Variable-angle flexible parabolic antenna rolling and unfolding mechanism and regulation and control method thereof

Abstract

The invention relates to a variable-angle flexible parabolic antenna rolling and unfolding mechanism and a regulation and control method thereof. The variable-angle flexible parabolic antenna rolling and unfolding mechanism comprises six uniformly distributed flexible stretching arms, an outer box body, a central base, a driving module, an angle regulation module and a power supply. The central base is integrally formed by upper and lower bases; the driving module comprises six driving motors; the angle adjusting module comprises a center fixing shaft lead screw stepping motor, a moving shaft, an on-shaft support, a lever and a support of the lever. The center fixed shaft lead screw stepping motor is in threaded connection with the moving shaft, and the on-shaft support is used for being connected with the lever. The driving module is fixed in the outer box body; and the power supply is arranged at the lower part of the upper base. The driving module and the angle adjusting module can achieve unfolding and angle adjustment and control through wireless remote control. The portable flexible parabolic antenna rolling and unfolding mechanism provided by the invention is simple in structure, high in space utilization rate and variable in angle, and can meet the application requirements of spatial large-aperture deployable antennas.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical structure design and manufacturing, in particular to a variable-angle flexible parabolic antenna rolling-up mechanism and a control method thereof. Background Art

[0002] As an important component of satellite antennas, parabolic antennas are widely used in deep space exploration, mobile communications, national defense, meteorological monitoring, etc. In recent years, with the rapid development of the above disciplines, the research on parabolic antennas has also attracted more and more attention. Space deployable structure technology is the main means to solve the contradiction between large-size spacecraft structure and rocket launch envelope restrictions. Since the 1990s, the demand for major national projects such as manned spaceflight, lunar exploration, Mars exploration, large space telescopes, and high-resolution earth observation has continued to increase, but the current traditional deployable mechanisms are mostly truss structures, mainly composed of rigid rods and joint hinges. With the large-scale deployment of the deployable mechanism, its body mass increases sharply. The lightweight design of the deployable mechanism is one of the key issues that need to be solved urgently. In recent years, with the development of material technology, new materials have been increasingly used in deployable mechanisms, such as replacing ordinary metal materials with carbon fiber composite materials. Therefore, large-scale, lightweight, and high-precision space deployable structures have become a hot issue in the field of aerospace science and technology in my country. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a variable-angle flexible parabolic antenna rolling-up mechanism and a control method thereof, so as to achieve stable antenna rolling-up, adjustable angle, and intelligent deployment with high synchronization, thereby improving the problems of bulky deployable space structure, complex design, large space occupancy, and limited angle of traditional parabolic antennas.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a variable-angle flexible parabolic antenna rolling-up mechanism, comprising six evenly distributed flexible extension arms (1), an outer box body (2), a central base (2-1), a driving module (2-2), and an angle adjustment module (3); the driving module (2-2) and the angle adjustment module (3) are fixed to the central base (2-1) inside the box body.

[0005] In a preferred embodiment, the flexible extension arm (1) is designed and manufactured by a composite material layer structure, and the thickness is t The ratio to the radius is less than 1 / 20.

[0006] In a preferred embodiment, the structural characteristic parameters of the flexible extension arm (1) include: the radius of the flexible extension arm (1) is , the central angle is , the length is , the longitudinal curvature is , longitudinal chord length The transition connection area of ​​the flexible extension arm (1) defines a transition end, and the other end is a free end; the length of the transition connection area is The corners of the transitional connection area of ​​the flexible extension arm (1) are chamfered, and the chamfer radius is , the longitudinal center angle is , the height of the free end from the center lower base (2-4) is .

[0007] In a preferred embodiment, the transition end of the flexible extension arm (1) is glued to the lever (1-1), and the lever (1-1) is riveted to the lever bracket (2-4-1) on the central lower base (2-4).

