Method and device for comprehensive protection of radiation field of magnetic field of space optical fiber gyroscope

Abstract

The application discloses a kind of space optical fiber gyroscope magnetic field radiation field comprehensive protection design method and device, wherein the method includes obtaining the structure parameters and operating condition parameters of target optical fiber gyroscope;Based on structure parameters and operating condition parameters, respectively construct magnetic field shielding efficiency simulation model and radiation field shielding efficiency simulation model, corresponding obtain magnetic field shielding design value and radiation field shielding design value;Comprehensive protection simulation model is constructed, and magnetic field shielding design value and radiation field shielding design value are input into comprehensive protection simulation model, and the magnetic field radiation field comprehensive protection parameter design value of target optical fiber gyroscope is obtained.The optical fiber gyroscope of the application adopts the comprehensive protection structure including magnetic field shielding layer and radiation field shielding layer, by based on the structure parameters and operating condition parameters of specific optical fiber gyroscope, the modeling and efficiency calculation of magnetic field and radiation field are realized, and the optimal optical fiber gyroscope protection structure parameter design value is obtained using optimized genetic algorithm, which can directly guide actual production.

Description

Technical Field

[0001] This specification relates to the field of fiber optic gyroscope technology, and in particular to a method and device for comprehensive protection of the magnetic field radiation field of a space-use fiber optic gyroscope. Background Technology

[0002] Fiber optic gyroscopes are among the most important positioning and orientation sensors in navigation, guidance, and control fields, especially widely used in spacecraft applications, and continue to evolve towards higher precision and miniaturization. However, during measurement, fiber optic gyroscopes are affected by magnetic and radiation fields in the space environment, resulting in significant performance parameter errors and potentially leading to malfunctions. Existing passive protection methods are widely used to overcome environmental errors in fiber optic gyroscopes due to their low cost and simple structure. However, passive protection structures increase the overall weight and size of the fiber optic gyroscope, contradicting the miniaturization trend and design requirements.

[0003] Therefore, how to adequately protect fiber optic gyroscopes exposed to the space environment, enabling them to have comprehensive protection against magnetic and radiation fields, and further reduce the mass, size, and cost of fiber optic gyroscopes while meeting the accuracy requirements, in order to meet the miniaturization needs of applications such as microsatellites and small near-Earth space vehicles, are two important challenges currently facing the field of fiber optic gyroscope space application and protection technology. Summary of the Invention

[0004] The purpose of the embodiments in this specification is to address the above-mentioned problems by providing a method, device, electronic device, and storage medium for comprehensive protection of magnetic field radiation fields of space fiber optic gyroscopes.

[0005] To solve the above-mentioned technical problems, the embodiments in this specification are implemented as follows:

[0006] Firstly, a comprehensive protection design method for the magnetic field radiation field of a space-based fiber optic gyroscope is proposed, including:

[0007] Obtain the structural parameters and operating condition parameters of the target fiber optic gyroscope;

[0008] Based on the structural parameters and the operating condition parameters, a simulation model of magnetic field shielding effectiveness and a simulation model of radiation field shielding effectiveness are constructed respectively, and the design values ​​of magnetic field shielding and radiation field shielding are obtained accordingly.

[0009] A comprehensive protection simulation model is constructed, and the magnetic field shielding design value and the radiation field shielding design value are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0010] Furthermore, the structural parameters include the structure and materials of the target fiber optic gyroscope and its protective layer; the operating parameters include the spatial environment parameters of the target fiber optic gyroscope.

[0011] Furthermore, the magnetic field shielding effectiveness simulation model is used to obtain its magnetic field distribution and shielding effectiveness; and, based on the structural parameters and the operating condition parameters, a magnetic field shielding effectiveness simulation model is constructed to obtain the magnetic field shielding design value, including:

[0012] Using finite element analysis software, a structural model of the magnetic field shielding layer of the target fiber optic gyroscope was established;

[0013] Identify candidate protective materials for magnetic field shielding layers;

[0014] Based on the structural model of the magnetic field shielding layer, the internal and external magnetic field strengths of the candidate protective materials of the magnetic field shielding layer are simulated and calculated to obtain the magnetic field shielding effectiveness of the candidate protective materials of the magnetic field shielding layer.

[0015] Based on the magnetic field shielding effectiveness, the design value of the magnetic field shielding layer is obtained.

