A control method for densely arranged antenna array

Abstract

The present invention discloses a control method for a densely arranged antenna array, which belongs to the field of electronic information. It provides a new solution to the problems of deck angle deviation and interference of the antenna array that are easily generated when the traditional antenna array control method is used for target tracking. When the deck angle deviation of the antenna array is large, the adjustment method is determined according to the current angle state: if the current pitch deck angle is high and moves toward the low elevation angle, the angle of the azimuth isoaxis is adjusted first, and then the pitch axis is adjusted after it is in place; if the target pitch deck angle is high and the antenna array moves upward from the low elevation angle, the pitch deck angle is adjusted first, and then the angle of the azimuth isoaxis is adjusted after it is high enough; otherwise, each axis of the antenna moves toward the average deck angle of the axis, and moves toward the target after the deviation is small enough. The present invention is applicable to antennas of different vehicle types, effectively improving the stability and reliability of dense antenna array controllers and avoiding interference problems between antennas.

Description

Technical Field

[0001] The present invention relates to the field of electronic information, and is used in a densely arranged multi-antenna array system. A densely arranged antenna array control method is designed. Background Art

[0002] In a multi-antenna array system, multiple antennas are linked to point to the same target. This design can greatly increase the equivalent reflection area, and achieve the performance characteristics of a large single antenna with a small antenna array. The densely arranged multi-antenna array system occupies a small area and has a compact structure. It can be arranged on carriers such as pods and roofs, and can be transported by various modes of transportation such as roads, railways, and ships. It has the characteristics of large equivalent reflection area, high equivalent gain, motorized deployment, and flexible use, and has broad application prospects. Limited by conditions such as transportation size, the antenna gap in the densely arranged multi-antenna array is small and the space for free movement is small. If the adjacent antennas are not pointed in the same direction, interference is likely to occur. Therefore, care should be taken to avoid large deck angle deviations between antennas during control.

[0003] When a multi-antenna array system is tracking a target, it calculates the geographic pointing angle of each antenna based on the target coordinates and the coordinates of each antenna, and then converts the geographic pointing angle into the deck angle in combination with the attitude angle of each antenna. In this process, the deck angle deviation is likely to occur. The reasons include:

[0004] 1) The roll and pitch attitudes and coordinates of each antenna in the system are different, so there is a certain deck angle deviation between the antennas during the tracking process. If the target is close to the system, the deviation will become larger, and interference problems may occur.

[0005] 2) When the system is controlled, due to different antenna drive shaft structures, different drive torques, different loads or controller errors, the angular velocity of a certain axis between the array antennas differs greatly, resulting in a large angle deviation and causing interference problems;

[0006] 3) During the linkage tracking control process, when the tracking target approaches the top of the antenna or there is an over-the-top problem, the antenna has a high pitch angle. After attitude conversion, the azimuth deck angle is greatly affected by the attitude. It is easy to have a large deviation on the azimuth axis due to the different attitude angles of the array antennas. When moving from a low elevation angle to a high elevation angle, or from a high elevation angle to a low elevation angle on a cross-axis, polarization axis or XY vehicle-type antenna, angle deviation problems are also likely to occur.

[0007] Traditional multi-antenna array control methods do not provide a good solution to the above phenomenon. If there is a large angle deviation between the antennas, interference may occur, affecting the reception and transmission of signals, etc. Summary of the invention

[0008] The purpose of the present invention is to design a new control method for the problem of large angle differences between antennas that are prone to occur during the linkage tracking control of traditional multi-antenna array systems. The characteristics are: the antenna array can automatically correct when a large angle deviation occurs during the tracking process; when a large deviation problem caused by a high elevation angle occurs, it can preferentially rotate one axis with unrestricted freedom, adjust it to a suitable position, and then rotate the other axis. This method avoids the problem of interference between array antennas to the greatest extent, and in addition to azimuth and pitch vehicle antennas, this method is also applicable to other types of vehicles, such as XY axis vehicle antennas or the polarization axis and cross axis of the antenna.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A method for controlling a densely arranged antenna array comprises the following steps:

[0011] Step 1, before the antenna moves, set its free rotation angle θ and the maximum tolerance angle Δ for deviation;

[0012] Step 2, the controller monitors the angles of each axis of the antenna and the target angle in real time, and calculates the average angle of the antenna axis and the average target angle; if the pitch deck angle of a certain antenna is less than or equal to the free rotation angle θ+0.1, proceed to step 3;

[0013] Step 3, determine whether the absolute value of the difference between the angle of each axis of a certain antenna in the antenna array and the average value of the axis is greater than or equal to Δ / 2-0.1. If satisfied, proceed to step 4; if not satisfied, the antenna continues to move normally;

[0014] Step 4, determine whether the absolute value of the difference between the target angle of each axis of the antenna array and the average target angle is less than Δ / 2-0.1; if satisfied, proceed to step 5; if not satisfied, proceed to step 9;

[0015] Step 5, determining whether the pitch deck angles of the antenna array are all greater than θ; if satisfied, proceed to step 6; if not satisfied, proceed to step 7;

[0016] Step 6: First adjust the azimuth and polarization axis angles. After the rotation is in place and the deviation is less than Δ / 2-0.1, adjust the pitch to reach the target position, and the antenna continues to move normally.

[0017] Step 7: Is the difference between the axis angle of the antenna array and the average value less than Δ / 2? If so, proceed to step 8; if not, stop the antenna rotation;

[0018] Step 8, the target deck angle of each axis of the antenna array is set to the current average deck angle, and the antenna continues to move normally;

[0019] Step 9, determine whether the target pitch angle of the antenna array is greater than the free rotation angle θ. If it is satisfied, the pitch axis is rotated first, and then the azimuth axis and polarization axis are rotated to the target position after they are in place, and the antenna continues to move normally; if it is not satisfied, the antenna rotation is stopped.

[0020] Furthermore, the maximum tolerable angle Δ of the deviation is defined as: when the axial angle deviation between any two antennas in the antenna array exceeds Δ, it is considered that the antenna array system loses synchronization and there is a risk of interference.

[0021] Furthermore, the free rotation angle θ is defined as: when the deck angle of the antenna elevation axis is greater than θ, the azimuth axis and the polarization axis can rotate freely without interference.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1) According to the angle deviation caused by different reasons, the movement trajectory of the antenna array is planned to avoid the interference problem between antennas to the greatest extent, and the antenna array system is applicable to different types of vehicles;

[0024] 2) Calculating the deviation between antenna arrays by averaging can reduce the amount of calculation and improve system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of the densely arranged multi-antenna array control method of the present invention.

[0026] Figure 2 It is a schematic diagram of dense arrangement of multiple antenna arrays of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figure 2 It is a densely arranged multi-antenna array.

[0029] Reference Figure 1 The control method adopted is as follows:

[0030] Step 1), combined with the system structure design requirements, set the maximum tolerance angle Δ for deviation. When the axis angle deviation between any two antennas in the array exceeds Δ, it can be considered that the array system has lost synchronization and there is a risk of interference. Set the free rotation angle θ. When the deck angle of all antenna pitch axes is greater than θ, the remaining axes can rotate freely without interference.

[0031] Step 2), during the movement, the controller monitors the angles of each axis of the antenna array and the target angle in real time, and calculates the average angle of the antenna axis and the average target angle. If the pitch deck angle of each antenna is greater than the free rotation angle θ+0.1 at this time, there is no risk of interference problem, and the system is not restricted in movement. Otherwise, continue to judge;

[0032] Step 3), determine whether the absolute value of the difference between the angle of each axis of the antenna array and the average value of the axis (the average value of the azimuth axis and the azimuth axis, the average value of the pitch axis and the pitch axis, and the average value of the polarization axis) is less than Δ / 2-0.1. If it is satisfied, it is considered that the antenna rotates synchronously at this time and no additional processing is required. Otherwise, it is considered that the antenna array system has lost synchronization, and continue to judge:

[0033] Step 4) Determine whether the absolute value of the difference between the target angle of each axis of the antenna array and the average target angle is less than Δ / 2-0.1. If it is satisfied, determine whether the pitch deck angle of the antenna array is greater than θ at this time. If it is satisfied, adjust the azimuth, polarization and other axis angles first, and adjust the pitch to reach the target position after the remaining axes are rotated in place and the deviation is less than Δ / 2-0.1. If it is not satisfied, continue to determine whether the difference between the axis angles of the antenna array and the average value is less than Δ / 2. If it is satisfied, adjust the average value: set the target angle of each axis of the antenna to the average value of the current axis angle, and continue to move to the next target after it is transferred to the average value, so as to eliminate the angle deviation problem; if it is not satisfied, it is considered that too much deviation has occurred between the antenna arrays, and there is a risk of interference, so the movement is stopped.

[0034] Step 5), if the condition that the absolute value of the difference between the antenna target angle and the target average angle is less than Δ / 2 is not met, determine whether the target pitch angle of the antenna array is greater than the free rotation angle θ. If it is met, the pitch axis is rotated first, and then the other axes are rotated to the target position after they are in place. If it is not met, stop the antenna rotation.

[0035] In step 4) and step 5) of this embodiment, two situations are distinguished, namely: when moving from a pitch low deck angle state to a high deck angle state, first adjust the pitch deck angle, and then adjust the remaining axes after it is high enough; and when moving from a pitch high deck angle state to a low deck angle state, first adjust the deck angle of the azimuth isoaxis, and then adjust the pitch axis when it is in place and the antenna array deck angle deviation is small.

[0036] In step 4) of this embodiment, when the pitch deck angle of the antenna array is low but a large deviation occurs, the state uses the average deck angle as the adjustment value to adjust the antenna array, and then proceeds to the next step after the adjustment is in place.

[0037] In this embodiment, the value 0.1 is a parameter that can be set according to different systems. It is set based on experience. 0.1 has little effect on the motion range of the system and also has a good guarantee for safety.

Claims

1. A densely arranged antenna array control method, characterized in that: The specific steps are as follows: Step 1, before the antenna moves, set its free rotation angle θ and the maximum tolerance angle Δ for deviation; Step 2, the controller monitors the angles of each axis of the antenna and the target angle in real time, and calculates the average angle of the antenna axis and the average target angle; if the pitch deck angle of a certain antenna is less than or equal to the free rotation angle θ+0.1, proceed to step 3; Step 3, determine whether the absolute value of the difference between the angle of each axis of a certain antenna in the antenna array and the average value of the axis is greater than or equal to Δ / 2-0.

1. If satisfied, proceed to step 4; if not satisfied, the antenna continues to move normally; Step 4, determine whether the absolute value of the difference between the target angle of each axis of the antenna array and the average target angle is less than Δ / 2-0.1; if satisfied, proceed to step 5; if not satisfied, proceed to step 9; Step 5, determining whether the pitch deck angles of the antenna array are all greater than θ; if satisfied, proceed to step 6; if not satisfied, proceed to step 7; Step 6: First adjust the azimuth and polarization axis angles. After the rotation is in place and the deviation is less than Δ / 2-0.1, adjust the pitch to reach the target position, and the antenna continues to move normally. Step 7: Is the difference between the axis angle of the antenna array and the average value less than Δ / 2? If so, proceed to step 8; if not, stop the antenna rotation; Step 8, the target deck angle of each axis of the antenna array is set to the current average deck angle, and the antenna continues to move normally; Step 9, determine whether the target pitch angle of the antenna array is greater than the free rotation angle θ. If it is satisfied, the pitch axis is rotated first, and then the azimuth axis and polarization axis are rotated to the target position after they are in place, and the antenna continues to move normally; if it is not satisfied, the antenna rotation is stopped.

2. A densely arranged antenna array control method according to claim 1, characterized in that: The maximum tolerance angle Δ of the deviation is defined as: when the axial angle deviation between any two antennas in the antenna array exceeds Δ, it is considered that the antenna array system loses synchronization and there is a risk of interference.

3. The method for controlling a densely arranged antenna array according to claim 1, characterized in that: The free rotation angle θ is defined as: when the deck angle of the antenna elevation axis is greater than θ, the azimuth axis and the polarization axis can rotate freely without interference.

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