Radar antenna pedestal

Abstract

The invention provides a radar antenna pedestal which comprises a radar antenna body, and two ends of the radar antenna body are respectively connected with a left support arm assembly and a right support arm assembly through two pitching driving mechanisms. The pitching driving mechanism is used for driving the radar antenna body to rotate between the left support arm assembly and the right support arm assembly; the bottom ends of the left support arm assembly and the right support arm assembly are detachably connected with a turntable; the center of the bottom end of the turntable is connected with an azimuth rotating bracket; the bottom end of the azimuth rotating bracket is connected with an azimuth conversion transition plate; an azimuth driving mechanism is arranged at the bottom end of the turntable and is used for driving the turntable to rotate; rotary transformers are arranged on the side part of the azimuth rotating bracket and the side part of the pitching driving mechanism; the rotary transformer is used for measuring an azimuth rotation angle and a pitching rotation angle. According to the invention, a double-motor-driven structural form is adopted, and a precise tracking function is achieved through double-motor clearance elimination; and the azimuth dynamic tracking precision, the pitching dynamic tracking precision and the mechanical pointing precision are high.

Description

Technical Field

[0001] The present invention relates to the technical field of radar antennas, and in particular to a radar antenna base. Background Art

[0002] The two-dimensional turntable of the radar antenna is a device used to control the rotation of the radar antenna in two dimensions. It can rotate 360° horizontally and in a certain range of pitch, so that the radar can cover a wide spatial area, increase the detection distance and range, and promptly detect targets at long distances and different altitudes. It also has good dynamic performance and response speed, and can quickly and smoothly follow the movement of the target, ensuring that the radar can stably track the target when it moves quickly or maneuvers, and output continuous and accurate target information.

[0003] The horizontal rotation and pitch rotation of the existing radar antenna two-dimensional turntable are generally driven by a single motor. This driving method has low precision. During the rotation process, vibration and displacement are easily caused by the rotation of the pitch axis, affecting the overall accuracy. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a radar antenna pedestal to solve the problems mentioned in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A radar antenna pedestal comprises a radar antenna body, wherein two ends of the radar antenna body are respectively connected to a left arm assembly and a right arm assembly through two pitch drive mechanisms; the pitch drive mechanism is used to drive the radar antenna body to rotate between the left arm assembly and the right arm assembly; a turntable is detachably connected to the bottom ends of the left arm assembly and the right arm assembly; an azimuth rotation bracket is connected to the center of the bottom end of the turntable, and an azimuth rotation bracket is connected to an azimuth conversion transition plate at the bottom end; an azimuth drive mechanism is provided at the bottom end of the turntable, and the azimuth drive mechanism is used to drive the turntable to rotate; a rotary transformer is provided on the side of the azimuth rotation bracket and the side of the pitch drive mechanism; the rotary transformer is used to measure the azimuth rotation angle and the pitch rotation angle.

[0007] Furthermore, the pitch drive mechanism includes a motor, a reducer, an eccentric sleeve, a pinion, a pitch axis and a slewing bearing; the pitch axis is connected to the radar antenna body, and a slewing bearing is provided on the outside of the pitch axis; a large gear is provided on the outside of the slewing bearing, and the large gear is engaged with a small gear; the output end of the motor is connected to the reducer, and an eccentric sleeve is provided on the outside of the output end of the reducer; the output end of the reducer is connected to the small gear.

[0008] Furthermore, the pitch drive mechanism also includes an external shaft, a connecting shaft and an outer sleeve; the end of the pitch shaft is connected to the external shaft through the connecting shaft, and an outer sleeve is provided on the outer side of one end of the pitch shaft; the outer side of the external shaft is rotatably connected to the support frame, and the outer side of the connecting shaft is rotatably connected to the limit frame; the other end of the support frame and the limit frame are arranged in the right support arm assembly.

[0009] Furthermore, a protrusion in a "cross"-shaped structure is formed at the end of the circumscribed shaft, and a groove in a "cross"-shaped structure is formed at the end of the connecting shaft; the protrusion is cooperatively connected with the groove.

[0010] Furthermore, the azimuth drive mechanism includes a second motor, a second reducer, a second pinion, a second slewing bearing, a housing and a mounting plate; the second slewing bearing is connected to a turntable, and a second large gear is provided on the outer side of the second slewing bearing; the second large gear meshes with two second small gears, each of the second small gears is connected to a second reducer, and each of the second reducers is connected to the output end of the second motor, a mounting plate is provided on the outer side of the second reducer, and a housing is provided on the outer side of the second large gear, and the housing and the mounting plate are connected by bolts.

