A two-dimensional turntable for a ground satellite simulator

Abstract

The application relates to a two-dimensional rotary table for a ground satellite simulator, wherein a rolling frame is arranged in a driven frame, a cross shaft is arranged in the rolling frame, first bearings are arranged on the two sides of the inside of the driven frame, the two ends of a first rotating shaft of the cross shaft respectively extend out of the back of the rolling frame and are supported through the first bearings, a first brake assembly for limiting the rotation of the first rotating shaft is arranged in the inside of the driven frame, second bearings are arranged at the two ends of the rolling frame, the two ends of a second rotating shaft of the cross shaft are respectively supported through the second bearings, a second brake assembly for limiting the rotation of the second rotating shaft is arranged in the inside of one end of the rolling frame, an installation plate is arranged on the upper end of the driven frame, a reset assembly is arranged on the installation plate, a reset rod is arranged on the upper side of the rolling frame, passes through the installation plate and is reset through the reset assembly, the satellite simulator is installed on the rolling frame, and the driven frame is arranged in an equipment unit frame in a lifting mode. The structural design of the application can reduce the friction resistance moment and can better realize the rolling, yaw and other simulation of the satellite simulator.

Description

Technical Field

[0001] This invention relates to the field of space ground simulation experiments, specifically a two-dimensional turntable for a ground satellite simulator. Background Technology

[0002] With the continuous development of aerospace technology, various advanced and complex technologies are constantly being applied to satellite systems. New microsatellites or satellite modules require intelligence, agility, reliability, and multifunctionality. Furthermore, various sensors, guidance and navigation control devices, electronic equipment, power systems, and propulsion systems on the satellite must operate normally and stably to enable the satellite to detect, track, lock onto, and rendezvous with its target. Due to the difficulty of space missions and the complexity of the spacecraft's structure, rigorous ground testing of these control devices and corresponding orbit and attitude control algorithms is essential before entering space. The ideal ground testing environment simulates the free motion of satellites and other spacecraft in space as closely as possible. However, due to the vacuum and weightlessness of the outer space environment, simulating the microgravity and micro-torque constraints of space on the ground is extremely difficult. Therefore, when repeatedly evaluating, simulating, and testing satellites on the ground, a verification platform is needed that meets the requirements for satellite dynamics, kinematics, interface verification, and key technology validation. The ground satellite simulator is a crucial component of the ground testing and verification system, primarily used to represent the state of the space segment and conduct full-system testing and verification tasks.

[0003] To ensure the credibility of experimental verification results, the key technical indicators of the satellite simulator must be consistent with those of the real satellite. Simultaneously, to facilitate the testing and verification of various new technologies and systems, the satellite simulator must be flexible and configurable. Satellites in space can achieve six degrees of freedom of motion (three translational degrees of freedom and three rotational degrees of freedom). Currently, the main methods for ground testing of satellites and other spacecraft are as follows: First, using drop towers or the parabolic motion of aircraft to simulate the microgravity environment of space through free fall. However, due to the extremely short duration (only tens of seconds) and the highly specialized equipment and methods, this method cannot be widely applied and is not very meaningful for ground testing of spacecraft. Second, underwater testing, using the buoyancy of water to obtain a microgravity testing environment. This is very helpful for training astronauts to operate in a weightless environment, but satellites and other spacecraft have numerous electronic devices and are not suitable for testing while completely immersed in water. Third, using suspension devices to suspend objects so that gravity does not affect their physical properties, achieving a balance of gravity. However, this method is also subject to many limitations and is inconvenient to use.

[0004] In the six-degree-of-freedom motion simulation of ground satellite simulators, the simulation of roll, yaw and other degrees of freedom is particularly difficult due to factors such as frictional torque between components, and existing equipment is unable to meet the simulation requirements. Summary of the Invention

