Satellite communication antenna test rotating platform

Abstract

The invention is applicable to the technical field of satellite communication antenna testing, and provides a satellite communication antenna testing rotating platform, which comprises a base, a substrate and a mounting table for placing a satellite communication antenna to be tested, and is characterized in that the substrate is arranged on the base; a rotating motor for driving the mounting table to rotate is arranged on the supporting plate; the angle adjusting mechanism is used for controlling the working angle of the supporting plate, and the angle adjusting mechanism is arranged on the base plate; through cooperative arrangement of the supporting plate, the angle adjusting mechanism and the fixing mechanisms, the problems that when an existing satellite communication antenna test rotating platform is used for angle adjustment, manual adjustment is mostly needed, a fixing structure is lacked, and the angle adjustment efficiency is high are solved. The problems that in severe weather such as severe convection and the like, the angle is extremely easy to shake, the angle is deviated, and the test precision is influenced are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of satellite communication antenna testing, and particularly relates to a satellite communication antenna testing rotating platform. BACKGROUND

[0002] In a modern communication system, satellite communication has become a core supporting technology in key fields such as aerospace, ocean transportation, emergency rescue and remote area communication, due to its advantages of wide coverage, long communication distance and being not limited by geographical environment. With the rapid development of satellite communication towards high throughput, low latency and miniaturization, more stringent requirements are put forward for the performance indicators of satellite communication antennas, among which the beam pointing accuracy, gain stability, polarization purity and signal transmission efficiency under different attitudes of the antenna directly determine the overall communication quality of the satellite communication system. To ensure that the satellite communication antenna meets the design standard in actual working conditions, comprehensive performance testing is required before shipment and during deployment and maintenance, and the performance of the test rotating platform as the core bearing and attitude adjustment equipment of the antenna testing system directly affects the accuracy and reliability of the test data.

[0003] The existing satellite communication antenna test rotating platform mostly needs manual adjustment when adjusting the angle, and lacks a fixing structure, so it cannot be further fixed after the angle adjustment is completed. In strong convection and other severe weather, it is easy to sway, causing angle deviation and affecting the test accuracy. Therefore, in view of the above status, it is urgent to provide a satellite communication antenna test rotating platform to overcome the deficiencies in current actual applications. SUMMARY

[0004] The present application aims to provide a satellite communication antenna test rotating platform to solve the problems in the background art.

[0005] The present application is implemented as follows: a satellite communication antenna test rotating platform, comprising: a base, a substrate and a mounting table for placing a satellite communication antenna to be tested, the substrate being arranged on the base; a support plate, the support plate being provided with a rotating motor for driving the mounting table to rotate; an angle adjustment mechanism for controlling the working angle of the support plate, the angle adjustment mechanism being arranged on the substrate; and a fixing mechanism for supporting the support plate after the working angle is adjusted, the fixing mechanism being provided with multiple groups at equal intervals in the circumferential direction of the substrate.

[0006] As a further scheme of the present application, the angle adjustment mechanism comprises: a vertical block, two groups of vertical blocks being symmetrically arranged on the substrate, and a second rotating shaft being rotatably arranged between the two groups of vertical blocks; A second adjusting motor is arranged on the substrate, and an output shaft of the second adjusting motor is fixedly connected with the second rotating shaft; A pitching frame is arranged, and both ends of the pitching frame are rotatably connected with the second rotating shaft through rotating rings, and one of the rotating rings is further fixedly provided with a driving frame; A first adjusting motor is arranged, and an output shaft of the first adjusting motor is fixedly connected with the driving frame; A first rotating shaft is rotatably arranged on the pitching frame, and a swing frame for supporting the support plate is fixedly arranged on the first rotating shaft, and a plurality of fixing holes are arranged on the swing frame; and a driving member for driving the first rotating shaft to rotate.

[0007] As a further scheme of the present application, the driving member comprises a worm wheel fixedly arranged on the first rotating shaft, and a worm is fixedly arranged on the second rotating shaft and engaged with the worm wheel.