[0011] Furthermore, the cross-section of the turntable adopts a "U"-shaped structure, and the corners of the turntable are chamfered; the right support arm assembly and the left support arm assembly are connected to both sides of the top of the turntable by bolts.

[0012] Furthermore, a cylindrical cylinder is formed inside the turntable, and the cylinder is bolted to the azimuth rotating bracket; a grid structure is formed inside the turntable.

[0013] Furthermore, the rotary transformer adopts a dual-channel rotary transformer; rotary transformers are provided at both ends of the pitch axis and the side of the azimuth rotation bracket.

[0014] Furthermore, the rotary transformer connected to the pitch axis of motor 1 is connected to the pitch control box; the rotary transformer arranged on the side of the azimuth rotating bracket of motor 2 is connected to the azimuth control box; the pitch control box is connected to the array optical terminal, and the azimuth control box is connected to the platform optical terminal; the array optical terminal is connected to the platform optical terminal, and the array optical terminal is connected to the array monitoring module.

[0015] Furthermore, the pitch control box and the azimuth control box both include a control module, a safety protection module, a drive module and an angle encoding module; the control module is connected to the safety protection module, the drive module and the angle encoding module; and the angle encoding module is connected to the rotary transformer.

[0016] Compared with the prior art, the beneficial effects of the present invention include:

[0017] The two-dimensional turntable of the present invention is used for automatic aiming of radar antennas, aiming motion control of missile launchers, etc. The two-dimensional turntable is mainly composed of a turntable, a slewing bearing, an azimuth drive mechanism, an azimuth rotary transformer, a base, a pitch drive mechanism, and a pitch rotary transformer. The main function of the two-dimensional turntable is to support the antenna and provide the antenna with mechanical scanning, tracking and orientation functions of azimuth / pitch; at the same time, it provides synchronous azimuth / pitch position information in real time; the structure of the present invention is simple, and it also has the following features:

[0018] It adopts a dual-motor driven structure and achieves precise tracking function through dual-motor backlash elimination; it has high azimuth dynamic tracking accuracy, pitch dynamic tracking accuracy, and mechanical pointing accuracy; it can realize real-time calculation and implementation of the antenna base motion control strategy, and ultimately complete the antenna's precise and stable tracking of the target.

[0019] When the pitch axis rotates, the present invention can drive the external axis and the connecting axis to rotate in the support frame and the limit frame, so as to limit the rotation of the pitch axis, avoid shaking or displacement during rotation, reduce energy loss, improve rotation accuracy, and prolong the service life of the equipment.

[0020] In addition, the present invention also has multifunctionality and wide application scenarios:

[0021] Versatility: The photoelectric theodolite used for the reflective swing mirror can also be applied to the automatic aiming and tracking control of radar antennas, the aiming and motion control of tactical missile launchers, the tracking of military targets, etc. In addition, the two-dimensional turntable is also widely used in experimental research and is often used for precise control experiments in electromechanical laboratories;

[0022] Widely used in scenarios: In aerospace and national defense construction, two-dimensional turntables are used for semi-physical simulation and testing of aircraft to help develop high-performance aircraft. In the military, two-dimensional turntables are used for automatic aiming of radar antennas, aiming motion control of missile launchers, etc. In experimental research, two-dimensional turntables are commonly used experimental equipment that can complete precise control tasks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall planar structure of a radar antenna pedestal of the present invention;

[0025] Figure 2It is a schematic diagram of the partial structure of the pitch drive mechanism of an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the pitch drive mechanism of the embodiment of the present invention from another perspective;

[0027] Figure 4 This is a schematic diagram of the structure of the pitch drive mechanism after removing the limit frame and the support frame from the embodiment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the azimuth driving mechanism of the embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the overall three-dimensional structure of a radar antenna base of the present invention;

[0030] Figure 7 It is a principle block diagram of control in an implementation case of the present invention.

