet device has poor jet heat reduction effect under a certain angle of attack state. The thermal protection device of the present invention can realize the jet facing the incoming flow under multiple angles of attack, and make efficient use of the jet; by integrating the adjustment of the jet flow and the jet angle, the control difficulty is greatly reduced, the load space is saved, and the product integration is improved.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The schematic diagram of the structure of the existing non-ablation adaptive heat protection and drag reduction system provided by the present invention is shown;

[0032] Figure 2 A schematic structural diagram of a thermal protection device for a reentry vehicle provided by an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of a mechanically deployable reentry vehicle provided by the present invention is shown;

[0034] Figure 4 A schematic diagram of an exploded structure of a regulating valve provided by an embodiment of the present invention is shown;

[0035] Figure 5 A schematic diagram showing the structure of a sphere provided by an embodiment of the present invention is shown;

[0036] Figure 6 A schematic diagram of the working process of the thermal protection device of the reentry vehicle provided by the embodiment of the present invention is shown;

[0037] Figure 7 A schematic flow chart of a method for controlling thermal protection of a reentry vehicle provided by an embodiment of the present invention is shown.

[0038] Explanation of the main component symbols: 100-gas cylinder; 200-regulating valve; 300-double-head motor; 400-connecting pipe; 500-connecting rod; 600-hose; 700-transmission rod; 800-conveyor belt; 210-valve stem; 220-valve body; 230-ball; 240-sealing gasket; 250-valve seat; 260-pressure cover. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0040] Existing methods of drag reduction and heat protection include reverse jet, adding drag reduction rod, adding aerodynamic disk, windward cavity and energy deposition, etc. Figure 1 As shown, the existing non-ablative adaptive heat protection and drag reduction system places liquid at the front end of the aircraft head and sets a support rod. By changing the flow field structure and generating heat through friction, the liquid evaporates and is ejected.

[0041] The inventors found in their research that there are many problems with the existing thermal protection methods. For example, if jet heat release is used, the working fluid needs to be carried, which takes up a large space inside the aircraft, and the mass of the working fluid will reduce the load that the aircraft can carry. If an additional device is used, the additional device will be exposed to the outer end of the aircraft and will be burned, which will affect the shape and center of mass of the reentry vehicle and cannot meet the requirements of reusability. Based on this, an embodiment of the present invention provides a thermal protection device and control method for a reentry vehicle, which adjusts the output flow of the regulating valve and the jet angle of the regulating hose through a transmission mechanism to achieve more accurate jets and save jet flow under complex flight conditions, reduce the control difficulty of thermal protection, save load space, and improve product integration.

[0042] Figure 2 The following is a schematic diagram of the structure of a thermal protection device for a reentry vehicle provided by an embodiment of the present invention. Figure 2As shown, the device includes: a gas cylinder 100, a regulating valve 200, a variable angle module and a controller, wherein the variable angle module includes a hose 600 and a transmission mechanism, one end of the hose 600 is connected to the end of the regulating valve 200 away from the gas cylinder 100, one end of the transmission mechanism is connected to the hose 600, and the other end is connected to the regulating valve 200, one end of the regulating valve 200 is connected to the outlet of the gas cylinder 100, the gas cylinder 100 is used to store the jet working fluid gas; the regulating valve 200 is used to adjust the jet flow rate, and the controller is respectively connected to the regulating valve 200 and the transmission mechanism.

[0043] The controller is used to: obtain the jet flow and jet angle corresponding to the jet working condition based on the jet working condition; control the transmission mechanism to make the output flow of the regulating valve 200 the jet flow; control the transmission mechanism to make the swing angle of the hose 600 the jet angle.

[0044] like Figure 3 As shown, the heat protection device of the reentry vehicle of the present invention is arranged on the inner side of the heat shield of the mechanically deployable reentry vehicle. The mechanically deployable reentry vehicle has two main forms during flight. The heat shield is in a folded state during launch and on-orbit, and in an unfolded state during reentry. The heat shield is similar to an umbrella, and can form a larger aerodynamic deceleration surface and play a heat insulation role when in the unfolded state. The internal memory of the heat shield has a certain space, and the heat protection device of the reentry vehicle of the present invention can be arranged in the space.

