A device and method for controlling machine-machine scanning and phase scanning of satellite-borne radar antenna

Abstract

The present invention discloses a mechanical scanning and phase scanning control device for a satellite-borne radar antenna, comprising a mechanical scanning spiral scanning module, a phase scanning scanning module, a mechanical scanning and phase scanning control module and an antenna pointing module; the mechanical scanning spiral scanning module receives mechanical motion permission, speed setting and rapid positioning instructions sent by a communication master control at preset intervals, so that the servo mechanism moves according to the mechanical scanning angle and mechanical scanning speed specified in a mechanical scanning spiral scanning dot matrix table, and outputs a corresponding mechanical scanning spiral angle. The present invention ensures that the radar antenna realizes the synchronization of mechanical scanning and phase scanning under full-space spiral scanning in space.

Description

Technical Field

[0001] The present invention relates to the technical field of space scanning of satellite-borne radar antennas, and in particular to a device and method for controlling machine-to-machine scanning and phase scanning of satellite-borne radar antennas. Background Art

[0002] The existing satellite radar antenna scanning is divided into two types: phase scanning and mechanical scanning. The scanning combined with one-dimensional mechanical scanning and one-dimensional phase scanning has the following characteristics: 1. Adding one-dimensional mechanical scanning reduces the volume, weight, power consumption and other resources of the phased array required for two-dimensional full phase scanning; 2. Reducing the probability of failure of the phased array antenna. In the event of a phased array failure, mechanical scanning can still complete half of the work task; 3. The phase scanning speed is fast and can meet some fast scanning requirements. The mechanical scanning has high accuracy and good stability, and can achieve high-precision pointing control; 4. It is difficult to scan both mechanical and phase simultaneously, especially in spiral scanning. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for controlling the mechanical scanning and phase scanning of a satellite-borne radar antenna, so as to ensure that the radar antenna can achieve synchronization of mechanical scanning and phase scanning under spiral scanning of the entire airspace.

[0004] In order to achieve the above objectives, the present invention is implemented by the following technical solutions:

[0005] A mechanical scanning and phase scanning control device for a satellite-borne radar antenna, characterized in that it comprises a mechanical scanning spiral scanning module, a phase scanning scanning module, a mechanical scanning and phase scanning control module and an antenna pointing module;

[0006] The machine-scanning spiral scanning module receives the machine motion permission, speed setting and fast positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the machine-scanning angle and machine-scanning speed specified in the machine-scanning spiral scanning dot matrix table, and outputs the corresponding machine-scanning spiral angle;

[0007] The phase scanning module scans the scanning points specified by the phase scanning spiral dot matrix table at preset intervals, dynamically calculates the direction code required by the antenna every 1ms, and outputs the corresponding phase scanning spiral angle after comparing the angle corresponding to the direction code with the current position of the mechanical scanning;

[0008] The mechanical scanning and phase scanning control module is connected to the mechanical scanning spiral scanning module and the phase scanning scanning module, and is used to control the mechanical scanning spiral scanning module and the phase scanning scanning module;

[0009] The antenna pointing module is connected to the machine scanning and phase scanning control module and the machine scanning spiral scanning module, and is used to complete the antenna pointing according to the machine scanning angle and the phase scanning angle.

[0010] The machine-scanned spiral scanning module comprises: a machine-scanned spiral scanning dot matrix table, a servo mechanism and an angle detection module connected in sequence;

[0011] The FPGA selects a spiral dot matrix table value from the machine-scan spiral scanning dot matrix table at a preset time and sends it to the machine-scan phase scanning control module, and generates a machine-scan position designation instruction. The servo mechanism moves to the dot matrix position corresponding to the spiral dot matrix table value according to the machine-scan position designation instruction.

[0012] The angle detection module detects the actual position of the servo mechanism and sends the actual position to the antenna pointing module.

