A universal chassis for satellite motion simulator combining air flotation and wheels

Abstract

This universal chassis combines air-floating and wheeled satellite motion simulators for simulating satellite attitude and orbit control on a ground-based air-floating platform. The chassis consists of a chassis frame, air-floating cushions, steering wheels, suction cup brakes, laser ranging sensors, a lead-acid battery pack, an uninterruptible power supply (UPS), a distribution box, a main control computer, and a measurement and control computer. This system enables controlled motion in three directions within a plane on the air-floating platform, measuring relative position and attitude. When multiple simulators are used, both absolute and relative motion control can be achieved.

Description

Technical Field

[0001] The invention relates to a universal chassis of a satellite motion simulator combining air flotation and wheels, belongs to the field of spacecraft ground tests, and is mainly used for attitude and orbit control tests of satellites on the ground. Background Art

[0002] With the advancement of aerospace technology, spacecraft's capabilities for controlling satellite attitude and orbital maneuvers are becoming increasingly sophisticated, and system functionality is becoming increasingly complex. To reduce development risks, system solutions must be validated through ground-based full-scale physical testing. Satellite attitude and orbital full-scale physical testing typically involves conducting physical tests of satellite control systems on a ground-based platform, using a satellite simulator as the control object.

[0003] Through experiments, the correctness of the satellite attitude and orbit maneuvering control system design, the satellite rendezvous and docking control scheme, the satellite on-orbit assembly control, the equivalence of the system mathematical model and the actual component performance, fault analysis and fault countermeasures research, etc. are verified.

[0004] However, existing satellite attitude pointing and orbital maneuvering control test verification methods mainly use a combination of software and hardware, semi-physical, or scaled-down full-physical methods. Among them, the software and hardware combined semi-physical test method uses the navigation equipment and satellite main control computer as physical objects, and the satellite control instructions drive the mathematical model to simulate the movement. The reason for using a mathematical model is that it is impossible for a full-scale satellite on the ground to achieve large-scale space movement. The scaled-down full-physical method is also limited by the low thrust of the ground-based cold air jet engine, as well as the ground gravity and air resistance environment. In order to simulate the position and attitude control of the satellite in orbit, the actual mass and inertia of the satellite need to be proportionally reduced according to the engine thrust of the ground simulator. Therefore, the existing semi-physical or full-physical test methods are mainly limited by the position and attitude drive control capabilities of the test equipment, and cannot simulate full-scale, equivalent mass and inertia, which affects the evaluation of the test results. Summary of the Invention

[0005] The technical problem solved by the present invention is: to overcome the shortcomings of the existing technology and provide a universal chassis of a satellite motion simulator that combines air flotation and wheels. As a universal chassis of a satellite motion simulator that simulates the attitude and orbit control of space satellites on a ground air flotation platform, it can realize full-scale and full-physics simulation of satellite attitude and orbit control.

[0006] The technical solution of the present invention is:

[0007] A universal chassis for a satellite motion simulator combining air-floating and wheels, comprising a chassis frame, an air-floating cushion assembly, a steering wheel, a suction cup brake, a laser ranging sensor, a main control computer, and a measurement and control computer;

[0008] The chassis frame is placed on the air-floating platform, and a flange frame is provided above the chassis frame for installing the satellite motion simulator;

[0009] An air flotation cushion group is formed by multiple air flotation cushions and is installed below the chassis frame. The multiple air flotation cushions are evenly distributed on the lower surface of the chassis frame. High-pressure air is introduced into the air flotation cushion group to form an air film between the chassis frame and the air flotation platform to balance gravity. The center of mass of the satellite motion simulator coincides with the centroid of the air flotation support surface formed by the air flotation cushion group.

[0010] The chassis frame is a rectangular frame, and two steering wheels are installed below the chassis frame and located at the two vertices of a diagonal line of the chassis frame. After receiving the steering wheel horizontal movement command from the measurement and control computer, the steering wheel can move horizontally and rotate along the horizontal plane of the air bearing platform.

[0011] Two laser distance measuring sensors are installed at equal distances on each long side of the chassis frame, and one laser distance measuring sensor is installed on each short side of the chassis frame. The laser distance measuring sensor emits laser light to a calibrated reflector, measures the distance between itself and the reflector, and sends the information to the measurement and control computer.