[0031] Explanations in the figure: 1. Right arm assembly; 2. Left arm assembly; 3. Radar antenna body; 4. Pitch drive mechanism; 41. Motor 1; 42. Reducer 1; 43. Eccentric sleeve; 44. Pinion 1; 45. Pitch axis; 46. Slewing bearing 1; 461. Large gear 1; 47. External shaft; 471. Support frame; 48. Connecting shaft; 481. Limiting frame; 49. Outer sheath; 5. Turntable; 6. Azimuth drive mechanism; 61. Motor 2; 62. Reducer 2; 63. Pinion 2; 64. Slewing bearing 2; 641. Large gear 2; 65. Housing; 66. Mounting plate; 7. Azimuth change transition plate; 8. Rotary transformer; 9. Azimuth rotation bracket. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] A radar antenna base, such as Figure 1 and Figure 6 As shown, it includes a radar antenna body 3, and the two ends of the radar antenna body 3 are respectively connected to the left arm assembly 2 and the right arm assembly 1 through two pitch drive mechanisms 4; the pitch drive mechanism 4 is used to drive the radar antenna body 3 to rotate between the left arm assembly 2 and the right arm assembly 1;

[0034] Specifically, Figure 2 , Figure 3 and Figure 4As shown, the pitch drive mechanism 4 includes a motor 41, a reducer 42, an eccentric sleeve 43, a pinion 44, a pitch shaft 45 and a slewing bearing 46; the pitch drive mechanism 4 is provided with two, and the pitch drive mechanism 4 connected to the right arm assembly 1 on the right side is used as an example for explanation. For example, the pitch shaft 45 is connected to the radar antenna body 3, and a slewing bearing 46 is provided on the outside of the pitch shaft 45; a large gear 461 is provided on the outside of the slewing bearing 46, and the large gear 461 meshes with the pinion 44; the output end of the motor 41 is connected to the reducer 42, and an eccentric sleeve 43 is provided on the outside of the output end of the reducer 42; the output end of the reducer 42 is connected to the pinion 44. The motor 41 is installed in the right arm assembly 1, and the pitch shaft 45 is rotatably connected to the right arm assembly 1.

[0035] The pitch drive mechanism 4 of the present invention adopts a transmission form of "servo motor 41 + reducer 42 + small gear 44 + sector gear 461", and a pitch drive mechanism 4 is arranged at the obliquely symmetrical positions at both ends of the pitch, and the precise tracking function is achieved through dual-motor electrical backlash elimination.

[0036] The two pitch drive mechanisms 4 have the same structure, and are composed of a servo motor, a reducer, a pinion and a large gear. Referring to the attached drawings, the specific structure is as follows: the meshing gap between the pinion 1 44 and the sector-shaped large gear 2 461 is adjusted by an eccentric sleeve 43, and the single-side final transmission chain gap is controlled between 0.3-0.5 mm. When driving, the motor 1 41 is first started, and the motor 1 41 drives the pinion 1 44 to rotate when it is started. When the pinion 1 44 rotates, it drives the pitch axis 45 to rotate through meshing with the large gear 1 461, and realizes the pitch angle change of the radar antenna body 3 through the pitch axis 45.

[0037] In order to ensure that the pitch axis 45 can stably rotate in the right arm assembly 1 when the pitch axis 45 rotates, the pitch axis 45 is limited to avoid shaking or displacement when the pitch axis 45 rotates, the pitch drive mechanism 4 also includes an external shaft 47, a connecting shaft 48 and an outer sheath 49; the end of the pitch axis 45 is connected to the external shaft 47 through the connecting shaft 48, the pitch axis 45 passes through the slewing bearing 46, and an outer sheath 49 is provided on the outer side of one end of the pitch axis 45; the outer sheath 49 is rotatably connected to the pitch axis 45, and The outer sheath 49 is installed in the right arm assembly 1; the outer side of the circumscribed shaft 47 is rotatably connected to the support frame 471, and the other end of the support frame 471 is installed in the right arm assembly 1; the outer side of the connecting shaft 48 is rotatably connected to the limiting frame 481; the other end of the limiting frame 481 is installed in the right arm assembly 1; in order to achieve a stable connection between the circumscribed shaft 47 and the connecting shaft 48; the end of the circumscribed shaft 47 forms a "cross"-shaped protrusion, and the end of the connecting shaft 48 forms a "cross"-shaped groove; the protrusion is matched with the groove. When the pitch axis 45 rotates, it can drive the circumscribed shaft 47 and the connecting shaft 48 to rotate in the support frame 471 and the limiting frame 481, and can limit the rotation of the pitch axis 45 to avoid shaking or displacement during rotation, reduce energy loss, and delay the service life of the equipment.