[0008] In a preferred embodiment, the lever (1-1) is connected to the shaft bracket (3-2-1) by rivets, and a gap of length 1 is present at the connection between the lever (1-1) and the lever bracket (2-4-1). LS When the lever (1-1) is horizontal, the distance between it and the lever bracket (2-4-1) is ,and = .

[0009] In a preferred embodiment, the angle adjustment module (3) comprises a central lower base (2-4), a central fixed-axis screw stepper motor (3-1), a motion axis (3-2), an upper shaft bracket (3-2-1), a power supply (2-3-1), and an angle control component (4); the central fixed-axis screw stepper motor (3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; the motion axis (3-2) is threadedly connected to the central fixed-axis screw stepper motor (3-1), and the upper shaft bracket (3-2-1) is welded to the outer side of the motion axis (3-2); the power supply (2-3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; and the angle control component (4) is composed of a control development board and a drive controller, and is fixed to the outer side of the outer box by bolts.

[0010] In a preferred embodiment, the angle adjustment range of the angle adjustment module (3) is θ=[- , ] .

[0011] In a preferred embodiment, the movement displacement of the movement axis (3-2) is D, when the free end of the flexible extension arm is at a height of 0 When the flexible extension arm (1) rotates through an angle δ = .

[0012] In a preferred embodiment, the drive module (2-2) comprises six drive motors (2-2-1), a power supply (2-3-1), a central upper base (2-3), and a drive control component (5); the six drive motors (2-2-1) are connected in series and arranged in a regular hexagonal pattern on the upper surface of the central upper base (2-3) inside the box body; the power supply (2-3-1) is placed on the lower surface of the central upper base (2-3); the drive control component (5) is composed of a control development board and a drive controller, and is fixed to the outside of the outer box body by bolts.

[0013] The present invention also provides a control method for a variable-angle flexible parabolic antenna roll-up mechanism, based on the variable-angle flexible parabolic antenna roll-up mechanism, including an unfolding control method and an angle control method, including the following steps: The unfolding control method is as follows: in the rolled-up state, after the wireless remote controller is activated, the driving control component (5) receives an electrical signal and drives the six series driving motors (2-2-1) to push out the screw rods at the same time, and the thrust of the screw rods acts on the six flexible extension arms (1). The six flexible extension arms (1) are immediately unfolded after receiving the thrust of the screw rods. After the six flexible extension arms (1) are unfolded, the driving control component (5) sends a command to the motor to stop moving, and the unfolding of the six flexible extension arms is completed; Angle control method: The angle adjustment module (3) is remotely controlled by wireless signals. After being started, the central fixed axis lead screw stepper motor (3-1) is driven by the angle control component (4), and the lead screw on the central fixed axis lead screw stepper motor (3-1) drives the motion axis (3-2) to move downward, and drives the six extension arms (1) to move upward through the lever (1-1) connected to the motion axis; when the flexible extension arm (1) reaches a preset height, the angle control component (4) sends a command to control the motor to stop moving; thereby, the six extension arms are deployed at different angles; thus, the deployment of a flexible roll-up antenna with a large telescopic ratio and a large angle can be realized.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a convenient flexible parabolic antenna rolling-up mechanism with simple structure, high space utilization and adjustable angle, which can meet the practical application requirements of large-aperture deployable antennas in space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention when it is in a rolled-up configuration; Figure 2 It is a schematic diagram of the structure of the present invention when it is in an expanded configuration; Figure 3 is a schematic diagram of the structure of the drive module of the present invention when it is in an expanded configuration; Figure 4It is a schematic diagram of the angle adjustment module structure of the present invention when it is in an expanded configuration; Figure 5 It is a schematic diagram of the structure of the lever bracket of the present invention; Figure 6 It is a schematic diagram of the flexible extension arm of the present invention being unfolded.

