An optimization design method for multi-physical field coupling of a spaceborne active phased array antenna

Abstract

The application discloses a kind of optimization design methods of spaceborne active phased array antenna multi-physical field coupling, solve the optimization design problem of spaceborne phased array in space particle field environment machine, electricity, heat multi-physical field coupling, comprising: according to satellite orbit, establish space irradiation dose model;Combined with structure model, assess whether structure design can satisfy irradiation shielding effect, if not, modify structure design parameter, iteration until meet irradiation shielding requirement;Establish phased array thermal analysis model, utilize thermal analysis software, calculate the temperature distribution of antenna;According to temperature distribution, combined with structure model, obtain the structural deformation of antenna;According to temperature distribution, combined with phased array radio frequency channel characteristics, obtain radio frequency channel amplitude and phase distribution, according to array structure deformation, obtain radiating element displacement, then according to this, obtain phased array electric performance;Establish the comprehensive optimization target of phased array antenna structure, thermal distribution and electric performance, repeatedly iteratively optimize, until meet machine electric heat comprehensive optimization target.

Description

Technical Field

[0001] This invention relates to an optimized design method for multi-physics coupling of a spaceborne active phased array antenna, belonging to the field of antenna technology. Background Technology

[0002] A phased array antenna is an array antenna containing a large number of tiny array elements, each of which can be independently controlled in terms of phase and amplitude. Without changing the physical shape and position of the antenna, the beam shape or beam pointing can be varied within a certain range by configuring the phase and amplitude values ​​of each array element. With the development of phased array antenna technology, spaceborne phased arrays are finding increasingly wider applications.

[0003] Spaceborne active phased array antennas operate in a vacuum and particle field environment, requiring them to withstand wide-ranging temperature variations while also meeting radiation shielding requirements for radiation-sensitive devices. Furthermore, the limitations imposed by space launch vehicles and the available space impose extremely stringent requirements on the antenna's size and weight, necessitating lightweight and low-profile designs. Therefore, spaceborne phased array antennas must withstand various external factors such as space particle fields, temperature fields, and structural deformations, while also meeting electrical performance requirements. The design of spaceborne active phased array antennas is an optimization problem considering the multi-physics coupling effects of space radiation, mechanical, electrical, and thermal fields.

[0004] Currently, the most common method for designing the mechanical, electrical, and thermal aspects of active phased array antennas is the separate design approach. This involves designing the mechanical, electrical, and thermal aspects of the phased array independently, then synthesizing the results of each design. If the requirements are not met, the deficient parts are corrected, and then adjustments are made to the affected mechanical, electrical, and thermal components until the electrical performance meets the requirements. While this design method achieves satisfactory electrical performance, it incurs significant costs in thermal control and structural design, and therefore cannot meet the application requirements of spaceborne active phased array antennas. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide an optimized design method for multi-physics coupling of spaceborne active phased array antennas. This method solves the problem of optimizing the mechanical, electrical, and thermal characteristics of spaceborne active phased array antennas under the influence of space particle fields and alternating hot and cold temperatures, as well as under the strict constraints of weight and volume for spaceborne applications.

[0006] The technical solution of this invention is: Firstly, an optimized design method for multi-physics coupling of a spaceborne active phased array antenna, comprising: Step 1: Based on the orbital environment of the spaceborne phased array, obtain the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; Step 2: Based on the structural design parameters of the phased array antenna, establish a structural model of the phased array antenna; Step 3: Based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluate whether the phased array radiation-sensitive device meets the radiation dose requirements. If not, modify the structural design parameters of the phased array antenna and return to step 2. Step 4: Establish a thermal analysis model based on the phased array antenna structure model and calculate the temperature distribution of the phased array antenna; Step 5: Based on the temperature distribution of the phased array antenna, the thermal deformation of the phased array antenna structural model is obtained, and then the deformation of the antenna radiating surface is obtained, and the position offset and pointing offset of each unit antenna of the phased array antenna radiating surface are obtained. Step 6: Based on the temperature distribution of the phased array antenna, determine the temperature distribution of the T / R components of the phased array antenna. Combined with the temperature characteristics of the T / R components, obtain the amplitude and phase changes of the excitation signal of the T / R components. Step 7: Calculate the electrical performance parameters of the phased array antenna based on the position offset and pointing offset of each element antenna of the phased array antenna radiating surface obtained in Steps 5 and 6, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing and gain. Step 8: Construct a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects. Determine whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements. Otherwise, modify the structural design parameters and repeat steps 2 to 8 until the comprehensive evaluation target is met.

