A fiber-based mirror support structure

Abstract

This invention relates to a fiber-based mirror support structure, belonging to the field of space optomechanical structure support technology. It includes a mirror and several sets of fiber-based mirror support structure components. Several fiber bonding grooves are evenly distributed circumferentially on the sidewall of the mirror, with each fiber-based mirror support structure component corresponding to one of the fiber bonding grooves. Each set of fiber-based mirror support structure components includes carbon fiber filaments, a mounting base, and connecting bolts. The mounting base has a through hole at its center and end bonding grooves at its ends. The carbon fiber filaments are placed on the mounting base, and the ends of the carbon fiber filaments are bonded to the end bonding grooves of the mounting base using structural adhesive. The carbon fiber filament located at the through hole in the center of the mounting base is bonded to the fiber bonding grooves using structural adhesive. The mounting base is connected to the remote sensing camera body via connecting bolts. This invention significantly reduces the weight of the mirror assembly and, through the ultra-flexible properties of the carbon fiber filaments, significantly improves the stability of the mirror assembly.

Description

Technical Field

[0001] This invention belongs to the field of space optomechanical structure support technology, and relates to a fiber-based mirror support structure. Background Technology

[0002] Currently, the mirror support of typical space optical remote sensing cameras is achieved by directly bonding flexible metal structural components to the mirror. By machining special wire-cut grooves on the metal structural components, the flexibility of the support structure is improved, thereby reducing the impact of assembly stress and temperature fluctuation stress on the mirror.

[0003] Traditional flexible metal structure support schemes for reflectors typically involve a large weight in order to ensure the reflector's fundamental frequency and prevent it from being affected by vibration and impact during rocket launch. Furthermore, it is difficult to guarantee the reflector's positional stability after experiencing launch vibration and impact. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a fiber-based reflector support structure.

[0005] The solution of the present invention is:

[0006] A fiber-based mirror support structure includes a mirror and several sets of fiber-based mirror support structure components;

[0007] The sidewall of the reflector is evenly distributed with several fiber bonding grooves, and the fiber-based reflector support structure component corresponds one-to-one with the fiber bonding grooves.

[0008] Each set of fiber-based reflector support structure components includes carbon fiber filaments, a mounting base, and connecting bolts. The mounting base has a through hole machined in the center and an end bonding groove machined at the end. The carbon fiber filaments are placed on the mounting base, and the ends of the carbon fiber filaments are bonded to the end bonding grooves of the mounting base with structural adhesive. The carbon fiber filaments located at the through hole in the center of the mounting base are bonded to the fiber filament bonding grooves with structural adhesive. The mounting base is connected to the remote sensing camera body through connecting bolts.

[0009] Preferably, the sidewall of the reflector has several protrusions evenly distributed around its circumference, and fiber bonding grooves are machined on the protrusions. The central through hole of the mounting base is matched and installed on the protrusion of the sidewall of the reflector. The carbon fiber filament located at the central through hole is bonded to the fiber bonding groove on the protrusion by structural adhesive.

[0010] Preferably, the carbon fiber filaments, except for the ends and the bonding areas with the fiber filament bonding grooves, are cantilevered.

[0011] Preferably, the reflector adopts a lightweight design with a weight reduction rate of over 90%.

[0012] Preferably, the mounting base has a thin-walled structure with a wall thickness not exceeding 2mm.

[0013] Preferably, the overall support stiffness of the reflector assembly can be adjusted by changing the diameter of the carbon fiber filaments and the thickness of the structural adhesive.

[0014] Preferably, the mounting base is made of titanium alloy.

[0015] The beneficial effects of this invention compared to the prior art are:

[0016] This invention addresses small-aperture reflectors by proposing a fiber-based reflector support scheme that uses carbon fiber filaments to connect a metal support structure to the reflector, thereby significantly reducing the weight of the reflector assembly. At the same time, the ultra-flexible properties of carbon fiber filaments significantly improve the stability of the reflector assembly. Attached Figure Description

[0017] Figure 1 This is an assembly schematic diagram of a fiber-based reflector support structure according to the present invention;

[0018] Figure 2 This is a schematic diagram of the reflector structure in this invention;

[0019] Figure 3 This is a detailed schematic diagram of the fiber-based reflector support structure assembly of the present invention;

[0020] Figure 4 This is a detailed connection diagram of the fiber-based reflector support structure assembly of the present invention.

[0021] In the diagram: 1-Reflector, 2-Fiber-based reflector support structure assembly, 3-Fiber filament, 4-Mounting base, 5-Connecting bolt. Detailed Implementation

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] This invention utilizes carbon fiber bundles to directly connect the reflector to the main support structure, forming a highly lightweight and stable reflector assembly support structure.

[0024] The specific approach is as follows:

[0025] a. For a mirror blank, by processing fiber bundle adhesive grooves on the mirror structure body, and by utilizing structural characteristics such as cantilever and thin wall, a mirror structure with fiber bundle adhesive grooves that can realize the unloading of force and heat stress can be realized.

[0026] b. For the reflector support structure, a thin-walled shell structure with fiber bundle adhesive grooves is adopted, which significantly reduces the weight of the support while ensuring the support rigidity.

[0027] c. Using optical structural adhesive, carbon fiber bundles are bonded to the mirror blank and the mirror support structure respectively to achieve high stability support for the mirror.

[0028] like Figure 1 As shown, the present invention provides a fiber-based mirror support structure, including a mirror 1 and several sets of fiber-based mirror support structure components 2.

[0029] like Figure 2 As shown, multiple fiber bonding grooves are evenly distributed on the sidewall of reflector 1. Reflector 1 requires a highly lightweight design; generally, the weight reduction rate of the reflector needs to exceed 90% to ensure the overall support rigidity of the reflector assembly.