[0016] Furthermore, the radiation field shielding effectiveness simulation model is used to obtain the radiation field shielding effectiveness under different operating conditions; and, based on the structural parameters and the operating conditions, a radiation field shielding effectiveness simulation model is constructed to obtain the radiation field shielding design value, including:

[0017] A model of the near-Earth orbit and surrounding radiation environment of the target fiber optic gyroscope was constructed using a space environment simulation system.

[0018] Identify candidate protective materials for radiation field shielding layers;

[0019] Based on the radiation environment model, the radiation field shielding effectiveness of candidate protective materials for the radiation field shielding layer is calculated.

[0020] Based on the radiation field shielding effectiveness, the design value of the radiation field shielding layer is obtained.

[0021] Furthermore, a comprehensive protection simulation model is constructed, including:

[0022] Determine the multiple constraints for the comprehensive protection optimization design of the magnetic field radiation field;

[0023] The comprehensive protection simulation model was obtained based on the multi-objective optimization algorithm of NSGA-II.

[0024] Furthermore, inputting the magnetic field shielding design value and the radiation field shielding design value into the integrated protection simulation model also includes inputting the structural parameters, mass constraint values ​​and / or cost constraint values ​​into the integrated protection simulation model.

[0025] Furthermore, based on the NSGA-II multi-objective optimization algorithm, the comprehensive protection simulation model is obtained, including the following for each generation of the population:

[0026] After non-dominated sorting, selection, crossover and mutation, offspring populations are generated and the two populations are combined to form a population of double size.

[0027] Perform a fast non-dominated sort on a population of twice the size, and calculate the crowding degree of individuals in each non-dominated layer.

[0028] Based on non-dominance relationships and individual crowding, suitable individuals are selected to form a new parent population;

[0029] Using a genetic algorithm, a new offspring population is generated and merged with the parent population to form a new population, until the number of generations is reached.

[0030] Obtain a set of non-dominant Pareto optimal solutions.

[0031] Furthermore, based on the Top-First-Side (TOPSIS) method, the design values ​​of the comprehensive protection parameters of the magnetic field radiation field of the target fiber optic gyroscope are obtained, including:

[0032] Obtain comprehensive protection evaluation indicators for magnetic field radiation fields, construct an evaluation indicator matrix, and positively oriented the indicators;

[0033] Standardize the positive matrix of indicators;

[0034] Based on the preset evaluation index weights, the score of the Pareto optimal solution is calculated and the score is normalized.

[0035] The solution with the highest normalization score is selected as the design value of the comprehensive protection parameters for the magnetic field radiation field.

[0036] Secondly, a comprehensive protection design device for the magnetic field radiation field of a space-based fiber optic gyroscope is proposed, comprising:

[0037] The first module is configured to acquire the structural parameters and operating condition parameters of the target fiber optic gyroscope.

[0038] The second module is configured to construct a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model based on the structural parameters and the operating condition parameters, respectively, and obtain the magnetic field shielding design value and the radiation field shielding design value accordingly.

[0039] The third module is configured to construct a comprehensive protection simulation model, inputting the magnetic field shielding design value and the radiation field shielding design value into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0040] Thirdly, a fiber optic gyroscope is proposed, which has a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. The design values ​​of the parameters of the comprehensive protection structure are determined by the comprehensive protection design method for the magnetic field and radiation field of the space fiber optic gyroscope.

[0041] Fourthly, an electronic device is proposed, comprising: a processor; and a memory arranged to store computer-executable instructions, which, when executed, cause the processor to perform the method described in the first aspect.

[0042] Fifthly, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores one or more programs, which, when executed by an electronic device including multiple applications, cause the electronic device to perform the method described in the first aspect.

[0043] This instruction manual can achieve at least the following technical effects:

[0044] This application's embodiments obtain the structural and operational parameters of the target fiber optic gyroscope; based on these parameters, a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model are constructed, respectively, to obtain the corresponding magnetic field shielding design values ​​and radiation field shielding design values; a comprehensive protection simulation model is then constructed, and the magnetic field shielding design values ​​and radiation field shielding design values ​​are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design values ​​for the target fiber optic gyroscope's magnetic field and radiation field. The fiber optic gyroscope of this invention employs a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. By modeling and calculating the effectiveness of the magnetic field and radiation field based on the specific structural and operational parameters of the fiber optic gyroscope, an optimized genetic algorithm is used to obtain the optimal design values ​​for the fiber optic gyroscope's protection structure parameters, which can directly guide the actual production and application of fiber optic gyroscope protection structures. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is one of the schematic diagrams of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0047] Figure 2 This is the second schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0048] Figure 3 This is the third schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0049] Figure 4 This is the fourth schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0050] Figure 5 This is the fifth schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0051] Figure 6 This is the sixth schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0052] Figure 7 This is the seventh schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0053] Figure 8 This is the eighth schematic diagram of the integrated protection design method for the magnetic field radiation field of a space fiber optic gyroscope provided in the embodiments of this specification.

