CN108107424B - Missile-borne airspace search method based on servo dwell - Google Patents

Missile-borne airspace search method based on servo dwell Download PDF

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CN108107424B
CN108107424B CN201711190718.1A CN201711190718A CN108107424B CN 108107424 B CN108107424 B CN 108107424B CN 201711190718 A CN201711190718 A CN 201711190718A CN 108107424 B CN108107424 B CN 108107424B
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angle
servo
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dwell
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CN108107424A (en
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顾琴昱
陈泽礼
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Beijing Institute of Remote Sensing Equipment
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/66—Radar-tracking systems; Analogous systems
    • G01S13/68—Radar-tracking systems; Analogous systems for angle tracking only

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Abstract

The invention discloses a missile-borne airspace searching method based on servo residence, which is suitable for a passive radar system to search an aerial target. Setting a servo angle and residence time in a certain step length in the pitching direction and the azimuth direction respectively, measuring and analyzing the target, converting the measured angle into a measured angle of the target relative to the axis of the projectile body, and performing two-dimensional clustering calculation on the measured result from the pitching direction and the azimuth direction to find the real incoming wave direction. The missile-borne airspace search is carried out based on servo dwell, the method carries out servo dwell measurement in the azimuth dimension and the pitching dimension, the conversion measurement angle is calculated through the two-dimensional clustering of a plurality of angles, and the problems of fuzzy angle measurement and small search airspace in the traditional airspace search method are solved.