[0005] The purpose of this invention is to provide a two-dimensional turntable for a ground satellite simulator. Its cross axis and related structural design can effectively reduce frictional resistance torque, thereby achieving better simulation effects of degrees of freedom such as roll and yaw in the satellite simulator.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A two-dimensional turntable for a ground satellite simulator includes a cross shaft, a rolling frame, a driven frame, a braking assembly, and a reset assembly. The rolling frame is located within the driven frame, and the cross shaft is located within the rolling frame. First bearings are provided on both sides of the driven frame. The cross shaft, along the BB axis, extends from both ends of a first rotating shaft that is supported by the corresponding first bearings. A first braking assembly, limiting the rotation of the first rotating shaft, is provided within the driven frame. Second bearings are provided at both ends of the rolling frame along the AA axis. The cross shaft, along the AA axis, is supported at both ends of a second rotating shaft that is supported by the corresponding second bearings. A second braking assembly, limiting the rotation of the second rotating shaft, is provided within the rolling frame. A mounting plate is provided at the upper end of the driven frame, and a reset assembly is provided on the mounting plate. A reset rod is provided on the upper side of the rolling frame, passing through the mounting plate, and the reset rod is reset by the reset assembly. The satellite simulator is mounted on the rolling frame, and the driven frame is vertically and flexibly mounted within a device unit frame.

[0008] The outer side of the first bearing and the outer side of the second bearing are provided with bearing caps and locking nuts. One end of the first rotating shaft of the cross shaft forms a first brake shaft end that cooperates with the first brake assembly, and one end of the second rotating shaft forms a second brake shaft end that cooperates with the second brake assembly.

[0009] The first brake assembly and the second brake assembly have the same structure, both including a brake frame and a brake cylinder, a first clamping block and a second clamping block disposed on the brake frame, wherein the second clamping block is fixed on the brake frame, and the first clamping block is driven to move by the brake cylinder to cooperate with the second clamping block.

[0010] The mounting plate has two sets of first reset components on the upper side and two sets of second reset components on the lower side. The first reset components and the second reset components have the same structure, each including a reset cylinder and an L-shaped reset plate. The L-shaped reset plate is slidably connected to the mounting plate and is driven to move by the reset cylinder. The moving direction of the reset cylinder in the first reset component is perpendicular to the moving direction of the reset cylinder in the second reset component.

[0011] The reset rod is yawed and reset by relative movement of the L-shaped reset plates in the two sets of first reset assemblies; the reset rod is rolled and reset by relative movement of the L-shaped reset plates in the two sets of second reset assemblies.

[0012] The mounting plate is provided with a reset slide rail, the reset cylinder is connected to the L-shaped reset plate through a connecting plate, and the lower side of the L-shaped reset plate is provided with a reset slider that cooperates with the reset slide rail on the corresponding side. The end of the reset slide rail away from the reset cylinder is provided with a limit seat, and the limit seat is provided with a limit screw.

[0013] The driven frame includes side frames on both sides, and each side frame includes an upper bracket and a lower bracket. The first bearing and the first brake assembly are both mounted on the corresponding lower bracket, and the two sides of the mounting plate are respectively fixedly connected to the corresponding upper bracket.

[0014] The side frame is provided with sliding components on both sides, which are slidably connected to the equipment unit frame. The sliding components include guide wheels and sliders.

[0015] The rolling frame includes a frame body, a connecting frame, and a flange. The two ends of the frame body are respectively fixed to the flanges on the corresponding sides through the connecting frame. The two ends of the frame body in the length direction are provided with second bearings. The middle of the upper side of the frame body is provided with a reset rod. The connecting frame on one side of the frame body is provided with a second brake assembly.

[0016] A first encoder for detecting roll angle is provided on one side of the driven frame, and a second encoder for detecting yaw angle is provided at either end of the roll frame.

[0017] The advantages and positive effects of this invention are as follows:

[0018] 1. The cross shaft and related structural design of the present invention can reduce the frictional resistance torque, thereby achieving better simulation effects of the satellite simulator's roll, yaw and other degrees of freedom. The roll frame rotates around the BB axis to simulate the roll degree of freedom of the satellite simulator, and rotates around the AA axis to simulate the yaw degree of freedom of the satellite simulator. The roll frame is installed in the driven frame, and the driven frame has sliding components on both sides that are slidably connected to the equipment unit frame, thereby simulating the rise and fall degree of freedom of the satellite simulator.

[0019] 2. This invention can measure the angles of roll and yaw degrees of freedom through the encoder, thereby realizing satellite attitude control. The first braking component and the second braking component of this invention stop the roll frame at a specified angle position, which also stops the satellite simulator at a specified angle position. This makes it convenient to cooperate with experiments such as verifying satellite attitude control strategies, space robotic arm trajectory planning, and end-effector image recognition algorithms.

