Airborne two-dimensional active phased array weather radar beam scanning and processing method

Abstract

The application provides a method for scanning and processing a two-dimensional active phased array weather radar on an airplane, which comprises the following steps: S1: obtaining aviation information, an elevation control mode and a working mode; S2: judging whether to enter a wind shear state; S3: performing antenna scanning; S4: processing the antenna scanning result in S3; and S5: updating a main pilot image and a co-pilot image in real time through the processed result, wherein the transformation of the main co-pilot elevation or the up-down beam elevation is alternately performed in the antenna scanning process in a frame cycle. The method supports a multi-source human-machine interaction control method of the airborne weather radar, which alternately processes the main pilot information and the co-pilot information in a frame interval in the scanning process under the condition that the main pilot and the co-pilot are in different working modes and elevations. The method can be used for the two-dimensional active phased array weather radar on the airplane, improves the acquisition ability of the pilot to the weather information, and reduces the accident rate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of airborne weather radar, and particularly relates to an airborne two-dimensional active phased array weather radar beam scanning and processing method. BACKGROUND

[0002] Phased array antennas have high flexibility, fast scanning speed, and multiple beams, and have been widely applied to airborne early warning radars and fire control radars. The new generation of airborne weather radars will also generally introduce phased array systems. Unlike traditional mechanical scanning antennas, phased array antennas direct the antenna beam to a specified direction by phase shifting all array elements. For airborne weather radars, this electronic scanning method can realize the jumping of the radar azimuth and elevation angles and improve the scanning speed.

[0003] The weather radar carried by a large passenger aircraft usually has multiple working modes such as weather, turbulence, and wind shear, and needs two pilots, i.e., a main pilot and a co-pilot. Although there is a distinction between the main pilot and the co-pilot in the previous human-machine interaction control mode of the weather radar, the main pilot and the co-pilot need to keep consistent on the control information such as the working mode of the radar, and only differ in the display range of the screen. Under this control mode, the two pilots can only obtain weather information in one working mode from the weather radar, and cannot fully exert the advantages of multi-pilot driving.

[0004] Therefore, it is necessary to provide a weather radar beam scanning and processing method capable of improving the scanning speed. SUMMARY

[0005] The present application proposes an airborne two-dimensional active phased array weather radar beam scanning and processing method capable of improving the scanning speed in view of the problems existing in the prior art.

[0006] The present application aims to provide an airborne two-dimensional active phased array weather radar beam scanning and processing method, which comprises the following steps:

[0007] S1: obtaining avionics information, an elevation angle control mode, and a working mode;

[0008] S2: judging whether to enter a wind shear state according to the avionics information obtained in S1;

[0009] S3: performing antenna scanning according to the elevation angle control mode in S1;

[0010] S4: processing the antenna scanning result in S3 according to the elevation angle control mode and the working mode in S1;

[0011] S5: updating a main pilot image and a co-pilot image in real time through the result processed in S4,

[0012] In the antenna scanning process, the main driver elevation angle or the upper and lower beam elevation angle is transformed alternately in a frame cycle.

[0013] The airborne two-dimensional active phased array weather radar beam scanning and processing method also has the characteristics that the elevation angle control mode includes an automatic elevation angle control mode and a manual elevation angle control mode; and the working mode includes a weather mode, a terrain mode and a turbulence mode.

[0014] The airborne two-dimensional active phased array weather radar beam scanning and processing method also has the characteristics that in the S3, in the manual elevation angle control mode and when the wind shear state is not entered, in the antenna scanning process, the radar azimuth angle θ n+1 is

[0015]

[0016] wherein n is a current frame number, Δθ WX is a weather radar azimuth resolution, [-θ max , θ max ] is a radar azimuth angle scanning range,

[0017] the radar elevation angle is

[0018]

[0019] wherein, is a main driver elevation angle, is a co-driver elevation angle.