[0054] Figure 9 A schematic diagram of a space fiber optic gyroscope magnetic field radiation field integrated protection design device provided for embodiments of this specification.

[0055] Figure 10 This specification provides a schematic diagram of the structure of an electronic device according to one embodiment. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0057] As described in the background section, fiber optic gyroscopes are among the most successfully developed positioning and orientation sensors in the fields of navigation, guidance, and control. They can be used to measure the angular velocity of a vehicle's rotation relative to inertial space. Their advantages in terms of lifespan, reliability, power consumption, size, and mass determine their strengths and prospects in spacecraft positioning and attitude control, making them the best choice for current spacecraft applications. In recent years, with the continued booming development of the commercial space sector and the gradual prosperity of the satellite market, fiber optic gyroscopes are playing an increasingly important role in space missions, requiring further development towards higher precision and miniaturization.

[0058] However, fiber optic gyroscope measurements are susceptible to severe performance parameter errors caused by magnetic and radiation fields in the space environment, leading to malfunctions and placing high demands on the accuracy of space-based fiber optic gyroscopes. Currently, passive protection is the most widely used method for protecting fiber optic gyroscopes from environmental errors due to its low cost and simple structure. However, passive shielding structures increase the overall weight and volume of the fiber optic gyroscope, contradicting the current trend and design requirements for miniaturization. How to adequately protect fiber optic gyroscopes exposed to the space environment while meeting the accuracy requirements, and how to further reduce the gyroscope's mass, size, and cost while maintaining protection effectiveness to meet the miniaturization needs of applications such as microsatellites and small near-Earth space vehicles, are two major challenges currently facing the field of fiber optic gyroscope space applications and protection technology. In shielding structure design, existing methods have done extensive work on the influence of magnetic and radiation fields on fiber optic gyroscopes, particularly the relationship between structural parameters and magnetic field shielding effectiveness, which has been extensively discussed, and finite element simulation software is widely used for structural modeling and calculation.

[0059] However, the existing methods for designing fiber optic gyroscope protection structures have the following shortcomings: (1) The research only focuses on a single spatial environment factor. After providing design methods for magnetic field shielding layers and radiation field shielding layers separately, in actual use, typical fiber optic gyroscope structures are mostly composite structures, and the overall shielding effect of fiber optic gyroscopes under multi-layer shielding structures still cannot be accurately predicted. (2) The research only focuses on the needs of a single application scenario and is only applicable to a certain type of fiber optic gyroscope. The structural design methods and results given are not universal. (3) The research only focuses on strengthening the shielding effectiveness of fiber optic gyroscope protection structures and does not comprehensively consider the structural mass and volume, which lacks guiding significance for the design of miniaturized fiber optic gyroscope structures.

[0060] To overcome the limitations in miniaturization and high reliability design of fiber optic gyroscopes caused by the above-mentioned problems, this application provides a comprehensive protection design scheme for magnetic field and radiation fields of fiber optic gyroscopes for space applications. Specifically, considering the contradiction between the adaptability of fiber optic gyroscopes to the space environment and miniaturization, a magnetic and radiation field shielding simulation model is established based on the performance degradation mechanism caused by the magnetic field and radiation of fiber optic gyroscopes. Taking into account various factors such as structural parameters, mass, and cost, a comprehensive optimization method for magnetic-radiation field shielding, including a multi-objective optimization algorithm, is proposed. This method enables the comprehensive design of the shielding structure of fiber optic gyroscopes under space magnetic field and radiation field environments, solving the limitations of the above-mentioned problems in achieving high precision and miniaturization of gyroscopes, and providing guidance for actual production.

[0061] The following detailed description, through specific examples, illustrates a comprehensive protection design scheme for the magnetic field radiation field of a space-use fiber optic gyroscope.

[0062] Example 1

[0063] like Figure 1 The diagram shown is a schematic flowchart of a comprehensive protection design method for the magnetic field radiation field of a space-based fiber optic gyroscope, according to an embodiment of this application. The method includes:

[0064] S101: Obtain the structural parameters and operating condition parameters of the target fiber optic gyroscope.