[0020] 3. The reset component of this invention acts on the reset rod to reset the rolling frame and restore it to its initial zero position, facilitating repeated experiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0022] Figure 2 for Figure 1 The front view of the present invention,

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the present invention with the reset component and mounting plate removed.

[0024] Figure 4 for Figure 3 A schematic diagram of the cross-shaped shaft structure in the diagram.

[0025] Figure 5 for Figure 3 A schematic diagram of the rolling frame structure in the middle.

[0026] Figure 6 for Figure 3 A schematic diagram of the first brake assembly in the diagram.

[0027] Figure 7 for Figure 2 The main view of the reset component in the middle,

[0028] Figure 8 for Figure 7 Top view of the reset component.

[0029] Wherein, 1 is the cross shaft, 101 is the first brake shaft end, 102 is the second brake shaft end, 2 is the rolling frame, 201 is the reset rod, 202 is the flange, 203 is the frame body, 204 is the second bearing, 205 is the connecting frame, 206 is the second encoder, 207 is the first encoder, 3 is the driven frame, 301 is the lower bracket, 302 is the upper bracket, 303 is the mounting plate, 304 is the slider, 305 is the first bearing, 306 is the guide wheel, and 307 is the guide wheel. 41 is a vertical reset plate, 42 is a first reset assembly, 401 is a second reset assembly, 402 is a reset cylinder, 403 is an L-shaped reset plate, 404 is a reset slide rail, 405 is a connecting plate, 406 is a limit seat, 407 is a limit screw, 5 is a first brake assembly, 501 is a brake cylinder, 502 is a brake frame, 503 is a first clamping block, 504 is a second clamping block, 6 is a second brake assembly, 7 is a bearing cover, and 8 is a locking nut. Detailed Implementation

[0030] The invention will now be described in further detail with reference to the accompanying drawings.

[0031] like Figures 1-8 As shown, the present invention includes a cross shaft 1, a rolling frame 2, a driven frame 3, a braking assembly, and a reset assembly, wherein the rolling frame 2 is disposed within the driven frame 3, and the cross shaft 1 is disposed within the rolling frame 2, as shown. Figure 3 As shown, the driven frame 3 has first bearings 305 on both sides inside. The two ends of the first rotating shaft 1, which is arranged along the BB axis, extend out of the rolling frame 2 and are supported by the first bearings 305 on the corresponding sides. The driven frame 3 has a first brake assembly 5 that limits the rotation of the first rotating shaft. The two ends of the rolling frame 2, which is arranged along the AA axis, have second bearings 204. The two ends of the second rotating shaft 1, which is arranged along the AA axis, are supported by the second bearings 204 on the corresponding sides. Figure 2 As shown, a second brake assembly 6, which limits the rotation of the second shaft, is provided inside one end of the rolling frame 2. Figure 1 As shown, the driven frame 3 has a mounting plate 303 on its upper end, and a reset assembly is provided on the mounting plate 303. The rolling frame 2 has a reset rod 201 on its upper side that passes through the mounting plate 303, and the reset rod 201 is reset by the reset assembly, thereby resetting the rolling frame 2. The satellite simulator is mounted on the rolling frame 2, and the driven frame 3 is vertically and flexibly positioned within the equipment unit frame. In use, the movement of the rolling frame 2 and the driven frame 3 depends on the direction and magnitude of the external force acting on the satellite simulator connected to the rolling frame 2. The driven frame 3 simulates the vertical freedom of the satellite simulator, while... Figure 3 As shown, the rolling frame 2 rotates around the BB axis to simulate the roll degree of freedom of the satellite simulator, and rotates around the AA axis to simulate the yaw degree of freedom of the satellite simulator. The first brake assembly 5 and the second brake assembly 6 stop the rolling frame 2 at a specified angle position, which means that the satellite simulator stops at a specified angle position. The reset assembly acts on the reset rod 201 to reset the rolling frame 2 and restore it to the initial zero point position.

