Satellite eccentric two-dimensional turntable payload ground deployment test active unloading device

Abstract

This invention provides an active unloading device for a satellite eccentric two-dimensional turntable load ground deployment test. It includes a fixed frame connected to a truss, a movable component positioned below the fixed frame, a connecting back frame securely connected to the turntable mechanism via lifting points, a transfer frame located on the connecting back frame near the drive and driven shafts of the turntable mechanism, and a center-of-gravity adjustment disk on each transfer frame. A screw adjustment component is rotatably connected to each center-of-gravity adjustment disk, connected to a lifting beam, and a suspension component connected to the middle of the lifting beam. The suspension component connects the lifting beam and the movable component, allowing lateral and / or longitudinal movement of the suspension component. Unloading via connection to the satellite two-dimensional turntable load improves ease of use, eliminates the need for precise balancing and additional moving counterweights, and performs unloading at the actual center-of-gravity location, improving the accuracy of simulating on-orbit zero-gravity deployment conditions and obtaining more realistic motion parameters.

Description

Technical Field

[0001] This invention relates to the field of on-board unloading and deployment test technology for two-dimensional turntable payloads, and more specifically, to an active unloading device for ground deployment test of satellite eccentric two-dimensional turntable payloads. Background Technology

[0002] The two-dimensional turntable payload, also known as the satellite optical camera rotation mechanism, is a device for satellites to observe and image from all angles in space. Due to limitations such as the satellite's weight envelope, the turntable's center of mass may be off-center around the rotation axis. Ground testing requires unloading the turntable to achieve rotation of the azimuth and pitch axes.

[0003] A Chinese patent application with publication number CN111142573A discloses a two-dimensional turntable-assisted lighting device for use in a microgravity environment. The device includes an unfolding and locking mechanism, a support rod, an electrical connector, an azimuth turntable, a pitch turntable, a pyrotechnic cutting mechanism I, a lamp body, and a pyrotechnic cutting mechanism II. The unfolding and locking mechanism is fixedly connected to one end of the support rod via a flange on the mechanism. The other end of the support rod is fixedly connected to one end of the azimuth turntable. The electrical connector is fixedly connected to the azimuth turntable. The pitch turntable is fixedly connected to the other end of the azimuth turntable. The pyrotechnic cutting mechanism I is fixedly connected to the pitch turntable. The lamp body is fixedly connected to the support of the pitch turntable. The pyrotechnic cutting mechanism II is fixedly connected to the lamp body.

[0004] When conducting ground deployment tests on traditional two-dimensional turntable mechanisms, the center of mass is placed at the axis of rotation for unloading and deployment using a balancing method. Ground tests cannot obtain true rotational performance parameters. This method requires repeated balancing, imposes many additional mass requirements on the mechanism's motion, and the additional motion parameters such as moment of inertia, velocity, and acceleration cannot be accurately obtained. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide an active unloading device for satellite eccentric two-dimensional turntable load ground deployment tests.

[0006] According to the present invention, an active unloading device for a satellite eccentric two-dimensional turntable load ground deployment test includes a center of mass adjustment disk, a transfer frame, a connecting back frame, a screw adjustment assembly, a lifting beam, a hanging assembly, a moving assembly, and a fixed frame. The fixed frame is connected to a truss, and the moving assembly is disposed on the lower side of the fixed frame. The connecting back frame is fastened to the lifting points of the turntable mechanism. One transfer frame is respectively provided in the region of the connecting back frame near the driving shaft and driven shaft of the turntable mechanism. One center of mass adjustment disk is provided on each transfer frame. One screw adjustment assembly is rotatably connected to each center of mass adjustment disk. One end of the screw adjustment assembly away from the center of mass adjustment disk is rotatably connected to one end of the lifting beam, and the other end of the screw adjustment assembly away from the center of mass adjustment disk is rotatably connected to the other end of the lifting beam. The hanging assembly is connected to the middle of the lifting beam. The hanging assembly connects the lifting beam and the moving assembly, and the moving assembly allows the hanging assembly to move laterally and / or longitudinally.

