Heavy-duty two-dimensional swivel with active RCS testing

Abstract

The present application belongs to the technical field of low-scattering electromagnetic testing, and solves the problems of load bearing, attitude adjustment, power supply, control, cooling and other functional requirements of active targets, and discloses a heavy-load two-dimensional rotating top with active RCS testing, comprising a rotating top cylinder, an elevation assembly and an azimuth assembly in the rotating top cylinder, and an axially-through central passage formed inside, the elevation assembly and the azimuth assembly being arranged on both sides or the periphery of the central passage; the elevation assembly is connected with a lower connecting seat, the connecting seat passage is in communication with the central passage of the rotating top cylinder, the azimuth assembly drives the rotating top shell to rotate, and the top end of the rotating top cylinder is provided with an interface assembly. The present application adopts multi-stage speed reduction and screw transmission technology, has high load bearing capacity and high-precision motion characteristics, and realizes the integration of power supply, liquid supply, signal transmission and other functions through the design of hollow structure and interface plate.

Description

Technical Field

[0001] This invention belongs to the field of low-scattering electromagnetic testing technology, specifically relating to a heavy-duty two-dimensional rotating top with active RCS testing. Background Technology

[0002] Currently, in order to carry out azimuth and pitch testing, low-scattering metal supports need to have high load-bearing capacity, low reflection, and efficient attitude adjustment capabilities, while also meeting the power supply, control, and cooling requirements of active targets.

[0003] Patent CN118731512, "A Heavy-Duty Three-Dimensional Rotating Device for Measuring Active Targets," proposes a heavy-duty three-dimensional rotating device for measuring active targets. This rotating device can achieve pitch, azimuth, and translation functions, but it does not address the wiring and scattering suppression issues of the rotating device, and the interface board is not designed to meet the cooling liquid supply requirements of active devices. Additionally, patent CN204613392U, "A Rotating Device for RCS Measurement in an Anechoic Chamber," proposes a rotating device for RCS measurement in an anechoic chamber, improving the positioning accuracy and driving capability of the rotating device, and enhancing measurement accuracy, but it does not address the measurement requirements for the pitch, azimuth, and active devices of the target object.

[0004] Existing testing equipment suffers from the following problems: the traditional two-dimensional rotating top structure design struggles to simultaneously meet the demands of high load-bearing capacity and high-precision motion, especially prone to jitter and off-center loading issues under complex working conditions; while performing attitude adjustment, existing devices struggle to integrate power supply, liquid supply, and signal transmission functions, resulting in high system complexity and redundancy. In active target testing, the numerous test cables are prone to pulling and tangling during movement, affecting test stability and reliability; the complex structure of the two-dimensional rotating top may lead to additional scattered signals in RCS testing, impacting the accuracy of test results. Summary of the Invention

[0005] The present invention aims to provide a heavy-duty two-dimensional rotating top design for RCS testing, which solves the problems in the prior art by optimizing the mechanical structure, functional design and low scattering performance of the support.

[0006] This invention is achieved through the following scheme: A heavy-duty two-dimensional rotary top with active RCS testing includes a rotary top cylinder with an axially penetrating central channel inside for laying cables and conduits. The rotary top cylinder contains a pitch component and an azimuth component, and an interface component is located at the top of the rotary top cylinder. The pitch component is fixed to a chassis via a base, and the chassis has a cable channel through which cables are introduced into the central channel and connected to the interface component. The pitch component is connected to a lower connecting seat, and the connecting seat channel communicates with the central channel of the rotary top cylinder. The azimuth component drives the rotary top shell to rotate, and the pitch and azimuth components are arranged on both sides or circumferentially around the central channel.

[0007] Furthermore, the pitch assembly includes a pitch axis drive motor, a pitch axis multi-stage reduction mechanism, and a pitch axis feedback device; the pitch axis drive motor drives the pitch axis multi-stage reduction mechanism, which is arranged on both sides of the central channel and connected to the base and the lower connecting seat; the pitch axis feedback device is set on the chassis.