[0008] As a further scheme of the present application, the fixing mechanism comprises: An adjusting cylinder is arranged in the base, and a stabilizing plate is arranged in the base for fixing the adjusting cylinder, and both ends of the adjusting cylinder are in a closed structure; A support rod is arranged, and a through hole is arranged on the top of the adjusting cylinder for slidably arranging the support rod, and a support seat is arranged on the top of the support rod; A roller is rotatably arranged in the support seat, and the roller is in contact with the bottom surface of the support plate, and a spring is further arranged on the support rod for elastically supporting the support seat; A fixing disc is slidably arranged in the adjusting cylinder, and the fixing disc is fixedly connected with the bottom of the support rod, and a plurality of flow guide holes are arranged on the fixing disc; An electrode plate is arranged on the inner top and the inner bottom of the adjusting cylinder; the through hole is arranged on the electrode plate on the top for the support rod to pass through; and an electro-rheological fluid is filled in the adjusting cylinder, and the electro-rheological fluid is between the two electrode plates.

[0009] As a further scheme of the present application, a guide rod is arranged in the adjusting cylinder, and a circular hole is arranged in the support rod for slidably connecting with the guide rod.

[0010] As a further scheme of the present application, an auxiliary cover is arranged at both ends of each group of flow guide holes, the auxiliary cover is in a horn structure, and the small opening side of the auxiliary cover faces the flow guide hole.

[0011] As a further scheme of the present application, the electro-rheological fluid comprises: A dispersed phase, a continuous phase and an additive, wherein the dispersed phase is 20-50 parts by mass, the continuous phase is 50-80 parts by mass, and the additive is 0.1-5 parts by mass; The dispersed phase is dielectric particles, the continuous phase is a liquid medium with high insulation, low viscosity, chemical inertness and wide temperature adaptability, and the additives include at least one of dispersion stabilizers, viscosity regulators, antioxidants and preservatives.

[0012] As a further aspect of the application: the dispersed phase is at least one of inorganic dielectric particles, organic-inorganic composite particles or electrically conductive modified particles.

[0013] As a further aspect of the application: the continuous phase is at least one of mineral oil, synthetic oil or insulating organic solvent.

[0014] As a further aspect of the application: the preparation method of the electrorheological fluid comprises the following steps: Step one: weigh the dispersed phase, the continuous phase and the additives; Step two: add the dispersed phase to part of the continuous phase, and preliminarily stir and mix to obtain a premix; wherein the stirring speed is 300-400 r / min, and the stirring time is 0.5 h; Step three: add the dispersion stabilizer to the premix, and stir at a temperature of 30-50 DEG C and a speed of 500-800 r / min for 1-2 h to uniformly disperse the dispersed phase; Step four: add the remaining continuous phase, viscosity regulator, antioxidant and preservative, and continue to stir at a temperature of 30-50 DEG C and a speed of 300-500 r / min for 0.5-1 h to obtain the electrorheological fluid.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: different satellite communication antennas can be fixed to the mounting table for testing, the working angle of the supporting plate can be adjusted by using the angle adjusting mechanism, and the mounting table can be adjusted synchronously with the supporting plate by cooperating with the rotating motor, so that the test angle of the satellite communication antenna can be adjusted, the rotating motor can drive the mounting table to rotate, and the test angle of the satellite communication antenna can be further adjusted, the adjustment range is effectively expanded, different test requirements can be met, the supporting plate can be stably supported after angle adjustment by using the fixing mechanism, the satellite communication antenna is effectively prevented from changing angle during testing, and the test precision is improved. The present application avoids the problems of the existing satellite communication antenna test rotating platform, that is, manual adjustment is mostly required when the angle is adjusted, there is no fixing structure, the angle cannot be further fixed after adjustment, the platform is easily shaken in strong convection and other bad weather, the angle is easily deviated, and the test precision is affected. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0017] Figure 1 It is a structural schematic diagram of the base of the present application.

[0018] Figure 2 It is a structural schematic diagram of the internal structure of the base in the present application.

[0019] Figure 3 It is a structural schematic diagram of the base of the present application. Figure 3

[0020] Figure 4 It is a structural schematic diagram of the angle adjusting mechanism in the present application.