[0030] like Figure 3 As shown, the fiber-based reflector support structure assembly 2 consists of carbon fiber filaments 3, a mounting base 4, and connecting bolts 5. The mounting base 4 is connected to the remote sensing camera body via the connecting bolts 5. The specific design of the mounting base 4 is related to the relative position of the reflector and the remote sensing camera body. Generally, the mounting base 4 is designed as a thin-walled structure (wall thickness not exceeding 2mm) to ensure a high overall lightweight ratio of the reflector assembly. A through hole is machined in the center of the mounting base 4.

[0031] like Figure 4 As shown, the detailed internal connection relationship between the fiber-based reflector support structure assembly 2 and the reflector 1 is illustrated. Specifically, the carbon fiber filament 3 at the central through hole is bonded to the reflector 1 at its fiber filament bonding groove using structural adhesive. The carbon fiber filament 3 is also bonded to the four fiber filament bonding grooves at the end of the mounting base 4 using structural adhesive. The mounting base 4 is then connected to the camera body via connecting bolts 5, thus completing the support and fixation of the reflector. The overall support stiffness of the reflector assembly can be adjusted by adjusting the diameter of the carbon fiber filament 3 and the thickness of the structural adhesive. Since the mass ratio of the carbon fiber filament 3 and the structural adhesive is extremely small, the overall weight of the reflector assembly is generally not affected during adjustment.

[0032] The mounting base is made of titanium alloy.

[0033] Example:

[0034] This embodiment provides a fiber-based mirror support structure, including a mirror 1 and three sets of fiber-based mirror support structure components 2.

[0035] like Figure 2 As shown, three protrusions are evenly distributed on the side wall of reflector 1, and fiber bonding grooves are machined on the protrusions. Reflector 1 needs to be designed for high lightweighting. Generally, the lightweighting rate of the reflector needs to exceed 90% to ensure the overall support rigidity of the reflector assembly.

[0036] like Figure 3As shown, the fiber-based reflector support structure assembly 2 consists of carbon fiber filaments 3, a mounting base 4, and connecting bolts 5. The mounting base 4 is connected to the remote sensing camera body via the connecting bolts 5. The specific design of the mounting base 4 is related to the relative positions of the reflector and the remote sensing camera body. In this embodiment, it is a cross-shaped structure with a through hole in the center and a connecting rod at the bottom. Generally, the mounting base 4 is designed as a thin-walled structure to ensure a high overall lightweight ratio of the reflector assembly.

[0037] like Figure 4 As shown, the detailed internal connection relationship between the fiber-based reflector support structure assembly 2 and the reflector 1 is illustrated. Specifically, the mounting base 4 is installed at the corresponding boss through its central through hole. The carbon fiber filament 3 is bonded to the reflector 1 at its fiber filament bonding groove using structural adhesive. The carbon fiber filament 3 is also bonded to the four fiber filament bonding grooves at the end of the mounting base 4 using structural adhesive. The mounting base 4 is then connected to the camera body via connecting bolts 5, thus completing the support and fixation of the reflector. The overall support stiffness of the reflector assembly can be adjusted by adjusting the diameter of the carbon fiber filament 3 and the thickness of the structural adhesive. Since the mass ratio of the carbon fiber filament 3 and the structural adhesive is extremely small, the overall weight of the reflector assembly is generally not affected during adjustment.

[0038] This invention addresses small-aperture reflectors by proposing a fiber-based reflector support scheme that uses carbon fiber filaments to connect a metal support structure to the reflector, thereby significantly reducing the weight of the reflector assembly. At the same time, the ultra-flexible properties of carbon fiber filaments significantly improve the stability of the reflector assembly.

[0039] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A fiber-based reflector support structure, characterized in that: Includes a reflector (1) and several sets of fiber-based reflector support structure components (2); The sidewall of the reflector (1) is evenly distributed with several fiber bonding grooves, and the fiber-based reflector support structure component (2) corresponds one-to-one with the fiber bonding grooves; Each fiber-based reflector support structure assembly (2) includes a carbon fiber filament (3), a mounting base (4), and connecting bolts (5). The mounting base (4) has a through hole in the center and an end bonding groove in the end. The carbon fiber filament (3) is placed on the mounting base, and the end of the carbon fiber filament (3) is bonded to the end bonding groove of the mounting base (4) with structural adhesive. The carbon fiber filament located at the through hole in the center of the mounting base (4) is bonded to the fiber filament bonding groove with structural adhesive. The mounting base (4) is connected to the remote sensing camera body through the connecting bolts (5).

2. The fiber-based reflector support structure according to claim 1, characterized in that: Several protrusions are evenly distributed around the side wall of the reflector. Fiber bonding grooves are machined on the protrusions. The central through hole of the mounting base (4) is matched and installed on the protrusion of the side wall of the reflector (1). The carbon fiber filament (3) located at the central through hole is bonded to the fiber bonding groove on the protrusion by structural adhesive.

3. The fiber-based mirror support structure according to claim 1, characterized in that: Except for the ends and the bonding grooves with the fiber filaments, the rest of the carbon fiber filaments are cantilevered.

4. The fiber-based reflector support structure according to claim 1, characterized in that: The reflector features a lightweight design with a weight reduction rate exceeding 90%.

5. The fiber-based reflector support structure according to claim 1, characterized in that: The mounting base has a thin-walled structure with a wall thickness not exceeding 2mm.

6. The fiber-based reflector support structure according to claim 1, characterized in that: The overall support stiffness of the reflector assembly can be adjusted by changing the diameter of the carbon fiber filaments and the thickness of the structural adhesive.

7. The fiber-based reflector support structure according to claim 1, characterized in that: The mounting base is made of titanium alloy.

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