A heavy frequency laser dynamic targeting digital twin experiment system and a testing method

Abstract

This invention discloses a digital twin experimental system and testing method for dynamic target firing using high-repetition-rate lasers. The system includes a high-fidelity multiphysics model cluster, a virtual diagnostic module, a data-driven interface, a simulation engine and scheduler, and a visualization and analysis platform. The model cluster includes a target flight dynamics model, a beam transmission and control model, and a beam-target interaction physical model. The data-driven interface supports bidirectional data interaction between the digital twin system and the physical target firing system. The virtual diagnostic module outputs simulation data comparable to that of the physical system. This invention possesses system-level simulation capabilities that integrate the entire chain of "target injection – trajectory measurement – ​​beam control – interaction – physical results," and can be used for virtual testing of control strategies, performance prediction of novel target components, system fault prediction and health management, significantly reducing experimental costs and risks, and accelerating research and development iterations.

Description

Technical Field

[0001] This invention relates to the technical field of simulation modeling of laser fusion experimental devices, and in particular to a digital twin experimental system and testing method for dynamic target shooting with high repetition rate laser. Background Technology

[0002] Laser fusion experimental devices are technical equipment that achieves fusion by simultaneously irradiating a fuel target with multiple high-power laser beams and utilizing inertial confinement. Multiple high-power laser beams simultaneously irradiate a target filled with high-pressure fuel gas, causing a thin plasma layer to form on its outer layer. The recoil force formed by the evaporation of this layer compresses the target, increasing its density by more than 1,000 times and bringing the center to the high temperature required for the fusion reaction, thereby achieving fusion.

[0003] Laser fusion experimental devices are extremely complex and costly to operate. Each physics experiment consumes significant resources and preparation time. Furthermore, directly testing new control algorithms, novel target structures, or exploring unknown physical parameter spaces on physical devices is not only high-risk, potentially leading to equipment damage or experimental failure, but also inefficient. Traditional computer simulations often focus on single physical processes and lack the system-level simulation capabilities to encompass the entire laser fusion chain. Consequently, they cannot serve as an equivalent alternative for comprehensive scheme verification and personnel training. Summary of the Invention

[0004] To address the problem that existing technologies focus on single physical processes and lack system-level simulation capabilities that connect the entire laser fusion chain, thus failing to serve as an equivalent alternative to laser fusion physics experiments, this application provides a digital twin experimental system and testing method for dynamic target shooting with high-repetition-rate lasers. This system can safely, efficiently, and cost-effectively complete a large number of explorations and tests that are difficult or impossible to perform in the physical world within a constructed digital space. It can be used for virtual testing of control strategies, performance prediction of novel target pellets, system fault prediction and health management, significantly reducing experimental costs and risks, and accelerating research and development iterations.

[0005] Firstly, the above-mentioned inventive objective of this application is achieved through the following technical solution: A digital twin experimental system for dynamic target firing using high-repetition-rate lasers, wherein the system conducts target firing simulation experiments by constructing a digital twin system of a physical target firing system, the system comprising: A high-fidelity multiphysics model cluster is used to perform high-precision simulation of the physical target firing process. The model cluster includes at least a target flight dynamics model, a beam transmission and control model, and a beam-target interaction physical model. The virtual diagnostic module is used to simulate the output of real diagnostic equipment and generate simulated diagnostic data that corresponds to the physical system. The data-driven interface is used to realize bidirectional data exchange between the digital twin system and the physical target system, including receiving real-time status data of the physical system to drive or correct the simulation, and outputting simulation results or control commands to the physical system. The simulation engine and scheduler are used to manage the operation, timing synchronization, and computing resource allocation of each model in the model cluster; A visualization and analysis platform is used to display the simulation process, compare virtual and real data, and conduct performance evaluations.

[0006] In a preferred embodiment, this application may be further configured such that the high-fidelity multiphysics model cluster also includes a beam-target interaction physical model that is a radiation hydrodynamic model used to simulate laser energy absorption, X-ray conversion, plasma expansion, and target implosion processes.