[0021] Figure 5 It is a structural schematic diagram of the base of the present application. Figure 4

[0022] Figure 6 It is a structural schematic diagram of the base of the present application. Figure 5

[0023] Figure 7 It is a structural schematic diagram of the swing frame and the tilt frame in the present application.

[0024] Figure 8 It is a sectional structural schematic diagram of the fixing mechanism in the present application.

[0025] Figure 9 It is a structural schematic diagram of the support rod in the present application.

[0026] Figure 10 It is a structural schematic diagram of the fixing disc in the present application.

[0027] Figure 11 It is a structural schematic diagram of the auxiliary cover in the present application.

[0028] In the drawings: 1-base, 2-base plate, 3-support plate, 4-mounting table, 5-support rod, 6-adjusting cylinder, 7-stabilizing plate, 8-stand block, 9-swing frame, 10-tilt frame, 11-roller, 12-rotary motor, 13-worm wheel, 14-rotation shaft one, 15-adjusting motor one, 16-worm, 17-rotation shaft two, 18-adjusting motor two, 19-rotation ring, 20-driving frame, 21-support seat, 22-spring, 23-electrode plate, 24-fixing disc, 25-guiding rod, 26-flow guiding hole, 27-auxiliary cover, 28-electrorheological fluid. DETAILED DESCRIPTION​​​

[0029] The technical solutions of the present application will be described clearly and completely in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application should be understood according to the specific circumstances.

[0032] The present application will be further explained in conjunction with the specific embodiments.

[0033] Embodiment 1: Please refer to Figures 1-11 The satellite communication antenna test rotating platform provided by the embodiment of the present application comprises: a base 1, a substrate 2 and a mounting table 4 for placing a satellite communication antenna to be tested, the substrate 2 is arranged on the base 1; a support plate 3, the support plate 3 is provided with a rotating motor 12 for driving the mounting table 4 to rotate; an angle adjusting mechanism for controlling the working angle of the support plate 3, the angle adjusting mechanism is arranged on the substrate 2; and a fixing mechanism for supporting the support plate 3 after the working angle is adjusted, the fixing mechanism is arranged with multiple groups at equal intervals in the circumferential direction of the substrate 2.

[0034] In the embodiment of the present application, a plurality of fixing hole positions are formed on the mounting table 4, different satellite communication antennas can be fixed on the mounting table 4 for testing, the working angle of the support plate 3 can be adjusted by using the angle adjusting mechanism, and the mounting table 4 can be adjusted synchronously with the support plate 3 by cooperating with the rotating motor 12, so as to realize the adjustment of the test angle of the satellite communication antenna, the mounting table 4 can be rotated by using the rotating motor 12, further realizing the adjustment of the test angle of the satellite communication antenna, effectively expanding the adjustment range, and being able to meet different test requirements, the support plate 3 can be stably supported after the angle adjustment by using the fixing mechanism, effectively preventing the satellite communication antenna from changing the angle during the test process, and further improving the test precision; compared with the prior art, by cooperating the support plate 3, the angle adjusting mechanism and the fixing mechanism, the present application avoids the problem that the existing satellite communication antenna test rotating platform mostly needs manual adjustment when adjusting the angle, lacks a fixing structure, cannot be further fixed after the angle adjustment is completed, is easily shaken in strong convection and other bad weather, causes the angle to deviate, and affects the test precision.

[0035] In one embodiment of the present application, please refer to Figures 1-11 The angle adjusting mechanism comprises: The vertical block 8 is symmetrically provided with two groups on the base plate 2, and the rotating shaft two 17 is rotatably installed between the two groups of vertical blocks 8; The adjusting motor two 18 is arranged on the base plate 2, and the output shaft of the adjusting motor two 18 is fixedly connected with the rotating shaft two 17; The pitch frame 10 is rotatably connected between the two ends of the pitch frame 10 and the rotating shaft two 17 through the rotating ring 19, and one of the rotating rings 19 is further fixedly installed with the driving frame 20; The adjusting motor one 15 is fixedly connected with the driving frame 20 through the output shaft; The rotating shaft one 14 is rotatably installed on the pitch frame 10, the swing frame 9 for supporting the support plate 3 is fixedly installed on the rotating shaft one 14, and a plurality of fixing holes are formed in the swing frame 9; so that the swing frame 9 and the support plate 3 can be fixed by screws; And the driving part for driving the rotating shaft one 14 to rotate; The driving part comprises a worm wheel 13 fixedly installed on the rotating shaft one 14, and a worm 16 fixedly installed on the rotating shaft two 17 and engaged with the worm wheel 13.

