阅读说明：本技术 同轴馈电机载气象雷达伺服传动平台 (Coaxial feed airborne weather radar servo transmission platform ) 是由 孟武亮 郭虎刚 童晖 袁亚利 杨莉春 马振锋 李方华 吉涛 周伟佳 陈虎 宋思言 于 2020-12-08 设计创作，主要内容包括：本发明公开了一种同轴馈电机载气象雷达伺服传动平台,其包括俯仰传动单元、方位传动单元、基座、天线安装架、天线和同轴旋转关节。该俯仰传动单元和方位传动单元安装在基座上,该天线安装架和天线连接后安装在俯仰传动单元上,该同轴旋转关节分别安装在俯仰传动单元和方位传动单元上。当伺服传动平台接收到控制指令和数据信号时,俯仰传动单元和方位传动单元带动雷达天线进行空域扫描,捕获、跟踪目标,并将角度、速度反馈回基座内部与期望值进行比较并修正,使平台形成一个闭环控制系统。本发明改善了电缆在转动过程中的交叉干涉和磨损,减小了天线重量,降低了天线加工精度和平台重量,可用于各种飞行器的机载气象雷达天线机械扫描控制。(The invention discloses a coaxial feed airborne weather radar servo transmission platform which comprises a pitching transmission unit, an azimuth transmission unit, a base, an antenna mounting frame, an antenna and a coaxial rotary joint. The pitching transmission unit and the azimuth transmission unit are installed on the base, the antenna installation frame and the antenna are installed on the pitching transmission unit after being connected, and the coaxial rotary joint is installed on the pitching transmission unit and the azimuth transmission unit respectively. When the servo transmission platform receives the control instruction and the data signal, the pitching transmission unit and the azimuth transmission unit drive the radar antenna to carry out airspace scanning, capture and track a target, and feed back the angle and the speed to the inside of the base to be compared with an expected value and corrected, so that the platform forms a closed-loop control system. The invention improves the cross interference and abrasion of the cable in the rotation process, reduces the weight of the antenna, reduces the processing precision of the antenna and the weight of the platform, and can be used for mechanical scanning control of airborne weather radar antennas of various aircrafts.)

1. A coaxial feed airborne weather radar servo drive platform, comprising: the device comprises a pitching transmission unit (1), an azimuth transmission unit (2), a base (3), an antenna mounting rack (4), an antenna (5) and a coaxial rotary joint (6); this every single move transmission unit (1) and position transmission unit (2) are installed on base (3), install on every single move transmission unit (1) after this antenna mounting bracket (4) and antenna (5) are connected, and this coaxial rotary joint (6) is installed respectively on every single move transmission unit (1) and position transmission unit (2), its characterized in that:

the antenna (5) adopts a microstrip antenna, so that the weight and the processing cost of the antenna are reduced, and the processing period and the processing precision of the antenna are reduced;

electric signals between the microstrip antenna (5) and the inside of the base (3) are transmitted through a semi-rigid coaxial cable, coaxial rotary joints (6) are installed on the pitching transmission unit (1) and the azimuth transmission unit (2), and the static semi-rigid coaxial cable and the dynamic semi-rigid coaxial cable are connected in series through the coaxial rotary joints (6) so as to improve the problems of cross interference and abrasion of the cables in the rotation process of the platform.

2. Platform according to claim 1, characterized in that the pitch transmission unit (1) comprises a pitch motor (11), a pitch reducer (12), a pitch reduction gear pair (13), a pitch angle potentiometer (14) and a pitch member (15); the pitch reduction gear pair (13) is in primary gear transmission, the pitch reducer (12) and the pitch reduction gear pair (13) jointly form a reduction mechanism of the pitch transmission unit (1), the pitch motor (11) and the pitch reducer (12) are installed on a pitch component (15) in a clearance fit mode, and a rotating shaft of the pitch component (15) is concentrically connected with a rotating shaft of the pitch angle potentiometer (14).

3. Platform according to claim 1, characterized in that the azimuth drive unit (2) comprises an azimuth motor (21), an azimuth reducer (22), an azimuth reduction gear pair (23), an azimuth angle potentiometer (24), an azimuth member (25), a left yoke (26), a right yoke (27) and a drive box (28); the azimuth reduction gear pair (23) is in primary gear transmission, the azimuth reducer (22) and the azimuth reduction gear pair (23) jointly form a reduction mechanism of the azimuth transmission unit (2), the azimuth motor (21) and the azimuth reducer (22) are installed on a driving box (28) in a clearance fit mode, a rotating shaft of an azimuth component (25) is concentrically connected with a rotating shaft of an azimuth angle potentiometer (24), and the left fork arm (26), the right fork arm (27) and the driving box (28) are installed on the base (3) respectively.