[0008] Furthermore, the pitch axis multi-stage reduction mechanism includes a pitch axis primary reducer, a pitch axis secondary reduction gear, and a pitch axis tertiary reduction screw connected in sequence; the pitch axis tertiary reduction screw is located below the pitch axis drive motor and symmetrically arranged on both sides of the central channel, and the drive base and connecting seat realize pitch angle adjustment.

[0009] Furthermore, the azimuth component includes an azimuth axis drive motor, an azimuth axis multi-stage reduction mechanism, and an azimuth axis feedback device. The azimuth axis drive motor drives the azimuth axis multi-stage reduction mechanism; the azimuth axis multi-stage reduction mechanism is connected to the azimuth adjustment component, the azimuth axis support bearing rotatably supports the azimuth adjustment component, the azimuth adjustment component is fixed to the rotating top shell and drives the rotating top shell to rotate; the azimuth axis feedback device is used to detect the rotation angle of the azimuth adjustment component.

[0010] Furthermore, the azimuth axis multi-stage reduction mechanism includes a first-stage azimuth axis reducer, a second-stage azimuth axis reducer, and a third-stage azimuth axis reduction gear connected in sequence; the azimuth adjustment component includes an internal gear ring, which is located on the upper part of the azimuth assembly, and the third-stage azimuth axis reduction gear and the detection end gear of the azimuth axis feedback device mesh with the internal gear ring.

[0011] Furthermore, a radial support bearing for the azimuth axis is provided at the lower end of the rotating housing.

[0012] Furthermore, the interface assembly includes a fixed interface board with a recessed central area, where the liquid cooling pipe interface is located.

[0013] Furthermore, the interface board is also equipped with an RF cable interface, a fiber optic connector interface, a network cable interface, a DC power supply interface, and a ground connection point.

[0014] Furthermore, it also includes a cable chain, one end of which is fixed to the interface assembly. The cable passes through the interface assembly and is inserted into the cable chain to connect to the device under test. The bottom of the interface assembly is connected to the rotating housing via a bracket bearing. When the device under test rotates, the cable chain moves with the device under test, thus preventing the internal cable from being pulled.

[0015] Furthermore, an upwardly extending tube frame is provided on the outer periphery of the interface component, and one end of the cable chain is fixed to the tube frame.

[0016] Furthermore, a contour baffle is provided at the bottom of the rotating cylinder. The shape of the contour baffle matches the outline of the bottom opening and is used to close the bottom opening of the central channel to suppress scattering during RCS testing.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The two-dimensional rotating top of this invention adopts multi-stage deceleration and helical transmission technology, which has high load-bearing capacity and high-precision motion characteristics. Through the hollow structure and interface plate design, it realizes the integration of power supply, liquid supply and signal transmission functions, simplifying system design. The contoured high-gloss planar baffle design realizes the scattering suppression of RCS test by the two-dimensional rotating top, improving the test accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall layout structure of the two-dimensional rotating top of the present invention; Figure 2 This is a detailed schematic diagram of the pitch component of the two-dimensional rotating top of the present invention; Figure 3 This is a detailed schematic diagram of the orientation component of the two-dimensional rotating top of the present invention; Figure 4 This is a schematic diagram of the interface component for the two-dimensional rotating top of the present invention; Figure 5 This is a schematic diagram of the rotating cylinder and drag chain wiring of the two-dimensional rotating top of the present invention; Figure 6 yes Figure 5 Schematic diagram of the connection between the rotating top shell and the interface board at point A; Figure 7 This is a schematic diagram of the contour baffle structure of the two-dimensional rotating top of the present invention; Figure label: 1-Rotating cylinder; 101-Central channel; 102-Base; 103-Chassis; 104-Wire channel; 105-Cable; 106-Rotating housing; 107-Bearing rotor; 108-Bearing stator; 2-Pitch assembly; 201-Pitch axis drive motor; 202-Pitch axis feedback device; 203-Pitch axis two-stage reduction gear; 204-Pitch axis three-stage reduction screw; 3-Azimuth component; 301-Azimuth axis drive motor; 302-Azimuth axis feedback device; 303-Azimuth axis three-stage reduction gear; 304-Azimuth axis support bearing; 305-Azimuth axis radial support bearing; 306-Internal gear ring; 4-Interface assembly; 401-Interface board; 402-Liquid cooling pipe interface; 5-Connecting seat; 6-Drag chain; 7-Cylinder frame; 8-Baffle. Detailed Implementation

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", 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 invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. The invention will now be clearly and completely described in conjunction with embodiments and accompanying drawings.