[0020] The airborne two-dimensional active phased array weather radar beam scanning and processing method also has the characteristics that in the S3, in the manual elevation angle control mode and when the wind shear state is entered, when the azimuth angle is outside [-θ WS , θ WS ], the antenna scanning mode is the same as that when the wind shear state is not entered in the manual elevation angle control mode, wherein 40° < θ WS < θ max .

[0021] The airborne two-dimensional active phased array weather radar beam scanning and processing method also has the characteristics that in the S3, in the manual elevation angle control mode and when the wind shear state is entered, when the azimuth angle is within [-θ WS , θ WS ], the radar azimuth angle θ n+1 is

[0022]

[0023] Wherein, 40°<θ WS <θ max , n is the current frame number, Δθ WX is the azimuth resolution of the weather radar, [-θ max , θ max ] is the azimuth angle scanning range of the radar, is the current radar elevation angle, is the wind shear elevation angle,

[0024] the radar elevation angle of the next frame is

[0025]

[0026] Wherein, is the main driver elevation angle, is the co-driver elevation angle.

[0027] The airborne two-dimensional active phased array weather radar beam scanning and processing method provided by the application also has the following characteristics: in the automatic elevation control mode and when not entering the wind shear state, in the antenna scanning process, the radar azimuth angle θ n+1 of the next frame

[0028]

[0029] Wherein, n is the current frame number, Δθ WX is the azimuth resolution of the weather radar, [-θ max , θ max ] is the azimuth angle scanning range of the radar, is the current radar elevation angle, is the upper beam elevation angle, is the lower beam elevation angle,

[0030] the radar elevation angle of the next frame is

[0031]

[0032] The airborne two-dimensional active phased array weather radar beam scanning and processing method provided by the application also has the following characteristics: in the automatic elevation control mode and when entering the wind shear state, when the azimuth angle is outside [-θ WS , θ WS ], the antenna scanning mode is the same as that in the automatic elevation control mode and when not entering the wind shear state, wherein, 40°<θ WS <θ max .

[0033] The method also has the following characteristics: in S3, when the elevation angle is in the automatic control mode and enters the wind shear state, the radar azimuth angle θ of the next frame is θ when the azimuth angle is within [-θ, θ]. WS ,θ WS ] and the next frame is θ n+1 .

[0034]

[0035] wherein 40°<θ WS <θ max , n is the current frame number, Δθ WX is the azimuth resolution of the weather radar, [-θ max , θ max ] is the scanning range of the radar azimuth angle, is the current radar elevation angle, is the lower-beam elevation angle,

[0036] the radar elevation angle of the next frame is .

[0037]

[0038] wherein, is the wind shear elevation angle, is the upper-beam elevation angle.

[0039] The method also has the following characteristics: in S4, if the elevation angle mode is the manual control mode, the echo data in the antenna scanning result obtained by S3 is processed in a single row.

[0040] The method also has the following characteristics: in S4, if the elevation angle is in the automatic mode and the working mode is the turbulence mode, only the echo data in the antenna scanning result obtained by S3 at the upper-beam elevation angle is processed; if the elevation angle is in the automatic mode and the working mode is the terrain mode, only the echo data in the antenna scanning result obtained by S3 at the lower-beam elevation angle is processed; if the elevation angle is in the automatic mode and the working mode is the weather mode, the echo data in the antenna scanning result obtained by S3 at the upper-beam and lower-beam elevation angles is processed in multiple scans.

[0041] The method also has the following characteristics: in S4, when the wind shear state is entered and the elevation angle is the wind shear elevation angle, the wind shear target detection and alarm are performed.

[0042] Compared with the prior art, the method has the following advantages:

[0043] The airborne two-dimensional active phased array weather radar beam scanning and processing method provided by the present application supports the main pilot and the copilot to alternately process the main pilot information and the copilot information of the airborne weather radar in the scanning process at intervals of frames in different working modes and elevation angles, and the method can be used for the airborne two-dimensional active phased array weather radar, improves the acquisition ability of the pilot to the weather information, and reduces the accident rate. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0045] Figure 1 The block diagram of the airborne two-dimensional active phased array weather radar beam scanning and processing method provided by the embodiment of the present application is shown in the figure.