[0007] Furthermore, the relationship between the total ionizing dose and the shielding thickness includes: High-orbit time meets ; When the middle track is satisfied ; Low Orbit ; in, For total ionization measurement, The equivalent aluminum thickness is the structural material of the phased array antenna.

[0008] Furthermore, the electromagnetic radiation field distribution of the phased array antenna satisfies ;in, The off-axis angle of the electromagnetic radiation field. The azimuth angle of the electromagnetic radiation field. This refers to the number of phased array antenna elements. The amplitude of the output signal of the T / R component. The electromagnetic radiation field distribution of the phased array antenna element. The imaginary unit, It is the free-space wave vector of electromagnetic waves. The spatial position vector of the phased array element antenna. The free-space wave number of electromagnetic waves. , , This represents the position offset of the unit antenna. The phase of the output signal of the T / R component.

[0009] Furthermore, the amplitude and phase of the output signal of the T / R component are obtained by fitting the test data.

[0010] Furthermore, the electrical performance parameters of the phased array antenna, including sidelobe level, beam pointing, and gain, are obtained through the radiation field distribution of the phased array antenna.

[0011] Secondly, an optimized design system for multi-physics coupling of a spaceborne active phased array antenna includes: The first module, based on the orbital environment of the spaceborne phased array, obtains the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; The second module establishes a phased array antenna structural model based on the structural design parameters of the phased array antenna. The third module, based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluates whether the phased array radiation-sensitive device meets the radiation dose requirements. If it does not meet the requirements, the structural design parameters of the phased array antenna are modified, and the second module is called again. The fourth module establishes a thermal analysis model based on the phased array antenna structure model and calculates the temperature distribution of the phased array antenna. The fifth module derives the thermal deformation of the phased array antenna structural model based on the temperature distribution of the phased array antenna, thereby obtaining the deformation of the antenna radiating surface and the positional and pointing offset of each unit antenna of the phased array antenna radiating surface. The sixth module determines the temperature distribution of the phased array antenna T / R components based on the temperature distribution of the phased array antenna, and obtains the amplitude and phase changes of the excitation signal of the T / R components by combining the temperature characteristics of the T / R components. The seventh module, based on the fifth and sixth modules, calculates the electrical performance parameters of the phased array antenna by measuring the position offset and pointing offset of each element antenna on the radiating surface of the phased array antenna, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing, and gain. The eighth module constructs a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects, and determines whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements; otherwise, the structural design parameters are modified, and modules two through eight are called repeatedly until the comprehensive evaluation target is met.

[0012] Furthermore, the relationship between the total ionizing dose and the shielding thickness includes: High-orbit time meets ; When the middle track is satisfied ; Low Orbit ; in, For total ionization measurement, The equivalent aluminum thickness of the phased array antenna structural material; The electromagnetic radiation field distribution of the phased array antenna satisfies ;in, The off-axis angle of the electromagnetic radiation field. The azimuth angle of the electromagnetic radiation field. This refers to the number of phased array antenna elements. The amplitude of the output signal of the T / R component. The electromagnetic radiation field distribution of the phased array antenna element. The imaginary unit, It is the free-space wave vector of electromagnetic waves. The spatial position vector of the phased array element antenna. The free-space wave number of electromagnetic waves. , , This represents the position offset of the unit antenna. The phase of the output signal of the T / R component.

