Device for measuring moment and tension of on-satellite cable of double-super satellite

Abstract

The invention provides a device for measuring moment and tension of an on-satellite cable of a double-super satellite. The device comprises a gravity balance balloon, a displacement device and a force sensor, the displacement device comprises at least two motion platforms, the two ends of the tested cable are connected to the two different motion platforms respectively, and the gravity balance balloon is used for unloading the gravity borne by the tested cable so as to simulate a weightlessness environment; and at least one force sensor is arranged on any motion platform and is used for measuring torque and / or tension data generated by the tested cable. By adopting the mounting plate with holes, the cable bending simulation device has the characteristics of flexibility in use and convenience in disassembly, and can simulate bending conditions of various cables; the change of the stress condition of the cable when the structure and the mechanism have small displacement and deformation can be simulated by operating the motion platform; the force sensor is high in measurement precision and convenient in data recording, and can meet the measurement of the moment and tension of the connection cable configuration between the double-super satellite cabins.

Description

Technical Field

[0001] The invention relates to the field of mechanical tests in satellite engineering, and in particular to a device for measuring the torque and tension of cables on a dual-super satellite. Background Art

[0002] Traditional satellites mostly use a configuration where the payload platform is directly fixed, and the pointing accuracy and stability of the payload are achieved by the attitude control of the satellite platform. The dual-super satellite uses a high-precision, high-bandwidth non-contact magnetic levitation mechanism to isolate the satellite platform cabin and the payload cabin from each other, achieving a satellite attitude pointing accuracy better than 5×10 -4 Degrees, attitude stability better than 5×10 -6 In order to achieve the double-super technical indicators, the moment and tension tests of the inter-cabin cable when it is bent must be carried out to verify its mechanical properties.

[0003] The existing Chinese patent application document with the announcement number CN107941392B discloses a cable bending moment test platform, which includes a rotation transmission unit, a turntable unit, a slider unit and a test unit. The slider unit includes a guide rail, a slider and a lead screw nut transmission mechanism. The guide rail is fixed on a back plate vertically fixed to the ground. The lead screw nut transmission mechanism includes a lead screw, a transmission nut and a bevel gear transmission pair. The lead screw stands vertically on the side of the back plate, and the transmission nut is fixedly connected to the slider. However, the platform can only test the bending moment generated when the cable is coiled along a cylinder, and the application scenarios are limited.

[0004] The existing Chinese patent application document with publication number CN207703374U discloses a bending moment test device for aerospace cables, including a test bench, a measurement and control box, a temperature control box and an industrial computer; the measurement and control box is connected to the test bench through a control cable and a collection cable, the industrial computer is connected to the measurement and control box through a network cable, and the temperature control box is connected to the test bench through a control cable and a collection cable; the temperature control box controls the electrical components in the test bench to work at a normal operating temperature, the aerospace cable to be tested is installed on the test bench, the industrial computer sends the test command to the measurement and control box through the network cable, the measurement and control box controls the test bench to control the rotation of the aerospace cable and test the torque signal of the aerospace cable, the torque signal and the rotation angle information are output to the measurement and control box, the measurement and control box amplifies, and outputs to the industrial computer after analog-to-digital conversion, and the test bench is placed in a vacuum and low-temperature environment corresponding to the space environment where the aerospace cable is applied. The platform includes a dedicated industrial computer, a measurement and control box and a test bench, but it can also only test the bending moment generated when the cable is coiled along a cylinder.

[0005] The existing Chinese patent application document with publication number CN205981936U discloses a special cable tension bending test device, including a tensile test machine, a fixed pile, a pulley block, a winch, a traction rope, a special cable and a bending test wheel, the pulley block includes a first pulley and a second pulley connected to each other, the tensile test machine is connected to the fixed pile by a steel wire rope, and the steel wire rope is connected to the first pulley, the second pulley and the bending test wheel are connected with a special cable and a steel wire rope, and the special cable is also connected to the winch through the traction rope. Only the performance of the cable under tension can be qualitatively evaluated.