[0007] Preferably, the center of gravity adjusting disk includes an adjusting arc groove, a movable slider, and a rotating hole; the adapter frame includes an indexing screw hole and a rotating screw hole; the rotating hole is rotatably connected to the rotating screw hole through a connector; the adjusting arc groove communicates with any indexing screw hole and is fastened to it by a fastener; the movable slider slides radially along the center of gravity adjusting disk, and the movable slider is fastened to the center of gravity adjusting disk by a fastener; the connection point between the screw adjusting assembly and the center of gravity adjusting disk is located on the movable slider.

[0008] Preferably, the connecting shaft between the center of mass adjustment disc and the screw adjustment assembly is a center of mass shaft.

[0009] Preferably, the rotational connection between the screw adjusting assembly and the center of gravity adjusting disc, and the rotational connection between the screw adjusting assembly and the lifting beam, are both via spherical bearings; the spherical bearing includes a spherical convex shaft, a spherical ring, and a spherical connecting hole, one end of the spherical convex shaft extends into the spherical ring and is ball-jointed to the spherical ring, the spherical connecting hole is fastened to the spherical ring, and the central axis of the spherical connecting hole is perpendicular to the central axis of the spherical ring; the spherical connecting hole is fastened to the screw adjusting assembly, and the spherical convex shaft is fastened to the center of gravity adjusting disc or the lifting beam.

[0010] Preferably, the screw adjusting assembly includes a right-hand screw, a first connecting sleeve, and a left-hand screw. One end of the right-hand screw extends into the first connecting sleeve from one side and is threadedly connected thereto. One end of the left-hand screw extends into the first connecting sleeve from the other side and is threadedly connected thereto.

[0011] Preferably, the suspension assembly includes a rotating ring, a damping spring, a tension sensor, a connecting wire rope, and an active suspension connected sequentially from bottom to top; the lower end of the rotating ring is rotatably connected to the middle of the suspension beam, and the active suspension includes a constant force device and a first trolley; the constant force device drives the connecting wire rope to wind up or unwind, and the first trolley is slidably connected to the moving assembly.

[0012] Preferably, the moving component includes a transverse guide rail and a longitudinal guide rail; the transverse guide rail includes a first guide rail and a second trolley, the first trolley being slidably connected to the first guide rail; the longitudinal guide rail includes a smooth tube, both ends of the smooth tube being fastened to a fixed frame respectively, the length direction of the smooth tube being perpendicular to the length direction of the first guide rail, and the second trolley being slidably connected to the smooth tube.

[0013] Preferably, one second trolley is fastened to each end of the first guide rail; two smooth tubes are arranged in parallel at intervals, and the two second trolleys are slidably connected to the two smooth tubes respectively.

[0014] Preferably, the smooth tube and the fixed frame are connected by an adjuster, which includes a right-hand bolt, a right-hand nut, a second connecting sleeve, a left-hand nut, and a left-hand bolt. The right-hand nut and the left-hand nut are respectively fastened to both ends of the second connecting sleeve. The threaded end of the right-hand bolt is threadedly engaged with the right-hand nut and extends into the second connecting sleeve. The threaded end of the left-hand bolt is threadedly engaged with the left-hand nut and extends into the second connecting sleeve. The right-hand nut is connected to the smooth tube, and the left-hand nut is connected to the fixed frame.

[0015] Preferably, the smooth tube and the fixed frame are connected by an adjuster, which includes a right-hand bolt, a right-hand nut, a second connecting sleeve, a left-hand nut, and a left-hand bolt. The right-hand nut and the left-hand nut are respectively fastened to both ends of the second connecting sleeve. The threaded end of the right-hand bolt is threadedly engaged with the right-hand nut and extends into the second connecting sleeve. The threaded end of the left-hand bolt is threadedly engaged with the left-hand nut and extends into the second connecting sleeve. The right-hand nut is connected to the fixed frame, and the left-hand nut is connected to the smooth tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention connects the center of gravity adjustment plate, joint bearing, adapter frame, connecting back frame, screw adjustment assembly, lifting beam, rotating lifting ring, damping spring, tension sensor, active suspension, transverse guide rail, longitudinal guide rail, adjuster, and fixed frame to the satellite two-dimensional turntable load for unloading. This improves ease of use, eliminates the need for precise balancing and additional motion counterweights, and unloads at the actual center of gravity position. This helps improve the accuracy of simulating zero-gravity deployment conditions in orbit and obtains more realistic motion parameters.

