Simulation system and method for monitoring satellite optical equipment

Abstract

The invention discloses a simulation system and method for monitoring satellite optical equipment, and belongs to the technical field of spacecraft simulation. The system comprises a target and scene editing module, a portable simulation video control module and a simulation video interface protocol conversion module. The target and scene editing module generates a simulation image sequence through full-link modeling; the portable simulation video control module sets simulation parameters and generates a control command; and the simulation video interface protocol conversion module receives the command and the image sequence, generates a real-time simulation video stream and injects the real-time simulation video stream into the monitored satellite optical equipment. According to the invention, a closed-loop technical scheme from scene modeling to performance evaluation is constructed, the tracking identification capability of the monitoring satellite optical equipment can be accurately tested and effectively evaluated in a repeatable and quantitative manner in a laboratory environment, and the technical limitations of high cost, long period and non-repeatability of an external field live ammunition test are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spacecraft simulation, in particular to a simulation system for monitoring satellite optical equipment and a method thereof. BACKGROUND

[0002] With the rapid iteration of space equipment and the upgrading of actual combat examination requirements, space-based monitoring satellites have gradually become the core nodes of full-range monitoring of rocket launch segments, on-orbit target patrol, and space situation awareness. Compared with ground-based photoelectric measurement and control equipment, space-based platforms have the advantages of wide observation angle, no restriction by weather and region, etc., but once the optical tracking and identification subsystem of the space-based platform is launched into orbit, it faces the dilemma of being unable to be "retested with physical objects". On-orbit testing opportunities are rare, risky, and costly, and it is difficult to reproduce the boundary conditions under complex airspace, complex lighting, and complex radiation conditions. Therefore, how to completely, realistically, and repeatedly verify the detection, tracking, and identification link performance of space-based monitoring satellites on the ground, and establish a quantitative evaluation system covering the entire chain of "target-background-atmosphere-detector", has become a key link in shortening the satellite development cycle, reducing on-orbit failure rate, and improving the comprehensive efficiency of equipment testing and identification.

[0003] In the prior art, traditional optical remote sensing satellites mainly face static ground objects for imaging, and their test and verification methods are mostly based on the mode of ground targets + field star observation: large-area targets are laid on the ground, or natural celestial bodies such as stars and planets are imaged under specific weather windows to evaluate the static modulation transfer function (MTF), signal-to-noise ratio (SNR), and radiation calibration coefficient of the camera. However, the core task of monitoring satellites has shifted from "seeing" to "staying", "distinguishing", and "following", and the optical load needs to achieve continuous and high-precision imaging and parameter inversion of cooperative / non-cooperative targets under complex space lighting conditions, high dynamic angular velocity, strong vibration, and thermal disturbance coupling environment. For example, a patent document proposes a light signal injection simulation scheme, which works as follows: first, according to the motion trajectory of the simulation target and the tracking performance of the theodolite, the possible spatial mapping relationship between the theodolite and the target during tracking is calculated, and the corresponding target and scene are projected by the target simulator. After the theodolite takes a picture, a target and scene image database is established; second, during simulation testing, the spatial mapping relationship and relative motion speed between the theodolite tracking axis and the target are measured and calculated, the stored target scene images are called, the images are processed for motion blur effect according to the relative speed, and then injected into the theodolite video acquisition processor, finally realizing the theodolite light signal injection simulation test.

[0004] The above-mentioned field scheme has the following common problems: with the continuous improvement of monitoring satellite technical indicators, the traditional "light signal injection" scheme has obvious shortcomings when facing "space-based wide field of view, high dynamics, and weak radiation contrast" applications: The controllability and repeatability of the test are poor, the angular size, spectral distribution, polarization characteristics and motion trajectory of the natural target (star, planet, moon edge, etc.) cannot be adjusted, and a wide dynamic range from "weak target" to "high contrast target" cannot be covered; once field observation is often limited by weather, moon phase, and atmospheric seeing, it is difficult to obtain a statistically valid sample in a short time, resulting in a long test period and high cost.

[0005] Multi-dimensional information coupling is difficult, spatial targets not only have geometric profile characteristics, but also have attitude rolling, surface material differences, temperature gradients and reflectivity changes, resulting in dramatic fluctuations in visible light, near-infrared and short-wave infrared radiation characteristics within a millisecond time scale. The traditional target cannot synchronously output "geometric-radiation-spectrum-polarization-angular motion" five-dimensional information, and it is difficult to support fine radiation calibration and feature library establishment of optical equipment.

[0006] Therefore, a simulation system for monitoring satellite optical equipment and a method thereof are needed to solve one of the above technical problems. SUMMARY

[0007] The purpose of the present application is to provide a simulation system for monitoring satellite optical equipment and a method thereof, which can solve at least one of the above technical problems. The specific scheme is as follows: According to the specific embodiment of the present application, the present application provides a simulation system for monitoring satellite optical equipment, comprising: A target and scene editing module for constructing and outputting a plurality of types of simulation image sequences; A portable simulation video control module connected with the target and scene editing module for setting simulation parameters and sending control commands; the simulation parameters at least include: simulation target, environment background, target trajectory, target attitude; A simulation video interface protocol conversion module connected with the portable simulation video control module and the target and scene editing module respectively for receiving the control commands and the simulation image sequences, and generating real-time simulation video streams.