[0012] The measurement and control computer sends the distance data measured by the laser ranging sensor to the main control computer, and drives the steering wheel to move according to the steering wheel movement instruction calculated by the main control computer; and drives the suction cup brake to work according to the braking instruction or working instruction sent by the main control computer;

[0013] The main control computer calculates the current position and attitude of the satellite motion simulator based on the distance measured by the laser ranging sensors arranged on each frame of the chassis frame, and performs path trajectory planning based on the target position and attitude to be achieved. The planned trajectory is decomposed into the real-time angle, angular velocity, position and speed control variables of the satellite motion simulator. Based on this, the steering wheel movement instructions are generated and sent to the measurement and control computer. When the satellite motion simulator needs to brake in position, the main control computer sends a braking instruction to the measurement and control computer. When braking ends and work begins, the main control computer sends a work instruction to the measurement and control computer.

[0014] The suction cup brake is installed at the center below the chassis frame. After receiving the braking command from the measurement and control computer, the suction cup brake moves downward and contacts the air floating platform to achieve braking; after receiving the working command from the measurement and control computer, it moves upward and separates from the air floating platform, restoring the motion ability of the satellite motion simulator universal chassis.

[0015] Preferably, it also includes a lead-acid battery pack, an uninterruptible power supply and a distribution box, which are all arranged on the chassis frame and together constitute the power supply and distribution system of the satellite motion simulator.

[0016] Preferably, the uninterruptible power supply provides separate power to the main control computer and the measurement and control computer.

[0017] Preferably, when the center of mass of the satellite motion simulator does not coincide with the centroid of the air-bearing support surface, a counterweight is added to the chassis frame to adjust the position of the center of mass of the satellite motion simulator.

[0018] Preferably, the measurement and control computer also establishes wireless communication with the ground test control system.

[0019] The steering wheel includes a steering wheel body, an elastic support, a lifting cylinder, a steering drive motor, a rolling drive motor and a drive wheel;

[0020] Among them, the steering wheel body serves as the supporting structure of the steering wheel, and the upper surface is fixed to the chassis frame through elastic support; the lifting cylinder is installed on the upper surface of the steering wheel body, and the rolling drive motor rotor and the drive wheel are coaxially installed on the lower surface of the steering wheel body. The rolling drive motor is used to drive the drive wheel to roll along the lower surface of the chassis frame to realize the forward and backward movement of the chassis frame on the air floating platform; the steering drive motor is installed on the lower surface of the steering wheel body, and the rolling drive motor stator is driven to rotate by gears. The rotation of the rolling drive motor stator drives the drive wheel to realize steering.

[0021] Preferably, the lifting cylinder is used to control whether the driving wheel contacts the surface of the air bearing platform: when the satellite motion simulator is in a controlled state, the lifting cylinder drives the steering wheel body to move downward, thereby lowering the driving wheel and making it contact with the air bearing platform; after the air bearing cushion group balances the gravity of the satellite motion simulator through air bearing support, the driving wheel controls the in-plane position and posture of the satellite motion simulator on the air bearing platform under the joint action of the steering drive motor and the rolling drive motor; the motion command of the steering wheel is solved by the main control computer based on the measurement data of the laser ranging sensor, and is respectively formed into control commands for the steering drive device and the rolling drive device, which are sent by the measurement and control computer;

[0022] When the satellite motion simulator is required to be in a passive floating state, the lifting cylinder drives the steering wheel body to move upward, lifts the driving wheel, and separates it from the air floating platform.

[0023] Preferably, the suction cup brake comprises a suction cup brake body, an elastic suction cup, a lifting motor and a lifting guide rail;

[0024] Among them, the suction cup brake body serves as the supporting structure of the suction cup brake, and its upper surface is fixed to the chassis frame through a lifting guide rail; the suction cup brake body is a frame structure, and the lower surfaces of its four corners are installed with elastic suction cups, and the lifting motor is installed on the upper surface of the suction cup brake body; after the lifting motor receives the braking command from the measurement and control computer, it drives the suction cup brake body to move downward along the lifting guide rail until the elastic suction cup contacts the air floating table, thereby realizing the braking of the universal chassis of the satellite motion simulator; after the lifting motor receives the working command from the measurement and control computer, it drives the suction cup brake body to move upward along the lifting guide rail until the elastic suction cup is separated from the air floating table, thereby restoring the movement ability of the universal chassis of the satellite motion simulator.

