RU127502U1 - DEVICE FOR DETERMINING THE DIRECTION OF THE BEAM, COORDINATES AND RADIO ANTENNA MOVEMENT SPEEDS - Google Patents

Abstract

A device for determining the direction of the beam, the coordinates and the speed of the antenna of a radar station, comprising an antenna, characterized in that it includes a strapdown inertial navigation system (SINS) built into the radar antenna, an electronic computer and a navigation receiver signals of GLONASS / NAVSTAR systems, the input and output of the SINS connected to the input-output of the computer, and the output of the navigation receiver with the input of the computer, providing data from the navigation receiver to the SINS for the initial position avki (self-orientation) SINS and implements the processing of information from the SINS and the navigation receiver, and the computer output is the output of the device.

Description

The utility model relates to the field of radar technology and can be used in radar stations (radar) to determine in motion the orientation of the radar antenna, its coordinates and motion parameters

A device for converting the angular displacement of a radar antenna in the azimuthal plane [1], comprising an antenna and a series-connected block of azimuthal sensors kinematically (via a reducer) connected to the antenna shaft, an adder, as well as a correction code sensor, the output of which is connected to the second input of the adder, output which is the output of the device.

The disadvantage of this device is the presence in its output information of an uncompensated functional angular error, which within each revolution of the antenna shaft changes with an error of the kinematic circuit of the gearbox. This error depends mainly on the errors of the gear on the antenna shaft and has a character close to sinusoidal [2], depending on the angle of rotation of the antenna shaft.

Another disadvantage of the known device is that the orientation of the radar antenna relative to the north direction should be carried out according to the previously known azimuth of the local object (to eliminate the systematic component of the azimuthal error using the correction code sensor), i.e. the position at which the radar is installed must be prepared in advance, which is not always possible.

The disadvantage of this device is the inability to determine the azimuth of the radar antenna when moving along a random path.

A device [3] is also known (see FIG. 1), which allows the operation of orienting the radar antenna when placing it at both prepared and unprepared positions. This device, in addition to the antenna, gearbox, azimuth sensor unit - angle-to-code converter [4], adder and correction code sensor, contains an automatic navigation system (ASN) and a switch.

ASN contains the navigation equipment of consumers (NAP) of the GLONASS / GPS systems with the goniometer channel and can be performed, for example, in accordance with [5].

In the device, the block of azimuth sensors 3, kinematically through a gear 2 connected to the shaft of the antenna 1, converts the angle of rotation of the shaft of the antenna 1 into a digital code, which is added to the adder 4 with a digital correction code generated either by the sensor of the correction code 5 (only with manual orientation of the radar antenna on prepared positions), or ASN 7 (with automatic orientation of the radar antenna both on prepared and unprepared positions). The digital correction code is fed to the adder 4 through switch 6. The output of the adder 4 is the output of the device.

The disadvantage of this device, as well as the analogue [1], is the presence in its output information of the error of gear 2 and the impossibility of determining the current azimuth of the radar antenna in motion, that is, the impossibility of the radar operating in motion.

A device [6] is known (see FIG. 2), adopted as a prototype, which comprises an antenna 1 connected in series through a reducer 2 with an azimuth sensor unit 3, an adder 4, and an amendment code 5 sensor and ASN 7 (GLONASS / NAP systems) GPS with a goniometer channel located on the antenna 1) the output of which is connected to the second input of the switch 6, and the sensor of the correction code 5 through the second input of the adder 4 is connected to the first input of the switch 6, the output of which is the output of the device.

The output of switch 6 may be connected to its first or second input.

With a sector overview and setting switch 6 to position 2, at the output of the device, the information will correspond to the exact direction of the radar antenna in the azimuthal plane.

In the circular viewing mode, the exact information about the azimuthal direction of antenna 1 obtained from ASN 7 cannot be used, because the frequency of updating information (up to 10 Hz) is significantly less than the frequency of change of the azimuthal code of the antenna during its rotation (-400 Hz with a 12-bit azimuthal code and antenna rotation speed of 6 rpm).

