A rollable solar wing deployment rod component microgravity simulation device and method

Abstract

The microgravity simulation device for the roll-type solar wing stretching rod component and the method comprise a fixing tool, a hanging tool, an air floating tool and an air foot. The fixing tool is used for fixing the beam assembly of the roll-type solar wing stretching rod component and keeping it unmoved during the unfolding and folding processes. The hanging tool is used for hanging the roll-type solar wing stretching rod component, with the upper end connected with the supporting assembly and the lower end connected with the air floating tool. The air floating tool is used for connecting the hanging tool and the air foot. The air foot floats on the assembling platform after being ventilated and is used for keeping the movement of the roll-type solar wing stretching rod component in a frictionless state. The present application solves the precision control of the gravity unloading of the moving reel and the repeated folding precision during the unfolding and folding test processes of the roll-type solar wing stretching rod component, and improves the assembling precision of the roll-type solar wing stretching rod component and the accuracy of the microgravity simulation test process.

Description

Technical Field

[0001] This invention belongs to the field of ground-based experimental simulation of complex spacecraft products, specifically relating to a microgravity simulation device and method for a roll-up solar wing extension rod component. Background Technology

[0002] With the development of space technology, spacecraft are increasingly demanding higher power outputs. Future spacecraft will require tens or even hundreds of kilowatts of power. If currently mature rigid or semi-rigid solar arrays are used, the unfolded area of ​​a single wing would need to reach hundreds of square meters. The folded volume and overall mass of the solar arrays would inevitably fail to meet the requirements of future spacecraft solar array envelope dimensions, launch payloads, and unfolded stiffness. Therefore, China has begun developing more advanced rollable solar arrays.

[0003] Rollable solar arrays offer advantages over traditional rigid and semi-rigid solar arrays, including smaller folded envelope, lighter weight, and higher power-to-weight ratio, making them a future trend for ultra-high-power spacecraft. A single rollable solar array can be less than 1mm thick, allowing it to be wound like paper onto a spool for complete compression. Its folded volume can be reduced by more than 90% compared to a similar rigid solar array. However, the thinness, large size, and large quantity of rollable solar arrays significantly increase the difficulty of deployment in ground-based microgravity simulations and place higher demands on the microgravity simulation process.

[0004] For large-sized rollable solar array products, assembly or engineering testing on the ground presents challenges. Due to the large size and low rigidity of the components, they are prone to structural deformation under gravity. This not only fails to accurately reflect the product's actual condition in the microgravity environment of space but also risks structural damage to lightweight, large components, potentially leading to safety accidents. Therefore, during the assembly or engineering testing of large-sized rollable solar array products for spacecraft on the ground, appropriate gravity unloading devices are required to balance the gravitational effects on the components and simulate the specific technical state of these structures under microgravity conditions.

[0005] Large-size rollable solar arrays belong to the emerging field of spacecraft technology. Compared with traditional deployable mechanisms, they have a smaller folded volume and greater expandability. Solar array products utilize lightweight materials and components, resulting in complex mechanical structures and multi-degree-of-freedom motion characteristics. Therefore, the gravity unloading mechanism during the deployment process of large-size rollable solar arrays requires a relatively complex motion process. Currently, the commonly used gravity unloading technology for traditional deployable mechanisms leads to complex structures, high costs, low gravity unloading efficiency, and inconvenient operation. Therefore, designing and developing a matching multi-degree-of-freedom gravity unloading mechanism for the structural characteristics and motion characteristics of large-size rollable solar arrays to achieve efficient gravity unloading capabilities during complex space motion is a highly challenging engineering problem in the field of spacecraft manufacturing technology, and it is also of great significance. Summary of the Invention

[0006] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a microgravity simulation device and method for a rollable solar wing extender rod component, so as to achieve high-precision assembly and accurate microgravity simulation of the rollable solar wing extender rod component.

[0007] The technical solution of this invention is: a microgravity simulation device for a rollable solar wing extender component, comprising: a fixing fixture, a hanging fixture, an air-bearing fixture, and an air foot; the fixing fixture is used to fix the crossbeam assembly of the rollable solar wing extender component, keeping it stationary during unfolding and retraction; the hanging fixture is used to suspend the rollable solar wing extender component, with its upper end connected to the support assembly of the rollable solar wing extender component and its lower end connected to the air-bearing fixture; the air-bearing fixture is used to connect the hanging fixture and the air foot; the air foot floats on the assembly platform after being ventilated, so that the movement of the rollable solar wing extender component is in a frictionless state.