[0045] A thermal protection device for a reentry vehicle provided in an embodiment of the present invention can adjust the output flow of a regulating valve through a transmission mechanism, so as to perform more precise jets in response to changes in complex flight conditions, thereby making the aircraft more adaptable during the overall flight process and saving jet flow; by adjusting the jet angle of the hose through a transmission mechanism, the problem that the traditional jet device has poor jet heat reduction effect under a certain angle of attack is solved, and the thermal protection device of the present invention can realize the jet facing the incoming flow under multiple angles of attack, thereby making efficient use of the jet; by integrating the adjustment of the jet flow and the jet angle, the control difficulty is greatly reduced, the load space is saved, and the product integration is improved.

[0046] In an optional embodiment, the transmission mechanism includes: a double-headed motor 300, a connecting rod 500 and a transmission assembly, one end of the double-headed motor 300 is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod 500, the other end of the connecting rod 500 is connected to the hose 600, and the controller is connected to the double-headed motor 300, and the controller is also used for:

[0047] Based on the jet angle, the first torque of the double-headed motor 300 is obtained; the double-headed motor 300 is controlled to rotate the first torque to drive the swing angle of the hose 600 to be the jet angle.

[0048] In an optional embodiment, the transmission assembly includes a transmission rod 700, a connecting piece and a conveyor belt 800, one end of the transmission rod 700 is connected to the connecting rod 500, and the other end is connected to the conveyor belt 800 through the connecting piece, wherein the connecting piece is threadedly connected to the transmission rod 700.

[0049] Specifically, Figure 1 As shown, the transmission assembly is a component that converts rotary motion into linear motion, and generally adopts a screw nut structure. One end of the connecting rod 500 is fixedly connected to the side wall of the output port of the hose 600, and the other end is fixedly connected to one end of the screw, the other end of the screw is threadedly connected to the nut, the outer wall of the nut abuts against the inner wall of one end of the transmission belt, and the other end of the transmission belt is connected to one of the output shafts of the double-headed motor 300.

[0050] The output shaft of the double-headed motor 300 rotates, driving the transmission belt to move. Under the friction of the transmission belt, the nut performs a rotational motion, thereby driving the lead screw to perform a linear motion to drive the hose 600 to swing, thereby adjusting the injection angle of the jet.

[0051] In an optional embodiment, the other end of the double-headed motor 300 is connected to the regulating valve 200, and the controller is connected to the double-headed motor 300, and the controller is also used for:

[0052] Based on the jet flow, a second torque of the double-headed motor 300 is obtained; the double-headed motor 300 is controlled to work so that the double-headed motor 300 rotates the second torque to drive the outlet flow of the regulating valve 200 to be the jet flow.

[0053] In an optional embodiment, the regulating valve 200 includes a valve body 220, a ball 230 and a valve stem 210. The ball 230 is disposed in the valve body 220. One end of the valve stem 210 passes through the valve body 220 and is connected to the ball 230. The ball 230 is provided with a fan-shaped opening.

[0054] Specifically, the inlet of the regulating valve 200 is connected to the outlet of the gas cylinder 100, the outlet of the regulating valve 200 is connected to the hose 600, and the valve stem 210 of the regulating valve 200 is connected to the other output shaft of the double-headed motor 300. The double-headed motor 300 is used to adjust the opening and closing of the regulating valve 200, thereby adjusting the jet flow rate.

[0055] like Figure 4As shown, the regulating valve 200 is a micro electric ball valve, which mainly includes a valve body 220, a valve seat 250, a ball 230, a sealing gasket 240, a valve stem 210 and a gland 260. The ball 230 is arranged in the valve body 220, and the valve stem 210 passes through the valve body 220 and is fixedly connected to one end of the ball 230. The sealing gasket 240, the valve seat 250 and the gland 260 are arranged on one side of the valve body 220. The other end of the valve body 220 is fixedly connected to the other output shaft of the double-headed motor 300, and the valve stem 210 is driven to rotate by the double-headed motor 300, thereby driving the ball 230 to rotate, so as to adjust the door opening of the valve 200, thereby realizing the regulation of the gas flow.

