An antenna turntable for low earth orbit satellite communications and method of use

Abstract

The application relates to the technical field of satellite communication, in particular to an antenna rotating table for low-orbit satellite communication and a use method thereof. The antenna rotating table comprises a support frame, a horizontal driver, a horizontal rotating shell, a vertical driver, a vertical rotating shell, an antenna frame, a standby motor, a gear shifter, a first gear set and a second gear set. The horizontal driver is arranged in the support frame and used for driving the horizontal rotating shell to rotate. The vertical driver is arranged in the horizontal rotating shell and used for driving the vertical rotating shell to rotate. The antenna frame is arranged on the vertical rotating shell. The standby motor is arranged in the horizontal rotating shell. The gear shifter is connected with the standby motor and used for controlling the standby motor to be in meshing with the first gear set, meshing with the second gear set or in a neutral state. The first gear set is connected with the horizontal rotating shell. The second gear set is connected with the vertical rotating shell. The standby motor system can be used to maintain basic functions in an emergency, so that the reliability and efficiency of the low-orbit satellite communication are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of satellite communication technology, and in particular to an antenna turntable for low-Earth orbit satellite communication and a method of using it. Background Technology

[0002] Low Earth Orbit (LEO) satellite communication systems are typically used to provide global broadband internet access and other communication services. To communicate effectively with these fast-moving satellites, ground stations need antennas capable of rapidly adjusting their orientation to track the satellites.

[0003] Upon startup, the antenna turntable enters the initialization phase, calibrating various sensors and checking the system's health. Once the satellite to be tracked is identified, the controller calculates the optimal pointing angle for the antenna based on the satellite's orbital data. The motors adjust the antenna angle according to commands from the controller to keep the antenna beam aligned with the satellite.

[0004] The current antenna configuration uses two motors to drive it to rotate in two directions. If one of the motors fails, the turntable will malfunction, thus reducing operational reliability. Summary of the Invention

[0005] The purpose of this invention is to provide an antenna turntable and its usage method for low-Earth orbit satellite communication, which aims to maintain basic functions using a backup motor system in emergency situations, thereby greatly improving the reliability and efficiency of low-Earth orbit satellite communication.

[0006] To achieve the above objectives, in a first aspect, the present invention provides an antenna turntable for low-Earth orbit satellite communication, comprising a support frame, a lateral driver, a lateral rotating shell, a longitudinal driver, a longitudinal rotating shell, and an antenna mount. The lateral driver is disposed in the support frame and is used to drive the lateral rotating shell to rotate. The longitudinal driver is disposed in the lateral rotating shell and is used to drive the longitudinal rotating shell to rotate. The antenna mount is disposed on the longitudinal rotating shell. The turntable also includes a spare motor, a gear shifter, a first gear set, and a second gear set. The spare motor is disposed inside the lateral rotating shell. The gear shifter is connected to the spare motor and is used to control the spare motor to be in a state of engagement with the first gear set and the second gear set, or in neutral. The first gear set is connected to the lateral rotating shell, and the second gear set is connected to the longitudinal rotating shell.

[0007] The gear shifter includes a support rod, a shift gear, a flexible paddle, a shift motor, a reducer, and a shift lever. The support rod is connected to the output end of the backup motor. The shift gear is driven on the support rod. The shift lever is rotatably mounted on one side of the shift gear. The flexible paddle has a slot and is mounted on the shift lever. The reducer is connected to the shift lever. The output end of the shift motor is connected to the reducer.

[0008] The gear shifter also includes a return spring, which is disposed on one side of the gear shift lever.

[0009] The gear shifter also includes a limiting plate, which is disposed on one side of the support rod and is used to limit the movement position of the shift gear.

[0010] The second gear set includes a first bevel gear, a driven gear, and a second bevel gear. The driven gear is rotatably disposed on one side of the shift gear. The first bevel gear is fixedly connected to the driven gear. The second bevel gear is connected to the longitudinal rotating housing and meshes with the first bevel gear.

[0011] The second gear set further includes a stabilizer, which is disposed on the outside of the second bevel gear.

[0012] The stabilizer includes a frame, multiple ball bearings, and a locking screw. The frame is slidably mounted on the support frame, the multiple ball bearings are rotatably mounted on the top of the frame, and the locking screw is threadedly connected to the frame and close to the support frame.