[0013] Furthermore, the amplitude and phase of the output signal of the T / R component are obtained by fitting test data; the electrical performance parameters of the phased array antenna, including sidelobe level, beam pointing and gain, are obtained by the radiation field distribution of the phased array antenna.

[0014] Thirdly, a computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the optimized design method for multi-physics coupling of a spaceborne active phased array antenna.

[0015] Fourthly, an optimization design device for multi-physics coupling of a spaceborne active phased array antenna includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the optimization design method for multi-physics coupling of a spaceborne active phased array antenna.

[0016] The advantages of this invention compared to the prior art are: (1) This invention optimizes the structural design by taking the radiation dose of sensitive components as a constraint condition for the phased array structure design, compared with the conventional method of increasing shielding materials to meet the radiation dose requirements, and effectively reduces the weight of the phased array antenna. (2) By using the temperature-dependent changes in the amplitude and phase of the T / R component as constraints for optimization simulation, this invention makes the multi-physics coupling optimization design method more closely aligned with practical engineering applications. (3) Based on the space application background of the space particle field effect and the alternating hot and cold space temperature of the space-borne phased array, this invention realizes the optimal design of the space-borne phased array by integrating the influence of multiple physical fields such as mechanics, electricity and heat on the phased array. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 Flowchart for the multi-physics coupling optimization design of spaceborne active phased array antennas; Figure 2 This is a graph showing the relationship between total ionizing dose and shielding. Detailed Implementation

[0018] To better understand the above technical solutions, the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present invention, rather than limitations on the technical solutions of the present invention. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0019] The following description, in conjunction with the accompanying drawings, provides a more detailed explanation of the optimized design method for multi-physics coupling of a spaceborne active phased array antenna provided by an embodiment of the present invention. In the solution provided by the embodiment of the present invention, such as... Figure 1 The steps of the multiphysics coupling optimization design method for spaceborne active phased arrays are as follows: Step 1: Based on the orbital environment of the spaceborne phased array, obtain the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; Step 2: Based on the structural design parameters of the phased array antenna, establish a structural model of the phased array antenna; Step 3: Based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluate whether the phased array radiation-sensitive device meets the radiation dose requirements. If not, modify the structural design parameters of the phased array antenna and return to step 2. Step 4: Establish a thermal analysis model based on the phased array antenna structure model and calculate the temperature distribution of the phased array antenna; Step 5: Based on the temperature distribution of the phased array antenna, the thermal deformation of the phased array antenna structural model is obtained, and then the deformation of the antenna radiating surface is obtained, and the position offset and pointing offset of each unit antenna of the phased array antenna radiating surface are obtained. Step 6: Based on the temperature distribution of the phased array antenna, determine the temperature distribution of the T / R components of the phased array antenna. Combined with the temperature characteristics of the T / R components, obtain the amplitude and phase changes of the excitation signal of the T / R components. Step 7: Calculate the electrical performance parameters of the phased array antenna based on the position offset and pointing offset of each element antenna of the phased array antenna radiating surface obtained in Steps 5 and 6, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing and gain. Step 8: Construct a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects. Determine whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements. Otherwise, modify the structural design parameters and repeat steps 2 to 8 until the comprehensive evaluation target is met.

[0020] In one possible implementation, the relationship between the total ionizing dose and the shield thickness includes: High-orbit time meets ; When the middle track is satisfied ; Low Orbit ; in, For total ionization measurement, The equivalent aluminum thickness is the structural material of the phased array antenna.

[0021] Furthermore, the electromagnetic radiation field distribution of the phased array antenna satisfies ;in, The off-axis angle of the electromagnetic radiation field. The azimuth angle of the electromagnetic radiation field. This refers to the number of phased array antenna elements. The amplitude of the output signal of the T / R component. The electromagnetic radiation field distribution of the phased array antenna element. The imaginary unit, It is the free-space wave vector of electromagnetic waves. The spatial position vector of the phased array element antenna. The free-space wave number of electromagnetic waves. , , This represents the position offset of the unit antenna. The phase of the output signal of the T / R component.

[0022] Optionally, the amplitude and phase of the output signal of the T / R component are obtained by fitting the test data.