[0007] In a preferred embodiment, this application may be further configured such that the high-fidelity multiphysics model cluster also includes the target flight dynamics model, used to simulate the six-degree-of-freedom motion of the target under the propulsion of the injector and external disturbances.

[0008] In a preferred embodiment, this application may be further configured such that the high-fidelity multiphysics model cluster also includes the beam transmission and control model, used to simulate the transmission of laser light in a medium and the dynamic response of the actuator.

[0009] In a preferred embodiment, this application may be further configured such that the data-driven interface further includes physical system data received by the data-driven interface, including target flight trajectory data and beam-target coupling deviation data.

[0010] In a preferred embodiment, this application can be further configured such that the data-driven interface includes two working modes: a data-driven mode and a policy verification mode. The data-driven mode is used to receive real-time data from the physical system's sensors to drive or correct the simulation state, so that the digital twin keeps synchronized with the physical system. The strategy verification mode operates independently, conducting purely virtual experiments by inputting new design parameters or new control strategies.

[0011] In a preferred embodiment, the system may be further configured such that it includes a security and effectiveness test of a new control strategy generated by an edge-cloud collaborative optimization system, and allows the new control strategy to be deployed in a physical target system after the test is passed.

[0012] Secondly, the above-mentioned inventive objective of this application is achieved through the following technical solutions: A testing method for a high-repetition-rate laser dynamic target shooting digital twin experimental system, the testing method being applied to the aforementioned high-repetition-rate laser dynamic target shooting digital twin experimental system, the testing method comprising: The new control strategy to be tested is imported into the beam transmission and control model of the digital twin experimental system; In the digital twin experimental system, multiple initial conditions and disturbances are set according to the new control strategy, and the target shooting process corresponding to the new control strategy is run multiple times according to the set initial conditions and disturbances. Based on the output of the virtual diagnostic module, the coupling accuracy, success rate and system stability parameters under the new control strategy are statistically analyzed and evaluated. If the evaluation results meet the preset safety and performance thresholds, the new control strategy is allowed to be deployed on the physical system; If the requirements are not met, a corresponding analysis report will be generated to provide data support for optimizing the digital twin experimental system.

[0013] Thirdly, the above-mentioned objectives of this application are achieved through the following technical solutions: A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the test method for the above-described high-repetition-rate laser dynamic target digital twin experimental system.

[0014] Fourthly, the above-mentioned objectives of this application are achieved through the following technical solutions: A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the test method for the above-described high-repetition-rate laser dynamic target shooting digital twin experimental system.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This application constructs a digital twin system of a physical target firing system for target firing simulation experiments, including a high-fidelity multiphysics model cluster, a virtual diagnostic module, a data-driven interface, a simulation engine and scheduler, and a visualization and analysis platform. The model cluster includes a target flight dynamics model, a beam transmission and control model, and a beam-target interaction physical model; the data-driven interface supports bidirectional data interaction between the digital twin system and the physical target firing system; the virtual diagnostic module outputs simulation data corresponding to the physical system. The digital twin system of this application is highly consistent with the physical target firing system, possessing system-level simulation capabilities that connect the entire chain of "target injection - trajectory measurement - beam control - interaction - physical results." It can be used for virtual testing of control strategies, performance prediction of novel target objects, system fault prediction, and health management. By safely, efficiently, and cost-effectively completing a large amount of exploration and testing in the digital space that is difficult or impossible to perform in the physical world, it significantly reduces experimental costs and risks, and accelerates research and development iteration. 2. Significantly reduces costs and risks: It avoids equipment damage and experimental failures that may result from high-risk testing on physical systems, saving a lot of money and time; 3. Accelerate R&D iteration: In a virtual environment, massive and rapid parameter scanning and scheme comparison can be performed, shortening the long cycle of traditional "design-preparation-experimentation-analysis" by several orders of magnitude; 4. Enable predictive maintenance: By operating synchronously with the physical system, component performance degradation and potential failures can be predicted, allowing for advance maintenance and improved device availability; 5. Empowering scientific research and teaching training: It provides researchers with an unrestricted "digital sandbox" for exploring new physical mechanisms; it can also be used for skills training of operators without occupying physical devices. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a structural block diagram of the high-repetition-rate laser dynamic target shooting digital twin experimental system in this embodiment.