[0023] like Figures 1-7 As shown, a heavy-duty two-dimensional rotating top with active RCS testing includes a rotating top cylinder 1, with an axially penetrating central channel 101 formed inside the rotating top cylinder 1 for laying cables 105 and pipes; the rotating top cylinder 1 contains a pitch component 2 and an orientation component 3, and an interface component 4 is provided at the top of the rotating top cylinder 1. The pitch component 2 is fixed to the chassis 103 via the base 102. The chassis 103 is provided with a cable channel 104, through which the cable 105 is introduced into the central channel 101 and connected to the interface component 4. The pitch component 2 is connected to the lower connecting seat 5, and the channel of the connecting seat 5 is connected to the central channel 101 of the rotating cylinder 1. The azimuth component 3 drives the rotating housing 106 to rotate, and its driving device is fixed inside the rotating cylinder 1. The pitch component 2 and the azimuth component 3 are arranged on both sides or around the central channel 101.

[0024] With the above structure, the cable 105 and the conduit are neatly introduced through the cable channel 104 of the chassis 103 and centrally laid out through the central channel 101, avoiding pulling and tangling during rotation. The overall structure can still maintain the stability of the cable 105 layout under heavy load rotation conditions, improving the reliability of the testing process.

[0025] The azimuth component 3 is mainly located in the upper space of the rotating cylinder 1, and the pitch component 2 is mainly located in the lower space of the rotating cylinder 1. The pitch axis drive motor 201 is horizontally positioned, and the azimuth axis drive motor 301 extends vertically into the lower space of the rotating cylinder 1. The pitch component 2 and the azimuth component 3 adopt a layered and staggered layout, which ensures multi-stage reduction transmission while leaving sufficient space for the central channel 101, thus achieving space reuse.

[0026] Among them, such as Figure 1 , Figure 2 As shown, the pitch axis drive structure includes a pitch axis drive motor 201, a pitch axis feedback device 202, a pitch axis primary reducer, a pitch axis secondary reduction gear 203, and a pitch axis tertiary reduction screw 204.

[0027] The pitch axis drive motor 201 is horizontally positioned above the pitch assembly 2, driving the pitch axis primary reducer. The output of the primary reducer is connected to the secondary reduction gear 203 below. The secondary reduction gear 203 drives the tertiary reduction screw 204 to rotate. The tertiary reduction screw 204 is located below the pitch axis drive motor 201 and the primary reducer, and is symmetrically arranged on both sides of the central channel 101. It connects the drive base 102 and the lower connecting seat 5 to achieve pitch angle adjustment. The pitch axis feedback device 202 is mounted on the chassis 103 to provide feedback on the pitch angle. This design effectively utilizes vertical space, resulting in a more compact overall structure while ensuring multi-stage reduction transmission.

[0028] like Figure 1 , Figure 3 As shown, the azimuth component 3 includes an azimuth axis drive motor 301, an azimuth axis feedback device 302, an azimuth axis first-stage reducer, an azimuth axis second-stage reduction gear, an azimuth axis third-stage reduction gear 303, an azimuth axis support bearing 304, and an azimuth axis radial support bearing 305. The top output end of the azimuth axis drive motor 301 is connected to the first-stage azimuth axis reducer; the top output end of the first-stage azimuth axis reducer is connected to the second-stage azimuth axis reducer; the top output end of the second-stage azimuth axis reducer is connected to the third-stage azimuth axis reduction gear 303; an internal gear ring 306 is provided on the upper part of the azimuth assembly 3, which is fixed to the rotating top housing 106 and rotatably supported by the azimuth axis support bearing 304. The third-stage azimuth axis reduction gear 303 meshes with the internal gear ring 306, driving the internal gear ring 306 to rotate, thereby driving the entire rotating top housing 106 to rotate relative to each other; the detection end gear of the azimuth axis feedback device 302 also meshes with the internal gear ring 306 to provide azimuth angle feedback; an azimuth axis radial support bearing 305 is provided at the lower end of the rotating top housing 106.