[0023] In one possible implementation, the electrical performance parameters of the phased array antenna, including sidelobe level, beam pointing, and gain, are obtained through the radiation field distribution of the phased array antenna.

[0024] like Figure 2 The relationship between total ionization dose and shielding is basically the same.

[0025] Based on the same inventive concept, this invention also provides an optimized design system for multi-physics coupling of a spaceborne active phased array antenna, comprising: The first module, based on the orbital environment of the spaceborne phased array, obtains the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; The second module establishes a phased array antenna structural model based on the structural design parameters of the phased array antenna. The third module, based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluates whether the phased array radiation-sensitive device meets the radiation dose requirements. If it does not meet the requirements, the structural design parameters of the phased array antenna are modified, and the second module is called again. The fourth module establishes a thermal analysis model based on the phased array antenna structure model and calculates the temperature distribution of the phased array antenna. The fifth module derives the thermal deformation of the phased array antenna structural model based on the temperature distribution of the phased array antenna, thereby obtaining the deformation of the antenna radiating surface and the positional and pointing offset of each unit antenna of the phased array antenna radiating surface. The sixth module determines the temperature distribution of the phased array antenna T / R components based on the temperature distribution of the phased array antenna, and obtains the amplitude and phase changes of the excitation signal of the T / R components by combining the temperature characteristics of the T / R components. The seventh module, based on the fifth and sixth modules, calculates the electrical performance parameters of the phased array antenna by measuring the position offset and pointing offset of each element antenna on the radiating surface of the phased array antenna, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing, and gain. The eighth module constructs a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects, and determines whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements; otherwise, the structural design parameters are modified, and modules two through eight are called repeatedly until the comprehensive evaluation target is met.

[0026] This invention provides a computer-readable storage medium storing computer instructions that, when executed on a computer, cause the computer to perform... Figure 1 The method described.

[0027] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0028] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0029] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0030] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0031] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0032] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. An optimized design method for multi-physics coupling of a spaceborne active phased array antenna, characterized in that, include: Step 1: Based on the orbital environment of the spaceborne phased array, obtain the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; Step 2: Based on the structural design parameters of the phased array antenna, establish a structural model of the phased array antenna; Step 3: Based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluate whether the phased array radiation-sensitive device meets the radiation dose requirements. If not, modify the structural design parameters of the phased array antenna and return to step 2. Step 4: Establish a thermal analysis model based on the phased array antenna structure model and calculate the temperature distribution of the phased array antenna; Step 5: Based on the temperature distribution of the phased array antenna, the thermal deformation of the phased array antenna structural model is obtained, and then the deformation of the antenna radiating surface is obtained, and the position offset and pointing offset of each unit antenna of the phased array antenna radiating surface are obtained. Step 6: Based on the temperature distribution of the phased array antenna, determine the temperature distribution of the T / R components of the phased array antenna. Combined with the temperature characteristics of the T / R components, obtain the amplitude and phase changes of the excitation signal of the T / R components. Step 7: Calculate the electrical performance parameters of the phased array antenna based on the position offset and pointing offset of each element antenna of the phased array antenna radiating surface obtained in Steps 5 and 6, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing and gain. Step 8: Construct a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects. Determine whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements. Otherwise, modify the structural design parameters and repeat steps 2 to 8 until the comprehensive evaluation target is met.

2. The optimized design method for multi-physics coupling of a spaceborne active phased array antenna according to claim 1, characterized in that, The relationship between the total ionizing dose and the shielding thickness includes: High-orbit time meets ; When the middle track is satisfied ; Low Orbit ; in, For total ionization measurement, The equivalent aluminum thickness is the structural material of the phased array antenna.