[0032] like Figure 4As shown, bearing caps 7 and locking nuts 8 are provided on the outer sides of the first bearing 305 and the second bearing 204 to achieve locking. Additionally, one end of the first rotating shaft of the cross shaft 1 forms a first brake shaft end 101 that mates with the first brake assembly 5, and one end of the second rotating shaft forms a second brake shaft end 102 that mates with the second brake assembly 6. Besides employing the cross shaft 1 structure, this invention also achieves low-friction two-dimensional rotation through high-precision, low-friction mechanical bearings. Generally, to reduce the frictional resistance of two-dimensional rotation, the bearing diameter should be reduced under a constant load; the smaller the bearing diameter, the lower the frictional resistance. However, due to the special application of the bearings in the simulator of this invention, which are subjected to stress in a simply supported beam state with a large load, they are prone to bending and deformation. Deformation can cause the bearings at both ends to become misaligned, increasing the frictional resistance torque. To overcome the above problems, this invention designs a cross shaft 1 structure, with each end of the cross shaft 1 employing self-aligning roller bearings and high-strength integrated bearing housings. The high-rigidity integrated bearing housings are precision-machined from high-strength aerospace aluminum, and the mounting holes on opposite sides are machined in a single cut to ensure coaxiality. The first and second rotating shafts of the cross shaft 1 possess high bending strength. This invention's cross shaft and related structural design can reduce frictional resistance torque while ensuring the dimensional accuracy of the rotation center and interface components. Under low-friction conditions, the movement of the rolling frame 2 and the driven frame 3 mainly depends on the direction and magnitude of the external force acting on the satellite simulator connected to the rolling frame 2, thereby achieving better simulation results.

[0033] like Figure 6 As shown, in this embodiment, the first brake assembly 5 and the second brake assembly 6 have the same structure, both including a brake frame 502 and a brake cylinder 501, a first clamping block 503 and a second clamping block 504 disposed on the brake frame 502. The second clamping block 504 is fixed on the brake frame 502, and the first clamping block 503 is driven to move by the brake cylinder 501 to cooperate with the second clamping block 504 to clamp the corresponding brake shaft end on the cross shaft 1.

[0034] like Figures 1-2 and Figures 7-8As shown, the mounting plate 303 has two sets of first reset components 41 on its upper side and two sets of second reset components 42 on its lower side. The first reset components 41 and the second reset components 42 have the same structure, each including a reset cylinder 401 and an L-shaped reset plate 402. The L-shaped reset plate 402 is slidably connected to the mounting plate 303 and is driven to move by the reset cylinder 401. The moving direction of the reset cylinder 401 in the first reset component 41 is perpendicular to the moving direction of the reset cylinder 401 in the second reset component 42. The mounting plate 303 has a through hole in the middle for the reset rod 201 to pass through. The relative movement of the L-shaped reset plates 402 in the two sets of first reset components 41 drives the reset rod 201 to return to the intermediate state to achieve yaw reset. The relative movement of the L-shaped reset plates 402 in the two sets of second reset components 42 drives the reset rod 201 to return to the intermediate state to achieve roll reset, thereby restoring the reset rod 201 to the zero position.

[0035] like Figures 7-8 As shown, in this embodiment, the mounting plate 303 is provided with a reset slide rail 404, the reset cylinder 401 is connected to the L-shaped reset plate 402 through a connecting plate 405, and the lower side of the L-shaped reset plate 402 is provided with a reset slider 403 that cooperates with the reset slide rail 404 on the corresponding side.

[0036] like Figure 8 As shown, the reset slide rail 404 is provided with a limiting seat 406 at the end away from the reset cylinder 401, and the limiting seat 406 is provided with a limiting screw 407 that abuts against the L-shaped reset plate 402 on the corresponding side to limit its displacement. The head end of the limiting screw 407 is provided with a washer that contacts the L-shaped reset plate 402.

[0037] like Figures 1-8 As shown, the driven frame 3 includes side frames on both sides, and each side frame includes an upper support 302 and a lower support 301, wherein... Figure 3 As shown, the bearing housing of the first bearing 305 and the first brake assembly 5 are both mounted on the corresponding lower bracket 301, as... Figure 1 As shown, the mounting plate 303 is fixedly connected to the corresponding upper bracket 302 on both sides. The upper bracket 302 and the mounting plate 303 mainly support the reset assembly, and the lower bracket 301 mainly supports the rolling frame 2 and the cross shaft 1. The structural design of the upper bracket 302 and the lower bracket 301 facilitates disassembly and assembly.