[0036] In the embodiment, the adjusting motor two 18 drives the rotating shaft two 17 to rotate, drives the worm 16 to rotate, drives the worm gear 13 to rotate, drives the rotating shaft one 14 to rotate, drives the swing frame 9 to rotate around the rotating shaft one 14, the adjusting motor one 15 drives the rotating ring 19 to rotate around the rotating shaft two 17, drives the pitching frame 10 to rotate around the rotating shaft two 17, and drives the support plate 3 to swing left and right around the rotating shaft two 17 in cooperation with the swing frame 9, thereby realizing angle adjustment.

[0037] In one embodiment of the present application, referring to Figures 1-11 , the fixing mechanism comprises: The adjusting cylinder 6 is provided with a stabilizing plate 7 in the base 1 for fixing the adjusting cylinder 6, and both ends of the adjusting cylinder 6 are closed structures; The support rod 5 is provided with a through hole for slidingly installing the support rod 5 on the top of the adjusting cylinder 6, and the top of the support rod 5 is provided with a support seat 21; The roller 11 is rollingly installed in the support seat 21, the roller 11 is in contact with the bottom surface of the support plate 3, and the support rod 5 is further provided with a spring 22 for elastically supporting the support seat 21; The fixing disc 24 is slidingly installed in the adjusting cylinder 6, the fixing disc 24 is fixedly connected with the bottom of the support rod 5, and a plurality of flow guide holes 26 are formed in the fixing disc 24; The electrode plate 23 is provided with one on the inner top and the inner bottom of the adjusting cylinder 6; the through hole for the support rod 5 to pass through is formed in the electrode plate 23 on the top; The electro-rheological fluid 28 is filled in the adjusting cylinder 6, and the electro-rheological fluid 28 is between the two electrode plates 23; The guide rod 25 is installed in the adjusting cylinder 6, the circular hole for slidingly connecting with the guide rod 25 is formed in the support rod 5; the stability of the support rod 5 during movement can be improved by using the guide rod 25, and the through hole for the guide rod 25 to pass through is formed in the electrode plate 23 on the bottom; The auxiliary cover 27 is provided with a horn-shaped structure at both ends of each group of flow guide holes 26, and the small opening side of the auxiliary cover 27 faces the flow guide hole 26; the auxiliary cover 27 provided at both ends of each group of flow guide holes 26 forms a funnel-shaped structure, when the electro-rheological fluid 28 changes from liquid to solid-like state, the flow of the electro-rheological fluid 28 is further hindered at the moment of changing to solid-like state due to the narrow middle part of the funnel-shaped structure, the fixing effect of the fixing disc 24 can be improved, the upward and downward deviation of the fixing disc 24 is prevented, and the support effect is improved.

[0038] In the embodiment, the spring 22 is used to support the support seat 21, so that the roller 11 is always pressed on the bottom surface of the support plate 3 during the angle adjustment of the support plate 3, and the electrode plate 23 is not electrified during the angle adjustment of the support plate 3, the fixed disc 24 moves in the adjusting cylinder 6 by following the support rod 5, the current variable fluid 28 can flow above and below the fixed disc 24 through the flow guide hole 26, after the angle adjustment of the support plate 3 is completed, the electrode plate 23 is electrified to generate an electric field, and the current variable fluid 28 is switched from a liquid state to a solid-like state (or different viscoelastic states) under the action of the electric field (and is reversible), so as to fix the fixed disc 24 in the adjusting cylinder 6, at this time, the support rod 5 and the adjusting cylinder 6 are in a relatively static state, thereby realizing the stable support of the support plate 3, and through the arrangement of a plurality of fixing mechanisms, the support of the support plate 3 at any angle that can be adjusted can be realized, and the angle deviation of the support plate 3 is prevented.