[0065] S102: Based on the structural parameters and the operating condition parameters, construct the magnetic field shielding effectiveness simulation model and the radiation field shielding effectiveness simulation model respectively, and obtain the magnetic field shielding design value and the radiation field shielding design value accordingly.

[0066] S103: Construct a comprehensive protection simulation model, input the magnetic field shielding design value and the radiation field shielding design value into the comprehensive protection simulation model, and obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0067] In some embodiments, the structural parameters include the structure and materials of the target fiber optic gyroscope and its protective layer; the operating parameters include the spatial environment parameters of the target fiber optic gyroscope.

[0068] It should be noted that magnetic and radiation fields can degrade key performance indicators of fiber optic gyroscopes, such as zero bias, random walk coefficient, and scaling factor. For miniaturized fiber optic gyroscopes used in practical engineering applications, the correlation between fiber optic gyroscope performance errors and environmental factors such as magnetic field and radiation field dose is extracted at both theoretical and empirical levels. A typical composite structure of a space-use fiber optic gyroscope, consisting of a magnetic field shielding layer and a radiation field shielding layer, is constructed. The model's structural parameters are based on actual fiber optic gyroscope models with optimization requirements. In terms of material selection, high permeability materials are chosen for magnetic field shielding considering material performance, while the main support structure material of spacecraft components is selected for radiation field shielding considering density and cost. Simultaneously, the mission requirements of specific fiber optic gyroscope models are analyzed to determine the parameters of the space environment.

[0069] In some embodiments, the magnetic field shielding effectiveness simulation model is used to obtain its magnetic field distribution and shielding effectiveness.

[0070] In some embodiments, a magnetic field shielding effectiveness simulation model is constructed based on the structural parameters and the operating condition parameters to obtain the magnetic field shielding design value, such as... Figure 2 As shown, it includes:

[0071] S211: Using finite element analysis software, establish a structural model of the magnetic field shielding layer of the target fiber optic gyroscope.

[0072] S212: Identify candidate protective materials for magnetic field shielding layers.

[0073] S213: Based on the structural model of the magnetic field shielding layer, the internal and external magnetic field strengths of the candidate protective material of the magnetic field shielding layer are simulated and calculated to obtain the magnetic field shielding effectiveness of the candidate protective material of the magnetic field shielding layer.

[0074] S214: Based on the magnetic field shielding effectiveness, obtain the design value of the magnetic field shielding layer.

[0075] It should be noted that finite element method (FEM) simulation software was used for magnetic field shielding simulation. The magnetic field shielding structure was modeled and simulated, and the internal and external magnetic field strengths of the high-permeability material subjected to the applied electromagnetic field were calculated and simulated. The magnetic field shielding effectiveness of the material was obtained, and the relationship between the parameters of the magnetic field shielding structure and the magnetic field shielding effectiveness was analyzed. In terms of material selection, soft magnetic materials with high permeability are typically chosen for magnetic field shielding. Among them, 1J85 iron-nickel alloy has a higher permeability and is most suitable as a magnetic field shielding material.

[0076] Specifically, the ambient magnetic field mainly consists of the internal radiated magnetic field of the spacecraft, including the magnetic fields radiated by the internal components of the fiber optic gyroscope and nearby electromagnetic equipment. In one embodiment, based on practical engineering experience, the magnetic field strength is typically on the order of 1 mT. To simulate the actual magnetic field strength, a magnetic field shield is used, and a Helmholtz coil is employed in the magnetic field shielding simulation scheme to apply a large-scale uniform magnetic field of 1 mT.

[0077] In the specific implementation of this embodiment, a fiber optic gyroscope magnetic field shielding structure model can be established based on the structural parameters of a certain type of satellite fiber optic gyroscope. For the configuration of an iron-nickel alloy magnetic field shield enclosing an optical fiber loop, the three-dimensional model of the shield is simplified to a hollow cylindrical structure with variable parameters. The established model is imported into finite element simulation software, the magnetic property parameters of the material are defined, the above model is established, a clockwise circular current is applied to provide a uniform magnetic field of 1 mT, an air solution domain is established to cover the model area, and the magnetic field is calculated. In addition, while keeping other structures unchanged, the structural parameters (such as thickness) of the iron-nickel alloy shielding layer are changed, and the magnetic field distribution under different parameters is simulated. The center of the shell is used as the reference point, such as... Figure 3 As shown, the relationship curve between the magnetic field shielding thickness and shielding effectiveness of the fiber optic gyroscope, as well as the shielding effectiveness and magnetostrictive error data, were obtained.