[0016] In the figure: 1 flexible extension arm, 1-1 lever, 2 outer box body, 2-1 center base, 2-2 drive module, 2-2-1 motor, 2-3 center upper base, 2-3-1 power supply, 2-4 center lower base, 2-4-1 lever bracket, 3 angle adjustment module, 3-1 center fixed axis screw stepper motor, 3-2 motion axis, 3-2-1 axis bracket, 4 angle control component, 5 drive control component. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0021] The present invention provides a variable angle flexible parabolic antenna unrolling mechanism, such as Figure 1-6 As shown, it comprises six evenly distributed flexible extension arms 1, an outer box body 2, an angle adjustment module 3, an angle control component 4, and a drive control component 5; the angle control component (4) and the drive control component (5) are composed of a control development board and a drive controller, which are fixed to the outside of the outer box body by bolts.

[0022] like Figure 1-2 As shown, this embodiment provides a variable-angle flexible parabolic antenna unrolling mechanism, wherein the six flexible extension arms (1) are in a steady-state configuration when folded. Figure 1 , unfolded into an umbrella-like configuration Figure 2 , with a higher roll-up and storage ratio.

[0023] like Figure 3-4As shown, the variable-angle flexible parabolic antenna driving module (2-2) comprises six driving motors (2-2-1), a power supply (2-3-1), a central upper base (2-3), and a driving control component (5); the six driving motors (2-2-1) are connected in series and arranged in a regular hexagonal pattern on the upper surface of the central upper base (2-3) inside the box body; the power supply (2-3-1) is placed on the lower surface of the central upper base (2-3); the driving control component (5) is fixed to the outside of the outer box body by bolts; when the lever (1-1) is horizontal, the distance between it and the lever bracket (2-4-1) is .

[0024] like Figure 3-4 As shown, the variable-angle flexible parabolic antenna angle adjustment module (3) comprises a central lower base (2-4) fixed inside a box body, a central fixed-axis screw stepper motor (3-1), a motion axis (3-2), a lever (1-1), an axis bracket (3-2-1), a power supply (2-3-1), and an angle control component (4); the central fixed-axis screw stepper motor (3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; the motion axis (3-2) is threadedly connected to the central fixed-axis screw stepper motor (3-1), and the axis bracket (3-2-1) is welded to the outside of the motion axis; the power supply (2-3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; and the angle control component (4) is fixed to the outside of the outer box body by bolts.

[0025] like Figure 5 , a detailed view of the variable angle flexible parabolic antenna angle adjustment module (3), wherein the connection between the lever (1-1) and the lever bracket (2-4-1) has a length of LS chute.

[0026] like Figure 6 As shown, the flexible extension arm (1) is designed and manufactured by composite material layer structure, and the ratio of thickness t to radius is less than 1 / 20. Its structural characteristic parameters include: the radius of the extension arm is , the central angle is , the length is , the longitudinal curvature is , longitudinal chord length of the extended arm ; The transition connection area of ​​the extension arm defines the transition end, and the other end is the free end. The length of the transition connection area is ; The corners of the transition area of ​​the flexible extension arm are chamfered, and the chamfer radius is , the longitudinal center angle is , the height of the free end from the center lower base (2-4) is .

[0027] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A variable-angle flexible parabolic antenna unrolling mechanism, characterized in that: It comprises six evenly distributed flexible extension arms (1), an outer box body (2), a central base (2-1), a drive module (2-2), and an angle adjustment module (3); the drive module (2-2) and the angle adjustment module (3) are fixed to the central base (2-1) inside the box body.

2. The variable-angle flexible parabola antenna unrolling mechanism according to claim 1, characterized in that: The flexible extension arm (1) is designed and manufactured by a composite material layer structure, and the thickness t The ratio to the radius is less than 1 / 20.

3. The variable-angle flexible parabola antenna unrolling mechanism according to claim 2, characterized in that: The structural characteristic parameters of the flexible extension arm (1) include: the radius of the flexible extension arm (1) is , the central angle is , the length is , the longitudinal curvature is , longitudinal chord length The transition connection area of ​​the flexible extension arm (1) defines a transition end, and the other end is a free end; the length of the transition connection area is The corners of the transitional connection area of ​​the flexible extension arm (1) are chamfered, and the chamfer radius is , the longitudinal center angle is , the height of the free end from the center lower base (2-4) is .