[0038] The bottom ends of the left arm assembly 2 and the right arm assembly 1 are detachably connected with a turntable 5; specifically, the cross section of the turntable 5 adopts a "U"-shaped structure, and the corners of the turntable 5 are chamfered; the right arm assembly 1 and the left arm assembly 2 are connected to both sides of the top of the turntable 5 by bolts. The inside of the turntable 5 forms a cylindrical cylinder, and the cylinder is bolted to the azimuth rotating bracket; the inside of the turntable 5 forms a grid structure.

[0039] The center of the bottom end of the turntable 5 is connected to an azimuth rotation bracket 9, and the bottom end of the azimuth rotation bracket 9 is connected to an azimuth change transition plate 7; the bottom end of the exemplary azimuth rotation bracket 9 is rotated to connect the azimuth change transition plate 7, and the azimuth change transition plate 7 is used for overall installation to achieve the installation and use of the entire two-dimensional turntable; the bottom end of the turntable 5 is provided with an azimuth drive mechanism 6, and the azimuth drive mechanism 6 is used to drive the turntable 5 to rotate; Figure 5As shown, the azimuth driving mechanism 6 includes a motor 61, a reducer 62, a pinion 63, a slewing bearing 64, a housing 65 and a mounting plate 66; the slewing bearing 64 is connected to the turntable 5, and a large gear 641 is provided on the outer side of the slewing bearing 64; the large gear 641 meshes with two small gears 63, each of the small gears 63 is connected to a reducer 62, and each of the reducers 62 is connected to the output end of the motor 61, a mounting plate 66 is provided on the outer side of the reducer 62, and a housing 65 is provided on the outer side of the large gear 641, and the housing 65 and the mounting plate 66 are connected by bolts. The azimuth drive mechanism 6 of the present invention has two drive units, and the two drive units have the same structure, and are composed of a servo motor 2 61, a reducer 2 62, a small gear 2 63 and a mounting plate 66, wherein the meshing backlash between the small gear 2 63 and the large gear 2 641 outside the slewing bearing 2 64 is adjusted by adjusting the position of the mounting plate 66, and the backlash of the single-side final transmission chain is controlled between 0.4-0.6mm. When adjusting the azimuth of the radar antenna, the motor 2 61 is driven, and the motor 2 61 drives the small gear 2 63 to rotate, thereby driving the large gear 2 641 meshing therewith to rotate, and when the large gear 2 641 rotates, it drives the slewing bearing 2 64 and the turntable 5 to rotate, thereby driving the radar antenna to rotate and change its azimuth.

[0040] The azimuth servo system of the present invention adopts a dual-motor driven structure and achieves a precise tracking function through dual-motor backlash elimination. Dual-motor backlash elimination means that two motors mesh with a large gear and a small gear and are driven according to a dual-motor backlash elimination control curve. At any time, at least one of the two motors will apply a non-zero torque to the main gear, and under the action of this torque, the motion backlash of the main gear is eliminated.

[0041] The slewing bearing of the present invention is preferably a high-precision slewing bearing manufactured by Luoyang LYC Bearing Co., Ltd.

[0042] The side of the azimuth rotating bracket 9 and the side of the pitch driving mechanism 4 are provided with a rotary transformer 8; the rotary transformer 8 adopts a dual-channel rotary transformer 8; the two ends of the pitch axis 45; specifically, the pitch angle measuring device adopts a rotary transformer, which is a small AC motor for measuring angles, and is also an electromagnetic sensor used to measure the angular displacement and angular velocity of the rotating shaft of a rotating object, and is composed of a stator and a rotor. The dual-channel rotary transformer has the following advantages:

[0043] 1. Unparalleled reliability and excellent ability to resist harsh environmental conditions;

[0044] 2. Can run at high speed;

[0045] 3. Convenient absolute value signal numerical output.

[0046] The present invention arranges a rotary transformer at each end of the pitch axis for pitch angle measurement. The present invention intends to use an 18-bit dual-channel rotary transformer. The rotary transformer has a stable technical state, controllable risks, and can ensure an accuracy of ≤10".

[0047] The side of the azimuth rotating bracket 9 is provided with a rotary transformer 8; specifically, the azimuth angle measuring device adopts a high-precision rotary transformer. The rotary transformer is a micro motor for control and also an electromagnetic sensor. It is a small AC motor for measuring angles. It is used to measure the angular displacement and angular velocity of the rotating shaft of a rotating object and is composed of a stator and a rotor. The dual-channel rotary transformer has the following advantages:

[0048] 1. Unparalleled reliability and excellent ability to resist harsh environmental conditions;

[0049] 2. Can run at high speed;

[0050] 3. Convenient absolute value signal numerical output.