[0008] A method for simulating microgravity of a rollable solar array extender component using the aforementioned device, comprising:

[0009] Install the support assembly onto the crossbeam assembly of the roll-up solar panel extender rod component, and then install the crossbeam assembly and the support assembly onto the fixture.

[0010] Install the tensioning device of the roll-type solar wing extender component on the roll assembly to ensure that the pressure of the tensioning device meets the requirements;

[0011] The extension rod of the coiled solar array extension rod component is wound around the reel assembly;

[0012] Install the extension rod, reel assembly, and tensioning device on the air flotation fixture. The extension rod is installed together with the support assembly to ensure that the axis of the reel assembly is parallel to the side of the support assembly.

[0013] Microgravity simulations were conducted to deploy and retract the rollable solar wing extender component.

[0014] During the installation of the support assembly onto the crossbeam assembly of the roll-up solar wing extender, the relative positions of the support assembly and the crossbeam assembly are measured in real time to ensure that the short side of the support assembly is perpendicular to the long side of the crossbeam assembly.

[0015] After installing the crossbeam assembly and support assembly onto the fixed fixture, use a laser tracker to measure the side of the crossbeam assembly that connects to the support assembly. Adjust the crossbeam assembly so that the side of the crossbeam assembly is parallel to the mounting surface of the fixed fixture and perpendicular to the air-floating platform. Use a laser tracker to measure the angle between the side of the crossbeam assembly and the air-floating platform to ensure perpendicularity.

[0016] When installing the tensioning device of the roll-type solar wing extender rod component onto the roll assembly, the tensioning device and the roll assembly are connected by screws and adhesive. The roller bracket adhesive ring of the tensioning device is bonded to the bottom shaft of the extender rod. During bonding, the roller bracket base is fixed to the extender rod for positioning. The pressure of the rollers on both sides of the tensioning device is adjusted to maintain consistency.

[0017] The process of winding the extension rod of the rollable solar panel extension rod component onto the roll assembly includes: placing the left end of the extension rod on the roll assembly, adjusting the tension of the tensioning device to meet the requirements, ensuring that the extension rod is tightly attached to the roll assembly; measuring the axis of the extension rod with a laser tracker to ensure that the axis of the extension rod is perpendicular to the axis of the roll assembly; installing the retracting fixture on the extension rod, adjusting the tilt angle and height of the retracting fixture to ensure that the tilt angles at both ends of the retracting fixture are consistent, so that the retracting fixture contacts the extension rod but is not under force; then winding the extension rod onto the roll assembly, constantly checking the overlap of each turn at both ends of the extension rod during the winding process to ensure that each layer of the extension rod is kept flush; during the retracting process, to avoid interference between the extension rod tensioning device and the unfolding / retracting fixture, rotating the extension rod tensioning device by a certain angle to avoid interference; checking the position of the extension rod winding after each turn to ensure that both ends of the extension rod coincide with the marked position of the previous turn, and completely retracting the extension rod onto the roll assembly.

[0018] During the microgravity simulation deployment of the roll-up solar array extension rod component, a support fixture is placed under the extension rod every 1 meter during deployment to ensure support and protection for the extension rod during deployment and prevent bending due to gravity over long distances. During deployment, the deployment speed and trajectory are controlled to avoid damage to the product.

[0019] During the microgravity simulation of retracting the roll-type solar wing extender rod component, the position of the extender rod is checked after each turn to ensure that both ends of the extender rod coincide with the marked position of the previous turn, and the extender rod is completely retracted into the roll assembly. During the retraction process, the retraction fixture is installed on the extender rod, and the tilt angle and height of the retraction fixture are adjusted to ensure that the tilt angles of both ends of the retraction fixture are consistent, so that the retraction fixture contacts the extender rod but is not subjected to force. Then the extender rod is wound around the roll assembly, and the overlap of each turn of the extender rod at both ends is checked at all times during the winding process to ensure that each layer of the extender rod is kept flush.