[0013] The phase scanning module comprises:

[0014] Phase-scan spiral dot matrix table, phase angle detection module, comparison module and stepping algorithm module; the stepping algorithm module subdivides the difference between the phase-scan spiral array angle obtained by searching the phase-scan spiral dot matrix table at the current moment and the current phase angle by N times as the subdivided stepping phase angle, and compares the current angle of the machine scan with the angle required for the phase scan through the comparison module every 1ms. If the angle required for the phase scan is less than the current pointing angle of the mechanism, the phase angle is shifted by a stepping phase angle. Otherwise, the 1ms period returns to the phase angle detection module for re-detection to complete a cycle, so that the position of the phase scan movement is synchronized with the position of the machine scan movement.

[0015] The machine scanning and phase scanning control module comprises: an RS422 module, a machine scanning position specifying module and a phase scanning control module; the RS422 module is used to send a machine scanning position specifying instruction and a phase scanning specifying instruction, the machine scanning position specifying module drives the servo mechanism to move according to the machine scanning position specifying instruction, and at the same time, the phase scanning control module completes the beam pointing of the antenna according to the phase scanning specifying instruction, and makes the phase scanning angle and the machine scanning angle synchronously controlled within the cycle.

[0016] The antenna pointing module comprises:

[0017] Antenna phase scanning actual position detection module and machine scanning actual position detection module;

[0018] The antenna phase scanning actual position detection module is connected to the angle detection module and is used to detect the actual position of the machine scanning;

[0019] The machine scanning actual position detection module is connected to the phase scanning control module and is used to detect the actual position of the phase scanning.

[0020] A control method using the above-mentioned satellite-borne radar antenna machine-scanning and phase-scanning control device is characterized in that the method comprises:

[0021] Receive the mechanism movement permission, speed setting and fast positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the machine scanning angle and machine scanning speed specified in the machine scanning spiral scanning dot matrix table, and outputs the corresponding machine scanning spiral angle;

[0022] Scan the scanning points specified in the phase-scan spiral dot matrix table at preset intervals, dynamically calculate the direction code required by the antenna in 1ms, and compare the angle corresponding to the direction code with the current angle of the mechanical scan, and then output the corresponding phase-scan spiral angle;

[0023] The machine-scan spiral scanning module and the phase-scan scanning module are controlled to complete the antenna pointing according to the machine-scan angle and the phase-scan angle.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] The present invention proposes a control method for combining mechanical scanning, phase scanning and spiral scanning of a satellite-borne radar antenna. The control process of mechanical scanning, phase scanning and spiral scanning is composed of four modules: a mechanical scanning spiral scanning module, a phase scanning scanning module, an RS422 mechanical scanning and phase scanning control module and an antenna pointing module, so as to realize spatial spiral scanning of the antenna. The problem that the spiral scanning angle is not synchronized due to the fast phase scanning speed and the slow mechanical scanning speed leads to unstable spiral speed and incomplete scanning space coverage is solved, and the full airspace coverage scanning of the antenna is realized. After testing, excellent results are obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a mechanical scanning and phase scanning control device of a satellite-borne radar antenna of the present invention;

[0027] Figure 2 This is a flow chart of a scanning control method of a satellite-borne radar antenna according to the present invention;

[0028] Figure 3 Scan trajectory diagram for the test antenna. DETAILED DESCRIPTION