[0013] Secondly, the present invention also provides a method of using an antenna turntable for low-orbit satellite communication, comprising: mounting an antenna onto the antenna mount;

[0014] The horizontal and vertical actuators move to adjust the position of the antenna mount, so that the antenna moves synchronously with the low-orbit satellite.

[0015] When a malfunction occurs during operation, the problematic driver is detected;

[0016] The starter shifter connects the gear set of the backup motor and the driver on the faulty side for auxiliary drive.

[0017] This invention discloses an antenna turntable and its usage method for low-Earth orbit satellite communication. The support frame not only provides a stable mounting foundation but also bears the weight of all other components, ensuring the stability and strength of the overall structure. A lateral actuator, installed inside the support frame, primarily functions to adjust the horizontal angle of the antenna by driving a lateral rotating shell. The lateral rotating shell rotates around a vertical axis, controlled by the lateral actuator, providing a variable horizontal platform for the longitudinal actuator and its upper components. The longitudinal actuator, located inside the lateral rotating shell, drives the longitudinal rotating shell to rotate in a direction perpendicular to the horizontal plane, controlling the antenna's pitch angle. The longitudinal rotating shell, mounted on top of the lateral rotating shell, rotates according to the power provided by the longitudinal actuator, thereby driving the antenna mount in pitch motion. The antenna mount is fixed to the longitudinal rotating shell and changes its orientation with the movement of the longitudinal rotating shell, ensuring that the antenna is always accurately pointed at the target requiring communication.

[0018] In addition, to enhance the reliability and flexibility of the system, the present invention also incorporates the following auxiliary mechanisms:

[0019] A backup motor is housed inside the transverse rotating housing, serving as a backup for the main drive system. It can be activated to ensure normal system operation in the event of a main system failure. A gear shifter is connected to the backup motor, controlling its operating mode to engage with the first or second gear set, or remain in neutral. The first gear set is connected to the transverse rotating housing; when the backup motor engages with it, it can replace the transverse actuator to control the movement of the transverse rotating housing. The second gear set is connected to the longitudinal rotating housing; when the backup motor engages with it, it can replace the longitudinal actuator to control the movement of the longitudinal rotating housing. Through this design, the antenna turntable provided by this invention can not only accurately adjust the antenna's direction under normal conditions but also maintain basic functions using the backup motor system in emergencies, greatly improving the reliability and efficiency of low-Earth orbit satellite communication. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural diagram of an antenna turntable for low-Earth orbit satellite communication according to the present invention.

[0022] Figure 2This is a cross-sectional view of an antenna turntable for low-orbit satellite communication according to the present invention.

[0023] Figure 3 This is a right-side structural diagram of an antenna turntable for low-Earth orbit satellite communication according to the present invention.

[0024] Figure 4 This is a longitudinal cross-sectional view of an antenna turntable for low-Earth orbit satellite communication according to the present invention.

[0025] Figure 5 This is a structural diagram of the fault monitoring module of the present invention.

[0026] Figure 6 This is a flowchart illustrating a method of using an antenna turntable for low-Earth orbit satellite communication according to the present invention.

[0027] Support frame 101, lateral actuator 102, lateral rotating shell 103, longitudinal actuator 104, longitudinal rotating shell 105, antenna frame 106, spare motor 107, gear shifter 108, first gear set 109, second gear set 110, support rod 111, shift gear 112, elastic paddle 113, shift motor 114, reducer 115, shift lever 116, return spring 117, limit plate 118, first bevel gear 119, driven gear 120, second bevel gear 121, stabilizer frame 122, frame body 123, ball bearing 124, locking screw 125, fault monitoring module 126, gyroscope 127, error calculation unit 128, judgment unit 129, control unit 130, alarm unit 131. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] First Embodiment

[0031] Please see Figures 1-5 This invention provides an antenna turntable for low-Earth orbit satellite communication, comprising a support frame 101, a lateral driver 102, a lateral rotating shell 103, a longitudinal driver 104, a longitudinal rotating shell 105, and an antenna mount 106. The lateral driver 102 is disposed in the support frame 101 and is used to drive the lateral rotating shell 103 to rotate. The longitudinal driver 104 is disposed in the lateral rotating shell 103 and is used to drive the longitudinal rotating shell 105 to rotate. The antenna mount 106 is disposed on the longitudinal rotating shell 105. The turntable also includes a spare motor 107, a shifter 108, a first gear set 109, and a second gear set 110. The spare motor 107 is disposed inside the lateral rotating shell 103. The shifter 108 is connected to the spare motor 107 and is used to control the spare motor 107 to be in a state of engagement with the first gear set 109 and the second gear set 110, or in neutral. The first gear set 109 is connected to the lateral rotating shell 103, and the second gear set 110 is connected to the longitudinal rotating shell 105.