4. The platform of claim 2, wherein the pitch member (15) comprises a pitch bracket (151), an azimuth bracket (152), a potentiometer mount (153), a half-ring (154), an angular contact bearing (155), a stop (156), a spacer (157), and an end cap (158); the inner ring of the angular contact bearing (155) is installed on rotating shafts at the left end and the right end of a pitching support (151) in an interference fit mode and is connected with an azimuth support (152) through an installation hole of a semicircular ring (154), the lower half part of the outer ring of the angular contact bearing is installed at a corresponding semicircular position of the azimuth support (152), the upper half part of the outer ring of the angular contact bearing is installed in a matched mode with the semicircular ring (154) so as to limit the outer ring of the angular contact bearing (155) through shaft shoulder contact, the baffle plate (156) is installed on the inner ring of the angular contact bearing (155) to prevent the inner ring of the angular contact bearing (155) from axially moving, the adjusting gasket (157) is filled between the baffle plate (156) and the inner ring of the angular contact bearing (155), the end cover (158) is installed on the pitching support (151), and the potentiometer.

5. Platform according to claim 2 or 4, wherein said pitch reduction gear pair (13) comprises a pitch reduction gear (131) and a pitch reduction gear (132); the pitching speed reducing gear (131) is in clearance fit with a rotating shaft of the pitching support (151) and is fixed on the azimuth support (152) through a semicircular ring (154), and the pitching speed reducing gear (132) is in tight fit connection with an output shaft of the pitching speed reducer (12).

6. The platform of claim 3, wherein the orientation member (25) comprises an end cap (251), an angular contact bearing (252), a stop (253), an adjustment pad (254), a potentiometer mount (255), and an orientation bracket (256); the end covers (251) are respectively arranged on the left fork arm (26) and the right fork arm (27), and the inner rings of the angular contact bearings (252) are arranged on rotating shafts at the left end and the right end of an azimuth bracket (256). The outer ring is arranged in corresponding holes of the left fork arm (26) and the right fork arm (27) in an interference fit mode to limit the outer ring of the angular contact bearing (252) through shaft shoulder contact, and the baffle (253) is arranged on the inner ring of the angular contact bearing (252) to prevent the inner ring of the angular contact bearing (252) from axially moving; the adjusting shim 254 is filled between the baffle 253 and the inner ring of the angular contact bearing 252, and the potentiometer mounting member 255 is mounted on the end cover 251.

7. A platform according to claim 3 or 6, characterized in that said azimuth reduction gear pair (23) comprises an azimuth reduction gear (231) and an azimuth reduction gear (232); the azimuth reducing gear (231) is positioned and then installed on the azimuth bracket (256), the centers of the rotating shafts of the azimuth reducing gear and the azimuth bracket are overlapped, and the azimuth reducing gear (232) is connected with the output shaft of the azimuth reducer (22) in a tight fit mode.

8. Platform according to claim 1, characterized in that the base (3) is machined integrally from an aluminium alloy, has a cross section similar to an octagon, has a wall thickness of 3mm at the thinnest point and 4mm at the thickest point, and is used as a support for the entire servo transmission platform.

9. The platform of claim 1, wherein the antenna mounting frame (4) is made of carbon fiber, and the carbon fiber has the characteristic of low specific gravity, so that the weight of the servo transmission platform is reduced while the strength and the rigidity of the carbon fiber meet the requirements.

Technical Field

The invention belongs to the technical field of electronic equipment, and particularly relates to an airborne weather radar servo transmission platform which can be used for mechanical scanning control of radar antennas of various aircrafts.

Background

The servo transmission platform of the airborne weather radar is electromechanical integrated equipment for searching, capturing a target, tracking and measuring the position and various motion parameters of the target by the airborne weather radar, drives a radar antenna to move in a pitching and azimuth dimension according to a motion rule given by a radar system, so that the radar can realize the functions of capturing and tracking the target, and simultaneously feeds back the information of the pitching and azimuth dimension angle motion to the radar system, so that the radar system can accurately judge the position of the target.