[0018] Figure 2 This is a schematic diagram illustrating the relationship between the physical shooting system and the digital twin system in this embodiment.

[0019] Figure 3 This is a flowchart illustrating the implementation of the testing method for the high-repetition-rate laser dynamic target shooting digital twin experimental system in this embodiment.

[0020] Figure 4 This is a schematic diagram of the internal structure of a computer device used to implement a test method for a digital twin experimental system for dynamic target shooting with high-repetition-rate lasers. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] In one embodiment, such as Figure 1 As shown, this application discloses a digital twin experimental system for dynamic target firing using high-repetition-rate lasers. Target firing simulation experiments are conducted by constructing a digital twin system of the physical target firing system. A schematic diagram illustrating the relationship between the physical target firing system and the digital twin system is shown below. Figure 2 As shown, the digital twin experimental system specifically includes: The high-fidelity multiphysics model cluster in this embodiment is composed of multiple high-precision sub-models coupled together, and is used to perform high-precision simulation of the physical target shooting process. The model cluster includes at least a target flight dynamics model, a beam transmission and control model, and a beam-target interaction physical model.

[0026] The virtual diagnostic module is used to simulate the output of real diagnostic equipment and generate simulated diagnostic data corresponding to the physical system.

[0027] The data-driven interface is used to enable bidirectional data exchange between the digital twin system and the physical target system, including receiving real-time status data of the physical system to drive or correct the simulation, and outputting simulation results or control commands to the physical system.

[0028] The simulation engine and scheduler are used to manage the operation, timing synchronization, and computing resource allocation of each model in the model cluster.

[0029] A visualization and analysis platform is used to display the simulation process, compare virtual and real data, and conduct performance evaluations.

[0030] In this embodiment, the high-fidelity multiphysics model cluster further includes: the beam-target interaction physical model is a radiation hydrodynamic model, used to simulate laser energy absorption and deposition, X-ray conversion, plasma formation and expansion, radiation transport, and target implosion processes such as target compression and fusion combustion processes.

[0031] In this embodiment, the high-fidelity multiphysics model cluster further includes: the target flight dynamics model, used to simulate the six-degree-of-freedom motion of the target under the propulsion of the injector and external disturbances.

[0032] In this embodiment, the high-fidelity multiphysics model cluster also includes: the beam transmission and control model, which is used to simulate the transmission of laser in the medium and the dynamic response of actuators such as fast reflectors, and can also embed real control algorithms, such as LSTM prediction and PID control.

[0033] In this embodiment, the virtual diagnostic module simulates the response of real diagnostic equipment such as high-speed cameras, X-ray spectrometers, and neutron counters, converting the model's physical outputs, such as density and temperature fields, into measurable signals such as images, spectral lines, and counts. This allows the simulation results to be directly compared with physical experimental data. A target-shooting simulation experiment is conducted by constructing a digital twin system of the physical target-shooting system.

[0034] In this embodiment, the data-driven interface further includes: the physical system data received by the data-driven interface includes target flight trajectory data and beam-target coupling deviation data.

[0035] In this embodiment, the data-driven interface is crucial for enabling the physical target-shooting system and its digital twin system to achieve virtual-real linkage. The data-driven interface further includes two working modes: a data-driven mode and a strategy verification mode. The data-driven mode is used to receive real-time sensor data from the physical system, such as trajectory data, to drive or correct the simulation state, so that the digital twin keeps synchronized with the physical system, and is used for state monitoring and predictive maintenance. The strategy verification mode operates independently, conducting purely virtual experiments by inputting new design parameters such as new target types, new laser waveforms, or new control strategies.

[0036] In this embodiment, the simulation engine and scheduler are responsible for coordinating the running pace of each sub-model, managing the massive computational tasks, and ensuring the efficiency and stability of the simulation process.

[0037] The visualization and analysis platform in this embodiment provides users with an intuitive display of the simulation process and powerful post-processing tools, making it easy to understand and analyze massive amounts of simulation results.