[0078] In some embodiments, the radiation field shielding effectiveness simulation model is used to obtain the radiation field shielding effectiveness under different operating parameters.

[0079] In some embodiments, a radiation field shielding effectiveness simulation model is constructed based on the structural parameters and the operating condition parameters to obtain the radiation field shielding design value, such as... Figure 4 As shown, it includes:

[0080] S411: Using a space environment simulation system, construct a near-Earth orbit model of the target fiber optic gyroscope and its surrounding radiation environment.

[0081] S412: Identify candidate protective materials for radiation field shielding layers.

[0082] S413: Based on the radiation environment model, the radiation field shielding effectiveness of the candidate protective materials for the radiation field shielding layer is calculated.

[0083] S414: Based on the radiation field shielding effectiveness, obtain the design value of the radiation field shielding layer.

[0084] It should be noted that for radiation field shielding, Monte Carlo analysis software is used for simulation to calculate and simulate the collision paths of a certain number of radiation particles incident on a specific material, obtain the distribution of particles in the target material, calculate the radiation field shielding effectiveness of the material, and then obtain data on the relationship between the exposed radiation environment, the structural parameters of radiation field shielding and the magnetic field shielding effectiveness.

[0085] Specifically, to simulate the radiation environment faced by a spaceborne fiber optic gyroscope in a near-Earth satellite orbit, a 1000km sun-synchronous orbit was chosen as the orbital model. In this near-Earth orbit, the radiating particles affecting the spacecraft are mainly provided by geomagnetic trapping radiation and solar particle events. The model was used to provide proton and electron data for the radiation from this orbit. To simulate the situation of isotropic particle radiation irradiating a closed shielded cavity in actual space, a spherical structure was chosen for shielding. To consider the combined effect of radiation and magnetic field shielding structures, aluminum alloy, a commonly used radiation field shielding material, was selected for analysis. In practical applications, the fiber optic gyroscope has a double-layer structure, including a magnetic field shielding layer and a radiation field shielding layer. The shielding effect of the double-layer shielding structure was simulated. Keeping other structural parameters unchanged, the structural parameters of the radiation field shielding layer (such as thickness) were changed, and the radiation dose under different parameters was simulated. Figure 5 As shown, the relationship curve between the shielding thickness and shielding effectiveness of the fiber optic gyroscope radiation field and the shielding effectiveness data are obtained.

[0086] In some embodiments, a comprehensive protection simulation model is constructed, such as Figure 6 As shown, it includes:

[0087] S611: Determine multiple constraints for the comprehensive protection optimization design of the magnetic field radiation field.

[0088] S612: The comprehensive protection simulation model is obtained based on the multi-objective optimization algorithm of NSGA-Ⅱ.

[0089] It should be noted that for the design optimization of comprehensive protection, the magnetic field shielding effectiveness depends only on the iron-nickel alloy material, while the radiation field shielding effectiveness is jointly determined by the aluminum alloy and iron-nickel alloy materials. Therefore, the optimal structural parameters are optimized by considering the radiation field shielding effectiveness, magnetic field shielding effectiveness, total weight, and cost.

[0090] In some embodiments, inputting the magnetic field shielding design value and the radiation field shielding design value into the integrated protection simulation model further includes inputting the structural parameters, mass constraint values ​​and / or cost constraint values ​​into the integrated protection simulation model.

[0091] It should be noted that for application scenarios of integrated protection optimization design of fiber optic gyroscopes, constraints are set according to engineering experience and conventions. For example, the constraints require that the protection effect must reach a shielding effectiveness greater than a certain value, the material stiffness characteristics require that the material layer thickness must not be less than a certain value, and since the typical three-axis integrated satellite fiber optic gyroscope structure has gaps, adjustments to the structure need to be limited to within this spatial range.

[0092] In some embodiments, the comprehensive protection simulation model is obtained based on the NSGA-II multi-objective optimization algorithm. For each generation of the population, such as Figure 7As shown, it includes:

[0093] S711: Through non-dominated sorting, selection, crossover, and mutation, offspring populations are generated and the two populations are combined to form a double-sized population.

[0094] S712: Perform a fast non-dominated sort on a double-sized population and calculate the crowding degree of individuals in each non-dominated layer.

[0095] S713: Select suitable individuals to form a new parent population based on non-dominant relationships and individual crowding.

[0096] S714: Using a genetic algorithm, a new offspring population is generated and merged with the parent population to form a new population, until the number of generations is reached.