Signals between the antenna and the transceiver module of the existing airborne weather radar servo transmission platform are transmitted through waveguides or cables, the weight and the volume of the servo transmission platform can be increased in a waveguide transmission mode, the problems of cross interference and abrasion of the cables in pitching dimension and azimuth dimension can occur in a cable transmission mode, and the reliability of the cables is reduced, and the service life of the cables is shortened.

The existing airborne weather radar servo transmission platform antenna generally adopts a flat plate crack array antenna, and has the advantages of heavy weight, high processing precision, long period, complex process and high cost.

The existing airborne weather radar servo transmission platform mostly adopts a transmission mode of adding a reduction gearbox to a motor or directly driving the motor, and the reduction gearbox is generally in multi-stage dead axle gear transmission. The multi-stage dead axle gear reduction box with large transmission ratio has large volume, heavy weight, poor transmission precision and large total return difference. In the direct-drive transmission mode of the motor, although a middle speed reducing mechanism is omitted, a large-torque motor needs to be selected, the large-torque motor is large in size, and the motor needs a larger space to be installed.

Disclosure of Invention

The invention aims to provide a coaxial feed airborne weather radar servo transmission platform aiming at the defects of the prior art, so as to solve the problems of cross interference and abrasion of a cable in the rotating process, reduce the weight and the processing cost of an antenna, reduce the processing period and the processing precision of the antenna, reduce the volume of the servo transmission platform, reduce the weight and the total return difference, and improve the servo transmission precision and the control performance.

The technical idea of the invention is as follows: the static semi-rigid coaxial cable and the dynamic semi-rigid coaxial cable of the platform are connected in series by selecting the coaxial rotary joint in the pitching dimension and the azimuth dimension, so that the problems of cross interference and abrasion of the cables in the pitching dimension and azimuth dimension rotating processes are solved, the weight and the processing cost of the antenna are reduced by selecting the microstrip antenna, the processing period and the processing precision of the antenna are reduced, the volume of the servo transmission platform is reduced by adopting a transmission mode of the brushless direct current servo motor, the planetary reducer and the primary reduction gear pair, the weight and the total return difference are reduced, and the servo transmission precision and the control performance are improved.

According to the technical idea, the coaxial feed airborne weather radar servo transmission platform comprises a pitching transmission unit 1, an azimuth transmission unit 2, a base 3, an antenna mounting rack 4, an antenna 5 and a coaxial rotary joint 6, wherein the pitching transmission unit 1 and the azimuth transmission unit 2 are mounted on the base 3, the antenna mounting rack 4 and the antenna 5 are connected and then mounted on the pitching transmission unit 1, and the coaxial rotary joint 6 is respectively mounted on the pitching transmission unit 1 and the azimuth transmission unit 2, and is characterized in that:

the antenna 5 adopts a microstrip antenna, so that the weight and the processing cost of the antenna are reduced, and the processing period and the processing precision of the antenna are reduced.

Electric signals between the microstrip antenna 5 and the inside of the base 3 are transmitted through a semi-rigid coaxial cable, coaxial rotary joints 6 are installed on the pitching transmission unit 1 and the azimuth transmission unit 2, and the static semi-rigid coaxial cable and the dynamic semi-rigid coaxial cable are connected in series through the coaxial rotary joints 6, so that the problems of cross interference and abrasion of the cables in the rotation process of the platform are solved.

Further, the pitch transmission unit 1 includes a pitch motor 11, a pitch reducer 12, a pitch reduction gear pair 13, a pitch angle potentiometer 14, and a pitch member 15; the pitch reduction gear pair 13 is a primary gear transmission, the pitch reducer 12 and the pitch reduction gear pair 13 together form a reduction mechanism of the pitch transmission unit 1, the pitch motor 11 and the pitch reducer 12 are mounted on a pitch member 15 in a clearance fit manner, and a rotating shaft of the pitch member 15 is concentrically connected with a rotating shaft of the pitch angle potentiometer 14.

Further, the azimuth transmission unit 2 comprises an azimuth motor 21, an azimuth reducer 22, an azimuth reduction gear pair 23, an azimuth angle potentiometer 24, an azimuth component 25, a left fork arm 26, a right fork arm 27 and a driving box 28; the azimuth reduction gear pair 23 is a one-stage gear transmission, the azimuth reducer 22 and the azimuth reduction gear pair 23 together form a reduction mechanism of the azimuth transmission unit 2, the azimuth motor 21 and the azimuth reducer 22 are mounted on a drive box 28 in a clearance fit manner, a rotation shaft of the azimuth member 25 is concentrically connected with a rotation shaft of the azimuth angle potentiometer 24, and the left yoke 26, the right yoke 27 and the drive box 28 are respectively mounted on the base 3.