[0025] Preferably, the air floating cushions are installed over constraints, and each air floating cushion contacts the chassis frame in a single-point ball-and-socket manner.

[0026] Preferably, the size of the chassis frame is consistent with the actual size of the satellite.

[0027] Compared with existing technologies, the present invention offers the following advantages: It proposes a universal chassis for satellite motion simulators that combines air-bearing and wheeled operation, applicable to the motion chassis of air-bearing platform satellite simulators. It enables controlled motion in three directions within the plane of the platform, measures relative position and attitude, and, when used with multiple simulators, enables both absolute and relative motion control. Furthermore, compared to conventional jet-based satellite motion simulator chassis, the present invention offers the advantages of greater load-bearing capacity, high control accuracy, and superior acceleration, enabling full-scale, fully physical simulation of satellite attitude and orbit control. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Satellite motion simulator universal chassis assembly drawing;

[0029] Figure 2 Bottom view of the universal chassis;

[0030] Figure 3 Universal chassis front view;

[0031] Figure 4 Schematic diagram of the steering wheel;

[0032] Figure 5 Schematic diagram of suction cup brake;

[0033] Figure 6 Schematic diagram of an air flotation cushion. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0035] Figure 1 Assembly diagram for the satellite motion simulator universal chassis.

[0036] The present invention presents a universal chassis for a satellite motion simulator that combines air flotation and wheels. This chassis can be used as a universal chassis for motion simulators used on ground-based air flotation platforms to simulate the attitude and orbit control of space satellites. The chassis includes a chassis frame 1, an air flotation cushion assembly 2, a steering wheel 3, a suction cup brake 4, a laser ranging sensor 5, a lead-acid battery pack 6, an uninterruptible power supply 7, a distribution box 8, a main control computer 9, and a measurement and control computer 10. The chassis can achieve controlled motion in three directions within a plane on the air flotation platform, measure relative position and attitude, and, when used with multiple simulators, achieve both absolute and relative motion control.

[0037] The chassis frame 1 is a rectangular frame that provides the foundation for equipment installation. The air cushion assembly 2, steering wheel 3, suction cup brake 4, laser ranging sensor 5, lead-acid battery pack 6, uninterruptible power supply 7, distribution box 8, main control computer 9, and measurement and control computer 10 are all mounted on the chassis frame 1. The configuration and dimensions of the chassis frame 1 simulate the actual dimensions of a satellite.

[0038] High-pressure air is introduced into the air cushions 2, creating an air film between the chassis frame 1 and the granite air cushion platform to balance gravity and achieve a suspended support effect. The number and size of the air cushions 2 are related to the mass, inertia, and layout of the entire satellite simulator. Multiple air cushions are installed over-constrained, using a single-point ball-and-socket contact configuration on the chassis frame 1. Multiple air cushions provide multi-point redundant support.

[0039] The steering wheels 3 are used to move the satellite motion simulator from its initial position to the test position. The steering wheels are driven by a motor. To ensure the satellite motion simulator can quickly and accurately reach its target position, the main control computer 9 calculates the simulator's trajectory planning path based on the current and target positions measured by the laser ranging sensor 5. Two steering wheels 3 are mounted below the chassis frame 1 and located at the vertices of a diagonal line of the chassis frame 1. Upon receiving a horizontal motion command, the steering wheels 3 roll and turn along the horizontal plane of the air bearing platform. Upon receiving a normal motion command, the steering wheels move in the direction normal to the air bearing platform. As the steering wheels 3 move, the air cushion assembly 2 overcomes the gravity of the satellite motion simulator, leaving the steering wheels 3 solely responsible for planar and steering motion.

[0040] The suction cup brake 4 is designed as a motor-driven lifting and braking mechanism, used for braking and maintaining the position of the satellite motion simulator. It is constructed with multiple rubber discs with a high coefficient of friction, and the motor drives the lead screw to achieve lifting motion. When the rubber discs contact the air bearing platform, the brake is applied; when they separate, the brake is released.

[0041] The laser distance sensor 5 measures the distance by emitting a laser to and from a calibrated reflector.