[0029] Through the above structure, the multi-stage reduction gear cooperates with the internal gear ring 306 and uses a helical transmission to transmit power to the upper layer, driving the internal gear ring 306, which is fixed to the rotating top shell 106, to rotate. This achieves stable output while also leaving sufficient space for the central channel 101. The feedback device can directly monitor the azimuth angle within the same gear ring, improving accuracy. At the same time, the azimuth axis support bearing 304 and the azimuth axis radial support bearing 305 provide support for the internal gear ring 306 and the rotating top shell 106, ensuring high load-bearing capacity and stability under heavy load conditions. This allows the azimuth component 3 to operate continuously from 0 to 360°, with a positioning accuracy of ±0.04°, a repeatability of ±0.01°, and an adjustable operating speed of 0.02° / s to 5° / s.

[0030] like Figure 4 As shown, the interface component 4 includes a fixed interface plate 401, with a recessed central area, where the liquid cooling pipe interface 402 is located. This structure effectively utilizes vertical space, increases the interface's length capacity, and allows for smooth bending. The interface board 401 also includes a four-core RF cable interface, a fiber optic connector interface, a network cable interface, a DC power supply interface, and a ground connection point. The liquid cooling pipe interface 402 includes a liquid cooling pipe outlet and a liquid cooling pipe inlet. Through the above structure, the functions of power supply, liquid supply, and signal transmission are integrated, simplifying system design.

[0031] like Figure 5 , Figure 6 As shown, the interface assembly 4 has an upwardly extending cylindrical frame 7 on its outer periphery. One end of the double-bend cable chain 6 is fixed to the cylindrical frame 7. Each cable and water pipe passes through the interface plate 401 and then enters the cable chain 6. The other end is connected to the device under test. The interface plate 401 is equipped with a rotary bearing, which is rotatably connected to the rotating top housing 106. The rotary bearing includes a bearing rotor 107 and a bearing stator 108. When the device under test rotates, the cable chain 6 moves with the device under test, causing the cable 105 to move, which can prevent the internal cable 105 from being pulled.

[0032] like Figure 7 As shown, a contoured baffle 8 is provided at the bottom of the rotating cylinder 1. The contoured shape matches the outline of the bottom opening and can be an irregular outline. It is used to close the bottom opening of the central channel 101. The surface of the baffle 8 is a high-gloss surface to suppress scattering during RCS testing. This avoids the complex structure of the two-dimensional rotating cylinder forming a cavity that affects the RCS test when the test piece is in a pitched state.