[0038] In this embodiment, the system further includes: the system is used to test the security and effectiveness of the new control strategy generated by the edge-cloud collaborative optimization system, and when the test is passed, the new control strategy is allowed to be deployed in the physical target shooting system.

[0039] In one embodiment, reference Figure 1 The physical target shooting system (800) and the digital twin system (900) are connected through a data-driven interface (700) to form a virtual-real mapping. The virtual-real mapping relationship between the digital twin system (900) and the physical target shooting system (800) is as follows: Figure 1 As shown in the figure. The physical system includes a trajectory measurement device (100), a beam control system (200), and a diagnostic device (300). The data-driven interface (700) enables bidirectional data exchange between the physical system and the digital twin system. The digital twin system includes a high-fidelity multiphysics model (901), a virtual diagnostic module (902), and a visualization and analysis platform (903). The arrows in the figure indicate the data flow direction, reflecting the bidirectional interaction between the virtual and physical systems.

[0040] See Figure 2 , Figure 2The diagram shows the internal architecture and module connections of the digital twin system (900). Within the digital twin system (900), the simulation engine (901) schedules the operation of each model, including managing the operation and timing synchronization of each model. Users can set simulation tasks through the interface (902). The high-fidelity multiphysics model cluster includes a target flight dynamics model (903), a beam transmission and control model (904), and a beam-target interaction physical model (905). Specifically, the target flight model (903) outputs the trajectory, and the beam control model (904) calculates control commands based on the embedded algorithm to drive the virtual fast-reflecting mirror. The beam-target interaction model (905) receives laser and target parameters and calculates the physical results. The virtual diagnostic module (906) simulates the functions of real diagnostic equipment and generates "measurement data." The visualization and analysis platform (907) provides simulation process display and result analysis. All data is stored and can be viewed on the analysis platform (907). The data-driven interface (700) realizes data exchange with the physical system. Arrows indicate the data transfer and calling relationships between modules.

[0041] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0042] In one embodiment, a testing method for a high-repetition-rate laser dynamic target shooting digital twin experimental system is provided. This testing method is applied to the aforementioned high-repetition-rate laser dynamic target shooting digital twin experimental system. Figure 3 As shown, the testing method of this high-repetition-rate laser dynamic target shooting digital twin experimental system includes four main steps: strategy introduction, virtual experiment, performance evaluation, and decision output. The details are as follows: Strategy Import S1: Complete the loading and verification of the new control strategy. Specifically, download the new control strategy to be tested from the cloud optimization center and import it into the beam transmission and control model of the digital twin experimental system.

[0043] Virtual Experiment S2: Conduct extensive testing in a digital twin environment. Specifically, in the digital twin experimental system, set multiple initial conditions and disturbances according to the new control strategy, such as target initial velocity deviation and laser energy fluctuations, and run the target firing process corresponding to the new control strategy multiple times according to the set initial conditions and disturbances.

[0044] Performance Evaluation S3: Determine whether to deploy based on the evaluation results. Specifically, based on the output of the virtual diagnostic module, statistically evaluate the coupling accuracy, success rate, and system stability parameters under the new control strategy. In this embodiment, the number of virtual experiments is ≥10,000, and the mean, variance, and failure rate of coupling accuracy are statistically calculated.

[0045] Decision Output S4: If the evaluation results meet the preset safety and performance thresholds, such as the statistical results being better than the current strategy of the physical system and the failure rate being lower than the preset safety threshold, then a "verification passed" report is generated, and the new control strategy is allowed to be deployed on the physical system; if not, a corresponding analysis report is generated to guide system administrators in providing data support for optimizing the digital twin experimental system.

[0046] In this embodiment, the branch paths represent the deployment process (S4a) if the test passes and the optimization suggestion process (S4b) if the test fails.

[0047] For specific limitations on the testing methods of the digital twin experimental system for dynamic target shooting with high repetition rate laser, please refer to the limitations on the digital twin experimental system for dynamic target shooting with high repetition rate laser mentioned above, which will not be repeated here.