[0039] In embodiment 2, on the basis of embodiment 1, the electrorheological fluid 28 comprises a dispersed phase, a continuous phase and an additive, and the mass fraction of the dispersed phase is 20-50 parts, the mass fraction of the continuous phase is 50-80 parts, and the mass fraction of the additive is 0.1-5 parts; the dispersed phase is a dielectric particle, the continuous phase is a liquid medium with high insulation, low viscosity, chemical inertness and wide temperature adaptability, and the additive comprises at least one of a dispersion stabilizer, a viscosity regulator, an antioxidant and a preservative; the dispersion stabilizer is a surfactant, the surfactant is a silane coupling agent or a fatty acid salt, the silane coupling agent is KH-550, and the fatty acid salt is zinc stearate; the viscosity regulator is a high-viscosity polymer or a low-viscosity diluent, the high-viscosity polymer is polyisobutylene, the antioxidant is a phenolic antioxidant, the phenolic antioxidant is 2,6-di-tert-butyl-p-cresol, and the preservative is benzotriazole; The dispersed phase is at least one of inorganic dielectric particles, organic-inorganic composite particles or electrically conductive modified particles; the inorganic dielectric particles are at least one of silicon dioxide, titanium dioxide, aluminum oxide, barium titanate or lead zirconium titanate; the organic-inorganic composite particles are core-shell structure particles with an organic polymer as a core and inorganic dielectric particles as a shell, the organic polymer is polystyrene or polymethyl methacrylate; and the electrically conductive modified particles are dielectric particles coated with an electrically conductive layer, and the material of the electrically conductive layer is a carbon nanotube, graphene or a metal nanomembrane; The continuous phase is at least one of mineral oil, synthetic oil or insulating organic solvent; the synthetic oil is silicone oil or ester oil, the silicone oil is polydimethylsiloxane, and the ester oil is dioctyl adipate; and the insulating organic solvent is transformer oil or paraffin oil; The preparation method of the electrorheological fluid 28 comprises the following steps: Step one: weigh the dispersed phase, the continuous phase and the additive; Step two: add the dispersed phase to part of the continuous phase, and mix preliminarily to obtain a premix; the stirring speed is 300-400 r / min, and the stirring time is 0.5 h; Step three: add a dispersion stabilizer to the premix, and stir at a speed of 500-800 r / min at a temperature of 30-50℃ for 1-2 h to uniformly disperse the dispersed phase; Step four: add the remaining continuous phase, a viscosity regulator, an antioxidant, and a preservative, and continue to stir at a speed of 300-500 r / min at a temperature of 30-50℃ for 0.5-1 h to obtain the electrorheological fluid 28.

[0040] In this embodiment, the dispersed phase, as the "trigger core" of the electrorheological effect, is a dielectric particle, which is randomly dispersed in the base fluid in the absence of an electric field and is polarized to form a "particle chain / cylindrical structure" under the action of an electric field, so that the fluid changes from a liquid state to a quasi-solid state. The types are various, such as inorganic dielectric particles such as silicon dioxide, titanium dioxide, and aluminum oxide, which have high dielectric constant and good chemical stability; improved inorganic particles such as barium titanate and lead zirconate titanate, which enhance the polarization ability by increasing the dielectric constant or introducing ferroelectric properties; organic-inorganic composite particles adopt core-shell structure, balancing the polarization ability and dispersion stability; and conductive modified particles are coated with a conductive layer, which can form a stable chain structure at a lower electric field, significantly improving the electrorheological effect.

[0041] The continuous phase, as the "dispersion carrier" of the particles, needs to have high insulation, low viscosity, chemical inertness, and wide temperature adaptability. Mineral oil has low cost and good insulation but poor temperature adaptability; synthetic oil such as silicone oil and ester oil has wide temperature application range, low volatility, and good chemical stability, and is the first choice for high-performance electrorheological fluid 28; and an insulating organic solvent is suitable for specific low-temperature or low-pressure scenarios.