[0051] The azimuth angle is planned to be measured by a rotary transformer. In the present invention, an 18-bit dual-channel rotary transformer is planned to be used. The rotary transformer has a stable technical status and controllable risks. The precision of the precision machine can be guaranteed to be ≤10″ through screening.

[0052] The control principle diagram of the present invention is as follows: Figure 7 As shown, the rotary transformer 8 connected to the motor 1 41 and the pitch axis 45 is connected to the pitch control box; the motor 2 61 and the rotary transformer 8 set on the side of the azimuth rotating bracket 9 are connected to the azimuth control box; the pitch control box is connected to the array optical terminal, and the azimuth control box is connected to the platform optical terminal; the array optical terminal is connected to the platform optical terminal, and the array optical terminal is connected to the array monitoring module. The pitch control box and the azimuth control box both include a control module, a safety protection module, a drive module and an angle encoding module; the control module is connected to the safety protection module, the drive module and the angle encoding module; the angle encoding module is connected to the rotary transformer 8; the drive module of the pitch control box is connected to the motor 1, and the drive module of the azimuth control box is connected to the motor 2. The control module of the present invention is the core of the servo control system, which realizes the real-time calculation and implementation of the antenna base motion control strategy, and finally completes the accurate and stable tracking of the antenna to the target. The control module completes the position loop control, and the loop design is a typical second-order system.

[0053] The drive module is mainly composed of a control unit and a power unit. It mainly completes power amplification and energy conversion, realizes current, speed and anti-backlash control, drives the antenna to rotate at a given speed, and is the basis for realizing position control. The drive module is a current (torque) and speed dual closed-loop speed regulation system. In addition to receiving control instructions from the control unit, it also has independent control and safety protection functions.

[0054] The present invention adopts a dual-motor driven structure and achieves a precise tracking function by eliminating backlash with dual motors.

[0055] High azimuth dynamic tracking accuracy, pitch dynamic tracking accuracy, and mechanical pointing accuracy;

[0056] The control unit is the core of the servo control system, which realizes the real-time calculation and implementation of the antenna base motion control strategy, and ultimately completes the antenna's accurate and stable tracking of the target.

[0057] The present invention is a two-dimensional turntable, which is used for automatic aiming of radar antennas, aiming motion control of missile launchers, etc. The two-dimensional turntable is mainly composed of a turntable, a slewing bearing, an azimuth drive mechanism, a rotation assembly, an azimuth rotary transformer, a base, a pitch bracket, a pitch drive mechanism, and a pitch rotary transformer. The main function of the two-dimensional turntable is to support the antenna and provide the antenna with mechanical scanning, tracking and orientation functions of azimuth / pitch; at the same time, it provides synchronous azimuth / pitch position information in real time.

[0058] The advantages of the present invention are:

[0059] High precision: ① Azimuth: dynamic tracking accuracy: ≤0.08°, ② Pitch: dynamic tracking accuracy: ≤0.08°, ③ Mechanical pointing accuracy: ≤20″;

[0060] Versatility: The photoelectric theodolite used for the reflective swing mirror can also be applied to the automatic aiming and tracking control of radar antennas, the aiming and motion control of tactical missile launchers, the tracking of military targets, etc. In addition, the two-dimensional turntable is also widely used in experimental research and is often used for precise control experiments in electromechanical laboratories;

[0061] Widely used in scenarios: In aerospace and national defense construction, two-dimensional turntables are used for semi-physical simulation and testing of aircraft to help develop high-performance aircraft. In the military, two-dimensional turntables are used for automatic aiming of radar antennas, aiming motion control of missile launchers, etc. In experimental research, two-dimensional turntables are commonly used experimental equipment that can complete precise control tasks.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radar antenna pedestal, characterized in that: The invention comprises a radar antenna body (3), wherein two ends of the radar antenna body (3) are respectively connected to a left arm assembly (2) and a right arm assembly (1) through two pitch drive mechanisms (4); the pitch drive mechanism (4) is used to drive the radar antenna body (3) to rotate between the left arm assembly (2) and the right arm assembly (1); a turntable (5) is detachably connected to the bottom ends of the left arm assembly (2) and the right arm assembly (1); an azimuth rotation bracket (9) is connected to the center of the bottom end of the turntable (5), and the bottom end of the azimuth rotation bracket (9) is connected to an azimuth conversion transition plate (7); an azimuth drive mechanism (6) is provided at the bottom end of the turntable (5), and the azimuth drive mechanism (6) is used to drive the turntable (5) to rotate; a rotary transformer (8) is provided on the side of the azimuth rotation bracket (9) and the side of the pitch drive mechanism (4), and the rotary transformer (8) is used to measure the azimuth rotation angle and the pitch rotation angle.