3. The optimized design method for multi-physics coupling of a spaceborne active phased array antenna according to claim 1, characterized in that, The electromagnetic radiation field distribution of the phased array antenna satisfies ;in, The off-axis angle of the electromagnetic radiation field. The azimuth angle of the electromagnetic radiation field. This refers to the number of phased array antenna elements. The amplitude of the output signal of the T / R component. The electromagnetic radiation field distribution of the phased array antenna element. The imaginary unit, It is the free-space wave vector of electromagnetic waves. The spatial position vector of the phased array element antenna. The free-space wave number of electromagnetic waves. , , This represents the position offset of the unit antenna. The phase of the output signal of the T / R component.

4. The optimized design method for multi-physics coupling of a spaceborne active phased array antenna according to claim 1, characterized in that, The amplitude and phase of the output signal of the T / R component are obtained by fitting test data.

5. The optimized design method for multi-physics coupling of a spaceborne active phased array antenna according to claim 1, characterized in that, The electrical performance parameters of the phased array antenna, including sidelobe level, beam pointing, and gain, are obtained through the radiation field distribution of the phased array antenna.

6. An optimized design system for multi-physics coupling of a spaceborne active phased array antenna, characterized in that, include: The first module, based on the orbital environment of the spaceborne phased array, obtains the relationship between the total ionizing dose of the satellite operating in that orbit and the shielding thickness; The second module establishes a phased array antenna structural model based on the structural design parameters of the phased array antenna. The third module, based on the relationship between total ionization dose and shielding thickness, and combined with the phased array antenna structure model, evaluates whether the phased array radiation-sensitive device meets the radiation dose requirements. If it does not meet the requirements, the structural design parameters of the phased array antenna are modified, and the second module is called again. The fourth module establishes a thermal analysis model based on the phased array antenna structure model and calculates the temperature distribution of the phased array antenna. The fifth module derives the thermal deformation of the phased array antenna structural model based on the temperature distribution of the phased array antenna, thereby obtaining the deformation of the antenna radiating surface and the positional and pointing offset of each unit antenna of the phased array antenna radiating surface. The sixth module determines the temperature distribution of the phased array antenna T / R components based on the temperature distribution of the phased array antenna, and obtains the amplitude and phase changes of the excitation signal of the T / R components by combining the temperature characteristics of the T / R components. The seventh module, based on the fifth and sixth modules, calculates the electrical performance parameters of the phased array antenna by measuring the position offset and pointing offset of each element antenna on the radiating surface of the phased array antenna, as well as the changes in amplitude and phase of the excitation signal of the T / R component; the electrical performance parameters include sidelobe level, beam pointing, and gain. The eighth module constructs a comprehensive evaluation target for the phased array's mechanical, electrical, and thermal aspects, and determines whether the phased array antenna design meets the comprehensive evaluation target. If it does, the active phased array meets the design requirements; otherwise, the structural design parameters are modified, and modules two through eight are called repeatedly until the comprehensive evaluation target is met.

7. The optimized design system for multi-physics coupling of a spaceborne active phased array antenna according to claim 6, characterized in that, The relationship between the total ionizing dose and the shielding thickness includes: High-orbit time meets ; When the middle track is satisfied ; Low Orbit ; in, For total ionization measurement, The equivalent aluminum thickness of the phased array antenna structural material; The electromagnetic radiation field distribution of the phased array antenna satisfies ;in, The off-axis angle of the electromagnetic radiation field. The azimuth angle of the electromagnetic radiation field. This refers to the number of phased array antenna elements. The amplitude of the output signal of the T / R component. The electromagnetic radiation field distribution of the phased array antenna element. The imaginary unit, For electromagnetic waves, the free space wave vector is... The spatial position vector of the phased array element antenna. The free-space wave number of electromagnetic waves. , , This represents the position offset of the unit antenna. The phase of the output signal of the T / R component.

8. The optimized design system for multi-physics coupling of a spaceborne active phased array antenna according to claim 6, characterized in that, The amplitude and phase of the output signal of the T / R component are obtained by fitting test data; the electrical performance parameters of the phased array antenna, including sidelobe level, beam pointing and gain, are obtained by the radiation field distribution of the phased array antenna.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6.

10. An optimized design device for multi-physics coupling of a spaceborne active phased array antenna, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 6.

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