[0029] The present invention will be further described below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0030] like Figure 1As shown, a device for controlling the mechanical scanning and phase scanning of a satellite-borne radar antenna comprises a mechanical scanning spiral scanning module 1, a phase scanning scanning module 2, a mechanical scanning and phase scanning control module 3, and an antenna pointing module 4; the mechanical scanning spiral scanning module 1 receives the mechanical motion permission, speed setting, and rapid positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the mechanical scanning angle and mechanical scanning speed specified in the mechanical scanning spiral scanning dot matrix table 101, and outputs the corresponding mechanical scanning spiral angle; the phase scanning scanning module 2 scans the phase scanning spiral dot matrix table 203 at preset intervals of 100ms. The scanning point is divided into 10 equal parts, the difference between the phase scan value and the current phase scan value is dynamically calculated every 1ms, and the angle corresponding to the movement code is compared with the current position of the mechanical scan, and the corresponding phase scan spiral angle is output; the mechanical scanning and phase scanning control module is connected to the mechanical scanning spiral scanning module and the phase scanning scanning module, and is used to control the mechanical scanning spiral scanning module and the phase scanning scanning module; the antenna pointing module 4 is connected to the mechanical scanning and phase scanning control module 3 and the mechanical scanning spiral scanning module 1, and is used to complete the antenna pointing according to the machine scanning angle and the phase scanning angle.

[0031] Specifically, a spiral value is searched every 100ms, including the mechanical scanning phase scanning point. The mechanical movement is slow, and it moves to the mechanical scanning point at a constant speed. The phase scanning movement is fast, and the difference between the phase scanning value and the current phase scanning value is divided into 10 equal parts. The phase scanning loops 100 times within 100ms, and each time the value to be pointed to by the phase scanning at the next moment is detected and compared with the current value of the mechanism. If it is less than, it means that the mechanical is ahead of the phase scanning, and the phase scanning is pointed to the next moment value. If it is greater than, it means that the phase scanning is ahead of the mechanical scanning, and the mechanical scanning remains unchanged. Because there are 10 equal parts, the phase scanning and the mechanical scanning differ by at most one phase scanning subdivision step value to maintain synchronization. In 100 cycles, 90 times keep the original value, and 10 times accumulate the step value. In this way, the phase scanning clock can be kept moving with the pace of the mechanical scanning.

[0032] The machine-scanned spiral scanning module 1 includes: a machine-scanned spiral scanning dot matrix table 101, a servo mechanism 103 and an angle detection module 104 connected in sequence; a timer 102 is also connected between the servo mechanism 103 and the machine-scanned spiral scanning dot matrix table 101, and the FPGA selects a spiral dot matrix table value from the machine-scanned spiral scanning dot matrix table at preset time intervals and sends it to the machine-scanned phase scanning control module, and generates a machine-scanned position specifying instruction, and the servo mechanism moves to the dot matrix position corresponding to the spiral dot matrix table value according to the machine-scanned position specifying instruction; the angle detection module detects the actual position of the servo mechanism and sends the actual position to the antenna pointing module.

[0033] The phase scan module includes: a phase scan spiral dot matrix table, a phase angle detection module, a comparison module and a step algorithm module; the step algorithm module subdivides the difference between the phase scan spiral array position detected at the current moment and the current phase angle by 10N times as a subdivided step phase angle, and compares the current angle of the machine scan and the angle required for the phase scan (that is, the sum of the current phase angle and the current subdivided step phase angle) through the comparison module every 1ms. If the angle required for the phase scan is less than the current mechanism pointing angle, the phase angle shifts by a step phase angle. Otherwise, the 1ms period returns to the phase angle detection module for re-detection to complete a cycle, so that the position of the phase scan movement and the position of the machine scan movement are synchronized.

[0034] The machine scanning and phase scanning control module includes: an RS422 module 301, a machine scanning position specifying module 302 and a phase scanning control module 303; the RS422 module 301 is used to send a machine scanning position specifying instruction and a phase scanning specifying instruction, the machine scanning position specifying module drives the servo mechanism to move according to the machine scanning position specifying instruction, and at the same time, the phase scanning control module drives the servo mechanism to move according to the phase scanning specifying instruction, and makes the phase scanning angle and the machine scanning angle synchronously controlled within the cycle.

[0035] The antenna pointing module 4 includes: an antenna phase scan actual position detection module 401 and a machine scan actual position detection module 402; the antenna phase scan actual position detection module 401 is connected to the angle detection module for detecting the actual position of the machine scan; the machine scan actual position detection module 402 is connected to the phase scan control module for detecting the actual position of the phase scan.