[0042] Additives, as "auxiliary regulators" for optimizing performance, can solve the problems of particle sedimentation and agglomeration, and adjust the fluid viscosity, prevent oxidation, and prevent corrosion. The dispersion stabilizer is an amphiphilic molecule that can reduce the interfacial tension between the particles and the base fluid, such as silane coupling agent KH-550, which can form a "protective film" on the surface of the particles, and fatty acid salt, which can prevent particle agglomeration through electrostatic repulsion or steric hindrance effect; the viscosity regulator can adjust the initial viscosity of the base fluid according to application requirements; the antioxidant such as 2,6-di-tert-butyl-p-cresol and the preservative such as benzotriazole can prolong the service life of the electrorheological fluid 28.

[0043] The above technical solutions are demonstrated through the following examples: Example 2-1: The electrorheological fluid 28, by mass fraction, the dispersed phase is 20 parts (silicon dioxide), the continuous phase is 80 parts (mineral oil), and the additive is 0.1 part (zinc stearate 0.05 parts, 2,6-di-tert-butyl-p-cresol 0.05 parts).

[0044] The preparation method comprises the following steps: Step one: Take the silicon dioxide, mineral oil, zinc stearate and 2,6-di-tert-butyl-p-cresol by the above mass fraction.

[0045] Step two: Add the silicon dioxide into 40 parts of the mineral oil, and preliminarily stir and mix at a speed of 300 r / min for 0.5 h to obtain a premix.

[0046] Step three: Add the zinc stearate into the premix, and stir at a speed of 500 r / min at a temperature of 30°C for 1 h.

[0047] Step four: Add the remaining 40 parts of the mineral oil and 2,6-di-tert-butyl-p-cresol, and continue to stir at a speed of 300 r / min at a temperature of 30°C for 0.5 h to obtain the electrorheological fluid 28.

[0048] Example 2-2: The electrorheological fluid 28, by mass fraction, the dispersed phase is 50 parts (a mixture of barium titanate and lead zirconium titanate in a mass ratio of 1:1), the continuous phase is 50 parts (polydimethylsiloxane), and the additive is 5 parts (KH-550 2 parts, polyisobutylene 1 part, 2,6-di-tert-butyl-p-cresol 1 part, benzotriazole 1 part).

[0049] The preparation method comprises the following steps: Step one: Take the barium titanate, lead zirconium titanate, polydimethylsiloxane, KH-550, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole by the above mass fraction.

[0050] Step two: Add the mixture of barium titanate and lead zirconium titanate into 25 parts of the polydimethylsiloxane, and preliminarily stir and mix at a speed of 400 r / min for 0.5 h to obtain a premix.

[0051] Step three: Add the KH-550 into the premix, and stir at a speed of 800 r / min at a temperature of 50°C for 2 h.

[0052] Step four: Add the remaining 25 parts of the polydimethylsiloxane, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole, and continue to stir at a speed of 500 r / min at a temperature of 50°C for 1 h to obtain the electrorheological fluid 28.

[0053] Example 2-3: The electrorheological fluid 28, by mass fraction, the dispersed phase is 35 parts (a mixture of core-shell structure particles with polystyrene as the core and titanium dioxide as the shell and titanium dioxide particles coated with carbon nanotubes in a mass ratio of 2:1), the continuous phase is 63 parts (dioctyl adipate), and the additive is 2 parts (zinc stearate 0.8 parts, polyisobutylene 0.4 parts, 2,6-di-tert-butyl-p-cresol 0.4 parts, benzotriazole 0.4 parts).

[0054] The preparation method comprises the following steps: Step one: take the core-shell structure particles, titanium dioxide particles coated with carbon nanotubes, dioctyl adipate, zinc stearate, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole according to the above mass fraction.

[0055] Step two: add the mixture of core-shell structure particles and titanium dioxide particles coated with carbon nanotubes to 31.5 parts of dioctyl adipate, and preliminarily stir and mix at a speed of 350 r / min for 0.5 h to obtain a premix.