[0032] In this embodiment, the present invention relates to an antenna turntable device for a low-Earth orbit satellite communication system, which aims to improve the tracking accuracy and reliability of the antenna for ground stations or other satellite targets. The support frame 101 serves as the basic structure of the entire device, providing a stable mounting base, bearing the weight of all other components, and ensuring the stability and strength of the overall structure. A lateral actuator 102 is installed inside the support frame 101, and its main function is to adjust the horizontal angle by driving the lateral rotating housing 103, thereby changing the horizontal azimuth angle of the antenna. The lateral rotating housing 103 rotates around a vertical axis, and its rotation is controlled by the lateral actuator 102, providing a variable horizontal platform for the longitudinal actuator 104 and its upper components. The longitudinal actuator 104 is located inside the lateral rotating housing 103 and is responsible for driving the longitudinal rotating housing 105 to rotate in a direction perpendicular to the horizontal plane, i.e., controlling the pitch angle of the antenna. The longitudinal rotating housing 105 is mounted on the lateral rotating housing 103 and can rotate according to the power provided by the longitudinal actuator 104, thereby driving the antenna mount 106 to perform pitch movement. The antenna mount 106 is fixed on the longitudinal rotating housing 105, and changes its orientation as the longitudinal rotating housing 105 moves, ensuring that the antenna can always accurately point to the target that needs to be communicated.

[0033] In addition, to enhance the reliability and flexibility of the system, the present invention also incorporates the following auxiliary mechanisms:

[0034] A backup motor 107 is housed inside the transverse rotating housing 103 as a backup for the main drive system. It can be activated to ensure normal system operation in the event of a main system failure. A gear shifter 108 is connected to the backup motor 107, allowing control over its operating mode. The gear shifter 108 can engage the backup motor 107 with either the first gear set 109 or the second gear set 110, or keep it in neutral. The first gear set 109 is connected to the transverse rotating housing 103. When the backup motor 107 engages with the first gear set 109, it can replace the transverse drive 102 to control the movement of the transverse rotating housing 103. The second gear set 110 is connected to the longitudinal rotating housing 105. When the backup motor 107 engages with the second gear set 110, it can replace the longitudinal drive 104 to control the movement of the longitudinal rotating housing 105.

[0035] Through the above design, the antenna turntable provided by the present invention can not only accurately adjust the antenna pointing under normal conditions, but also maintain basic functions in emergency situations by using the backup motor 107 system, which greatly improves the reliability and efficiency of low-orbit satellite communication.

[0036] The gear shifter 108 includes a support rod 111, a shift gear 112, an elastic paddle 113, a shift motor 114, a reducer 115, and a shift lever 116. The support rod 111 is connected to the output end of the backup motor 107. The shift gear 112 is slidably mounted on the support rod 111. The shift lever 116 is rotatably mounted on one side of the shift gear 112. The elastic paddle 113 has a slot and is mounted on the shift lever 116. The reducer 115 is connected to the shift lever 116. The output end of the shift motor 114 is connected to the reducer 115.

[0037] Support rod 111: One end of the support rod 111 is directly connected to the output shaft of the standby motor 107, and the other end is used to install other components. The shift gear 112 is designed to slide on the support rod 111, and it can move to different positions as needed to mesh with the first gear set 109 or the second gear set 110.

[0038] The shift lever 116 is rotatably mounted on one side of the shift gear 112. Its function is to establish or disconnect the connection between the shift gear 112 and different gear sets. When the shift lever 116 rotates, it can push the shift gear 112 to slide along the support rod 111 to the desired position.

[0039] Elastic paddle 113: The elastic paddle 113 is a design with a slot, which is mounted on the shift lever 116. The function of the elastic paddle 113 is to engage with a specific position through the slot when the shift lever 116 rotates, thereby ensuring that the shift gear 112 is accurately positioned in the first gear set 109 or the second gear set 110. The elastic properties of the elastic paddle 113 allow it to deform under force and return to its original shape when no force is applied, ensuring stable contact between it and the shift lever 116.