2. A radar antenna pedestal according to claim 1, characterized in that: The pitch drive mechanism (4) comprises a motor (41), a reducer (42), an eccentric sleeve (43), a pinion (44), a pitch shaft (45) and a slewing bearing (46); the pitch shaft (45) is connected to the radar antenna body (3), and a slewing bearing (46) is provided outside the pitch shaft (45); a large gear (461) is provided outside the slewing bearing (46), and the large gear (461) meshes with the pinion (44); the output end of the motor (41) is connected to the reducer (42), and an eccentric sleeve (43) is provided outside the output end of the reducer (42); the output end of the reducer (42) is connected to the pinion (44).

3. A radar antenna pedestal according to claim 2, characterized in that: The pitch drive mechanism (4) further comprises an external shaft (47), a connecting shaft (48) and an outer sleeve (49); the end of the pitch shaft (45) is connected to the external shaft (47) via the connecting shaft (48), and an outer sleeve (49) is provided on the outer side of one end of the pitch shaft (45); the outer side of the external shaft (47) is rotatably connected to a support frame (471), and the outer side of the connecting shaft (48) is rotatably connected to a limit frame (481); the other ends of the support frame (471) and the limit frame (481) are arranged in the right support arm assembly (1).

4. A radar antenna pedestal according to claim 3, characterized in that: The end of the circumscribed shaft (47) forms a protrusion in a "cross"-shaped structure, and the end of the connecting shaft (48) forms a groove in a "cross"-shaped structure; the protrusion is cooperatively connected with the groove.

5. The radar antenna pedestal according to claim 2, characterized in that: The azimuth driving mechanism (6) comprises a second motor (61), a second reducer (62), a second pinion (63), a second slewing bearing (64), a housing (65) and a mounting plate (66); the second slewing bearing (64) is connected to the turntable (5), and a second large gear (641) is provided on the outer side of the second slewing bearing (64); the second large gear (641) meshes with two second small gears (63), each of the second small gears (63) is connected to a second reducer (62), and each of the second reducers (62) is connected to the output end of the second motor (61), a mounting plate (66) is provided on the outer side of the second reducer (62), and a housing (65) is provided on the outer side of the second large gear (641), and the housing (65) and the mounting plate (66) are connected by bolts.

6. A radar antenna pedestal according to claim 5, characterized in that: The cross section of the turntable (5) adopts a "U"-shaped structure, and the corners of the turntable (5) are chamfered; the right support arm assembly (1) and the left support arm assembly (2) are connected to both sides of the top of the turntable (5) by bolts.

7. The radar antenna pedestal according to claim 6, characterized in that: The interior of the turntable (5) forms a cylindrical cylinder, and the cylinder is bolted to the azimuth rotating bracket (9); the interior of the turntable (5) forms a grid structure.

8. The radar antenna pedestal according to any one of claim 6, characterized in that: The rotary transformer (8) is a dual-channel rotary transformer (8); rotary transformers (8) are provided at both ends of the pitch axis (45) and on the side of the azimuth rotation bracket (9).

9. The radar antenna pedestal according to claim 8, characterized in that: The rotary transformer (8) connected to the pitch axis (45) of the motor 1 (41) is connected to the pitch control box; the rotary transformer (8) arranged on the side of the azimuth rotating bracket (9) of the motor 2 (61) is connected to the azimuth control box; the pitch control box is connected to the array optical terminal, and the azimuth control box is connected to the platform optical terminal; The array optical terminal is connected to the platform optical terminal, and the array optical terminal is connected to the array monitoring module.

10. The radar antenna pedestal according to claim 9, characterized in that: The pitch control box and the azimuth control box both comprise a control module, a safety protection module, a drive module and an angle encoding module; the control module is connected to the safety protection module, the drive module and the angle encoding module; and the angle encoding module is connected to a rotary transformer (8).

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