An airborne electromagnetic beam adaptive control method and system

Abstract

The application discloses an airborne electromagnetic wave beam adaptive control method and system. Firstly, a plurality of key regions marked by geographical coordinate systems are converted into machine body sector of the machine body coordinate system relative to the carrier, then the machine body sector is projected to the carrier antenna array sector, the projection components of the azimuth sector range and the projection components of the elevation sector range which should be covered by each antenna array are calculated, and then the antenna array is guided to radiate electromagnetic wave beams according to the projection components of the azimuth sector range and the projection components of the elevation sector range, so that the multiple targets are adaptively covered. Through drawing the key regions and calculating the projection components during task planning, the upper limit of the target quantity can be broken through, and the adaptive capacity of the system for simultaneously covering multiple targets can be enhanced under the condition that the hardware resources of the system remain unchanged.

Description

Technical Field

[0001] This application relates to the field of electronic information technology, and more specifically, to an airborne electromagnetic beam adaptive control method and system. Background Technology

[0002] Airborne electronic systems (AFIS) consist of various electronic devices required to complete flight missions. To ensure normal and reliable operation under harsh environmental conditions such as large temperature differences, low air pressure, wide-range mechanical vibration, strong impact overload, and confined space, AFIS design and the selection of components and materials place high demands on their design. Therefore, the engineering difficulty and cost of AFIS are significantly higher than those of ordinary electronic systems.

[0003] In existing technologies, airborne electronic systems guide the antenna array to radiate electromagnetic beams based on the battlefield electromagnetic situation. They generally radiate electromagnetic beams one by one to scan targets according to predetermined wave positions, or they stay and radiate electromagnetic beams according to the angle of arrival of the target. This results in low energy utilization and low probability of correct pointing of the beam. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of existing technologies and provide an airborne electromagnetic beam adaptive control method and system. By adaptively controlling the airborne electromagnetic beam, the upper limit of the target number can be exceeded without changing the installed hardware resources of the airborne electronic system, and the electromagnetic beam can be changed from a single direction to a large-angle sector or even an omnidirectional airspace.

[0005] The objective of this application is achieved through the following technical solution:

[0006] In a first aspect, this application proposes an airborne electromagnetic beam adaptive control method, the method comprising:

[0007] Convert key areas marked in multiple geographic coordinate systems into aircraft body coordinate systems that are relative to the aircraft's body coordinate system.

[0008] Project the aircraft system sectors onto the carrier aircraft antenna array sectors respectively, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover.

[0009] The antenna array is guided to radiate electromagnetic beams based on the projection components of the azimuth and elevation sectors to achieve adaptive coverage of multiple targets.

[0010] In one possible implementation, the step of converting key areas labeled in multiple geographic coordinate systems into aircraft body sector relative to the aircraft's body coordinate system includes:

[0011] Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system;

[0012] The maximum and minimum azimuth and elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector and elevation sector.

[0013] In one possible implementation, the step of projecting the aircraft system sectors onto the carrier antenna array sectors and calculating the projection components of the azimuth sector range and the elevation sector range to be covered by each antenna array includes:

[0014] Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover;

[0015] Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors (front, rear, left, and right) that each antenna array should cover.

[0016] In one possible implementation, the step of guiding the antenna array to radiate electromagnetic beams based on the projection components of the azimuth sector and the elevation sector to adaptively cover multiple targets includes:

[0017] The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

[0018] In one possible implementation, the beam positions are arranged in a uniform, equally spaced distribution or in a unequally spaced distribution according to the beam width.

[0019] Secondly, this application also proposes an airborne electromagnetic beam adaptive control system, the system comprising:

[0020] The coordinate transformation module is used to convert key areas marked in multiple geographic coordinate systems into aircraft body coordinate systems relative to the aircraft's body coordinate system.

[0021] The projection module is used to project the aircraft system sectors onto the carrier antenna array sectors, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover.

[0022] The radiation module is used to guide the antenna array to radiate electromagnetic beams based on the projection components of the azimuth sector and the elevation sector, so as to adaptively cover multiple targets.