[0036] like Figure 2 , 3 As shown, a control method using the above-mentioned satellite-borne radar antenna machine-scanning and phase-scanning control device comprises:

[0037] Receive the mechanism movement permission, speed setting and fast positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the machine scanning angle and machine scanning speed specified in the machine scanning spiral scanning dot matrix table, and outputs the corresponding machine scanning spiral angle;

[0038] Scan the scanning points specified in the phase scanning spiral dot matrix table every 100ms, divide the scanning points into 10 equal parts, dynamically calculate the direction code required by the antenna every 1ms, and compare the angle corresponding to the direction code with the current position of the mechanical scan, and output the corresponding phase scanning spiral angle;

[0039] The mechanical scanning spiral scanning module and the phase scanning scanning module are controlled to complete the antenna pointing according to the mechanical scanning angle and the phase scanning angle.

[0040] Specifically, A1: After the system is powered on, the communication master controller receives the spiral scanning command sent by the intersatellite router through RS422, and after decoding, sends it to the machine scanning mechanism control board and the phase scanning wave control machine at the same time;

[0041] A2: The mechanism control board sends a mechanism power-on command and a mechanism movement permission command. If the mechanism has been powered on and moved, it is allowed to execute step A3. Otherwise, it executes step A8 and the scan ends.

[0042] A3: The 100ms fixed timer starts, and "1" is added every 100ms. At the same time, the phase scanning module searches the spiral dot matrix table for the phase scanning spiral dot matrix value pointed to in the cycle, and the machine scanning spiral scanning module searches the spiral dot matrix table for the machine scanning spiral dot matrix value pointed to in the cycle, calculates the angular velocity required by the mechanism, and sends it to the servo mechanism;

[0043] A4: When the calculated angular velocity or absolute value of the mechanism is greater than the maximum velocity of the mechanism, the maximum velocity of the mechanism is sent to the mechanism, otherwise the calculated velocity value is sent to the mechanism;

[0044] A5: The machine scanning module receives the setting mechanism specified instruction from the communication master control, decodes it through RS422, and drives the motor to drive the mechanism to move according to a certain control algorithm, so that the mechanism points to the spiral machine scanning angle corresponding to the spiral scanning dot matrix table.

[0045] A6: The phase scanning module receives the spiral scanning beam pointing command sent by the communication master control, searches for the phase angle of the spiral scanning, and subdivides the difference between the angle and the current phase angle into 10 equal steps, and calculates the phase angle required for the phase scanning (i.e., the sum of the current phase angle and the current subdivided step phase angle). According to the beam control algorithm, the shift code corresponding to the phase angle is calculated. When the phase angle corresponding to the shift code is greater than the current angle of the machine scanning mechanism, the shift code at the previous moment is maintained. Otherwise, the subdivided step phase angle is added by "1", and the phase angle required for the phase scanning is calculated to complete a control cycle. If the cycle exceeds 100 times, enter step A7, otherwise repeat step A6.

[0046] A7: The antenna completes a spiral scan point in the spiral scan table under the action of steps A5 and A6. The system travels through all the spiral scan table points, repeating steps A3 to A6 until all the spiral points are completed, and then enters step A8.

[0047] A8: The spiral scan is finished and the system is waiting for the next spiral scan command.

[0048] In summary, the present invention provides a device and method for controlling mechanical scanning and phase scanning of a satellite-borne radar antenna, which ensures that the radar antenna achieves synchronization of mechanical scanning and phase scanning under spiral scanning of the entire airspace.