[0018] 2. The present invention, through an active unloading device, is convenient and adjustable, and can realize the azimuth rotation and pitch rotation functions after the accurate center of mass unloading of the eccentric two-dimensional turntable load on the ground, which can meet the ground deployment test of the eccentric two-dimensional turntable load.

[0019] 3. The present invention uses a screw adjustment assembly, a lifting beam and a hanging assembly to maintain a constant hanging force on a two-dimensional turntable, while realizing the rotation function of the turntable's azimuth axis and pitch axis, and realizing steel wire displacement compensation during the movement. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the active unloading device for the ground deployment test of the satellite eccentric two-dimensional turntable load, which is the main feature of this invention.

[0022] Figure 2 This is a schematic diagram illustrating the main structure of the connecting back frame of the present invention;

[0023] Figure 3 This is a schematic diagram illustrating the structure of the adapter frame, which is the main feature of this invention.

[0024] Figure 4 This is a schematic diagram illustrating the structure of the centroid adjustment disk, which is the main feature of this invention.

[0025] Figure 5 This is a schematic diagram illustrating the structure of the spherical bearing, which is the main feature of this invention.

[0026] Figure 6 This is a schematic diagram illustrating the structure of the screw adjustment assembly, which is the main feature of this invention.

[0027] Figure 7 This is a schematic diagram illustrating the structure of the lifting beam device, which is the main feature of this invention.

[0028] Figure 8 This is a schematic diagram illustrating the structure of the rotating lifting ring device, which is the main feature of this invention.

[0029] Figure 9 This is a schematic diagram illustrating the structure of the damping spring, tension sensor, and active suspension of the present invention.

[0030] Figure 10 This is a schematic diagram illustrating the structure of the transverse guide rail device, which is the main feature of this invention.

[0031] Figure 11 This is a schematic diagram illustrating the structure of the longitudinal guide rail device, which is the main feature of this invention.

[0032] Figure 12This is a schematic diagram illustrating the structure of the regulator device, which is the main feature of this invention.

[0033] Figure 13 This is a structural schematic diagram of the fixing frame device, which is the main feature of this invention.

[0034] As shown in the figure:

[0035] Center of gravity adjustment plate 1, clamping back frame 41, thrust bearing 72, screw hole 121

[0036] Adjustable groove 1001, drive shaft back bracket 42, eye bolt 73, smoothing tube 122

[0037] 1002 movable slider, 43 lifting point back frame, 74 locking nut, 13 adjuster Rotating hole 1003 Driven shaft back bracket 44 Damping spring 8 Right-hand bolt 131 2. Spherical plain bearing; 5. Screw adjusting assembly; 9. Tension sensor; 132. Right-hand nut. Joint convex shaft 21, right-hand screw 51, active hanger 10, second connecting sleeve 133 Joint ring 22, first connecting sleeve 52, connecting wire rope 101, left-hand nut 134 Joint connection hole 23, left-hand screw 53, constant force device 102, left-hand bolt 135 Adapter frame 3, lifting beam 6, first trolley 103, fixed frame 14

[0038] First connecting hole 31, spherical bearing screw hole 61, pusher transverse guide rail 11; Second connecting hole 141 Indexing screw hole 32, force shaft hole 62, second pulley 111, square tube 142

[0039] Rotating screw hole 33, rotating lifting eye 7, first guide rail 112, waist-shaped groove 143

[0040] Connecting back frame 4, connecting shaft 71, longitudinal guide rail 12, square hole 144 Detailed Implementation

[0041] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0042] like Figure 1As shown, an active unloading device for a satellite eccentric two-dimensional turntable load ground deployment test according to the present invention includes a center of mass adjustment plate 1, a transition frame 3, a connecting back frame 4, a screw adjustment assembly 5, a lifting beam 6, a hanging assembly, a moving assembly, and a fixed frame 14. The fixed frame 14 is connected to a truss, and the moving assembly is disposed on the lower side of the fixed frame 14. The connecting back frame 4 is fastened to the lifting points of the turntable mechanism. One transition frame 3 is respectively provided in the region of the connecting back frame 4 near the driving shaft and driven shaft of the turntable mechanism. One center of mass adjustment plate 1 is provided on each transition frame 3. One screw adjustment assembly 5 is rotatably connected to each center of mass adjustment plate 1. One end of one screw adjustment assembly 5 away from the center of mass adjustment plate 1 is rotatably connected to one end of the lifting beam 6, and the other end of the screw adjustment assembly 5 away from the center of mass adjustment plate 1 is rotatably connected to the other end of the lifting beam 6. The hanging assembly is connected to the middle of the lifting beam 6 and connects the lifting beam 6 and the moving assembly. The moving assembly allows the hanging assembly to move laterally and / or longitudinally.