[0033] The two-dimensional rotating top of this invention employs multi-stage deceleration and helical transmission to improve motion accuracy. The pitch component 2 and azimuth component 3 can efficiently adjust the attitude. During operation, the target being tested is mounted on the rotating top cylinder 1, and the rotating top outer shell 106 serves as the mounting shell for the target. All cables 105 and conduits required for testing are introduced from the cable tray 104 of the chassis 103, laid upwards through the central channel 101, and connected to the target via the interface component 4 at the top and the double-bend cable chain 6. By controlling the pitch component 2 and azimuth component 3, two-dimensional motion of azimuth and pitch is achieved. Throughout the entire motion process, the cables 105 and conduits are effectively constrained and protected within the central channel 101, the interface component 4, and the cable chain 6. The contour baffle 8 at the bottom of the device effectively reduces its own scattering.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heavy-load two-dimensional rotating top with active RCS testing, characterized in that, The device includes a rotating top cylinder (1), which forms an axially penetrating central channel (101) inside. The rotating top cylinder (1) contains a pitch component (2) and an azimuth component (3), and an interface component (4) is provided at the top of the rotating top cylinder (1). The pitch component (2) is fixed to a chassis (103) via a base (102), and the chassis (103) is provided with a cable groove (104), through which a cable (105) is introduced into the central channel (101) and connected to the interface component (4). The pitch component (2) is connected to a lower connecting seat (5), and the channel of the connecting seat (5) is connected to the central channel (101) of the rotating top cylinder (1). The azimuth component (3) drives the rotating top shell (106) to rotate. The pitch component (2) and the azimuth component (3) are arranged on both sides or around the central channel (101). The interface component (4) is connected to the rotating top shell (106) via a rotary bearing. Among them, the azimuth component (3) is mainly located in the upper space of the rotating top cylinder (1), the pitch component (2) is mainly located in the lower space of the rotating top cylinder (1), the pitch axis drive motor (201) is set horizontally, and the azimuth axis drive motor (301) extends vertically to the lower space of the rotating top cylinder (1); the pitch component (2) and the azimuth component (3) adopt a layered and staggered layout to ensure multi-stage deceleration transmission and leave sufficient space for the central channel (101), thus achieving space reuse; The pitch axis drive motor (201) is horizontally arranged on the upper part of the pitch assembly (2). The pitch assembly (2) includes a pitch axis primary reducer, a pitch axis secondary reducer (203) and a pitch axis tertiary reducer screw (204) connected in sequence. The pitch axis drive motor (201) drives the pitch axis primary reducer. The output end of the pitch axis primary reducer is connected to the pitch axis secondary reducer (203) below. The pitch axis tertiary reducer screw (204) is located below the pitch axis drive motor (201) and the pitch axis primary reducer, and is symmetrically arranged on both sides of the central channel (101). The drive base (102) and the connecting seat (5) realize the pitch angle adjustment. The azimuth component (3) includes a first-stage azimuth axis reducer, a second-stage azimuth axis reducer, and a third-stage azimuth axis reduction gear (303) connected in sequence; the top output end of the azimuth axis drive motor (301) is connected to the first-stage azimuth axis reducer; the top output end of the first-stage azimuth axis reducer is connected to the second-stage azimuth axis reducer; the top output end of the second-stage azimuth axis reducer is connected to the third-stage azimuth axis reduction gear (303); the multi-stage reduction gear cooperates with the internal gear ring (306) and uses a helical transmission to transmit power to the upper layer, driving the internal gear ring (306) fixed to the rotating top shell (106) to rotate, obtaining stable output while leaving sufficient space for the central channel (101).

2. The heavy-load two-dimensional rotating top with active RCS testing as described in claim 1, characterized in that, The pitch assembly (2) also includes a pitch axis feedback device (202); the pitch axis feedback device (202) is mounted on the chassis (103).

3. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 2, characterized in that, The orientation component (3) also includes an orientation axis feedback device (302), and an orientation axis support bearing (304) rotatably supports the internal gear ring; the orientation axis feedback device (302) is used to detect the rotation angle of the orientation adjustment component.

4. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 3, characterized in that, The three-stage reduction gear (303) of the azimuth axis and the detection end gear of the azimuth axis feedback device (302) mesh together with the internal gear ring (306).

5. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 2, characterized in that, The lower end of the rotating top shell (106) is provided with an azimuth axis radial support bearing (305).

6. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 1, characterized in that, The interface component (4) includes a fixed interface plate (401), the central area of ​​which is recessed, and the liquid cooling pipe interface (402) is arranged in the recessed area.

7. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 6, characterized in that, The interface board (401) is also provided with an RF cable interface, an optical fiber connector interface, a network cable interface, a DC power supply interface, and a ground connection point.

8. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 1, characterized in that, It also includes a cable chain (6), one end of which is fixed to the interface component (4), and the other end is connected to the device under test. The cable (105) passes through the interface component (4) and enters the cable chain (6) to connect to the device under test. When the device under test rotates, the cable chain (6) moves along with the device under test, driving the cable (105) to move.

9. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 8, characterized in that, An upwardly extending tube frame (7) is provided on the outer periphery of the interface assembly (4), and one end of the drag chain (6) is fixed to the tube frame (7).

10. A heavy-load two-dimensional rotating top with active RCS testing as described in claim 1, characterized in that, A contour baffle (8) is provided at the bottom of the rotating cylinder (1). The shape of the contour baffle (8) matches the bottom opening contour and is used to close the bottom opening of the central channel (101).

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