[0038] like Figures 1-3As shown, a sliding assembly is provided on the outer side of the side frame, which is slidably connected to the equipment unit frame. In this embodiment, the sliding assembly includes a guide wheel 306 and a slider 304. The guide wheel 306 is provided on one side of the side frame, and the slider 304 is provided on the other side, with the guide wheels 306 on different side frames arranged diagonally. The equipment unit frame is provided with a guide rail that cooperates with the guide wheel 306 and a slide rail that cooperates with the slider 304. The design of the sliding assembly can achieve a good simulation effect of lifting freedom.

[0039] like Figures 1-3 As shown, a vertical reset plate 307 is provided on the outer side of the lower support 301. A fixed guide wheel is provided on the upper side of the equipment unit frame for resetting the lifting freedom. Since the satellite simulator is mainly fixed to the rolling frame 2, the vertical reset plate 307 and the fixed guide wheel are connected by a suspension rope. The suspension rope passes around the fixed guide wheel and is connected to a drive device (such as a winch). This can achieve the purpose of resetting the driven frame 3, that is, to reset the lifting freedom of the satellite simulator.

[0040] like Figure 3 and Figure 5 As shown, the rolling frame 2 includes a frame body 203, a connecting frame 205, and a flange 202. Both ends of the frame body 203 are fixed to the corresponding flanges 202 via the connecting frame 205. The satellite simulator is mounted on any flange 202. Second bearings 204 are provided at both ends of the frame body 203 along its length. The reset rod 201 is located in the middle of the upper side of the frame body 203. Figure 2 As shown, the second brake assembly 6 is provided in the connecting frame 205 on one side of the frame body 203.

[0041] like Figures 2-3 As shown, a first encoder 207 is installed inside the lower bracket 301 on either side to detect the roll angle of the rolling frame 2 rotating around the BB axis, such as... Figure 5 As shown, a second encoder 206 is provided on one side of the frame body 203 for detecting the yaw angle of the rolling frame 2 rotating about the AA axis. The encoder is a technology known in the art and is a commercially available product.

[0042] The working principle of this invention is as follows:

[0043] The cross shaft 1 and related structural design of this invention can reduce frictional resistance torque while ensuring the dimensional accuracy of the rotation center and interface components, thereby achieving low-friction two-dimensional rotation. Under low-friction conditions, the motion of the rolling frame 2 and the driven frame 3 mainly depends on the direction and magnitude of the external force acting on the satellite simulator connected to the rolling frame 2. For example, using a space robotic arm to grasp the satellite simulator and apply a force to change its attitude can achieve better simulation results. Figure 3 As shown, the roll frame 2 rotates around the BB axis to simulate the roll degree of freedom of the satellite simulator, and rotates around the AA axis to simulate the yaw degree of freedom of the satellite simulator. Furthermore, the present invention can measure the angles of the roll and yaw degrees of freedom through the encoder, thereby realizing satellite attitude control. The first brake assembly 5 and the second brake assembly 6 of the present invention stop the roll frame 2 at a specified angle position, which also stops the satellite simulator at a specified angle position, facilitating experiments such as verifying satellite attitude control strategies, space robotic arm trajectory planning, and end-effector image recognition algorithms. The reset assembly acts on the reset rod 201 to reset the roll frame 2 to restore its initial zero-point position, facilitating repeated experiments. The roll frame 2 is installed in the driven frame 3, and the driven frame 3 has sliding components on both sides that are slidably connected to the equipment unit frame, thereby realizing the simulation of the lifting degree of freedom of the satellite simulator.

Claims

1. A two-dimensional turntable for a ground satellite simulator, characterized by: The application relates to a satellite simulator, which comprises a cross shaft (1), a rolling frame (2), a driven frame (3), a brake assembly and a reset assembly, wherein the rolling frame (2) is arranged in the driven frame (3), the cross shaft (1) is arranged in the rolling frame (2), the driven frame (3) is provided with first bearings (305) on the two sides inside the driven frame (3), the cross shaft (1) is arranged along the first rotating shaft of the BB axis, the two ends of the cross shaft (1) respectively extend out of the rolling frame (2) and are supported by the first bearings (305) on the corresponding sides, the driven frame (3) is internally provided with a first brake assembly (5) for limiting the rotation of the first rotating shaft, the rolling frame (2) is provided with second bearings (204) on the two ends along the AA axis, the cross shaft (1) is arranged along the second rotating shaft of the AA axis, the two ends of the cross shaft (1) are respectively supported by the second bearings (204) on the corresponding sides, and the rolling frame (2) is internally provided with a second brake assembly (6) for limiting the rotation of the second rotating shaft, the upper end of the driven frame (3) is provided with a mounting plate (303), the mounting plate (303) is provided with the reset assembly, the upper side of the rolling frame (2) is provided with a reset rod (201) penetrating through the mounting plate (303), and the reset rod (201) is reset by the reset assembly, the satellite simulator is mounted on the rolling frame (2), and the driven frame (3) is arranged in an equipment unit frame in a lifting mode.