The disadvantage of this device, as well as the analogues described above, is the presence in its output information of the error of gear 2 during rotation of the antenna 1 and the inability to determine the current azimuth of the radar antenna in motion, that is, the inability of the radar to work in motion.

A common drawback of both analogs and the prototype is the impossibility of high-precision determination in the movement of the beam direction of the radar antenna, taking into account its roll and pitch, as well as the coordinates and speed of the antenna.

The technical result of the proposed utility model is the high-precision determination of the coordinates of the radar antenna, its azimuth, roll and pitch angles in motion.

The indicated technical result is achieved by the fact that a strap-down inertial navigation system (SINS) [7] integrated into the radar antenna, a computer and a navigation signal receiver of GLONASS / NAVSTAR systems [7] is introduced into the proposed utility model containing a rotating antenna. The input and output of the SINS is connected to the input-output of the computer, the input of the computer is connected to the output of the navigation receiver, the computer transmits data from the navigation receiver to the SINS for the initial exhibition (self-orientation) of the SINS. The integrated information from the SINS and the navigation receiver after processing in the computer is fed to the output of the device.

The device (see Figure 3) contains an antenna 1, a built-in SINS 8, a computer 9 and a navigation receiver 10. The input-output SINS 8 (information about the azimuth, roll angles and pitch of the radar antenna) is connected to the input-output of the computer 9, and the input of the computer 9 is connected to the output of the navigation receiver 10 (information about the coordinates and speed of the antenna), the output of the computer 9 (integrated information about the direction of the beam of the radar antenna taking into account its roll and pitch, as well as the current coordinates and speed of the antenna) is the output of the device .

The device operates as follows.

In the manufacture of a radar antenna, it is aligned, i.e. reduction of azimuth data obtained from SINS 8 to azimuth data of the normal beam of antenna 1 obtained by its instrumental topographic location.

Before using the device for its intended purpose, an initial exhibition of SINS 8 is held according to the coordinates of the place coming from the navigation receiver 10 via computer 9.

After the initial exhibition, the device operates with a stationary and moving radar, with any azimuthal position of antenna 1. Information about the orientation of the antenna, the coordinates and parameters of its movement is generated at the output of the computer 9 with a refresh rate of 200 Hz.

The rotation of the antenna 1 is carried out using a drive and gear.

Currently, the proposed device is manufactured and tested as part of an aircraft.

The inclusion in the composition of the proposed utility model of a strapdown inertial navigation system integrated with the navigation receiver of GLONASS / NAVSTAR systems provided a highly accurate determination of the coordinates of the radar antenna, its azimuth, roll angles and pitch in the movement.

Information sources

1 Device for converting the angular displacement of the radar antenna A.S. USSR No. 184203, s. No. 3041778, priority dated 05/10/1982, IPC G08C 9/00.

2 Basics of calculating the accuracy of kinematic chains of metal cutting machines. Engineering, Moscow, 1966

3 Device for converting the angular movement of the radar antenna RF Patent No. 44879, s. No. 2004133727, priority dated November 18, 2004

4 Converter angle of rotation of the shaft in the code. RF patent No. 2240650, application No. 2003108801, priority date 01.04.2003

5 “GLONASS Global Satellite Radio Navigation System” edited by V.N. Kharisova, A.I. Petrova, V.A. Boldina, Moscow, Moscow, 1998

6 Device for determining the direction of the radar antenna in the azimuthal plane RF Patent No. 115504, s. No2011138892, priority of September 22, 2011

7 Babich O.A. Information processing in navigation systems, Ed. M, Mechanical Engineering, 1991. UDC 621.396.98 B12.

Claims (1)

A device for determining the direction of the beam, the coordinates and the speed of the antenna of a radar station, comprising an antenna, characterized in that it includes a strapdown inertial navigation system (SINS) built into the radar antenna, an electronic computer and a navigation receiver signals of GLONASS / NAVSTAR systems, the input and output of the SINS connected to the input-output of the computer, and the output of the navigation receiver with the input of the computer, providing data from the navigation receiver to the SINS for the initial position avki (self-orientation) SINS and implements the processing of information from the SINS and the navigation receiver, and the computer output is the output of the device.

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