[0046] Figure 2 The antenna scanning schematic diagram in the processing method provided by the embodiment of the present application when the elevation angle is manual and the wind shear mode is not entered is shown in the figure.

[0047] Figure 3 The antenna scanning schematic diagram in the processing method provided by the embodiment of the present application when the elevation angle is manual and the wind shear mode is entered is shown in the figure.

[0048] Figure 4 The antenna scanning schematic diagram in the processing method provided by the embodiment of the present application when the elevation angle is automatic and the wind shear mode is not entered is shown in the figure.

[0049] Figure 5 The antenna scanning schematic diagram in the processing method provided by the embodiment of the present application when the elevation angle is automatic and the wind shear mode is entered is shown in the figure. DETAILED DESCRIPTION

[0050] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the scanning and processing method provided by the present application is specifically described in the following embodiments in combination with the drawings.

[0051] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0052] In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0053] The terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0054] As shown in Figure 1 An airborne two-dimensional active phased array weather radar beam scanning and processing method is provided, the method comprising the following steps:

[0055] S1: obtaining avionics information, elevation control mode and working mode;

[0056] S2: determining whether to enter a wind shear state according to the avionics information obtained in S1;

[0057] S3: performing antenna scanning according to the elevation control mode of S1;

[0058] S4: processing the antenna scanning result in S3 according to the elevation control mode and working mode of S1;

[0059] S5: updating the main pilot image and the co-pilot image in real time through the result of S4 processing,

[0060] In the antenna scanning process, the main and co-pilot elevation angles or the up and down beam elevation angles are alternately transformed in cycles.

[0061] In some embodiments, the elevation angle control mode includes an automatic elevation angle control mode and a manual elevation angle control mode; the operating mode includes a weather mode, a terrain mode, and a turbulence mode.

[0062] In some embodiments, in step S3, when the elevation angle is in manual control mode and wind shear is not engaged, such as... Figure 2 As shown, during antenna scanning, the radar azimuth angle range is [-θ]. max ,θ max ], azimuth angle from -θ max Begin scanning from left to right, pausing for one frame at each beam position before moving to the next. The azimuth angle shifts to the right by Δθ in each frame. WX / 2, Δθ WX This represents the azimuth resolution of the weather radar. When the azimuth angle is scanned to θ... max Then return -θ max The radar pitch angle alternates between the pilot's and co-pilot's pitch angles on a frame-by-frame basis. During the scan, signal processing is performed based on the current pitch angle, and the corresponding pilot's image is updated.

[0063] Specifically, the radar azimuth angle θ of the next frame n+1 for

[0064]

[0065] Where, n is the current frame number, and Δθ WX For the azimuth resolution of the weather radar, [-θ max ,θ max [This refers to the radar azimuth scanning range.]

[0066] Radar elevation angle in the next frame for

[0067]

[0068] in Driver's pitch angle, The angle of attack for the passenger.

[0069] In some embodiments, in step S3, when in manual elevation control mode and entering wind shear state, such as Figure 3 As shown, azimuth - max Begin scanning from left to right, when the azimuth angle is within [-θ] WS ,θ WS Outside of this point, the antenna scanning method is the same as in the manual elevation control mode and when wind shear is not present, where 40° < θ WS <θ max .

[0070] In some embodiments, in step S3, when in manual elevation control mode and entering wind shear state, such as Figure 3 As shown, azimuth angle -θ max Begin scanning from left to right, when the azimuth angle is within [-θ] WS ,θ WS When the current frame is within the wind shear elevation angle, the azimuth angle in the next frame will shift to the right by Δθ. WX / 2, the radar pitch angle is calculated by inserting a wind shear pitch angle between the pilot's and co-pilot's pitch angles. During the scan, signal processing is performed based on the current pitch angle, and the corresponding pilot's image is updated. When the beam is at the wind shear pitch angle, wind shear warning information is updated on both the pilot's and co-pilot's images.