[0023] In one possible implementation, the coordinate transformation module is further configured to:

[0024] Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system;

[0025] The maximum and minimum azimuth and elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector and elevation sector.

[0026] In one possible implementation, the projection module is further configured to:

[0027] Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover;

[0028] Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors (front, rear, left, and right) that each antenna array should cover.

[0029] In one possible implementation, the radiation module is further configured to:

[0030] The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

[0031] In one possible implementation, the beam positions are arranged in a uniform, equally spaced distribution or in a unequally spaced distribution according to the beamwidth.

[0032] The main solution and its various further alternatives described above can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of this application, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected by this application, and will not be exhaustively listed here.

[0033] This application discloses an airborne electromagnetic beam adaptive control method and system. First, key areas marked in multiple geographic coordinate systems are converted into aircraft-level sectors relative to the aircraft's body coordinate system. Then, these aircraft-level sectors are projected onto the sectors of the aircraft's antenna array. The projection components of the azimuth and elevation sectors to be covered by each antenna array are calculated. Finally, the antenna array is guided to radiate electromagnetic beams based on these projection components, enabling adaptive coverage of multiple targets. By drawing key areas and calculating projection components during mission planning, the system can exceed the target number limit without changing the system's installed hardware resources, enhancing its adaptability to simultaneous coverage of multiple targets. Attached Figure Description

[0034] Figure 1 A flowchart illustrating an airborne electromagnetic beam adaptive control method proposed in an embodiment of this application is shown.

[0035] Figure 2A schematic diagram of the coordinate system transformation of the key area proposed in the embodiments of this application is shown.

[0036] Figure 3 This diagram illustrates the projection components of the regional azimuth angle onto the antenna array surface according to an embodiment of this application.

[0037] Figure 4 A schematic diagram showing the relative position of the key area proposed in the embodiments of this application with respect to the carrier aircraft is shown. Detailed Implementation

[0038] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0039] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0040] In the existing technology, airborne electronic systems guide the antenna array to radiate electromagnetic beams according to the battlefield electromagnetic situation. They generally radiate electromagnetic beams one by one to scan the target object according to a predetermined wave position, or they stay and radiate electromagnetic beams according to the angle of arrival of the target. This will result in low energy utilization and low probability of correct pointing of the beam.

[0041] To address the aforementioned issues, this application proposes an airborne electromagnetic beam adaptive control method and system. By drawing key areas and calculating projection components during mission planning, the system can exceed the upper limit of the number of targets without changing the system's installed hardware resources, thereby enhancing the system's adaptability to simultaneously cover multiple targets.

[0042] Please refer to Figure 1 , Figure 1 The diagram illustrates a flowchart of an airborne electromagnetic beam adaptive control method proposed in an embodiment of this application. This method, applied to an airborne electronic system, includes the following steps:

[0043] Step S100: Convert the key areas marked by multiple geographic coordinate systems into aircraft body coordinate systems sector relative to the aircraft's body coordinate system.

[0044] Step S100 also includes the following sub-steps:

[0045] Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system;

[0046] The maximum and minimum azimuth and elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector and elevation sector.

[0047] The key areas marked by the geographic system are converted into azimuth and elevation sectors relative to the aircraft system. The azimuth sector is denoted as: The range of the pitch sector is denoted as: Please refer to Figure 2 , Figure 2 The diagram illustrates the coordinate system transformation of key areas proposed in this application embodiment. The diagram shows four key areas marked with a geographic system (geographic system areas A1, A2, A3, ... An). By measuring the azimuth and elevation angles of each area, the maximum and minimum values ​​of the azimuth and elevation angles of each area are obtained. Therefore, the mechanical sector of each azimuth plane can be obtained.

[0048] Step S200: Project the aircraft system sectors onto the carrier antenna array sectors respectively, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover.

[0049] Step S200 also includes the following sub-steps:

[0050] Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover;

[0051] Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors (front, rear, left, and right) that each antenna array should cover.