[0056] Further, if Figure 5 As shown, the ball 230 of the regulating valve 200 of the present invention has a fan-shaped through hole.

[0057] In an optional embodiment, a connecting pipe 400 is further included, one end of the connecting pipe 400 is connected to one end of the hose 600 , and the other end of the connecting pipe 400 is connected to the outlet of the regulating valve 200 .

[0058] Furthermore, the gas cylinder 100 in the present invention adopts a small gas cylinder for storing the jet working fluid gas, and relies on the pressure difference between the preset gas storage pressure and the external air pressure to push the gas to be ejected outward.

[0059] like Figure 6 As shown, the working process of a thermal protection device of a reentry vehicle in this application is as follows:

[0060] Initialization process: At this time, the regulating valve is in the closed state, the hose is in the initial 0 attack angle and facing the incoming flow, the jet gas is stored in the gas cylinder, and the gas jet channel is in the blocked state;

[0061] Jet opening process: When the aircraft encounters a working condition that requires a jet, first, the regulating valve is opened by a double-head motor to ensure that the jet can be ejected, and then it is determined whether the jet flow rate and jet angle need to be changed according to the flight working condition, that is, according to the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained;

[0062] Jet variable flow control process: When the jet needs to adjust the flow according to the jet working conditions, the jet variable flow process is started, and the required flow of the jet and the motor torque required to rotate the regulating valve to the flow are calculated according to the required aerodynamic heat reduction, so that the required flow jet enters the pipeline and is finally ejected through the hose, thereby adapting to thermal protection under different working conditions;

[0063] Jet angle control process: When the jet needs to adjust the angle according to the jet working conditions, the jet angle change process is started. The jet angle required to face the incoming flow and the motor torque of the jet angle are calculated according to the change of the flight attack angle. The transmission mechanism is used to make the hose outlet reach the position facing the incoming flow. The jet passes through the regulating valve and finally sprays out of the hose, thereby realizing the angle adjustment of the hose and enhancing the adaptability of the jet to cool down the heat.

[0064] End of single jet: When a single jet ends, it returns to the initialization process, the regulating valve is in the closed state, the hose is reset, and waits for the next jet process.

[0065] The thermal protection device of a reentry vehicle provided by the present invention has the following beneficial effects:

[0066] 1. By adjusting the size of the regulating valve surface to control and adjust the flow of the jet, more accurate jets can be made according to changes in complex flight conditions. Compared with traditional jet devices, it has stronger adaptability during the overall flight process and can save jet flow;

[0067] 2. The jet angle of the hose is adjusted by the transmission mechanism, which solves the problem that the traditional jet device has poor heat reduction effect under the attack angle state. The jet angle can be adjusted based on the jet working conditions to achieve the jet facing the incoming flow under multiple attack angles, making efficient use of the jet;

[0068] 3. Integrating the variable flow and variable angle control methods into one thermal protection device reduces the control difficulty, saves load space, and improves product integration.

[0069] Figure 7 A schematic flow chart of a control method for a thermal protection device of a reentry vehicle provided by an embodiment of the present invention is shown in FIG. Figure 7 As shown, the method comprises the following steps:

[0070] Step S110, based on the jet working condition, obtaining the jet flow rate and jet angle corresponding to the jet working condition;

[0071] Step S120, controlling the transmission mechanism to operate so that the output flow of the regulating valve is the jet flow;

[0072] Step S130, controlling the transmission mechanism to operate so that the swing angle of the hose is the jet angle.

[0073] In an optional embodiment, in step S120, controlling the transmission mechanism to operate so that the output flow of the regulating valve is the jet flow includes:

[0074] Based on the jet angle, a first torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate the first torque to drive the swing angle of the hose to be the jet angle.

[0075] In an optional embodiment, in step S130, controlling the transmission mechanism to operate so that the swing angle of the hose is a jet angle includes:

[0076] Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to work so that the double-headed motor rotates the second torque to drive the outlet flow of the regulating valve to be the jet flow.

[0077] In an optional embodiment, the method further includes:

[0078] After a single jet is completed, the double-head motor is controlled to work so that the hose is at an initial 0 angle of attack position and the regulating valve is in a closed state.