[0056] Step three: add zinc stearate to the premix, and stir at a speed of 650 r / min at a temperature of 40°C for 1.5 h.

[0057] Step four: add the remaining 31.5 parts of dioctyl adipate, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole, and continue to stir at a speed of 400 r / min at a temperature of 40°C for 0.7 h to obtain the electrorheological fluid 28.

[0058] Example 2-4: The electrorheological fluid 28, by mass fraction, the dispersed phase is 30 parts (a mixture of barium titanate and core-shell structure particles with polystyrene as the core and titanium dioxide as the shell in a mass ratio of 1:1), the continuous phase is 67 parts (polydimethylsiloxane), and the additive is 3 parts (KH-550 1.2 parts, polyisobutylene 0.6 parts, 2,6-di-tert-butyl-p-cresol 0.6 parts, benzotriazole 0.6 parts).

[0059] The preparation method comprises the following steps: Step one: take the barium titanate, core-shell structure particles, polydimethylsiloxane, KH-550, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole according to the above mass fraction.

[0060] Step two: add the mixture of barium titanate and core-shell structure particles to 33.5 parts of polydimethylsiloxane, and preliminarily stir and mix at a speed of 380 r / min for 0.5 h to obtain a premix.

[0061] Step three: add KH-550 into the premix, stir at 45℃ and 700r / min for 1.8h.

[0062] Step four: add the rest of 33.5 parts of polydimethylsiloxane, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole, continue to stir at 45℃ and 450r / min for 0.9h to obtain the electrorheological fluid 28.

[0063] Example 2-5: the electrorheological fluid 28, the dispersed phase is 40 parts (graphene-coated alumina particles) and the continuous phase is 58 parts (a mixture of transformer oil and paraffin oil in a mass ratio of 3:2), and the additive is 2 parts (zinc stearate 0.8 parts, polyisobutylene 0.4 parts, 2,6-di-tert-butyl-p-cresol 0.4 parts, and benzotriazole 0.4 parts).

[0064] The preparation method comprises the following steps: Step one: take graphene-coated alumina particles, transformer oil, paraffin oil, zinc stearate, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole according to the above mass parts.

[0065] Step two: add graphene-coated alumina particles into the mixture of 29 parts of transformer oil and paraffin oil, and preliminarily stir and mix at 320r / min for 0.5h to obtain a premix.

[0066] Step three: add zinc stearate into the premix, stir at 38℃ and 600r / min for 1.2h.

[0067] Step four: add the rest of 29 parts of the mixture of transformer oil and paraffin oil, polyisobutylene, 2,6-di-tert-butyl-p-cresol and benzotriazole, continue to stir at 38℃ and 380r / min for 0.6h to obtain the electrorheological fluid 28.

[0068] The electrorheological fluid 28 prepared in the above examples is subjected to performance test, and the test results are shown in the following table: Table 1 Performance test results of the electrorheological fluid prepared in the examples Example Electrorheological effect (yield stress / Pa) Temperature range / °C Stability (settling time / d) 2-1 50 -30-120 30 2-2 300 -60-200 90 2-3 220 -50-180 75 2-4 280 -60-200 85 2-5 180 -40-160 60 From the above test results, it can be seen that the electrorheological fluid 28 prepared by the present application has good electrorheological effect, wide temperature application range and high stability, and the performance of examples 2-2 and 2-4 is particularly outstanding, which can better meet the needs of the use of the present application.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A satellite communication antenna test rotating platform, comprising a base, a base plate and a mounting table for placing a satellite communication antenna to be tested, the base plate is arranged on the base, characterized in that, Also include: Support plate, the support plate is provided with a rotating motor for driving the installation platform to rotate; Angle adjusting mechanism for controlling the working angle of the support plate, the angle adjusting mechanism is arranged on the base plate; And a fixing mechanism for supporting the support plate after the working angle is adjusted, the fixing mechanism is arranged equidistantly in the circumferential direction of the base plate.