[0052] The steps for converting the system sector coverage to antenna array coverage components are as follows: Convert the system azimuth sector range α... K Projected onto the sectors of the carrier aircraft's antenna array, the projection component α of the azimuth sector range to be covered by each antenna array is calculated. K =α′ f ∪α′ b ∪α′ l ∪α′ r The pitch dimension also corresponds to the azimuth dimension, and the projection component is calculated as β. L =β′ f ∪β′ b ∪β′ l ∪β′ r .

[0053] Please refer to Figure 3 , Figure 3This paper illustrates a schematic diagram of the projection components of the regional azimuth angle on the antenna array surface according to an embodiment of this application. For a geographic region A, its antenna array surface is divided into the azimuth front component and the azimuth right component.

[0054] Step S300: Guide the antenna array to radiate electromagnetic beams based on the projection components of the azimuth sector range and the projection components of the elevation sector range to achieve adaptive coverage of multiple targets.

[0055] Step S300 also includes the following sub-steps:

[0056] The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

[0057] The beam positions are arranged either uniformly at equal intervals or at unequal intervals according to the beam width.

[0058] Based on the antenna pattern, the beam positions are arranged in the four pitch component sectors (front, rear, left, and right) to guide the antenna array to radiate electromagnetic beams and simultaneously adaptively cover multiple targets. The beamwidth has a large angular spacing, while the beamnarrowness has a small angular spacing. Based on the pitch components, it can be determined whether the pitch beam is stationary or scanning.

[0059] Through the aforementioned adaptive control of the airborne electromagnetic beam, it is possible to break through the upper limit of the target number and change the electromagnetic beam from a single direction to a large-angle sector or even an omnidirectional airspace without changing the installed hardware resources of the airborne electronic system.

[0060] In one possible embodiment, please refer to Figure 4 , Figure 4 The diagram illustrates the relative positions of the key regions and the carrier aircraft according to embodiments of this application. Key regions A1 and A2 are two disconnected quadrilateral convex regions. The geographic coordinates of the four vertices of each region are longitude, latitude, and altitude. Table 1 shows the vertex coordinates of key regions A1 and A2.

[0061] Table 1

[0062]

[0063] The spatial position Po coordinates (longitude, latitude, and altitude) in the aircraft's attitude data are set, along with the flight attitude heading angle, roll angle, and pitch angle. Table 2 shows the spatial position and flight attitude of the aircraft's attitude data:

[0064] Table 2

[0065]

[0066] The airborne electromagnetic beam adaptive control method proposed in this application embodiment is then implemented. First, the geographic coordinate system is transformed to the body coordinate system, and the azimuth sector range is: α K = (10.1°, 27.6°) ∪ (301.9°, 333.3°), the pitch sector range is: β L = (-3.2°, -2.7°)∪(-4.2°, -2.7°), then the system sector to antenna array coverage components are converted to obtain the system azimuth and elevation sector projection components covered by each antenna array. The back and right components are empty. Table 3 shows the system angle sector projection components proposed in the embodiments of this application:

[0067] Table 3

[0068] Azimuth (10.1°,27.6°)∪(315°,333.3°) (301.9°,315°) Pitch angle (-4.2°,-2.7°) (-4.2°,-2.7°)

[0069] Finally, an azimuth dimension of 5° with equally spaced wave positions and a dwell time of 5ms were selected. An elevation dimension with a fixed center wave position was selected to guide the antenna array to radiate electromagnetic beams, enabling simultaneous adaptive coverage of multiple targets. Table 4 shows the antenna array wave position arrangement and dwell time:

[0070] Table 4

[0071]

[0072] Therefore, the airborne electromagnetic beam adaptive control method and system disclosed in this application first converts key areas marked in multiple geographic coordinate systems into aircraft body sectors relative to the aircraft's body coordinate system. Then, these aircraft body sectors are projected onto the antenna array sectors of the aircraft. The projection components of the azimuth and elevation sectors to be covered by each antenna array are calculated. Finally, the antenna array is guided to radiate electromagnetic beams based on these projection components, achieving adaptive coverage of multiple targets. By drawing key areas and calculating projection components during mission planning, the system can exceed the target number limit without changing the system's installed hardware resources, enhancing its adaptability to simultaneous coverage of multiple targets.