[0097] S715: Obtain a set of non-dominant Pareto optimal solutions.

[0098] Specifically, the NSGA-II genetic algorithm is used for multi-objective optimization. Under a simplified three-objective optimization problem, a simulation model for integrated protection of fiber optic gyroscopes is constructed, resulting in a database for optimization analysis, i.e., an initial population of a certain size. After non-dominated sorting, selection, crossover, and mutation, offspring populations are generated, and the two populations are combined to form a population of twice the size. Next, fast non-dominated sorting is performed, and the crowding degree of individuals in each non-dominated layer is calculated. Based on the non-dominated relationship and the crowding degree of individuals, suitable individuals are selected to form a new parent population. New offspring populations are generated through the basic operations of the genetic algorithm, and then merged with the parent populations to form a new population. The above operations are repeated until the iteration requirement is met.

[0099] In some embodiments, the design values ​​of the comprehensive protection parameters of the magnetic field radiation field of the target fiber optic gyroscope are obtained based on the Top-First Search (TOPSIS) method using entropy weighted superiority solution. Figure 8 As shown, it includes:

[0100] S811: Obtain comprehensive protection evaluation indicators for magnetic field radiation fields, construct an evaluation indicator matrix, and positively oriented the indicators.

[0101] S812: Standardize the index positive matrix.

[0102] S813: Calculate the score of the Pareto optimal solution based on the preset evaluation index weights and normalize the score.

[0103] S814: Select the solution with the highest normalization score as the design value of the comprehensive protection parameters for the magnetic field radiation field.

[0104] Specifically, the Top-Ranking Solution-Independent Evaluation (TOPSIS) method is used to comprehensively evaluate various evaluation indicators, including shielding effectiveness and cost-effectiveness, for fiber optic gyroscopes with different structural parameters. The relative closeness of each evaluated object to the optimal solution is calculated, serving as the basis for evaluation and providing an objective optimal solution. In the data processing stage, the composition of all indicators is explained, and the data to be processed is transformed into a matrix. Indicators are normalized, and then the normalized matrix is ​​standardized to eliminate the influence of different indicator dimensions. Finally, scores are calculated, and the scores of each non-dominated solution set are normalized. The solution with the highest normalized score is selected as the optimal objective solution.

[0105] In summary, through the optimized design of the method in this embodiment, compared with the traditional structure, the magnetic shielding effectiveness is enhanced by 5.55%, the radiation shielding effectiveness is enhanced by 0.83%, and the weight and resources are saved by 24.47%.

[0106] This application's embodiments obtain the structural and operational parameters of the target fiber optic gyroscope; based on these parameters, a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model are constructed, respectively, to obtain the corresponding magnetic field shielding design values ​​and radiation field shielding design values; a comprehensive protection simulation model is then constructed, and the magnetic field shielding design values ​​and radiation field shielding design values ​​are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design values ​​for the target fiber optic gyroscope's magnetic field and radiation field. The fiber optic gyroscope of this invention employs a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. By modeling and calculating the effectiveness of the magnetic field and radiation field based on the specific structural and operational parameters of the fiber optic gyroscope, an optimized genetic algorithm is used to obtain the optimal design values ​​for the fiber optic gyroscope's protection structure parameters, which can directly guide the actual production and application of fiber optic gyroscope protection structures.

[0107] Example 2

[0108] Figure 9 This is a structural schematic diagram of a space-use fiber optic gyroscope magnetic field radiation field integrated protection design device 900, provided as an embodiment of this specification. Please refer to... Figure 9 In one embodiment, a space fiber optic gyroscope magnetic field radiation field integrated protection design device 900 includes:

[0109] The first module 901 is configured to acquire the structural parameters and operating condition parameters of the target fiber optic gyroscope.

[0110] The second module 902 is configured to construct a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model based on the structural parameters and the operating condition parameters, respectively, and obtain the magnetic field shielding design value and the radiation field shielding design value accordingly.

[0111] The third module 903 is configured to construct a comprehensive protection simulation model, inputting the magnetic field shielding design value and the radiation field shielding design value into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0112] It should be understood that the space fiber optic gyroscope magnetic field radiation field integrated protection design device 900 of the embodiments of this specification can also perform... Figures 1 to 8 A method for implementing a comprehensive protection design device (or equipment) for the magnetic field radiation field of a fiber optic gyroscope in space, and to realize the comprehensive protection design device (or equipment) for the magnetic field radiation field of a fiber optic gyroscope in space at 900 degrees. Figures 1 to 8 The functionality of the example shown will not be elaborated upon here.