4. The variable-angle flexible parabola antenna unrolling mechanism according to claim 1, characterized in that: The transition end of the flexible extension arm (1) is glued to the lever (1-1), and the lever (1-1) is connected to the lever bracket (2-4-1) on the central lower base (2-4) by rivets.

5. The variable-angle flexible parabola antenna unrolling mechanism according to claim 4, characterized in that: The lever (1-1) is connected to the shaft bracket (3-2-1) by rivets, and a gap of length LS When the lever (1-1) is horizontal, the distance between it and the lever bracket (2-4-1) is ,and = .

6. The variable-angle flexible parabola antenna unrolling mechanism according to claim 3, characterized in that: The angle adjustment module (3) comprises a central lower base (2-4), a central fixed-axis screw stepper motor (3-1), a motion axis (3-2), an upper shaft bracket (3-2-1), a power supply (2-3-1), and an angle control component (4); the central fixed-axis screw stepper motor (3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; the motion axis (3-2) is threadedly connected to the central fixed-axis screw stepper motor (3-1), and the upper shaft bracket (3-2-1) is welded to the outside of the motion axis (3-2); the power supply (2-3-1) is fixed to the lower surface of the central upper base (2-3) by bolts; the angle control component (4) consists of a control development board and a drive controller, and is fixed to the outside of the outer box by bolts.

7. The variable-angle flexible parabola antenna unrolling mechanism according to claim 6, characterized in that: The angle adjustment range of the angle adjustment module (3) is θ =[- , ] .

8. The variable-angle flexible parabola antenna unrolling mechanism according to claim 6, characterized in that: The movement displacement of the movement axis (3-2) is D. When the free end of the flexible extension arm is at a height of 0 When the flexible extension arm (1) rotates through an angle δ = .

9. The variable-angle flexible parabola antenna unrolling mechanism according to claim 1, characterized in that: The drive module (2-2) comprises six drive motors (2-2-1), a power supply (2-3-1), a central upper base (2-3), and a drive control component (5); the six drive motors (2-2-1) are connected in series and arranged in a regular hexagonal pattern on the upper surface of the central upper base (2-3) inside the box body; the power supply (2-3-1) is placed on the lower surface of the central upper base (2-3); the drive control component (5) consists of a control development board and a drive controller, and is fixed to the outside of the outer box body by bolts.

10. A method for controlling a variable-angle flexible parabolic antenna roll-up mechanism, characterized in that: A variable-angle flexible parabolic antenna unrolling mechanism according to any one of claims 1 to 9, comprising an unrolling control method and an angle control method, comprising the following steps: The unfolding control method is as follows: in the rolled-up state, after the wireless remote controller is activated, the driving control component (5) receives an electrical signal and drives the six series driving motors (2-2-1) to push out the screw rods at the same time, and the thrust of the screw rods acts on the six flexible extension arms (1). The six flexible extension arms (1) are immediately unfolded after receiving the thrust of the screw rods. After the six flexible extension arms (1) are unfolded, the driving control component (5) sends a command to the motor to stop moving, and the unfolding of the six flexible extension arms is completed; Angle control method: The angle adjustment module (3) is remotely controlled by wireless signals. After being started, the central fixed axis lead screw stepper motor (3-1) is driven by the angle control component (4), and the lead screw on the central fixed axis lead screw stepper motor (3-1) drives the motion axis (3-2) to move downward, and drives the six extension arms (1) to move upward through the lever (1-1) connected to the motion axis; when the flexible extension arm (1) reaches a preset height, the angle control component (4) sends a command to control the motor to stop moving; thereby, the six extension arms are deployed at different angles; thus, the deployment of a flexible roll-up antenna with a large telescopic ratio and a large angle can be realized.

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