[0020] The advantages of this invention compared to the prior art are:

[0021] (1) When assembling the roll-type solar wing extender rod with the roll, the extender rod needs to be wound around the roll. During the winding process, the center line of the extender rod will not be perpendicular to the center line of the roll, which will affect the final deployment accuracy of the extender rod. In this invention, a retracting fixture is installed on the extender rod, and the tilt angle and height of the retracting fixture are adjusted to ensure that the tilt angles at both ends of the retracting fixture are consistent, thereby improving the final deployment accuracy of the extender rod.

[0022] (2) During the extension and retraction test, if the extended length of the extension rod exceeds 10m, even a slight deviation in the angle between the centerline of the extension rod and the centerline of the root crossbeam will cause a large offset at the end of the extension rod. This invention rotates the tensioning device of the extension rod by a certain angle to avoid this deviation. The position of the extension rod winding is checked after each retraction to ensure that both ends of the extension rod coincide with the marked position of the previous retraction, thus reducing the deviation at the end of the extension rod.

[0023] (3) The roll-up solar panel extension rod is a C-shaped rod, which is prone to deformation. During the extension and retraction test, the roll needs to move continuously, and the center of gravity and weight of the roll are constantly changing. After the extension is completed, the position of the bottom shaft of the roll is offset by about 0.21° in the horizontal direction from the retracted state, making it difficult to control the gravity unloading accuracy of the roll. The method of this invention places an extension rod support fixture under the extension rod for every 1m of extension, ensuring that the extension rod is supported and protected during the extension process, preventing the extension rod from bending due to gravity during long-distance extension, and improving the gravity unloading accuracy of the roll.

[0024] (4) During the extension rod unfolding and rewinding test, the extension rod needs to be repeatedly unfolded and rewound onto the reel. Due to the difficulty in controlling the perpendicularity between the extension rod's centerline and the reel's centerline, the position, tension, and perpendicularity of the extension rod are easily different each time it is wound, causing changes in the extension rod's unfolding direction accuracy. This invention uses a method of checking the position of the extension rod after each turn to ensure that both ends of the extension rod coincide with the marked position of the previous turn, completely retracting the extension rod onto the reel assembly. During the retraction process, a retraction fixture is installed on the extension rod, and the tilt angle and height of the retraction fixture are adjusted to ensure that the tilt angles at both ends of the retraction fixture are consistent, so that the retraction fixture contacts the extension rod but is not subjected to force. Then, the extension rod is wound onto the reel assembly. During the winding process, the overlap of each turn at both ends of the extension rod is constantly checked to ensure that each layer of the extension rod is kept flush, avoiding significant changes in the extension rod's direction accuracy.

[0025] (5) This invention solves the technical problems of assembly accuracy control of the extension rod and root beam and the reel during the assembly process of the roll-type solar wing extension rod component, the unfolding direction accuracy control of the extension rod after assembly, the gravity unloading accuracy control of the moving reel during the unfolding and retraction test, the repeated retraction accuracy control of the extension rod during the unfolding and retraction test, and the synchronization control of the unfolding of the left and right extension rods, thereby improving the assembly accuracy of the roll-type solar wing extension rod component and the accuracy of the microgravity simulation test process. Attached Figure Description

[0026] Figure 1 Schematic diagram of the components of a roll-up solar panel extender rod;

[0027] Figure 2 Schematic diagram of the microgravity simulation tooling for the roll-up solar wing extender rod component;

[0028] Figure 3 Schematic diagram of microgravity simulation showing the synchronous deployment of the roll-up solar array extension rod components;

[0029] Figure 4 Schematic diagram of the tooling connecting the two extension rod components of the roll-up solar panel. Detailed Implementation

[0030] The microgravity simulation device and method for the roll-up solar wing extender rod component of the present invention will be described in detail below with reference to the accompanying drawings. These descriptions are merely illustrative and are not intended to limit the scope of protection of the present invention in any way.

[0031] Figure 1This is a schematic diagram of the components of a rollable solar wing extender. The rollable solar wing extender mainly consists of an extender (1), a roll assembly (2), a tensioning device (3), a crossbeam assembly (4), and a support assembly (5). The extender is wound around the roll assembly, with a straight cross-section; when unfolded, its cross-section is C-shaped. The roll assembly and the crossbeam assembly are located at opposite ends of the rollable solar wing extender, providing rigid support. The tensioning device ensures the extender is pressed tightly against the roll assembly, the crossbeam assembly secures the rollable solar wing extender to the celestial body, and the support assembly connects the crossbeam assembly and the roll assembly.