[0113] Example 3

[0114] This application proposes a fiber optic gyroscope, which has a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. The design values ​​of the parameters of the comprehensive protection structure are determined by the comprehensive protection design method for magnetic field and radiation field of a space fiber optic gyroscope described in Example 1, which will not be repeated here.

[0115] This application's embodiments obtain the structural and operational parameters of the target fiber optic gyroscope; based on these parameters, a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model are constructed, respectively, to obtain the corresponding magnetic field shielding design values ​​and radiation field shielding design values; a comprehensive protection simulation model is then constructed, and the magnetic field shielding design values ​​and radiation field shielding design values ​​are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design values ​​for the target fiber optic gyroscope's magnetic field and radiation field. The fiber optic gyroscope of this invention employs a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. By modeling and calculating the effectiveness of the magnetic field and radiation field based on the specific structural and operational parameters of the fiber optic gyroscope, an optimized genetic algorithm is used to obtain the optimal design values ​​for the fiber optic gyroscope's protection structure parameters, which can directly guide the actual production and application of fiber optic gyroscope protection structures.

[0116] Example 4

[0117] Figure 10 This is a schematic diagram of the structure of an electronic device according to one embodiment of this specification. Please refer to it. Figure 10 At the hardware level, the electronic device includes a processor, and optionally also includes an internal bus, a network interface, and memory. The memory may include main memory, such as high-speed random-access memory (RAM), or non-volatile memory, such as at least one disk drive. Of course, the electronic device may also include other hardware required for other business operations.

[0118] The processor, network interface, and memory can be interconnected via an internal bus, which can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 10 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0119] Memory is used to store programs. Specifically, programs may include program code, which includes computer operation instructions. Memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0120] The processor reads the corresponding computer program from non-volatile memory into main memory and then executes it, forming a shared resource access control mechanism at the logical level. The processor executes the program stored in memory and specifically performs the following operations:

[0121] Obtain the structural parameters and operating condition parameters of the target fiber optic gyroscope;

[0122] Based on the structural parameters and the operating condition parameters, a simulation model of magnetic field shielding effectiveness and a simulation model of radiation field shielding effectiveness are constructed respectively, and the design values ​​of magnetic field shielding and radiation field shielding are obtained accordingly.

[0123] A comprehensive protection simulation model is constructed, and the magnetic field shielding design value and the radiation field shielding design value are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0124] The above is as described in this instruction manual. Figures 1 to 8The spatial fiber optic gyroscope magnetic field radiation field integrated protection design method disclosed in the illustrated embodiments can be applied to a processor, or implemented by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this specification. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this specification can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0125] Of course, in addition to the software implementation, the electronic devices in the embodiments of this specification do not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0126] Example 5

[0127] This specification also provides an embodiment of a computer-readable storage medium that stores one or more programs, the programs including instructions that, when executed by a portable electronic device including multiple applications, enable the portable electronic device to perform... Figures 1 to 8 The illustrated embodiment provides a comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope, specifically used to perform the following methods:

[0128] Obtain the structural parameters and operating condition parameters of the target fiber optic gyroscope;

[0129] Based on the structural parameters and the operating condition parameters, a simulation model of magnetic field shielding effectiveness and a simulation model of radiation field shielding effectiveness are constructed respectively, and the design values ​​of magnetic field shielding and radiation field shielding are obtained accordingly.

[0130] A comprehensive protection simulation model is constructed, and the magnetic field shielding design value and the radiation field shielding design value are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

[0131] In summary, the above description is merely a preferred embodiment of this specification and is not intended to limit the scope of protection of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

[0132] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, a computer can be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an electronic data carrier device, a game console, a tablet computer, a wearable device, or any combination of these devices.

[0133] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0134] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0135] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

Claims

1. A comprehensive protection design method for the magnetic field radiation field of a space-use fiber optic gyroscope, characterized in that, include: Obtain the structural parameters and operating condition parameters of the target fiber optic gyroscope; Based on the structural parameters and the operating condition parameters, a simulation model of magnetic field shielding effectiveness and a simulation model of radiation field shielding effectiveness are constructed respectively, and the design values ​​of magnetic field shielding and radiation field shielding are obtained accordingly. A comprehensive protection simulation model is constructed, and the magnetic field shielding design value and the radiation field shielding design value are input into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

2. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 1, characterized in that, The structural parameters include the structure and materials of the target fiber optic gyroscope and its protective layer; the operating parameters include the spatial environment parameters of the target fiber optic gyroscope.

3. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 2, characterized in that, The magnetic field shielding effectiveness simulation model is used to obtain its magnetic field distribution and shielding effectiveness; Furthermore, based on the structural parameters and the operating condition parameters, a simulation model of magnetic field shielding effectiveness is constructed to obtain the magnetic field shielding design value, including: Using finite element analysis software, a structural model of the magnetic field shielding layer of the target fiber optic gyroscope was established; Identify candidate protective materials for magnetic field shielding layers; Based on the structural model of the magnetic field shielding layer, the internal and external magnetic field strengths of the candidate protective materials of the magnetic field shielding layer are simulated and calculated to obtain the magnetic field shielding effectiveness of the candidate protective materials of the magnetic field shielding layer. Based on the magnetic field shielding effectiveness, the design value of the magnetic field shielding layer is obtained.

4. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 2, characterized in that, The radiation field shielding effectiveness simulation model is used to obtain the radiation field shielding effectiveness under different operating conditions. Furthermore, based on the structural parameters and the operating condition parameters, a simulation model of radiation field shielding effectiveness is constructed to obtain the radiation field shielding design value, including: A model of the near-Earth orbit and surrounding radiation environment of the target fiber optic gyroscope was constructed using a space environment simulation system. Identify candidate protective materials for radiation field shielding layers; Based on the radiation environment model, the radiation field shielding effectiveness of candidate protective materials for the radiation field shielding layer is calculated. Based on the radiation field shielding effectiveness, the design value of the radiation field shielding layer is obtained.

5. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to any one of claims 1 or 2, characterized in that, Construct a comprehensive protection simulation model, including: Determine the multiple constraints for the comprehensive protection optimization design of the magnetic field radiation field; The comprehensive protection simulation model was obtained based on the multi-objective optimization algorithm of NSGA-II.

6. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 5, characterized in that, The process of inputting the magnetic field shielding design value and the radiation field shielding design value into the integrated protection simulation model also includes inputting the structural parameters, mass constraint values ​​and / or cost constraint values ​​into the integrated protection simulation model.

7. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 6, characterized in that, Based on the NSGA-II multi-objective optimization algorithm, the comprehensive protection simulation model is obtained. For each generation of the population, the model includes: After non-dominated sorting, selection, crossover and mutation, offspring populations are generated and the two populations are combined to form a population of double size. Perform a fast non-dominated sort on a population of twice the size, and calculate the crowding degree of individuals in each non-dominated layer. Based on non-dominance relationships and individual crowding, suitable individuals are selected to form a new parent population; Using a genetic algorithm, a new offspring population is generated and merged with the parent population to form a new population, until the number of generations is reached. Obtain a set of non-dominant Pareto optimal solutions.

8. The comprehensive protection design method for the magnetic field radiation field of a space fiber optic gyroscope according to claim 7, characterized in that, Based on the Top-First-Side (TOPSIS) method using entropy weighting, the design values ​​of the comprehensive protection parameters for the magnetic field radiation field of the target fiber optic gyroscope are obtained, including: Obtain comprehensive protection evaluation indicators for magnetic field radiation fields, construct an evaluation indicator matrix, and positively oriented the indicators; Standardize the positive matrix of indicators; Based on the preset evaluation index weights, the score of the Pareto optimal solution is calculated and the score is normalized. The solution with the highest normalization score is selected as the design value of the comprehensive protection parameters for the magnetic field radiation field.

9. A comprehensive protection design device for the magnetic field radiation field of a space-use fiber optic gyroscope, characterized in that, include: The first module is configured to acquire the structural parameters and operating condition parameters of the target fiber optic gyroscope. The second module is configured to construct a magnetic field shielding effectiveness simulation model and a radiation field shielding effectiveness simulation model based on the structural parameters and the operating condition parameters, respectively, and obtain the magnetic field shielding design value and the radiation field shielding design value accordingly. The third module is configured to construct a comprehensive protection simulation model, inputting the magnetic field shielding design value and the radiation field shielding design value into the comprehensive protection simulation model to obtain the comprehensive protection parameter design value of the magnetic field and radiation field of the target fiber optic gyroscope.

10. A fiber optic gyroscope, characterized in that, The fiber optic gyroscope has a comprehensive protection structure including a magnetic field shielding layer and a radiation field shielding layer. The design values ​​of the parameters of the comprehensive protection structure are determined by the comprehensive protection design method for magnetic field and radiation field of a space fiber optic gyroscope according to any one of claims 1 to 8.

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