[0042] Two laser ranging sensors 5 are mounted equidistantly on each long side of the chassis frame 1, and one laser ranging sensor 5 is mounted on each short side. The laser ranging sensors 5 emit laser light at a calibrated reflector, measuring the distance between themselves and the reflector and forwarding the information to the main control computer 9 via the measurement and control computer 10. By installing six laser ranging sensors 5 on the four sides of the satellite motion simulator, the distances from each side to the reflectors are determined. The main control computer 9 then calculates the position and attitude of the satellite motion simulator on the air bearing platform based on these distances. If two satellite motion simulators are on the air bearing platform, the position and attitude of each satellite motion simulator measured by the laser ranging sensors 5 can be used to calculate the relative position and attitude of the two satellite motion simulators, providing the basis for conducting rendezvous experiments between the two satellites on the air bearing platform.

[0043] A lead-acid battery pack 6, an uninterruptible power supply 7, and a distribution box 8 are all located on the chassis frame 1 and together form the power supply and distribution system for the satellite motion simulator. The power of the lead-acid battery pack 6 is determined by the satellite motion simulator's power consumption and operating time. The uninterruptible power supply 7 provides independent power to the main control computer 9 and the measurement and control computer 10. This ensures that in the event of an emergency stop or power outage of the satellite motion simulator, the main control computer 9 and the measurement and control computer 10 will still have power, allowing them to record important test data without loss.

[0044] The main control computer 9 is the control system for the universal chassis of the satellite motion simulator. Its inputs are signals collected by the measurement and control computer 10 from measurement and execution devices such as the air cushion assembly 2, steering wheel 3, suction cup brake 4, laser rangefinder 5, and lead-acid battery pack 6. Its outputs are commands for controlling the inflation of the air cushion assembly 2, the movement of the steering wheel 3, and the operation of the suction cup brake 4. These measurement signals and execution commands are transmitted and received by the measurement and control computer 10. Simultaneously, the measurement and control computer 10 establishes wireless communication with the test system, ensuring that the satellite motion simulator can be controlled on the larger air cushion platform.

[0045] Figure 2 This is a bottom view of the universal chassis. Ten air cushions are arranged on the lower end surface of chassis frame 1, enabling bidirectional translation and yaw rotation within the plane of chassis frame 1. The key design principle is to evenly distribute the gravity of the satellite simulator across the ten air cushions, with the simulator's center of mass aligning with the centroid of the air support surface. Counterweights can be added to chassis frame 1 to adjust the center of gravity within the plane, while the overall center of gravity of the simulator can be lowered in height to improve its stability.

[0046] Figure 3 This is the front view of the universal chassis. Figure 4 Steering wheel. Figure 6 It is an air floating cushion.

[0047] Steering wheel 3 is driven by a motor. To ensure the satellite motion simulator can quickly and accurately reach its target position, the main control computer 9 calculates the simulator's trajectory plan path based on the current and target positions measured by the laser ranging sensor 5. Steering wheel 3 consists of a steering wheel body 301, elastic supports 302, a lifting cylinder 303, a steering drive 304, a rolling drive 305, and a drive wheel 306.

[0048] The steering wheel body 301 serves as the support structure for the steering wheel 3 and is secured to the chassis frame 1 via elastic supports 302. Driven by the lift cylinder 303, the drive wheel 306 moves along the lower surface of the chassis frame 1 and the normal to the air bearing platform. The use of four elastic supports 302 allows for fine pitch and yaw adjustments. The rolling drive motor suction cup brake body 305 suction cup brake body rotor and the driving wheel suction cup brake body 306 suction cup brake body are coaxially installed on the lower surface of the steering wheel body suction cup brake body 301 suction cup brake body. The rolling drive motor suction cup brake body 305 suction cup brake body is used to drive the driving wheel suction cup brake body 306 suction cup brake body to roll along the lower surface of the chassis frame suction cup brake body 1 suction cup brake body; the steering drive motor suction cup brake body 304 suction cup brake body is installed on the lower surface of the steering wheel body suction cup brake body 301 suction cup brake body, and the rolling drive motor suction cup brake body 305 suction cup brake body stator is driven to rotate through gears. The rotation of the rolling drive motor suction cup brake body 305 suction cup brake body stator drives the driving wheel suction cup brake body 306 suction cup brake body to turn.

[0049] The lifting cylinder 303 is used to control whether the driving wheel 306 contacts the surface of the air bearing platform.