[0032] Figure 2 This is a schematic diagram of the microgravity simulation device for the rollable solar wing extender component. The microgravity simulation fixture includes a fixed fixture 6, a hanging fixture 7, an air-bearing fixture 8, and an air foot 9. The fixed fixture is used to fix the crossbeam assembly of the rollable solar wing extender component, keeping it stationary during deployment and retraction. The hanging fixture is used to suspend the rollable solar wing extender component, with its upper end connected to the support assembly and its lower end connected to the air-bearing fixture. The air-bearing fixture connects the hanging fixture and the air foot. After being ventilated, the air foot floats on the assembly platform, ensuring that the movement of the rollable solar wing extender component is frictionless.

[0033] (1) Install the support components onto the beam components.

[0034] During installation, measure the relative positions of the support components and the crossbeam components to ensure the perpendicularity of the short side of the support components to the long side of the crossbeam components.

[0035] (2) Install the beam assembly and support assembly onto the fixed fixture.

[0036] First, install the fixture onto the air-float platform. Adjust the fixture and use a laser tracker to measure the angle between the side of the fixture and the air-float platform, ensuring the perpendicularity of the fixture's side to the platform. Next, install the crossbeam assembly onto the fixture. Use a laser tracker to measure the angle between the crossbeam assembly and the support assembly's side. Adjust the crossbeam assembly so that its side is parallel to the fixture's mounting surface and perpendicular to the air-float platform. Again, use a laser tracker to measure the angle between the crossbeam assembly's side and the air-float platform, ensuring perpendicularity.

[0037] (3) Install the tensioning device on the reel assembly and ensure that the pressure of the tensioning device meets the requirements.

[0038] The tensioning device and the reel assembly are connected by a combination of screws and adhesive. The roller bracket of the tensioning device is also bonded to the bottom shaft of the extension rod. During bonding, the roller bracket base is fixed to the extension rod for positioning. The pressure of the rollers on both sides of the tensioning device is adjusted to maintain consistency.

[0039] (4) Install the extension rod onto the reel assembly to ensure that the extension rod is accurately wound around the reel assembly.

[0040] Place the left end of the extension rod on the reel assembly and adjust the tension of the tensioning device to meet the requirements, ensuring the extension rod is tightly fitted to the reel assembly. Use a laser tracker to measure the axis of the extension rod, ensuring it is perpendicular to the axis of the reel assembly. Install the gathering fixture onto the extension rod, adjusting its tilt angle and height to ensure both ends are tilted at the same angle, allowing the fixture to contact the extension rod without exerting force. Then, wind the extension rod around the reel assembly, constantly monitoring the overlap of each turn to ensure each layer is aligned. During the gathering process, to avoid interference between the C-shaped extension rod tensioning device and the winding fixture, rotate the C-shaped tensioning device by a certain angle. After each turn, check the position of the winding, ensuring both ends coincide with the marked position of the previous turn, and completely gather the extension rod onto the reel assembly.

[0041] (5) Components such as extension rods, reel assemblies, and tensioning devices are installed on the air flotation fixture.

[0042] During installation, components such as the extension rod, reel assembly, and tensioning device are fixed together and then installed on the air-floating fixture. A laser tracker is used to measure the axis of the reel assembly and adjust it to be perpendicular to the air-floating platform.

[0043] (6) Install the extension rod and the support assembly together to ensure that the axis of the reel assembly is parallel to the side of the support assembly.

[0044] Place the extension rod, reel assembly, tensioning device, and air-floating fixture on the air-floating platform. Align the extension rod with the leveling block placed underneath it and the support assembly. Adjust the position of the extension rod and use a laser tracker to measure the axis of the reel assembly, ensuring that the axis of the reel assembly is parallel to the side of the support assembly. Then, secure the extension rod to the support assembly. Next, install the clamps, pressure seats, and pressure release device to complete the assembly of the extension rod section.