[0073] The following provides a possible implementation of an airborne electromagnetic beam adaptive control system, which executes the various execution steps and corresponding technical effects of the airborne electromagnetic beam adaptive control method shown in the above embodiments and possible implementations. The system includes:

[0074] The coordinate transformation module is used to convert key areas marked in multiple geographic coordinate systems into aircraft body coordinate systems relative to the aircraft's body coordinate system.

[0075] The projection module is used to project the aircraft system sectors onto the carrier antenna array sectors, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover.

[0076] The radiation module is used to guide the antenna array to radiate electromagnetic beams based on the projection components of the azimuth sector and the elevation sector, so as to adaptively cover multiple targets.

[0077] In one possible implementation, the coordinate transformation module is further configured to:

[0078] Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system;

[0079] The maximum and minimum azimuth and elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector and elevation sector.

[0080] In one possible implementation, the projection module is further configured to:

[0081] Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover;

[0082] Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors (front, rear, left, and right) that each antenna array should cover.

[0083] In one possible implementation, the radiation module is further configured to:

[0084] The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An airborne electromagnetic beam adaptive control method, characterized in that, The method includes: Convert key areas marked in multiple geographic coordinate systems into aircraft body coordinate systems that are relative to the aircraft's body coordinate system. The aircraft body sector includes the azimuth sector and the pitch sector. The steps for converting key areas marked in multiple geographic coordinate systems into an aircraft body sector relative to the aircraft's body coordinate system include: Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system; The maximum and minimum azimuth angles and the maximum and minimum elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector range and the elevation sector range; Project the aircraft system sectors onto the carrier aircraft antenna array sectors respectively, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover. The steps of projecting the aircraft system sectors onto the carrier aircraft antenna array sectors and calculating the projection components of the azimuth and elevation sectors to be covered by each antenna array include: Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover; Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors that each antenna array should cover: front, back, left, and right. The antenna array is guided to radiate electromagnetic beams based on the projection components of the azimuth and elevation sectors to achieve adaptive coverage of multiple targets.

2. The airborne electromagnetic beam adaptive control method as described in claim 1, characterized in that, The steps for adaptively covering multiple targets by guiding the antenna array to radiate electromagnetic beams based on the projection components of the azimuth and elevation sectors include: The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

3. The airborne electromagnetic beam adaptive control method as described in claim 2, characterized in that, The beam positions are arranged either uniformly at equal intervals or at unequal intervals according to the beam width.

4. An airborne electromagnetic beam adaptive control system, characterized in that, The system includes: The coordinate transformation module is used to convert key areas marked in multiple geographic coordinate systems into aircraft body coordinate systems relative to the aircraft's body coordinate system. The projection module is used to project the aircraft system sectors onto the carrier antenna array sectors, and calculate the projection components of the azimuth sector range and the elevation sector range that each antenna array should cover. The radiation module is used to guide the antenna array to radiate electromagnetic beams based on the projection components of the azimuth sector and the elevation sector, so as to adaptively cover multiple targets. The coordinate transformation module is also used for: Measure the azimuth and pitch angles of the aircraft relative to the key areas marked in each geographic coordinate system; The maximum and minimum azimuth angles and the maximum and minimum elevation angles of key areas marked in each geographic coordinate system are selected to form the azimuth sector range and the elevation sector range; The projection module is also used for: Project the azimuth sector range onto the carrier antenna array sector, and calculate the front, rear, left, and right azimuth component sectors that each antenna array should cover; Project the elevation sector range onto the carrier antenna array sector, and calculate the four elevation component sectors (front, rear, left, and right) that each antenna array should cover.

5. The airborne electromagnetic beam adaptive control system as described in claim 4, characterized in that, Radiation modules are also used for: The beam positions are arranged according to the projection components of the antenna pattern in the azimuth sector and the elevation sector.

6. The airborne electromagnetic beam adaptive control system as described in claim 5, characterized in that, The beam positions are arranged either uniformly at equal intervals or at unequal intervals according to the beam width.

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