[0043] The center of gravity adjustment plate 1, the adapter frame 3, and the connecting back frame 4 are mechanically connected to the eccentric two-dimensional turntable, completing the precise adjustment of the center of gravity. The connecting shaft 71 between the center of gravity adjustment plate 1 and the screw adjustment assembly 5 is the center of gravity axis. The screw adjustment assembly 5, the lifting beam 6, and the hanging assembly are used to maintain a constant hanging force on the two-dimensional turntable, while realizing the rotation function of the turntable's azimuth and pitch axes, and achieving steel wire displacement compensation during the movement. The moving assembly provides a two-dimensional plane sliding function for the entire unloading device, thereby realizing the active unloading deployment test of the eccentric two-dimensional turntable on the ground.

[0044] like Figure 1 and Figure 2 As shown, specifically, the connecting back frame 4 includes a clamping back frame 41, a drive shaft back frame 42, a lifting point back frame 43, and a driven shaft back frame 44. The clamping back frame 41 is mechanically fastened to the clamping point interface of the turntable, the lifting point back frame 43 is mechanically fastened to the lifting point interface of the turntable, and both the drive shaft back frame 42 and the driven shaft back frame 44 are connected to the rotating shaft of the turntable. The entire connecting back frame 4 is rigidly connected to the moving parts of the turntable, providing a center of mass interface transition and stiffness maintenance function during the unloading test.

[0045] like Figure 1 and Figure 3 As shown, the adapter frame 3 includes a first connecting hole 31, an indexing screw hole 32, and a rotating screw hole 33. There are two adapter frames 3, which are respectively installed in the drive shaft area and driven shaft area of ​​the connecting back frame 4. The adapter frame 3 is made of integrally hollowed-out aluminum alloy and is reinforced with diagonal ribs to reduce weight. The indexing hole and rotating screw hole 33 are used to install the center of gravity adjustment plate 1 to achieve center of gravity position adjustment. The first connecting hole 31 and fasteners cooperate to securely connect the adapter frame 3 to the connecting back frame 4.

[0046] like Figure 1 , Figure 3 as well as Figure 4 As shown, the center of gravity adjustment disk 1 includes an adjustment arc groove 1001, a movable slider 1002, and a rotating hole 1003. The rotating hole 1003 is rotatably connected to the rotating screw hole 33 via a connector. The adjustment arc groove 1001 communicates with any indexing screw hole 32 and is fastened by fasteners. The movable slider 1002 slides radially along the center of gravity adjustment disk 1 and is fastened to the center of gravity adjustment disk 1 by fasteners. The connection point between the screw adjustment assembly 5 and the center of gravity adjustment disk 1 is located on the movable slider 1002. The center of gravity adjustment disk 1 can be adjusted and fastened at a certain angle along the axial direction of the rotating hole 1003 and the adjustment arc groove 1001. At the same time, the movable slider 1002 can be adjusted and fastened radially, achieving center of gravity adjustment in two directions. It can be made of aluminum alloy.

[0047] like Figure 5 As shown, the rotational connection between the screw adjusting assembly 5 and the center of gravity adjusting disk 1, and the rotational connection between the screw adjusting assembly 5 and the lifting beam 6, are both achieved through the spherical bearing 2. The spherical bearing 2 includes a spherical convex shaft 21, a spherical ring 22, and a spherical connecting hole 23. One end of the spherical convex shaft 21 extends into the spherical ring 22 and is ball-jointed to it. The spherical connecting hole 23 is securely connected to the spherical ring 22, and the central axis of the spherical connecting hole 23 is perpendicular to the central axis of the spherical ring 22. The spherical connecting hole 23 is securely connected to the screw adjusting assembly 5, and the spherical convex shaft 21 is securely connected to the center of gravity adjusting disk 1 or the lifting beam 6. The spherical convex shaft 21 can rotate around the end face of the spherical ring 22, and the spherical connecting hole 23 is installed perpendicular to the spherical ring 22, thereby realizing the ball-jointed movement of the spherical convex shaft 21 and the spherical connecting hole 23. It has a universal rotation function, used to realize the two-dimensional movement of the turntable.