Further, the base 3 is formed by integrally machining aluminum alloy, the cross section of the base is similar to an octagon, the thinnest part of the wall thickness is 3mm, the thickest part is 4mm, and the base is used as a support of the whole servo transmission platform.

Further, the antenna mounting frame 4 is formed by processing carbon fibers, and the carbon fibers have the characteristic of small specific gravity, so that the strength and the rigidity of the carbon fibers meet the requirements, and the weight of the servo transmission platform is reduced.

Compared with the prior art, the invention has the following advantages:

1. the invention has the advantages of light weight and low cost due to the adoption of the microstrip antenna, thereby reducing the weight and the processing cost of the antenna and reducing the processing period and the processing precision of the antenna.

2. The static semi-rigid coaxial cable and the dynamic semi-rigid coaxial cable are connected in series through the coaxial rotary joint 6, and the problems of cross interference and abrasion of the cables in the rotation process of the platform are solved.

3. Because the invention adopts the speed reducing mechanism of the primary gear pair and the planetary reducer on the pitching transmission unit 1 and the azimuth transmission unit 2, the volume of the servo transmission platform is reduced, the weight and the total return difference of the servo transmission platform are reduced, and the precision and the transmission efficiency of the servo transmission platform are improved.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is an overall structural view of the present invention;

FIG. 3 is a cutaway view of a pitch drive unit of the present invention;

fig. 4 is a sectional view of the azimuth drive unit in the present invention.

Detailed Description

Examples of the present invention are described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the servo transmission platform of the present invention includes a pitch transmission unit 1, an azimuth transmission unit 2, a base 3, an antenna mounting frame 4, an antenna 5, and a coaxial rotary joint 6. The pitching transmission unit 1 and the azimuth transmission unit 2 are installed on the base 3, the antenna mounting rack 4 and the antenna 5 are connected and then installed on the pitching transmission unit 1, and the coaxial rotary joints 6 are respectively installed on the pitching transmission unit 1 and the azimuth transmission unit 2. When the servo transmission platform receives a control instruction and a data signal, the pitching transmission unit 1 and the azimuth transmission unit 2 drive the radar antenna to carry out airspace scanning, so that a target is captured and tracked, and meanwhile, the pitching transmission unit 1 and the azimuth transmission unit 2 feed back angle and speed data to the inside of the base 3 in real time to be compared and corrected with an expected value, so that the servo transmission platform forms a closed-loop control system.

With reference to fig. 2, the structural details of this example are described as follows:

the pitch transmission unit 1 comprises a pitch motor 11, a pitch reducer 12, a pitch reduction gear pair 13, a pitch angle potentiometer 14 and a pitch component 15; the pitch reduction gear pair 13 is a primary gear transmission, the pitch reducer 12 and the pitch reduction gear pair 13 together form a reduction mechanism of the pitch transmission unit 1, the pitch motor 11 and the pitch reducer 12 are mounted on a pitch member 15 in a clearance fit manner, and a rotating shaft of the pitch member 15 is concentrically connected with a rotating shaft of the pitch angle potentiometer 14. After the pitching motor 11 is started, the pitching motor drives the radar antenna to move in the pitching dimension according to a given movement rule through the pitching reducer 12 and the pitching reduction gear pair 13, and the pitching angle potentiometer 14 monitors the pitching dimension movement angle and speed in real time and feeds back the pitching angle and speed information to the inside of the base 3 to be compared with an expected value and correct the information.

The azimuth transmission unit 2 comprises an azimuth motor 21, an azimuth reducer 22, an azimuth reduction gear pair 23, an azimuth angle potentiometer 24, an azimuth component 25, a left fork arm 26, a right fork arm 27 and a driving box 28; the azimuth reduction gear pair 23 is a one-stage gear transmission, the azimuth reducer 22 and the azimuth reduction gear pair 23 together form a reduction mechanism of the azimuth transmission unit 2, the azimuth motor 21 and the azimuth reducer 22 are mounted on a drive box 28 in a clearance fit manner, a rotation shaft of the azimuth member 25 is concentrically connected with a rotation shaft of the azimuth angle potentiometer 24, and the left yoke 26, the right yoke 27 and the drive box 28 are respectively mounted on the base 3. After the azimuth motor 21 is started, the radar antenna is driven to move in the azimuth dimension through the azimuth reducer 22 and the azimuth reduction gear pair 23 according to a given movement rule, and the azimuth angle potentiometer 24 monitors the azimuth dimension movement angle and speed in real time and feeds azimuth angle and speed information back to the inside of the base 3 to be compared with an expected value and correct the expected value.