2. A two-dimensional turntable for a ground satellite simulator according to claim 1, characterized in that: The outer sides of the first bearings (305) and the second bearings (204) are respectively provided with bearing gland nuts (7) and locking nuts (8), one end of the first rotating shaft of the cross shaft (1) forms a first brake shaft end (101) matched with the first brake assembly (5), and one end of the second rotating shaft of the cross shaft (1) forms a second brake shaft end (102) matched with the second brake assembly (6).

3. A two-dimensional turntable for a ground satellite simulator according to claim 1, characterized in that: The first brake assembly (5) and the second brake assembly (6) are the same in structure and respectively comprise a brake frame body (502), a brake cylinder (501) arranged on the brake frame body (502), a first clamping block (503) and a second clamping block (504), wherein the second clamping block (504) is fixedly arranged on the brake frame body (502), and the first clamping block (503) is driven to move by the brake cylinder (501) and matched with the second clamping block (504).

4. A two-dimensional turntable for a ground satellite simulator according to claim 1, characterized in that: The upper side of the mounting plate (303) is provided with two groups of first reset assemblies (41), and the lower side is provided with two groups of second reset assemblies (42), the first reset assembly (41) and the second reset assembly (42) are the same in structure and respectively comprise a reset cylinder (401) and an L-shaped reset plate (402), the L-shaped reset plate (402) is slidably connected with the mounting plate (303) and driven to move by the reset cylinder (401), and the moving direction of the reset cylinder (401) in the first reset assembly (41) is perpendicular to the moving direction of the reset cylinder (401) in the second reset assembly (42).

5. A two-dimensional turntable for a ground satellite simulator according to claim 4, characterized in that: The reset rod (201) is relatively moved by the L-shaped reset plates (402) in the two groups of first reset assemblies (41) to realize yaw reset, and the reset rod (201) is relatively moved by the L-shaped reset plates (402) in the two groups of second reset assemblies (42) to realize roll reset.

6. A two-dimensional turntable for a ground satellite simulator according to claim 4, characterized in that: The installation plate (303) is provided with a reset sliding rail (404), the reset air cylinder (401) is connected with the L-shaped reset plate (402) through a connecting plate (405), the lower side of the L-shaped reset plate (402) is provided with a reset sliding block (403) matched with the reset sliding rail (404) on the corresponding side, the reset sliding rail (404) is provided with a limiting seat (406) at the end away from the reset air cylinder (401), and the limiting seat (406) is provided with a limiting screw rod (407).

7. A two-dimensional turntable for a ground satellite simulator according to claim 1, characterized in that: The driven frame (3) comprises side frame bodies on both sides, and the side frame bodies comprise upper supports (302) and lower supports (301), wherein the first bearings (305) and the first brake assemblies (5) are both mounted on the corresponding lower supports (301), and the installation plates (303) are fixedly connected with the corresponding upper supports (302) on both sides.

8. A two-dimensional turntable for a ground satellite simulator according to claim 7, characterized in that: The side frame bodies are provided with sliding assemblies and equipment unit frame sliding connections on both sides, and the sliding assemblies comprise guide wheels (306) and sliding blocks (304).

9. The two-dimensional turntable for a terrestrial satellite emulator of claim 1, wherein: The rolling frame (2) comprises a frame body (203), connecting frames (205) and flanges (202), the frame body (203) is fixedly connected with the corresponding flange (202) through the connecting frame (205) on both ends, the frame body (203) is provided with the second bearing (204) at the length direction of both ends, the frame body (203) is provided with the reset rod (201) on the upper middle part, and the connecting frame (205) on one side of the frame body (203) is provided with the second brake assembly (6) in the inside.

10. A two-dimensional turntable for a ground satellite simulator according to claim 1, characterized in that: The first encoder (207) for detecting the rolling angle is arranged in any side of the driven frame (3), and the second encoder (206) for detecting the yaw angle is arranged in any end of the rolling frame (2).

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