[0045] (7) Microgravity simulation deployment of the roll-up solar wing extender component

[0046] Unlock the right extension section to allow the extension rod to unfold on the air-float platform. Once in place, measure the straightness and position of the unfolded rod to ensure they meet requirements. During the unfolding process, place an extension rod support fixture under the extension rod every 1 meter to ensure support and protection, preventing bending due to gravity over long unfolding distances. Control the unfolding speed and trajectory during the process to avoid damage to the product. After unfolding to the desired position, measure the straightness of the extension rod axis, the parallelism between the axis and the air-float platform, and the length of the extension rod.

[0047] (8) Microgravity simulation of retraction of the roll-up solar wing extender component

[0048] The extension rod is gathered using a gathering fixture. During the gathering process, to avoid interference between the C-shaped extension rod tensioning device and the gathering fixture, the C-shaped extension rod tensioning device can be rotated at a certain angle to avoid interference. The position of the extension rod is checked after each turn to ensure that both ends of the extension rod coincide with the marked position of the previous turn, and the extension rod is completely gathered onto the reel assembly. During the gathering process, the gathering fixture is installed on the extension rod, and the tilt angle and height of the gathering fixture are adjusted to ensure that the tilt angles of both ends of the gathering fixture are consistent, so that the gathering fixture contacts the extension rod but is not under force. Then, the extension rod is wound onto the reel assembly. During the winding process, the overlap of each turn at both ends of the extension rod is constantly checked to ensure that each layer of the extension rod is kept flush.

[0049] (9) Simultaneous deployment and retraction test of two extension rods

[0050] Figure 3 This is a schematic diagram of a microgravity simulation of the synchronous deployment of the roll-up solar wing extender component. The synchronous deployment microgravity simulation fixture includes a fixed fixture 6, an extender support fixture 10, a roll support fixture 11, and an air foot 9. The fixed fixture is used to fix the crossbeam assembly of the roll-up solar wing extender component, keeping it stationary during deployment and retraction. The extender support fixture is used to support the extended rod after deployment, ensuring that the extended rod will not deform under the influence of gravity. The roll support fixture is used to support the roll assembly, connected to both ends of the roll assembly at the top and to the air foot at the bottom. After being ventilated, the air foot floats on the assembly platform, ensuring that the movement of the roll-up solar wing extender component is frictionless. Figure 4 This is a schematic diagram of the tooling connecting the two extension rod components of a roll-up solar panel. Figure 3 The right view shows the connecting fixture 12 between the two roller support fixtures.

[0051] Microgravity unfolding and retraction tests were conducted on the two extension rods using an air-float method. If the roll center is required to remain horizontal, the extension rods will tilt upwards by 0.21° after unfolding; an air-float support scheme is feasible in this case. The extension rods are supported and protected by extension rod support fixtures to prevent bending due to gravity during long-distance unfolding. The extension rod support fixtures are gradually placed under the extension rods during roll unfolding, one fixture per meter as required, with nine fixtures needed for each extension rod, for a total of 18 fixtures.

[0052] The reel is mounted on a reel support fixture, with a tensioning device connected at one end via an M12 threaded hole and at the other end via a φ5.5 hole; bearings are installed at both ends to ensure frictionless rotation of the reel. There are four air-supported feet at the bottom. The length of the reel support fixture along the extension rod direction must ensure both the minimum retraction state of the extension rod and the ability to withstand the maximum torque of the extension rod. To verify the synchronicity of the left and right extension rods, a connecting fixture is installed in the middle of the reel support fixture instead of the reel-type solar panel. Similarly, the root crossbeam section is connected in the middle using a root crossbeam connecting fixture.