[0049] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A device for controlling the mechanical and phase scanning of a satellite-borne radar antenna. It is characterized in that It includes a machine-scan spiral scanning module, a phase-scan scanning module, a machine-scan phase-scan control module and an antenna pointing module; The machine-scanning spiral scanning module receives the machine motion permission, speed setting and fast positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the machine-scanning angle and machine-scanning speed specified in the machine-scanning spiral scanning dot matrix table, and outputs the corresponding machine-scanning spiral angle; The phase scanning module scans the scanning points specified by the phase scanning spiral dot matrix table at preset intervals, dynamically calculates the direction code required by the antenna every 1ms, and outputs the corresponding phase scanning spiral angle after comparing the angle corresponding to the direction code with the current position of the mechanical scanning; The mechanical scanning and phase scanning control module is connected to the mechanical scanning spiral scanning module and the phase scanning scanning module, and is used to control the mechanical scanning spiral scanning module and the phase scanning scanning module; The antenna pointing module is connected to the machine scanning phase scanning control module and the machine scanning spiral scanning module, and is used to complete the antenna pointing according to the machine scanning angle and the phase scanning angle; The machine-scanned spiral scanning module comprises: a machine-scanned spiral scanning dot matrix table, a servo mechanism and an angle detection module connected in sequence; The FPGA selects a spiral dot matrix table value from the machine-scan spiral scanning dot matrix table at a preset time and sends it to the machine-scan phase scanning control module, and generates a machine-scan position designation instruction. The servo mechanism moves to the dot matrix position corresponding to the spiral dot matrix table value according to the machine-scan position designation instruction. The angle detection module detects the actual position of the servo mechanism and sends the actual position to the antenna pointing module; The phase scanning module comprises: Phase-scan spiral dot matrix table, phase angle detection module, comparison module and stepping algorithm module; the stepping algorithm module subdivides the difference between the phase-scan spiral array angle obtained by searching the phase-scan spiral dot matrix table at the current moment and the current phase angle by N times as the subdivided stepping phase angle, and compares the current angle of the machine scan with the angle required for the phase scan through the comparison module every 1ms. If the angle required for the phase scan is less than the current pointing angle of the mechanism, the phase angle is shifted by a stepping phase angle. Otherwise, the 1ms period returns to the phase angle detection module for re-detection to complete a cycle, so that the position of the phase scan movement is synchronized with the position of the machine scan movement.

2. The device for controlling the mechanical and phase scanning of a satellite-borne radar antenna as claimed in claim 1, It is characterized in that The machine scanning and phase scanning control module comprises: an RS422 module, a machine scanning position specifying module and a phase scanning control module; the RS422 module is used to send a machine scanning position specifying instruction and a phase scanning specifying instruction, the machine scanning position specifying module drives the servo mechanism to move according to the machine scanning position specifying instruction, and at the same time, the phase scanning control module completes the beam pointing of the antenna according to the phase scanning specifying instruction, and makes the phase scanning angle and the machine scanning angle synchronously controlled within the cycle.

3. The device for controlling the mechanical and phase scanning of a satellite-borne radar antenna as claimed in claim 1, It is characterized in that The antenna pointing module comprises: Antenna phase scanning actual position detection module and machine scanning actual position detection module; The antenna phase scanning actual position detection module is connected to the angle detection module and is used to detect the actual position of the machine scanning; The machine scanning actual position detection module is connected to the phase scanning control module and is used to detect the actual position of the phase scanning.

4. A control method using the mechanical scanning and phase scanning control device of a spaceborne radar antenna as claimed in any one of claims 1 to 3, It is characterized in that The method includes: Receive the mechanism movement permission, speed setting and fast positioning instructions sent by the communication master control at preset intervals, so that the servo mechanism moves according to the machine scanning angle and machine scanning speed specified in the machine scanning spiral scanning dot matrix table, and outputs the corresponding machine scanning spiral angle; Scan the scanning points specified in the phase-scan spiral dot matrix table at preset intervals, dynamically calculate the direction code required by the antenna in 1ms, and compare the angle corresponding to the direction code with the current angle of the mechanical scan, and then output the corresponding phase-scan spiral angle; The machine-scan spiral scanning module and the phase-scan scanning module are controlled to complete the antenna pointing according to the machine-scan angle and the phase-scan angle.

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