Description

Missile-borne airspace search method based on servo dwell
Technical Field
The invention relates to a space domain searching method, in particular to a missile-borne space domain searching method based on servo dwell.
Background
When the passive radar searches for an aerial target, the target frequency band is wide, the antenna unit is limited by engineering application, the general size is small, and the phenomenon of angle ambiguity often occurs.
Disclosure of Invention
The invention aims to provide a missile-borne airspace searching method based on servo residence, and solves the problems of fuzzy angle measurement and small searching airspace in the traditional airspace searching method.
A missile-borne airspace search method based on servo dwell comprises the following specific steps:
first step, radar direction finding system based on servo residence is constructed
A servo dwell based radar direction finding system comprising: the device comprises a target radiation source module, a servo module, a broadband receiving channel module, a signal processing module and a cable.
The target radiation source module is connected with the servo module through a cable, the servo module is connected with the broadband receiving channel module through a cable, and the broadband receiving channel module is connected with the signal processing module through a cable.
The function of the target radiation source module is: radiating a microwave signal;
the servo module has the functions of: controlling the receiving angle of the antenna according to the step length and the residence time;
the function of the broadband receiving channel module is as follows: down-converting the received microwave signal into an intermediate frequency analog signal;
the signal processing module has the functions of: the intermediate frequency analog signal is digitized, the phase information of the digital signal is measured, the angle is calculated, and the target incoming wave direction is measured through two-dimensional clustering of the target angle.
Second step target radiation source module radiates microwave signal
The target radiation source module is provided with a pitch angle and an azimuth angle to output microwave signals.
Thirdly, the servo module controls the receiving angle of the antenna
The servo module controls the position of the antenna in space to be 0 DEG in the pitching angle and the azimuth angle range (-theta, theta), and the step length k in the azimuth angle
Figure BDA0001480973960000011
And at each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed. Also, the servo module is at a pitch angle of
Figure BDA0001480973960000012
The azimuth angle is 0 degree, and the position of the antenna in space is controlled by step length k at the elevation angle
Figure BDA0001480973960000013
And at each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed.
Fourth step broadband receiving channel module processes received microwave signal
The broadband receiving channel module receives, filters and down-converts the microwave signal to obtain an intermediate frequency analog signal of the target radiation source.
The fifth step is that the signal processing module measures the incoming wave direction of the target by carrying out two-dimensional clustering on the target angle
The signal processing module digitalizes the intermediate frequency analog signal, measures the phase information of the digital signal, and performs angle measurement calculation on the phase information, wherein the position of each servo position, namely the position of an antenna is
Figure BDA0001480973960000021
Can obtain a set of incoming wave angles related to the target radiation source
Figure BDA0001480973960000022
At each servo position is
Figure BDA0001480973960000023
Can obtain a set of incoming wave angles related to the target radiation source
Figure BDA0001480973960000024
Respectively setting the servo angle to (0, theta)i) Corresponding angle of incoming wave
Figure BDA0001480973960000025
And
Figure BDA0001480973960000026
corresponding angle of incoming wave
Figure BDA0001480973960000027
Converting into angle measurement results with servo angle of (0,0) to obtain
Figure BDA0001480973960000028
Figure BDA0001480973960000029
For conversion results
Figure BDA00014809739600000210
And
Figure BDA00014809739600000211
and performing angle clustering from the azimuth dimension and the pitching dimension respectively to obtain the measurement angle of the target relative to the axis of the projectile body, namely the true direction of the incoming wave.
Thus, missile-borne airspace search based on servo dwell is completed.
The missile-borne airspace search is carried out based on servo dwell, the method carries out servo dwell measurement in the azimuth dimension and the pitching dimension, the conversion measurement angle is calculated through the two-dimensional clustering of a plurality of angles, and the problems of fuzzy angle measurement and small search airspace in the traditional airspace search method are solved.
Drawings
FIG. 1 is a schematic diagram of a position relationship between a target and a passive radar system in a missile-borne airspace search method based on servo dwell.
Detailed Description
A missile-borne airspace search method based on servo dwell comprises the following specific steps:
first step, radar direction finding system based on servo residence is constructed
A servo dwell based radar direction finding system comprising: the device comprises a target radiation source module, a servo module, a broadband receiving channel module, a signal processing module and a cable. The target radiation source module is connected with the servo module through a cable, the servo module is connected with the broadband receiving channel module through a cable, and the broadband receiving channel module is connected with the signal processing module through a cable.
The function of the target radiation source module is: radiating a microwave signal;
the servo module has the functions of: controlling the receiving angle of the antenna according to the step length and the residence time;
the function of the broadband receiving channel module is as follows: down-converting the received microwave signal into an intermediate frequency analog signal;
the signal processing module has the functions of: the intermediate frequency analog signal is digitized, the phase information of the digital signal is measured, the angle is calculated, and the target incoming wave direction is measured through two-dimensional clustering of the target angle.
Second step target radiation source module radiates microwave signal
The target radiation source module is provided with a pitch angle and an azimuth angle to output microwave signals.
Thirdly, the servo module controls the receiving angle of the antenna
The servo module controls the position of the antenna in space to be 0 DEG in the pitching angle and the azimuth angle range (-theta, theta), and the step length k in the azimuth angle
Figure BDA0001480973960000031
And at each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed. Also, the servo module is at a pitch angle of
Figure BDA0001480973960000032
The azimuth angle is 0 degree, and the position of the antenna in space is controlled by step length k at the elevation angle
Figure BDA0001480973960000033
And at each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed.
Fourth step broadband receiving channel module processes received microwave signal
The broadband receiving channel module receives, filters and down-converts the microwave signal to obtain an intermediate frequency analog signal of the target radiation source.
The fifth step is that the signal processing module measures the incoming wave direction of the target by carrying out two-dimensional clustering on the target angle
The signal processing module digitalizes the intermediate frequency analog signal, measures the phase information of the digital signal, and performs angle measurement calculation on the phase information, wherein the position of each servo position, namely the position of an antenna is
Figure BDA0001480973960000034
Can obtain a set of incoming wave angles related to the target radiation source
Figure BDA0001480973960000035
At each servo position is
Figure BDA0001480973960000036
Can obtain a set of incoming wave angles related to the target radiation source
Figure BDA0001480973960000037
Respectively setting the servo angle to (0, theta)i) Corresponding angle of incoming wave
Figure BDA0001480973960000038
And
Figure BDA0001480973960000039
corresponding angle of incoming wave
Figure BDA00014809739600000310
Converting into angle measurement results with servo angle of (0,0) to obtain
Figure BDA00014809739600000311
Figure BDA00014809739600000312
For conversion results
Figure BDA00014809739600000313
And
Figure BDA00014809739600000314
and performing angle clustering from the azimuth dimension and the pitching dimension respectively to obtain the measurement angle of the target relative to the axis of the projectile body, namely the true direction of the incoming wave.
Thus, missile-borne airspace search based on servo dwell is completed.