2. The satellite communication antenna test turntable platform of claim 1, wherein, The angle adjusting mechanism comprises: Stand, two groups of stands are symmetrically arranged on the base plate, and a rotating shaft two is rotatably arranged between the two groups of stands; Adjusting motor two arranged on the base plate, the output shaft of the adjusting motor two is fixedly connected with the rotating shaft two; Pitching frame, both ends of the pitching frame are rotatably connected with the rotating shaft two through a rotating ring, and one of the rotating rings is further fixedly connected with a driving frame; Adjusting motor one, the output shaft of the adjusting motor one is fixedly connected with the driving frame; Rotating shaft one rotatably arranged on the pitching frame, the rotating shaft one is fixedly connected with a swing frame for supporting the support plate, and a plurality of fixing holes are formed in the swing frame; And a driving member for driving the rotating shaft one to rotate.

3. The satellite communication antenna test turntable platform of claim 2, wherein, The driving member comprises a worm wheel fixedly connected with the rotating shaft one, and a worm fixedly connected with the worm wheel on the rotating shaft two.

4. The satellite communication antenna test turntable platform of claim 1, wherein, The fixing mechanism comprises: Adjusting cylinder, a stabilizing plate is arranged in the base for fixing the adjusting cylinder, and both ends of the adjusting cylinder are in closed structure; Supporting rod, a through hole is formed in the top of the adjusting cylinder for slidingly mounting the supporting rod, and a supporting seat is arranged on the top of the supporting rod; Roller rotatably arranged in the supporting seat, the roller is in contact with the bottom surface of the support plate, and a spring is further arranged on the supporting rod for elastically supporting the supporting seat; Fixed disc slidingly arranged in the adjusting cylinder, the fixed disc is fixedly connected with the bottom of the supporting rod, and a plurality of flow guide holes are formed in the fixed disc; Electrode plate, one electrode plate is arranged on the inner top and the inner bottom of the adjusting cylinder; a through hole is formed in the top electrode plate for the supporting rod to pass through; And electrorheological fluid, the electrorheological fluid is filled in the adjusting cylinder, and the electrorheological fluid is between the two electrode plates.

5. The satellite communication antenna test turntable platform of claim 4, wherein, A guide rod is arranged in the adjusting cylinder, and a circular hole is formed in the supporting rod for slidingly connecting with the guide rod.

6. The satellite communication antenna test turntable platform of claim 4, wherein, Auxiliary covers are arranged at both ends of each group of flow guide holes, the auxiliary covers are in horn structure, and the small opening side of the auxiliary cover faces the flow guide hole.

7. The satellite communication antenna test turntable platform of claim 4, wherein, The electrorheological fluid comprises: Dispersed phase, continuous phase and additive, the dispersed phase is 20-50 parts, the continuous phase is 50-80 parts, and the additive is 0.1-5 parts; The dispersed phase is dielectric particles, the continuous phase is a liquid medium with high insulation, low viscosity, chemical inertness and wide temperature adaptability, and the additive comprises at least one of a dispersion stabilizer, a viscosity regulator, an antioxidant and a preservative.

8. The satellite communication antenna test turntable platform of claim 7, wherein, The dispersed phase is at least one of inorganic dielectric particles, organic-inorganic composite particles or conductive modified particles.

9. The satellite communication antenna test turntable platform of claim 7, wherein, The continuous phase is at least one of mineral oil, synthetic oil or insulating organic solvent.

10. The satellite communication antenna test turntable platform of claim 7, wherein, The preparation method of the electrorheological fluid comprises the following steps: Step one: weigh the dispersed phase, the continuous phase and the additive according to the amount; Step two: add the dispersed phase into part of the continuous phase, and mix preliminarily by stirring to obtain a premix; wherein the stirring speed is 300-400 r / min, and the stirring time is 0.5 h; Step three: add a dispersion stabilizer into the premix, and stir at a temperature of 30-50 ℃ and a speed of 500-800 r / min for 1-2 h to make the dispersed phase uniformly dispersed; Step four: add the remaining continuous phase, a viscosity regulator, an antioxidant, and a preservative, and continue to stir at a temperature of 30-50 ℃ and a speed of 300-500 r / min for 0.5-1 h to obtain the electrorheological fluid.

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