[0006] Currently, there is an urgent need for an experimental device that can meet the torque and tension measurement requirements of the cable connection configuration between dual-supersatellite cabins. Summary of the invention

[0007] In view of the defects in the prior art, an object of the present invention is to provide a device for measuring the torque and tension of the cable on a dual super satellite.

[0008] According to the present invention, a device for measuring the torque and tension of cables on a dual super satellite comprises a gravity balance balloon, a gantry, a displacement device and a force sensor; the displacement device comprises at least two motion platforms, and the two ends of the measured cable are respectively connected to two different motion platforms, and the gravity balance balloon is used to unload the gravity on the measured cable to simulate a weightless environment; the gantry provides support for the installation of the displacement device; at least one force sensor is installed on any motion platform to measure the torque and / or tension data generated by the measured cable.

[0009] Preferably, it further comprises a mounting plate, the force sensor is fixedly connected to the motion platform, the mounting plate is fixedly connected to the mounting plate, and the cable to be tested is fixedly mounted on the mounting plate.

[0010] Preferably, the mounting plate is provided with light holes, the light holes allow bolts and nuts to be installed, and the cable to be tested can be bundled on the bolts.

[0011] Preferably, the motion platform includes translation in three directions and rotation in three directions.

[0012] Preferably, the translation range of the motion platform in any direction is ±10 mm.

[0013] Preferably, the displacement device comprises two relative motion platforms, and the two motion platforms are arranged up and down.

[0014] Preferably, the upper motion platform is fixed on the crossbeam of the gantry.

[0015] Preferably, the height of the gantry is adjustable.

[0016] Preferably, the force sensor is arranged on a horizontal plane of the motion platform.

[0017] Preferably, the force sensor sends the detected torque and / or tension data to the computer via a network port or a serial port.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention adopts the form of a mounting plate with holes, which has the characteristics of flexible use and convenient disassembly, and can simulate the bending conditions of various cables;

[0020] 2. By operating the motion platform, the changes in cable stress conditions when structures and mechanisms undergo slight displacements and deformations can be simulated;

[0021] 3. The force sensor has high measurement accuracy and convenient data recording, which can meet the torque and tension measurement of the cable connection configuration between the dual-super satellite cabins. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 This is a schematic diagram of a horizontal measuring device mainly embodied in the present invention;

[0024] Figure 2 This is a schematic diagram of a vertical measuring device mainly embodied in the present invention.

[0025] Figure 1 As shown in: 1. Force sensor; 2. Cable under test; 3. Motion platform; 4. Mounting plate; 6. Gravity balance balloon;

[0026] Figure 2 As shown in the figure: 1. Force sensor; 2. Cable under test; 3. Motion platform; 4. Mounting plate; 5. Gantry. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0028] Embodiment 1

[0029] like Figure 1As shown, a device for measuring the torque and tension of cables on dual super satellites provided according to the present invention includes a gravity balance balloon 6, a displacement device and a force sensor 1; the displacement device includes at least two motion platforms 3, and the two ends of the cable 2 under test are respectively connected to two different motion platforms 3, and the gravity balance balloon 6 is used to unload the gravity exerted on the cable 2 under test to simulate a weightless environment; at least one force sensor 1 is installed on any motion platform 3 to measure the torque and / or tension data generated by the cable 2 under test.

[0030] Specifically, the displacement device is installed on the frame, and the gravity balance balloon 6 is connected to the cable 2 under test. The gravity balance balloon 6 is used to unload the gravity of the cable 2 under test to simulate a weightless environment. The displacement device is used to generate a small displacement at the cable bundling position. The force sensor 1 can measure the torque and tension data generated by the cable, and send it to the computer through the network port or serial port for real-time display.

[0031] Furthermore, it also includes a mounting plate 4, the force sensor 1 is fixedly connected to the motion platform 3, the mounting plate 4 is fixedly connected to the mounting plate 4, and the cable 2 to be tested is fixedly installed on the mounting plate 4. The mounting plate 4 is provided with a light hole, and the light hole allows the installation of bolts and nuts. The cable 2 to be tested can be tied to the bolt to achieve the installation and fixation of the cable. The cable can simulate different bending conditions by being tied at different positions. The diameter of the light hole and the length of the bolt are adjusted according to the thickness and length of the tied cable.