[0071] Specifically, the radar azimuth angle θ of the next frame n+1 for

[0072]

[0073] Among them, 40° < θ WS <θ max n is the current frame number, Δθ WX For the azimuth resolution of the weather radar, [-θ max ,θ max [This refers to the radar azimuth scanning range.] This is the current radar elevation angle. For wind shear elevation angle,

[0074] Radar elevation angle in the next frame for

[0075]

[0076] in, Driver's pitch angle, The angle of attack for the passenger.

[0077] In some embodiments, when in automatic elevation control mode and not in wind shear state, such as Figure 4 As shown, during antenna scanning, the azimuth angle -θ max Begin scanning from left to right. When the current frame is at the lower beam elevation angle, the azimuth angle in the next frame will shift to the right by Δθ. WX The radar elevation angle alternates between the upper and lower beam elevation angles on a frame-by-frame basis. During the scan, the upper and lower beams are used for ground clutter suppression at each azimuth angle, and the pilot's image is updated.

[0078] Specifically, the radar azimuth angle θ of the next frame n+1 for

[0079]

[0080] Where n is the current frame number, Δθ WX For the azimuth resolution of the weather radar, [-θ max ,θ max [This refers to the radar azimuth scanning range.] This is the current radar elevation angle. The upper beam elevation angle, The lower beam elevation angle,

[0081] Radar elevation angle in the next frame for

[0082]

[0083] In some embodiments, when in automatic elevation control mode and entering wind shear state, such as Figure 5 As shown, azimuth angle -θ max Begin scanning from left to right, when the azimuth angle is within [-θ] WS ,θ WS Outside of this point, the antenna scanning method is the same as in automatic elevation control mode and when wind shear is not present, where 40° < θ WS <θ max .

[0084] In some embodiments, in step S3, when in automatic elevation control mode and entering wind shear state, such as Figure 5 As shown, azimuth angle -θ max Begin scanning from left to right, when the azimuth angle is within [-θ] WS ,θ WS When the current frame is within the lower beam elevation angle, the azimuth angle of the next frame will shift to the right by Δθ. WX The radar elevation angle alternates frame-by-frame in the order of wind shear elevation angle, upper beam elevation angle, and lower beam elevation angle. During scanning, ground clutter is suppressed using both upper and lower beams at each azimuth angle, and the pilot's image is updated. When the beam is at the wind shear elevation angle, wind shear warning information for the pilot and co-pilot is updated.

[0085] Specifically, the radar azimuth angle θ of the next frame n+1 for

[0086]

[0087] Among them, 40° < θ WS <θ max n is the current frame number, Δθ WX For the azimuth resolution of the weather radar, [-θ max ,θ max [This refers to the radar azimuth scanning range.] current radar elevation angle, lower beam elevation angle,

[0088] radar elevation angle of next frame is

[0089]

[0090] wherein, wind shear elevation angle, upper beam elevation angle.

[0091] In some embodiments, in the S4, if the elevation angle mode is a manual control mode, the echo data in the antenna scanning result obtained by the S3 is processed in a single row.

[0092] In some embodiments, in the S4, if the elevation angle is an automatic mode and the working mode is a turbulent flow mode, only the echo data in the antenna scanning result obtained by the S3 at the upper beam elevation angle is processed; if the elevation angle is an automatic mode and the working mode is a terrain mode, only the echo data in the antenna scanning result obtained by the S3 at the lower beam elevation angle is processed; if the elevation angle is an automatic mode and the working mode is a weather mode, the echo data in the antenna scanning result obtained by the S3 at the upper and lower beam elevation angles is processed in a multi-scan manner. The multi-scan processing refers to using the echoes at the same azimuth angle of the upper and lower beams for ground clutter suppression.