[0053] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention based on the above-disclosed technical content without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A method for microgravity simulation of a rollable solar wing extender component, wherein the rollable solar wing extender component includes an extender, a roll assembly, a tensioning device, a crossbeam assembly, and a support assembly; the extender is wound around the roll assembly, with a straight cross-section; after unfolding, the cross-section is C-shaped; the roll assembly and the crossbeam assembly are located at opposite ends of the rollable solar wing extender component, providing rigid support; the tensioning device ensures that the extender is pressed against the roll assembly; the crossbeam assembly fixes the rollable solar wing extender component to a celestial body; and the support assembly connects the crossbeam assembly and the roll assembly. It also relates to a microgravity simulation device for a rollable solar wing extender rod component, comprising: Fixed fixtures, hanging fixtures, air flotation fixtures, and air supply; The fixing fixture is used to fix the crossbeam assembly of the rollable solar wing extender component, keeping it stationary during deployment and retraction; the hanging fixture is used to hang the rollable solar wing extender component, with its upper end connected to the support assembly of the rollable solar wing extender component and its lower end connected to the air-float fixture; the air-float fixture is used to connect the hanging fixture and the air foot; after the air foot is ventilated, it floats on the assembly platform to ensure that the movement of the rollable solar wing extender component is in a frictionless state; Its features include: The support assembly of the coiled solar array extender rod is mounted on the crossbeam assembly of the coiled solar array extender rod, and the crossbeam assembly and the support assembly are mounted on the fixture. Install the tensioning device of the roll-type solar wing extender component on the roll assembly to ensure that the pressure of the tensioning device meets the requirements; The extension rod of the coiled solar array extension rod component is wound around the reel assembly; Install the extension rod, reel assembly, and tensioning device on the air flotation fixture. The extension rod is installed together with the support assembly to ensure that the axis of the reel assembly is parallel to the side of the support assembly. Microgravity simulations were conducted to deploy and retract the rollable solar wing extender component.

2. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, During the process of installing the support assembly of the rollable solar wing extender rod onto the crossbeam assembly of the rollable solar wing extender rod, the relative positions of the support assembly and the crossbeam assembly are measured in real time to ensure that the short side of the support assembly is perpendicular to the long side of the crossbeam assembly.

3. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, After installing the crossbeam assembly and support assembly onto the fixed fixture, use a laser tracker to measure the side of the crossbeam assembly that connects to the support assembly. Adjust the crossbeam assembly so that the side of the crossbeam assembly is parallel to the mounting surface of the fixed fixture and perpendicular to the air-floating platform. Use a laser tracker to measure the angle between the side of the crossbeam assembly and the air-floating platform to ensure perpendicularity.

4. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, When installing the tensioning device of the roll-type solar wing extender rod component onto the roll assembly, the tensioning device and the roll assembly are connected by screws and adhesive. The roller bracket adhesive ring of the tensioning device is bonded to the bottom shaft of the extender rod. During bonding, the roller bracket base is fixed to the extender rod for positioning. The pressure of the rollers on both sides of the tensioning device is adjusted to maintain consistency.

5. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, The process of winding the extension rod of the rollable solar panel extension rod component onto the roll assembly includes: placing the left end of the extension rod on the roll assembly, adjusting the tension of the tensioning device to meet the requirements, ensuring that the extension rod is tightly attached to the roll assembly; measuring the axis of the extension rod with a laser tracker to ensure that the axis of the extension rod is perpendicular to the axis of the roll assembly; installing the retracting fixture on the extension rod, adjusting the tilt angle and height of the retracting fixture to ensure that the tilt angles at both ends of the retracting fixture are consistent, so that the retracting fixture contacts the extension rod but is not under force; then winding the extension rod onto the roll assembly, constantly checking the overlap of each turn at both ends of the extension rod during the winding process to ensure that each layer of the extension rod is kept flush; during the retracting process, to avoid interference between the extension rod tensioning device and the unfolding / retracting fixture, rotating the extension rod tensioning device by a certain angle to avoid interference; checking the position of the extension rod winding after each turn to ensure that both ends of the extension rod coincide with the marked position of the previous turn, and completely retracting the extension rod onto the roll assembly.

6. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, During the microgravity simulation deployment of the roll-up solar array extension rod component, a support fixture is placed under the extension rod every 1 meter during deployment to ensure support and protection for the extension rod during deployment and prevent bending due to gravity over long distances. During deployment, the deployment speed and trajectory are controlled to avoid damage to the product.

7. The method for microgravity simulation of a roll-up solar wing extender rod component according to claim 1, characterized in that, During the microgravity simulation of retracting the roll-type solar wing extender rod component, the position of the extender rod is checked after each turn to ensure that both ends of the extender rod coincide with the marked position of the previous turn, and the extender rod is completely retracted into the roll assembly. During the retraction process, the retraction fixture is installed on the extender rod, and the tilt angle and height of the retraction fixture are adjusted to ensure that the tilt angles of both ends of the retraction fixture are consistent, so that the retraction fixture contacts the extender rod but is not subjected to force. Then the extender rod is wound around the roll assembly, and the overlap of each turn of the extender rod at both ends is checked at all times during the winding process to ensure that each layer of the extender rod is kept flush.

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