Claims (2)

1. A missile-borne airspace search method based on servo dwell is characterized by comprising the following specific steps:
first step, radar direction finding system based on servo residence is constructed
A servo dwell based radar direction finding system comprising: the system comprises a target radiation source module, a servo module, a broadband receiving channel module, a signal processing module and a cable; the target radiation source module is connected with the servo module through a cable, the servo module is connected with the broadband receiving channel module through a cable, and the broadband receiving channel module is connected with the signal processing module through a cable;
second step target radiation source module radiates microwave signal
The target radiation source module outputs microwave signals according to the set pitch angle and the set azimuth angle;
thirdly, the servo module controls the receiving angle of the antenna according to the step length and the residence time;
fourth step, the broadband receiving channel module processes the received microwave signal
The broadband receiving channel module receives, filters and down-converts the microwave signal to obtain an intermediate frequency analog signal of a target radiation source;
fifthly, the signal processing module digitizes the intermediate frequency analog signal, measures the phase information of the digital signal, and calculates a target angle, and the incoming wave direction of the target is measured by two-dimensional clustering of the target angle;
the signal processing module digitalizes the intermediate frequency analog signal, measures the phase information of the digital signal, and performs angle measurement calculation on the phase information, wherein the position of each servo position, namely the antenna position, is (0, theta)i),i＝1,2,3....,
Figure FDA0002965087150000011
Can obtain a set of incoming wave angles related to the target radiation source
Figure FDA0002965087150000012
At each servo position is
Figure FDA0002965087150000013
Can obtain a set of incoming wave angles related to the target radiation source
Figure FDA0002965087150000014
Respectively setting the servo angle to (0, theta)i) Corresponding angle of incoming wave
Figure FDA0002965087150000015
And
Figure FDA0002965087150000016
corresponding angle of incoming wave
Figure FDA0002965087150000017
Converting into angle measurement results when the servo angle is (0,0), and respectively obtaining
Figure FDA0002965087150000018
For conversion results
Figure FDA0002965087150000019
And
Figure FDA00029650871500000110
carrying out target angle clustering from the azimuth dimension and the pitching dimension respectively to obtain a measurement angle of a target relative to the axis of the projectile body, namely the real direction of an incoming wave;
thus, missile-borne airspace search based on servo dwell is completed.
2. The method of claim 1, wherein in the third step, the specific process of the servo module controlling the receiving angle of the antenna is as follows:
the servo module controls the position of the antenna in space to be (0, theta) within the range of the azimuth angle (-theta, theta) when the pitch angle is 0 DEG and the step length k is used in the azimuth anglei),i＝1,2,3....,
Figure FDA0002965087150000021
At each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed; also, the servo module is at a pitch angle of
Figure FDA0002965087150000022
The azimuth angle is 0 degree, and the position of the antenna in space is controlled by step length k at the elevation angle
Figure FDA0002965087150000023
And at each angle, the servo dwell time is m seconds, so that the receiving processing and angle measurement of the antenna, the broadband receiving channel module and the signal processing module on the signals are completed.
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US3842420A (en) * 1972-10-13 1974-10-15 Itt Step tracking system
WO1987003099A1 (en) * 1985-11-06 1987-05-21 Mitsubishi Denki Kabushiki Kaisha Radar apparatus
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