[0093] In some embodiments, in the S4, when entering a wind shear state and the elevation angle is a wind shear elevation angle, wind shear target detection and alarm are performed.

[0094] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application. The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for airborne two-dimensional active phased-array weather radar beam scanning and processing, characterized in that, The method comprises the following steps: S1: obtaining avionics information, elevation angle control mode and working mode; S2: judging whether to enter wind shear state according to the avionics information obtained in S1; S3: performing antenna scanning according to the elevation angle control mode in S1; S4: processing the antenna scanning result in S3 according to the elevation angle control mode and working mode in S1; S5: updating the main pilot image and the co-pilot image in real time through the result processed in S4, wherein the transformation of the main co-pilot elevation angle or the up-down beam elevation angle is alternately performed in the antenna scanning process in cycles of frames, the elevation angle control mode comprises an automatic elevation angle control mode and a manual elevation angle control mode, In the S3, in the elevation manual control mode and not in the wind shear state, during the antenna scanning process, the radar azimuth angle of the next frame is where n is the current frame number, is the weather radar azimuth resolution, is the radar azimuth scan range, Radar pitch angle of next frame To wherein is the main driver elevation angle, is the co-driver elevation angle, In the S3, when the azimuth angle is within and the elevation angle is in the manual control mode and enters the wind shear state, the radar azimuth angle of the next frame is wherein, n is the current frame number, is the weather radar azimuth resolution, is the radar azimuth scanning range, is the current radar elevation angle, is the wind shear elevation angle, Radar pitch angle of next frame To wherein is the main driver elevation angle, is the co-driver elevation angle, In the elevation automatic control mode and not entering the wind shear state, the radar azimuth angle of the next frame in the antenna scanning process is wherein n is a current frame number, is a weather radar azimuth resolution, is a radar azimuth scanning range, is a current radar elevation angle, is an upper beam elevation angle, is a lower beam elevation angle, Radar pitch angle of next frame To ， In the S3, when the azimuth angle is within and the elevation angle is in the automatic control mode and enters the wind shear state, the radar azimuth angle of the next frame is wherein, n is the current frame number, is the weather radar azimuth resolution, is the radar azimuth scanning range, is the current radar elevation angle, is the lower beam elevation angle, Radar pitch angle of next frame To wherein, is the wind shear elevation angle, is the upper beam elevation angle.

2. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 1, wherein, the working mode comprises a weather mode, a terrain mode and a turbulence mode.

3. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 1, wherein, In the S3, in the elevation manual control mode and when entering the wind shear state, the antenna scanning mode is the same as that when the azimuth angle is outside the range of , in the elevation manual control mode and when not entering the wind shear state, wherein, .

4. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 1, wherein, In the elevation automatic control mode and when entering the wind shear state, the antenna scanning mode is the same as that when the azimuth angle is outside wherein, .

5. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 2, wherein, In S4, if the elevation angle mode is the manual control mode, the echo data in the antenna scanning result obtained in S3 is processed in a single row.

6. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 2, wherein, In S4, if the elevation angle is the automatic mode and the working mode is the turbulence mode, only the echo data in the antenna scanning result obtained in S3 at the up-beam elevation angle is processed; if the elevation angle is the automatic mode and the working mode is the terrain mode, only the echo data in the antenna scanning result obtained in S3 at the down-beam elevation angle is processed; if the elevation angle is the automatic mode and the working mode is the weather mode, the echo data in the antenna scanning result obtained in S3 at the up-down beam elevation angle is processed in multiple scans.

7. The airborne two-dimensional active phased-array weather radar beam scanning and processing method of claim 2, wherein, In S4, when the wind shear state is entered and the elevation angle is the wind shear elevation angle, wind shear target detection and alarm are performed.

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