[0040] The reducer 115 is an important transmission component, connected to the shift lever 116. The main task of the reducer 115 is to regulate the speed transmitted from the shift motor 114, ensuring smooth and precise shifting and preventing impact or damage caused by excessive speed.

[0041] The output shaft of the shift motor 114 is connected to the reducer 115, which is the power source driving the entire shifting process. After the shift motor 114 starts, it reduces speed and increases torque through the reducer 115, and then transmits the torque to the shift gear 112 through the shift lever 116, ultimately realizing the shifting action.

[0042] The purpose of the entire gear shifter 108 is to enable the backup motor 107 to switch quickly and reliably between different gear sets, ensuring that the antenna turntable can still perform necessary actions through the backup system in the event of failure of the main drive system, thereby ensuring the continuity and stability of communication tasks.

[0043] The gear shifter 108 also includes a return spring 117, which is disposed on one side of the gear shift lever 116.

[0044] A return spring 117 is installed on one side of the shift lever 116. Its function is to help the shift lever 116 return to the predetermined initial position after shifting. By applying a reverse force, the return spring 117 ensures that the shift lever 116 will not deviate from the set position due to external interference, thereby ensuring the accuracy and repeatability of each shifting operation.

[0045] The gear shifter 108 also includes a limiting plate 118, which is disposed on one side of the support rod 111 and is used to limit the movement position of the shift gear 112.

[0046] A limiting plate 118 is disposed on one side of the support rod 111, mainly used to limit the movement range of the shift gear 112 and prevent it from exceeding the predetermined trajectory during sliding. The presence of the limiting plate 118 ensures that the shift gear 112 can only move within the specified area, avoiding mechanical interference or damage caused by excessive displacement.

[0047] The second gear set 110 includes a first bevel gear 119, a driven gear 120, and a second bevel gear 121. The driven gear 120 is rotatably disposed on one side of the shift gear 112. The first bevel gear 119 is fixedly connected to the driven gear 120. The second bevel gear 121 is connected to the longitudinal rotating housing 105 and meshes with the first bevel gear 119.

[0048] The first bevel gear 119 is fixedly connected to the driven gear 120 and is used to convert linear motion into part of rotational motion. The design of the first bevel gear 119 allows power to be transmitted along different axes. The driven gear 120 is mounted on one side of the shift gear 112 and forms a linkage relationship with it. When the shift gear 112 moves and meshes with it, the driven gear 120 begins to rotate and transmits power to the first bevel gear 119. The second bevel gear 121 is connected to the longitudinal rotating housing 105 and forms a right-angle transmission relationship with the first bevel gear 119. The second bevel gear 121 receives power from the first bevel gear 119 and then transmits it to the longitudinal rotating housing 105, thereby realizing the rotation of the longitudinal rotating housing 105.

[0049] The second gear set 110 also includes a stabilizer 122, which is disposed on the outside of the second bevel gear 121.

[0050] The stabilizer 122 is used to improve the stability of the second gear set 110 during operation.

[0051] The stabilizer 122 includes a frame 123, a plurality of balls 124 and a locking screw 125. The frame 123 is slidably mounted on the support frame 101. The plurality of balls 124 are rotatably mounted on the top of the frame 123. The locking screw 125 is threadedly connected to the frame 123 and is close to the support frame 101.

[0052] The frame 123 is slidably mounted on the support frame 101, allowing it to slide freely within a certain range; multiple ball bearings 124 are arranged on the top of the frame 123 to reduce friction and ensure smooth movement; the locking screw 125 is threadedly connected to the frame 123 and is located close to the support frame 101. The position of the frame 123 can be adjusted by tightening or loosening the locking screw 125, thereby achieving the purpose of fine-tuning the second gear set 110.

[0053] The antenna turntable for low-orbit satellite communication also includes a fault monitoring module 126, which is mounted on the antenna frame 106 and is used to monitor the movement error of the antenna. When the error exceeds a preset value, it is determined that there is a driver failure and the backup motor 107 needs to be started for auxiliary driving.