[0048] like Figure 6 As shown, the screw adjustment assembly 5 includes a right-hand screw 51, a first connecting sleeve 52, and a left-hand screw 53. One end of the right-hand screw 51 extends into the first connecting sleeve 52 from one side and is threaded thereto. One end of the left-hand screw 53 extends into the first connecting sleeve 52 from the other side and is threaded thereto. By turning the first connecting sleeve 52 left or right, the distance between the joint bearing 2 on the lifting beam 6 and the joint bearing 2 on the center of gravity adjustment plate 1 can be adjusted, ensuring that the hanging force on both sides is consistent.

[0049] like Figure 7 As shown, the lifting beam 6 includes a spherical bearing screw hole 61 and a thrust shaft hole 62. One spherical bearing screw hole 61 is provided at each end of the lifting beam 6 for mounting the spherical bearing 2. One thrust shaft hole 62 is provided in the middle of the length of the lifting beam 6 for rotatable connection with the suspension assembly.

[0050] like Figure 1 and Figure 8 As shown, the suspension assembly includes, from bottom to top, a rotating lifting ring 7, a damping spring 8, a tension sensor 9, a connecting steel wire rope 101, and an active suspension 10. The lower end of the rotating lifting ring 7 is rotatably connected to the middle of the lifting beam 6. The active suspension 10 includes a constant force device 102 and a first pulley 103. The constant force device 102 drives the connecting steel wire rope 101 to wind up or unwind, and the first pulley 103 is slidably connected to the moving assembly.

[0051] The rotating eye 7 includes a connecting shaft 71, a thrust bearing 72, an eye bolt 73, and a locking nut 74. The thrust bearing 72 is embedded in and rotatably connected to the thrust shaft hole 62, enabling the rotation of the lifting beam 6. The eye bolt 73 and the locking nut 74 are both located at the end of the connecting shaft 71 away from the thrust bearing 72, ensuring a reliable connection between the connecting shaft 71 and the wire rope.

[0052] like Figure 1 and Figure 9 As shown, the damping spring 8 is used for shock absorption and buffering during unloading, and its selection needs to be based on the hanging force. The tension sensor 9 is used to monitor changes in the hanging force in real time to ensure the safety of the unloading test. The constant force device 102 can be driven by a motor or can be a device that outputs a constant force and has a certain displacement compensation, such as a constant force spring. Its lower end is connected to the lifting beam 6 via a steel wire rope, and its upper end is equipped with the first pulley 103.

[0053] like Figure 1 , Figure 10 , Figure 11 as well as Figure 12 As shown, the moving component includes a transverse guide rail 11 and a longitudinal guide rail 12. The transverse guide rail 11 includes a first guide rail 112 and a second trolley 111, with the first trolley 103 slidably connected to the first guide rail 112. The longitudinal guide rail 12 includes a smooth tube 122, with both ends of the smooth tube 122 being fastened to the fixed frame 14. The length direction of the smooth tube 122 is perpendicular to the length direction of the first guide rail 112, and the second trolley 111 is slidably connected to the smooth tube 122. One second trolley 111 is fastened to each end of the first guide rail 112. Two smooth tubes 122 are arranged parallel to each other, and two second trolleys 111 are slidably connected to the two smooth tubes 122 respectively. The transverse guide rail 11 enables the active suspension 10 to slide along the transverse guide rail 11 and along the longitudinal guide rail 12.

[0054] The smooth tube 122 and the fixed frame 14 are connected by an adjuster 13. The longitudinal guide rail 12 includes a screw hole 121 for connecting to the adjuster 13. The adjuster 13 includes a right-hand bolt 131, a right-hand nut 132, a second connecting sleeve 133, a left-hand nut 134, and a left-hand bolt 135.

[0055] One feasible implementation is as follows: A right-handed nut 132 and a left-handed nut 134 are respectively fastened to both ends of the second connecting sleeve 133. The threaded end of the right-handed bolt 131 engages with the right-handed nut 132 and extends into the second connecting sleeve 133. The threaded end of the left-handed bolt 135 engages with the left-handed nut 134 and extends into the second connecting sleeve 133. The right-handed nut 132 is connected to the smooth tube 122, and the left-handed nut 134 is connected to the fixed frame 14. After the nuts are fastened to the longitudinal guide rail 12 and the fixed frame 14, the horizontality of the longitudinal guide rail 12 can be adjusted by adjusting the second connecting sleeve 133.