[0050] When the satellite motion simulator is actively controlling its position and attitude, the lifting cylinder 303 lowers the drive wheel 306 into contact with the air bearing platform. After the air bearing cushion assembly 2 balances the satellite motion simulator's gravity through air support, the drive wheel 306, working in conjunction with the steering drive 304 and rolling drive 305, controls the satellite motion simulator's in-plane position and attitude on the air bearing platform. The main control computer 9 interprets the motion instructions for the steering wheel 3 based on the measurement data from the laser rangefinder 5. These instructions are then converted into control instructions for the steering drive 304 and rolling drive 305, which are then transmitted by the measurement and control computer 10.

[0051] When the satellite motion simulator is in a passive floating state, the lifting cylinder 303 lifts the driving wheel 306 to separate it from the air floating platform.

[0052] Figure 5The suction cup brake 4 is designed as a motor-driven lifting and braking mechanism, used for braking and maintaining the position of the satellite motion simulator. The surface is composed of multiple rubber discs with a high coefficient of friction, and the lifting and lowering motion is achieved by a motor-driven lead screw. When the rubber discs contact the air bearing platform, the brake is applied; when they separate, the brake is released.

[0053] The suction cup brake 4 consists of a suction cup brake body 401, an elastic suction cup 402, a lifting motor 404, and a lifting guide rail 405. The suction cup brake body 401 serves as the support structure for the suction cup brake 4 and is secured to the chassis frame 1 via the lifting guide rail 405. Driven by the lifting motor 404, the elastic suction cup 402 can move along the lower surface of the chassis frame 1 and in a direction normal to the air bearing platform. The elastic suction cup 402 can be brought into contact with or separated from the surface of the air bearing platform as needed.

[0054] The present invention can realize controllable motion in three directions within the plane of the air-floating platform, and can measure relative position and posture. When multiple simulators are used, absolute motion and relative motion control can be realized.

[0055] The contents not described in detail in the specification of the present invention belong to the common knowledge of professionals in this field.

Claims

1. A universal chassis for a satellite motion simulator combining air-floating and wheels, characterized by: It comprises a chassis frame (1), an air cushion assembly (2), a steering wheel (3), a suction cup brake (4), a laser distance measuring sensor (5), a main control computer (9) and a measurement and control computer (10); The chassis frame (1) is placed on an air-floating platform, and a flange frame is provided above the chassis frame (1) for mounting a satellite motion simulator; A plurality of air-floating cushions constitute an air-floating cushion group (2) installed below the chassis frame (1), and the plurality of air-floating cushions are evenly distributed on the lower surface of the chassis frame (1); high-pressure air is introduced into the air-floating cushion group (2), forming an air film between the chassis frame (1) and the air-floating platform to balance gravity, and the center of mass of the satellite motion simulator coincides with the centroid of the air-floating support surface formed by the air-floating cushion group (2); The chassis frame (1) is a rectangular frame, and two steering wheels (3) are installed below the chassis frame (1) and are located at two vertices of a diagonal line of the chassis frame (1); after receiving a steering wheel horizontal motion instruction from a measurement and control computer (10), the steering wheel (3) can move horizontally and rotate along the horizontal plane of the air-floating platform; Two laser distance measuring sensors (5) are installed at equal distances on each long frame of the chassis frame (1), and one laser distance measuring sensor (5) is installed on each short frame; the laser distance measuring sensor (5) emits laser light to a calibrated reflective plate, measures the distance between itself and the reflective plate, and sends the distance to a measurement and control computer (10); The measurement and control computer (10) sends the distance data measured by the laser distance measuring sensor to the main control computer (9), and drives the steering wheel to move according to the steering wheel movement instruction calculated by the main control computer (9); and drives the suction cup brake to work according to the braking instruction or working instruction sent by the main control computer (9); The main control computer (9) calculates the current position and attitude of the satellite motion simulator based on the distance measured by the laser ranging sensor (5) arranged on each frame of the chassis frame (1), and performs path trajectory planning based on the target position and attitude to be achieved, decomposing the planned trajectory into the real-time angle, angular velocity, position and speed control quantity of the satellite motion simulator, and generating a steering wheel motion instruction based on the generated direction and sending it to the measurement and control computer (10); when the satellite motion simulator needs position braking, the main control computer (9) sends a braking instruction to the measurement and control computer (10); when the braking ends and the work starts, the main control computer (9) sends a working instruction to the measurement and control computer (10); The suction cup brake (4) is installed at the center of the lower part of the chassis frame (1). After receiving the braking instruction from the measurement and control computer (10), the suction cup brake (4) moves downward to contact the air-floating platform to achieve braking; after receiving the working instruction from the measurement and control computer (10), the suction cup brake (4) moves upward to separate from the air-floating platform, thereby restoring the motion capability of the universal chassis of the satellite motion simulator; The suction cup brake (4) comprises a suction cup brake body (401), an elastic suction cup (402), a lifting motor (404) and a lifting guide rail (405); The suction cup brake body (401) serves as a supporting structure of the suction cup brake (4), and its upper surface is fixed to the chassis frame (1) via a lifting guide rail (405); the suction cup brake body (401) is a frame structure, and elastic suction cups (402) are installed on the lower surfaces of its four corners, and a lifting motor (404) is installed on the upper surface of the suction cup brake body (401); after receiving a braking instruction from the measurement and control computer (10), the lifting motor (404) drives the suction cup brake body (401) to move downward along the lifting guide rail (405) until the elastic suction cup (402) contacts the air floating platform, thereby achieving braking of the universal chassis of the satellite motion simulator; after receiving a working instruction from the measurement and control computer (10), the lifting motor (404) drives the suction cup brake body (401) to move upward along the lifting guide rail (405) until the elastic suction cup (402) is separated from the air floating platform, thereby restoring the motion capability of the universal chassis of the satellite motion simulator; The air flotation pads are installed over constraints, and each air flotation pad contacts the chassis frame using a single-point ball-and-socket method.

2. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: The invention also includes a lead-acid battery pack (6), an uninterruptible power supply (7) and a distribution box (8). The lead-acid battery pack (6), the uninterruptible power supply (7) and the distribution box (8) are all arranged on the chassis frame (1) and together constitute the power supply and distribution system of the satellite motion simulator.

3. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: The uninterruptible power supply (7) provides separate power to the main control computer (9) and the measurement and control computer (10).

4. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: When the mass center of the satellite motion simulator does not coincide with the centroid of the air-floating support surface, a counterweight is added to the chassis frame (1) to adjust the mass center position of the satellite motion simulator.

5. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: The measurement and control computer (10) also establishes wireless communication with the ground test control system.

6. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: The steering wheel (3) comprises a steering wheel body (301), an elastic support (302), a lifting cylinder (303), a steering drive motor (304), a rolling drive motor (305) and a drive wheel (306); The steering wheel body (301) serves as a supporting structure for the steering wheel (3), and its upper surface is fixed to the chassis frame (1) via an elastic support (302); a lifting cylinder (303) is mounted on the upper surface of the steering wheel body (301); a rotor of a rolling drive motor (305) and a driving wheel (306) are coaxially mounted on the lower surface of the steering wheel body (301); the rolling drive motor (305) is used to drive the driving wheel (306) to roll along the lower surface of the chassis frame (1), thereby enabling the chassis frame (1) to move forward or backward on the air-floating platform; and a steering drive motor (304) is mounted on the lower surface of the steering wheel body (301), and drives the stator of the rolling drive motor (305) to rotate via gears, and the rotation of the stator of the rolling drive motor (305) drives the driving wheel (306) to achieve steering.

7. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 6, characterized in that: The lifting cylinder (303) is used to control whether the driving wheel (306) contacts the surface of the air-floating platform: when the satellite motion simulator is in a controlled state, the lifting cylinder (303) drives the steering wheel body (301) to move downward, thereby lowering the driving wheel (306) so that it contacts the air-floating platform; after the air-floating cushion group (2) balances the gravity of the satellite motion simulator through air-floating support, the driving wheel (306) controls the position and posture of the satellite motion simulator on the plane of the air-floating platform under the joint action of the steering drive motor (304) and the rolling drive motor (305); and the motion command of the steering wheel (3) is solved by the main control computer (9) according to the measurement data of the laser ranging sensor (5), and the control command for the steering drive device (304) and the rolling drive device (305) is respectively formed and sent by the measurement and control computer (10); When the satellite motion simulator is required to be in a passive floating state, the lifting cylinder (303) drives the steering wheel body (301) to move upward, lifting the driving wheel (306) to separate it from the air floating platform.

8. The universal chassis of a satellite motion simulator combining air-floating and wheels according to claim 1, characterized in that: The size of the chassis frame (1) is consistent with the actual size of the satellite.

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