[0054] The fault monitoring module 126 is mounted on the antenna mount 106, and its core function is to continuously monitor the movement error of the antenna. Once the deviation between the actual position and the expected position is found to exceed a preset safety threshold, the module will automatically determine that the main drive system may have failed and immediately start the backup motor 107 for auxiliary drive to ensure that the antenna can continue to point accurately at the target.

[0055] The fault monitoring module 126 includes a gyroscope 127, an error calculation unit 128, a judgment unit 129, a control unit 130, and an alarm unit 131. The gyroscope 127 is mounted on the antenna frame 106. The error calculation unit 128 is used to calculate the deflection angle error based on the data from the gyroscope 127 and the movement data of the lateral driver 102 and the longitudinal driver 104. The judgment unit 129 is used to determine whether the lateral and longitudinal deflection angle errors are within preset values. The control unit 130 is used to control the backup motor 107 and the gear set on the corresponding driver side to connect for auxiliary drive if the deflection angle error is greater than the preset value. The alarm unit 131 is used to upload fault information to the host computer.

[0056] The gyroscope 127 is an important component of the fault monitoring module 126. It is mounted on the antenna mount 106 and is capable of measuring the antenna's angular velocity and attitude changes with high precision. The data provided by the gyroscope 127 is a key input for calculating the actual position of the antenna.

[0057] The error calculation unit 128 uses real-time data acquired by the gyroscope 127, combined with the actual movement data of the lateral driver 102 and the longitudinal driver 104, to calculate the angular error between the current antenna position and the target position. Based on this information, the error calculation unit 128 can assess whether the current antenna position meets preset requirements.

[0058] The judgment unit 129 is responsible for analyzing the results obtained by the error calculation unit 128. Specifically, it checks whether the lateral and longitudinal angular errors are within a preset safety range. If the error of any axis exceeds the allowable limit, the judgment unit 129 will trigger the next action.

[0059] Once the judgment unit 129 confirms an abnormality, the control unit 130 will immediately intervene and connect the backup motor 107 to the corresponding gear set (i.e., the first gear set 109 or the second gear set 110) to begin auxiliary drive. In this way, even if the main drive system fails, the antenna can still complete the necessary adjustment actions through the backup system.

[0060] The function of alarm unit 131 is to promptly upload relevant information to the host computer when the system detects a fault. This not only allows the ground control center to quickly understand the status of the equipment, but also provides a basis for subsequent troubleshooting and maintenance.

[0061] Through the coordinated work of the above-mentioned components, the fault monitoring module 126 can identify potential problems in the first instance and take measures to prevent mission interruption due to drive system failure, thereby ensuring the continuity and reliability of low-orbit satellite communication.

[0062] Second Embodiment

[0063] Please see Figure 6 The present invention also provides a method of using an antenna turntable for low-Earth orbit satellite communication, comprising:

[0064] S201 The antenna is mounted onto the antenna mount 106;

[0065] Before formal use, the communication antenna must first be correctly installed on the antenna mount 106. This step requires ensuring that the antenna is securely fixed to the antenna mount 106 and that all connectors are installed according to specifications. After installation, preliminary calibration is required to ensure that the antenna is in the correct starting position without external power.

[0066] The S202 horizontal actuator 102 and vertical actuator 104 drive the antenna mount 106 to adjust its position, so that the antenna moves synchronously with the low-orbit satellite.

[0067] After the antenna is installed, the next step is to adjust the position of the antenna mount 106 using the horizontal actuator 102 and the vertical actuator 104. Through the coordinated operation of these two actuators, the antenna can be precisely adjusted in both the horizontal and vertical dimensions, ensuring that the antenna is always aligned with the low-Earth orbit satellite in orbit. During this process, the control system dynamically adjusts the antenna angle based on the satellite's real-time position data to maintain optimal communication link quality.

[0068] S203 detects the problematic driver when a malfunction occurs during movement;

[0069] If any abnormality occurs during antenna tracking, such as failure to adjust position as expected, the fault monitoring module 126 will immediately activate to detect and determine which driver is malfunctioning. Through built-in sensors and computing units, the fault source can be quickly located, and relevant error information can be recorded.

[0070] S204 starter shifter 108 connects the gear set of the backup motor 107 and the driver on the faulty side for auxiliary drive.