[0048] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 4 As shown, the computer device includes a processor, memory, network interface, and database connected via a system bus. The processor provides computational and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The database stores the digital twin experimental system for high-repetition-rate laser dynamic target shooting and related test data. The network interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps of a test method for a high-repetition-rate laser dynamic target shooting digital twin experimental system.

[0049] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program being executed by a processor to implement the steps of a test method for a digital twin experimental system for dynamic target shooting with high repetition rate laser.

[0050] Those skilled in the art will recognize that the units of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application of the technical solution and the constraints involved. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of the invention.

[0051] In the embodiments provided by the present invention, it should be understood that the division of units is only a logical functional division. In actual implementation, there may be other division methods, such as multiple units can be combined into one unit, one unit can be split into multiple units, or some features can be ignored.

[0052] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0053] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A digital twin experimental system for dynamic target firing using high-repetition-rate lasers, characterized in that, The system conducts target simulation experiments by constructing a digital twin system of a physical target shooting system. The system includes: A high-fidelity multiphysics model cluster is used to perform high-precision simulation of the physical target firing process. The model cluster includes at least a target flight dynamics model, a beam transmission and control model, and a beam-target interaction physical model. The virtual diagnostic module is used to simulate the output of real diagnostic equipment and generate simulated diagnostic data that corresponds to the physical system. The data-driven interface is used to realize bidirectional data exchange between the digital twin system and the physical target system, including receiving real-time status data of the physical system to drive or correct the simulation, and outputting simulation results or control commands to the physical system. The simulation engine and scheduler are used to manage the operation, timing synchronization, and computing resource allocation of each model in the model cluster; A visualization and analysis platform is used to display the simulation process, compare virtual and real data, and conduct performance evaluations.

2. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The high-fidelity multiphysics model cluster also includes: The beam-target interaction physical model is a radiation hydrodynamic model used to simulate laser energy absorption, X-ray conversion, plasma expansion, and target implosion processes.

3. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The high-fidelity multiphysics model cluster also includes: The target flight dynamics model is used to simulate the six-degree-of-freedom motion of the target under the propulsion of the injector and external disturbances.

4. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The high-fidelity multiphysics model cluster also includes: The beam transmission and control model is used to simulate the transmission of laser light in a medium and the dynamic response of the actuator.

5. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The data-driven interface also includes: The data driven interface receives physical system data including target flight trajectory data and beam-target coupling deviation data.

6. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The data-driven interface also includes: The data-driven interface includes two working modes: data-driven mode and policy verification mode. The data-driven mode is used to receive real-time data from the physical system's sensors to drive or correct the simulation state, so that the digital twin keeps synchronized with the physical system. The strategy verification mode operates independently, conducting purely virtual experiments by inputting new design parameters or new control strategies.

7. The digital twin experimental system for dynamic target firing with high-repetition-rate laser according to claim 1, characterized in that, The system also includes: The system is used to test the security and effectiveness of new control strategies generated by the edge-cloud collaborative optimization system. Once the test is passed, the new control strategies are allowed to be deployed in the physical target shooting system.

8. A testing method for a digital twin experimental system for dynamic target firing using high-repetition-rate lasers, characterized in that, The testing method is applied to the digital twin experimental system for dynamic target firing with high-repetition-rate laser as described in any one of claims 1-7, and the testing method includes: The new control strategy to be tested is imported into the beam transmission and control model of the digital twin experimental system; In the digital twin experimental system, multiple initial conditions and disturbances are set according to the new control strategy, and the target shooting process corresponding to the new control strategy is run multiple times according to the set initial conditions and disturbances. Based on the output of the virtual diagnostic module, the coupling accuracy, success rate and system stability parameters under the new control strategy are statistically analyzed and evaluated. If the evaluation results meet the preset safety and performance thresholds, the new control strategy is allowed to be deployed on the physical system; If the requirements are not met, a corresponding analysis report will be generated to provide data support for optimizing the digital twin experimental system.

9. A computer device 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 test method for the digital twin experimental system for dynamic target shooting with high repetition rate laser as described in claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the test method for the digital twin experimental system for dynamic target shooting with high repetition rate laser as described in claim 8.

Images