[0056] Another feasible implementation is as follows: the right-hand nut 132 and the left-hand nut 134 are respectively fastened to both ends of the second connecting sleeve 133, the threaded end of the right-hand bolt 131 is threadedly engaged with the right-hand nut 132 and extends into the second connecting sleeve 133, the threaded end of the left-hand bolt 135 is threadedly engaged with the left-hand nut 134 and extends into the second connecting sleeve 133; the right-hand nut 132 is connected to the fixing frame 14, and the left-hand nut 134 is connected to the smooth tube 122.

[0057] like Figure 1 and Figure 13 As shown, the fixed frame 14 includes a second connecting hole 141, a square tube 142, a waist-shaped groove 143, and a square hole 144. It is connected and fixed to the truss through the second connecting hole 141, and the waist-shaped groove 143 is used to adjust the horizontal position of the adjuster 13 to achieve parallelism of the two longitudinal guide rails 12.

[0058] After being connected to the satellite 2D turntable load via a centroid adjustment disc 1, joint bearing 2, adapter frame 3, connecting back frame 4, screw adjustment assembly 5, lifting beam 6, rotating lifting ring 7, damping spring 8, tension sensor 9, active suspension 10, transverse guide rail 11, longitudinal guide rail 12, adjuster 13, and fixing frame 14, the load is unloaded. Compared with traditional eccentric 2D turntables that require balancing before unloading tests, this method is more practical, eliminating the need for precise balancing and additional motion counterweights. Unloading occurs at the actual centroid position, better simulating zero-gravity deployment conditions in orbit and obtaining more realistic motion parameters. It is convenient and adjustable, enabling accurate centroid unloading of the eccentric 2D turntable load on the ground, allowing for azimuth and pitch rotation, and meeting the requirements for ground deployment tests of eccentric 2D turntable loads.

[0059] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0060] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A satellite eccentric two-dimensional rotary table load ground deployment test active unloading device, characterized in that, The device comprises a center-of-mass adjusting disc (1), an adapter frame (3), a connecting back frame (4), a screw rod adjusting assembly (5), a hanging beam (6), a hanging assembly, a moving assembly, and a fixed frame (14) connected with a truss, wherein the moving assembly is arranged on the lower side of the fixed frame (14). The connecting back frame (4) is fastened to the lifting point of the rotary table mechanism, and the adapter frame (3) is arranged with one adapter frame (3) near the driving shaft and the driven shaft of the rotary table mechanism. The screw rod adjusting assembly (5) is rotatably connected with one screw rod adjusting assembly (5) on any center-of-mass adjusting disc (1), one end of the screw rod adjusting assembly (5) is rotatably connected with one end of the hanging beam (6), and the other end of the screw rod adjusting assembly (5) is rotatably connected with the other end of the hanging beam (6). The hanging assembly is connected with the middle part of the hanging beam (6), the hanging assembly is connected with the hanging beam (6) and the moving assembly, and the moving assembly allows the hanging assembly to move horizontally and / or longitudinally. The center-of-mass adjusting disc (1) comprises an adjusting arc groove (1001), a moving sliding block (1002), and a rotating hole (1003), and the adapter frame (3) comprises a divided screw hole (32) and a rotating screw hole (33). The rotating hole (1003) is rotatably connected with the rotating screw hole (33) through a connecting piece, the adjusting arc groove (1001) is in communication with any divided screw hole (32) and is fastened by a fastener, the moving sliding block (1002) slides along the radial direction of the center-of-mass adjusting disc (1), and the moving sliding block (1002) is fastened with the center-of-mass adjusting disc (1) by a fastener. The connecting point of the screw rod adjusting assembly (5) and the center-of-mass adjusting disc (1) is located on the moving sliding block (1002).

2. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test according to claim 1, characterized in that, The connecting shaft of the center-of-mass adjusting disc (1) and the screw rod adjusting assembly (5) is a center-of-mass shaft.

3. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test of claim 1, wherein, The rotating connection of the screw rod adjusting assembly (5) and the center-of-mass adjusting disc (1) and the rotating connection of the screw rod adjusting assembly (5) and the hanging beam (6) are both achieved by a joint bearing (2). The joint bearing (2) comprises a joint convex shaft (21), a joint shaft ring (22), and a joint connecting hole (23), one end of the joint convex shaft (21) extends into the joint shaft ring (22) and is ball-hinged with the joint shaft ring (22), the joint connecting hole (23) is fastened with the joint shaft ring (22), and the central axis of the joint connecting hole (23) and the central axis of the joint shaft ring (22) are perpendicular to each other. The joint connecting hole (23) is fastened with the screw rod adjusting assembly (5), and the joint convex shaft (21) is fastened with the center-of-mass adjusting disc (1) or the hanging beam (6).

4. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test according to claim 1, characterized in that, The screw adjusting assembly (5) comprises a right-hand screw (51), a first connecting sleeve (52) and a left-hand screw (53), one end of the right-hand screw (51) extends into the first connecting sleeve (52) from one side of the first connecting sleeve (52) and is threadedly connected with the first connecting sleeve (52), and one end of the left-hand screw (53) extends into the first connecting sleeve (52) from the other side of the first connecting sleeve (52) and is threadedly connected with the first connecting sleeve (52).

5. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test of claim 1, wherein, The hanging assembly comprises, from bottom to top, a rotating hanging ring (7), a damping spring (8), a tension sensor (9), a connecting steel wire rope (101) and a driving hanging device (10); The lower end of the rotating hanging ring (7) is rotationally connected with the middle part of the hanging beam (6), the driving hanging device (10) comprises a constant force device (102) and a first trolley (103), the constant force device (102) drives the connecting steel wire rope (101) to be wound or unwound, and the first trolley (103) is slidably connected with the moving assembly.

6. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test of claim 5, wherein, The moving assembly comprises a transverse guide rail (11) and a longitudinal guide rail (12); The transverse guide rail (11) comprises a first guide rail (112) and a second trolley (111), and the first trolley (103) is slidably connected with the first guide rail (112); The longitudinal guide rail (12) comprises a smooth tube (122), both ends of the smooth tube (122) are fixedly connected with a fixed frame (14), the length direction of the smooth tube (122) is perpendicular to the length direction of the first guide rail (112), and the second trolley (111) is slidably connected with the smooth tube (122).

7. The active unloading device for the satellite eccentric two-dimensional turntable load ground deployment test according to claim 6, one second trolley (111) is fixedly connected with each end of the first guide rail (112); Two smooth tubes (122) are arranged in parallel and at intervals, and the two second trolleys (111) are slidably connected with the two smooth tubes (122), respectively.

8. The active unloading device for satellite eccentric two-dimensional turntable payload ground deployment test of claim 6, wherein, The smooth tube (122) and the fixed frame (14) are connected through an adjuster (13), and the adjuster (13) comprises a right-hand screw (131), a right-hand nut (132), a second connecting sleeve (133), a left-hand nut (134) and a left-hand screw (135); The right-hand nut (132) and the left-hand nut (134) are fixedly installed at both ends of the second connecting sleeve (133), respectively, the threaded end of the right-hand screw (131) is threadedly matched with the right-hand nut (132) and extends into the second connecting sleeve (133), and the threaded end of the left-hand screw (135) is threadedly matched with the left-hand nut (134) and extends into the second connecting sleeve (133); The right-hand nut (132) is connected with the smooth tube (122), and the left-hand nut (134) is connected with the fixed frame (14).

9. The active unloading device for satellite off-center two-dimensional turntable payload ground deployment test of claim 6, wherein, The smooth tube (122) and the fixed frame (14) are connected through an adjuster (13), and the adjuster (13) comprises a right-hand screw (131), a right-hand nut (132), a second connecting sleeve (133), a left-hand nut (134) and a left-hand screw (135); The right-handed nut (132) and the left-handed nut (134) are respectively fastened and installed at two ends of the second connecting sleeve (133), the threaded end of the right-handed bolt (131) is threadedly matched with the right-handed nut (132) and extends into the second connecting sleeve (133), and the threaded end of the left-handed bolt (135) is threadedly matched with the left-handed nut (134) and extends into the second connecting sleeve (133); the right-handed nut (132) is connected with the fixed frame (14), and the left-handed nut (134) is connected with the smooth tube (122).

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