[0071] Once the exact location of the fault is determined, the control system will instruct the shifter 108 to start and connect the backup motor 107 to the gear set of the drive on the faulty side. The backup motor 107 will take over the function of the faulty drive and continue to drive the antenna mount 106 for position adjustment, ensuring that normal antenna tracking is not affected. During this process, the system will also automatically record fault information and send this data to the ground control center for subsequent diagnosis and maintenance.

[0072] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An antenna turntable for low-Earth orbit satellite communication, comprising a support frame, a lateral actuator, a lateral rotating housing, a longitudinal actuator, a longitudinal rotating housing, and an antenna mount, wherein the lateral actuator is disposed in the support frame for driving the lateral rotating housing to rotate, the longitudinal actuator is disposed in the lateral rotating housing for driving the longitudinal rotating housing to rotate, and the antenna mount is disposed on the longitudinal rotating housing, characterized in that, The system also includes a backup motor, a shifter, a first gear set, and a second gear set. The backup motor is housed within the transverse rotating housing, and the shifter is connected to the backup motor. The shifter controls the backup motor to be engaged with the first and second gear sets or in neutral. The first gear set is connected to the transverse rotating housing, and the second gear set is connected to the longitudinal rotating housing. The antenna turntable for low-orbit satellite communication also includes a fault monitoring module mounted on the antenna frame. This module monitors the antenna's movement error. When the error exceeds a preset value, a driver malfunction is detected, and the backup motor is activated for auxiliary drive. The fault monitoring module includes a gyroscope, an error calculation unit, a judgment unit, a control unit, and an alarm unit. The gyroscope is mounted on the antenna frame. The error calculation unit calculates the skew angle error based on the gyroscope data and the movement data of the transverse and longitudinal drivers. The judgment unit determines whether the transverse and longitudinal skew angle errors are within preset values. The control unit is used to control the connection between the backup motor and the gear set on the corresponding driver side for auxiliary drive if the deviation angle error is greater than a preset value; the alarm unit is used to upload fault information to the host computer; the shifter includes a support rod, a shift gear, a flexible paddle, a shift motor, a reducer, and a shift lever. The support rod is connected to the output end of the backup motor, the shift gear is slidably mounted on the support rod, the shift lever is rotatably mounted on one side of the shift gear, the flexible paddle has a slot, the flexible paddle is mounted on the shift lever, the reducer is connected to the shift lever, and the output end of the shift motor is connected to the reducer; the shifter also includes... The shift lever includes a return spring disposed on one side of the shift lever; the shift lever also includes a limiting plate disposed on one side of the support rod, used to limit the movement position of the shift gear; the elastic paddle is a design with a slot, which is installed on the shift lever. The function of the elastic paddle is to cooperate with a specific position through the slot when the shift lever rotates, thereby ensuring that the shift gear is accurately positioned in the position of the first gear set or the second gear set. The return spring is installed on one side of the shift lever, and its function is to help the shift lever return to the predetermined initial position after shifting. The limiting plate is used to limit the movement range of the shift gear and prevent it from exceeding the predetermined trajectory during sliding.

2. An antenna turntable for low-Earth orbit satellite communication as described in claim 1, characterized in that, The second gear set includes a first bevel gear, a driven gear, and a second bevel gear. The driven gear is rotatably disposed on one side of the shift gear. The first bevel gear is fixedly connected to the driven gear. The second bevel gear is connected to the longitudinal rotating housing and meshes with the first bevel gear.

3. An antenna turntable for low-Earth orbit satellite communication as described in claim 2, characterized in that, The second gear set also includes a stabilizer, which is disposed on the outside of the second bevel gear.

4. An antenna turntable for low-Earth orbit satellite communication as described in claim 3, characterized in that, The stabilizer includes a frame, multiple ball bearings, and a locking screw. The frame is slidably mounted on the support frame, the multiple ball bearings are rotatably mounted on the top of the frame, and the locking screw is threadedly connected to the frame and close to the support frame.

5. A method of using an antenna turntable for low-Earth orbit satellite communication, comprising the antenna turntable for low-Earth orbit satellite communication as described in any one of claims 1 to 4. Its features are, Includes: mounting the antenna onto the antenna mount; The horizontal and vertical actuators move to adjust the position of the antenna mount, so that the antenna moves synchronously with the low-orbit satellite. When a malfunction occurs during operation, the problematic driver is detected; The starter shifter connects the gear set of the backup motor and the driver on the faulty side for auxiliary drive.

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