[0032] Furthermore, the motion platform 3 includes translation in three directions and rotation in three directions. The translation range of the motion platform 3 in any direction is ±10 mm. In some feasible embodiments, a three-degree-of-freedom motion platform can also be used to simulate the bending of the cable.

[0033] It should be further explained that the measurement accuracy of the force sensor 1 is 0.01N, and the torque measurement accuracy is 0.001Nm. The sensor is connected to the computer via a network cable or a 485 serial port cable and the measured data is displayed through the software. The data can be recorded manually or automatically by the software.

[0034] The technical solution of the present application provides a new device for measuring cable torque and tension. It adopts the form of a perforated mounting plate 4, which is flexible to use and easy to disassemble, and can simulate the bending conditions of various cables. By operating the motion platform 3, the changes in the cable force conditions when the structure and mechanism have slight displacement and deformation can be simulated. The six-dimensional force sensor 1 has high measurement accuracy and convenient data recording. It can meet the torque and tension measurement of the dual-super satellite inter-cabin connection cable configuration.

[0035] Embodiment 2

[0036] like Figure 2As shown, in another feasible embodiment, the displacement device includes two relative motion platforms 3, and the two motion platforms 3 are arranged up and down. The motion platform 3 located above is fixed on the crossbeam of the gantry 5. The height of the gantry 5 can be adjusted to adjust the distance between the two motion platforms 3. The two motion platforms 3 generate displacement by rotating the micrometer to simulate different bending conditions of the cable under the same bundling method. The force sensor 1 is arranged on the horizontal plane of the motion platform 3. The force sensor 1 sends the detected torque and / or tension data to the computer through the network port or serial port. Specifically, the force sensor 1 is connected to the computer through a network cable or an RS458 serial port cable, and the measured force and torque data are transmitted to a dedicated software interface for display.

[0037] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A device for measuring the torque and tension of cables on a dual super satellite, characterized in that: It comprises a gravity balance balloon (6), a displacement device and a force sensor (1); The displacement device comprises at least two motion platforms (3), two ends of the cable under test (2) are respectively connected to two different motion platforms (3), and the gravity balance balloon (6) is used to unload the gravity exerted on the cable under test (2) to simulate a weightless environment; At least one force sensor (1) is installed on any motion platform (3) to measure the torque and / or tension data generated by the measured cable (2).

2. The device for measuring the torque and tension of the cable on a dual super satellite according to claim 1, characterized in that: It also comprises a mounting plate (4), the force sensor (1) is fixedly connected to the motion platform (3), the mounting plate (4) is fixedly connected to the force sensor (1), and the measured cable (2) is fixedly mounted on the mounting plate (4).

3. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 2, characterized in that: The mounting plate (4) is provided with a light hole, wherein the light hole allows bolts and nuts to be installed, and the cable (2) to be tested can be bundled on the bolts.

4. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 1, characterized in that: The motion platform (3) includes translation in three directions and rotation in three directions.

5. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 1, characterized in that: The translation range of the motion platform (3) in any direction is ±10 mm.

6. The device for measuring the torque and tension of the cable on a dual super satellite according to claim 1, characterized in that: The displacement device comprises two relative motion platforms (3), and the two motion platforms (3) can be arranged vertically or horizontally.

7. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 6, characterized in that: The motion platform (3) located above is fixed on the crossbeam of the gantry (5).

8. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 7, characterized in that: The height of the gantry (5) can be adjusted.

9. The device for measuring the torque and tension of the cable on a dual super satellite as claimed in claim 1, characterized in that: The force sensor (1) is arranged on a horizontal plane of the motion platform (3).

10. The device for measuring the torque and tension of the cable on a dual super satellite according to claim 1, characterized in that: The force sensor (1) sends the detected torque and / or tension data to a computer via a network port or a serial port.

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