The base 3 is formed by integrally machining aluminum alloy, the section of the base is similar to an octagon, the thinnest part of the wall thickness is 3mm, the thickest part is 4mm, and the base is used as a support of the whole servo transmission platform.

The antenna mounting frame 4 is formed by processing carbon fibers, and the carbon fibers have the characteristic of small specific gravity, so that the strength and the rigidity of the carbon fibers meet the requirements, and the weight of the servo transmission platform is reduced.

The antenna 5 adopts a microstrip antenna, and has the advantages of light weight and low cost, so that the weight and the processing cost of the antenna are reduced, and the processing period and the processing precision of the antenna are reduced.

The coaxial rotary joint 6 is respectively arranged on the pitching transmission unit 1 and the azimuth transmission unit 2 and is used for connecting the static semi-rigid coaxial cable and the dynamic semi-rigid coaxial cable in series, so that the problems of cross interference and abrasion of the cables in the rotation process of the platform are solved.

Referring to fig. 3, the pitch member 15 in the pitch transmission unit 1 includes a pitch bracket 151, an azimuth bracket 152, a potentiometer mount 153, a semicircular ring 154, an angular contact bearing 155, a baffle 156, an adjustment pad 157, and an end cover 158; the angular contact bearing 155, the inner ring of which is installed on the rotating shaft at the left and right ends of the pitch bracket 151 in an interference fit manner, is connected with the azimuth bracket 152 through the installation hole of the semicircular ring 154, the lower half part of the outer ring of which is installed at the corresponding semicircular position of the azimuth bracket 152, the upper half part of which is installed in a fit manner with the semicircular ring 154 to limit the outer ring of the angular contact bearing 155 through shaft shoulder contact, the baffle 156 is installed on the inner ring of the angular contact bearing 155 to prevent the inner ring of the angular contact bearing 155 from axially moving, the adjusting shim 157 is filled between the baffle 156 and the inner ring of the angular contact bearing 155, the end cover 158 is installed on the pitch bracket 151, and the potentiometer installation piece 153 is installed on the.

The pitch reduction gear pair 13 includes a pitch reduction gear 131 and a pitch reduction gear 132; the pitch reduction gear 131 is installed with a clearance fit with the rotation shaft of the pitch bracket 151 and fixed to the orientation bracket 152 by a semicircular ring 154, and the pitch reduction gear 132 is tightly fitted and connected to the output shaft of the pitch reducer 12.

Referring to fig. 4, the azimuth member 25 in the azimuth driving unit 2 includes an end cap 251, an angular contact bearing 252, a shutter 253, an adjustment pad 254, a potentiometer mounting 255, and an azimuth bracket 256; the end caps 251 are mounted on the left yoke 26 and the right yoke 27, respectively, and the inner rings of the angular bearings 252 are mounted on the left and right rotary shafts of the azimuth brackets 256. The outer ring is arranged in corresponding holes of the left fork arm 26 and the right fork arm 27 in an interference fit mode to limit the outer ring of the angular contact bearing 252 through shaft shoulder contact, and the baffle 253 is arranged on the inner ring of the angular contact bearing 252 to prevent the inner ring of the angular contact bearing 252 from axially moving; the adjustment shim 254 is filled between the baffle 253 and the inner race of the angular contact bearing 252, and the potentiometer mounting 255 is mounted on the end cap 251.

The azimuth reduction gear pair 23 includes an azimuth reduction gear 231 and an azimuth reduction gear 232; the azimuth reducing gear 231 is positioned and then mounted on the azimuth bracket 256, the centers of the rotating shafts of the azimuth reducing gear 231 and the azimuth bracket are overlapped, and the azimuth reducing gear 232 is connected with the output shaft of the azimuth reducer 22 in a tight fit manner.

The foregoing description is only an example of the present invention and is not intended to limit the invention, so that it will be apparent to those skilled in the art that various changes and modifications in form and detail may be made therein without departing from the spirit and scope of the invention.