[0079] The method provided in the embodiment of the present application has the same implementation principle and technical effects as those in the aforementioned device embodiment. For the sake of brief description, for matters not mentioned in the method embodiment, reference may be made to the corresponding contents in the aforementioned device embodiment.

[0080] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0081] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0082] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. They should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A thermal protection device for a reentry vehicle, characterized in that: include: A gas cylinder, wherein the gas cylinder is used to store the jet working medium gas; A regulating valve, used for adjusting the jet flow rate, one end of the regulating valve is connected to the outlet of the gas cylinder; The variable angle module comprises a hose and a transmission mechanism, wherein one end of the hose is connected to an end of the regulating valve away from the gas cylinder, one end of the transmission mechanism is connected to the hose, and the other end is connected to the regulating valve; A controller is connected to the regulating valve and the transmission mechanism respectively, and the controller is used for: Based on the jet working condition, the jet flow rate and jet angle corresponding to the jet working condition are obtained; the transmission mechanism is controlled to operate so that the output flow rate of the regulating valve is the jet flow rate; the transmission mechanism is controlled to operate so that the swing angle of the hose is the jet angle.

2. A thermal protection device for a reentry vehicle according to claim 1, characterized in that: The transmission mechanism comprises: a double-headed motor, a connecting rod and a transmission assembly, one end of the double-headed motor is connected to one end of the transmission assembly, the other end of the transmission assembly is connected to one end of the connecting rod, the other end of the connecting rod is connected to the hose, the controller is connected to the double-headed motor, and the controller is also used for: Based on the jet angle, a first torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate by the first torque to drive the swing angle of the hose to be the jet angle.

3. A thermal protection device for a reentry vehicle according to claim 2, characterized in that: The transmission assembly includes a transmission rod, a connecting piece and a conveyor belt, one end of the transmission rod is connected to the connecting rod, and the other end is connected to the conveyor belt through the connecting piece, wherein the connecting piece is threadedly connected to the transmission rod.

4. A thermal protection device for a reentry vehicle according to claim 2, characterized in that: The other end of the double-headed motor is connected to the regulating valve, and the controller is connected to the double-headed motor. The controller is also used for: Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to operate so that the double-headed motor rotates the second torque to drive the outlet flow of the regulating valve to be the jet flow.

5. A thermal protection device for a reentry vehicle according to claim 1 or 4, characterized in that: The regulating valve comprises a valve body, a ball and a valve stem. The ball is arranged in the valve body. One end of the valve stem passes through the valve body and is connected to the ball. A fan-shaped opening is arranged on the ball.

6. A thermal protection device for a reentry vehicle according to claim 1, characterized in that: It also includes a connecting pipe, one end of which is connected to one end of the hose, and the other end of which is connected to the outlet of the regulating valve.

7. A control method for a thermal protection device of a reentry vehicle, characterized in that: include: Based on the jet working condition, a jet flow rate and a jet angle corresponding to the jet working condition are obtained; Controlling the transmission mechanism to make the output flow of its regulating valve equal to the jet flow; The transmission mechanism is controlled to work so that the swing angle of the hose is the jet angle.

8. The control method of a thermal protection device of a reentry vehicle according to claim 7, characterized in that: The control transmission mechanism operates so that the output flow of the regulating valve is the jet flow, including: Based on the jet angle, a first torque of the double-headed motor is obtained; the double-headed motor is controlled to rotate by the first torque to drive the swing angle of the hose to be the jet angle.

9. The control method of a thermal protection device of a reentry vehicle according to claim 7, characterized in that: Controlling the transmission mechanism to operate so that the swing angle of the hose is the jet angle includes: Based on the jet flow, a second torque of the double-headed motor is obtained; the double-headed motor is controlled to operate so that the double-headed motor rotates the second torque to drive the outlet flow of the regulating valve to be the jet flow.

10. The control method of a thermal protection device of a reentry vehicle according to claim 7, characterized in that: The method further comprises: After a single jet is completed, the double-head motor is controlled to work so that the hose is at an initial 0 angle of attack position and the regulating valve is in a closed state.

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