[0008] Further, the target and scene editing module comprises: A target modeling unit for providing target radiation characteristic calculation function to form a spectral radiation characteristic database of the target; A background modeling unit for realizing background radiation characteristic transformation under different environmental conditions; A fusion modeling unit connected with the target modeling unit and the background modeling unit for fusing the target and the background; A scene real-time rendering unit connected with the fusion modeling unit for real-time rendering of the fused scene to generate the simulation image sequence.

[0009] Further, the target and scene editing module further comprises: A pull bias modeling unit connected between the fusion modeling unit and the scene real-time rendering unit, configured to perform random pull bias processing on the fused scene data to construct a boundary condition test scene.

[0010] Further, the target and scene editing module further comprises: A detector full-link modeling unit connected with the scene real-time rendering unit, configured to simulate the whole process from scene optical signals to image sensor output signals.

[0011] Further, the portable simulation video control module comprises: A parameter order unit configured to receive simulation target, environment background, trajectory data and target attitude parameters input by a user; A control command generation unit connected with the parameter order unit, configured to generate control commands based on the parameters and order the control commands to the simulation video interface protocol conversion module through a network.

[0012] Further, the simulation video interface protocol conversion module comprises: An embedded simulation control unit configured to receive and analyze the control commands of the portable simulation video control module; A memory unit connected with the embedded simulation control unit, configured to store the simulation image sequence and trajectory data generated by the target and scene editing module; A video output interface unit connected with the embedded simulation control unit, configured to convert the simulation image sequence into a standard video interface protocol signal based on the analyzed control commands and output the standard video interface protocol signal as the real-time simulation video stream.

[0013] Further, the simulation system further comprises: An information collection and evaluation module cooperatively arranged with the simulation video interface protocol conversion module, configured to collect state information generated by an external monitored satellite optical equipment when tracking and processing the real-time simulation video stream, and generate a performance evaluation report based on the state information.

[0014] Further, the information collection and evaluation module comprises: A data collection unit configured to receive the state information through a standard communication interface; A report generation unit connected with the data collection unit, configured to analyze the state information and generate an evaluation report containing tracking performance and target recognition capability indicators.

[0015] Further, the simulation system further comprises: A working mode switching module is configured to switch the output enable of the real-time simulation video stream by a software control command to select a simulation test mode or a device debugging mode.

[0016] According to the specific embodiments of the present application, the present application further provides a simulation method for monitoring satellite optical equipment, comprising: constructing a plurality of types of simulation image sequences; setting simulation target, environment background, target trajectory and target attitude parameters, and generating control commands according to the parameters; generating a real-time simulation video stream according to the control commands and the simulation image sequences; outputting the real-time simulation video stream to the optical equipment under test; collecting tracking state information generated by the optical equipment under test after receiving the real-time simulation video stream; generating a performance evaluation report of the optical equipment under test based on the tracking state information.

[0017] Compared with the prior art, the above-mentioned scheme of the embodiments of the present application has at least the following beneficial effects: 1. The simulation system and method for monitoring satellite optical equipment provided by the embodiments of the present application establish a full-link digital model through a target and scene editing module, break through the technical bottleneck of traditional optical signal injection limited by the optical projection range, can completely simulate the full-process trajectory from target launching to orbiting and various complex environmental conditions, and solve the core problem of the prior art "unable to simulate the full-trajectory of a spacecraft".

[0018] 2. The simulation system and method for monitoring satellite optical equipment provided by the embodiments of the present application adopt a technical route combining quantitative modeling and random biasing, establish a high-confidence infrared intrinsic radiation model through field test data calibration, and simulate target characteristic fluctuations and boundary conditions by using biasing processing, and overcome the defects of the prior art "lack of ability to construct a plurality of types of simulation targets and complex environmental models" and "unable to perform confidence evaluation".

[0019] 3. The simulation system and method for monitoring satellite optical equipment provided by the embodiments of the present application generate high-precision simulation images through a real-time rendering module, combine the direct injection and fusion injection dual modes of a simulation image injection module, effectively solve the engineering problem of the prior art relying on expensive real combat task evaluation and few test samples, and greatly improve the test efficiency and coverage. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application. It is apparent that the accompanying drawings described below are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor for those skilled in the art. In the drawings: Figure 1 A flow chart of a working process and data movement of a simulation system for monitoring satellite optical equipment according to an embodiment of the present application.

[0021] Figure 2 A flow chart of a working process of a simulation system for monitoring satellite optical equipment according to an embodiment of the present application.

[0022] Figure 3 A modeling structure diagram of a target and scene editing module according to an embodiment of the present application.

[0023] Figure 4 A flow chart of a simulation method for monitoring satellite optical equipment according to an embodiment of the present application.

[0024] Legend of reference signs: Target and scene editing module 1, portable simulation video control module 2, simulation video interface protocol conversion module 3, monitored satellite optical equipment 4, information collection and evaluation module 5. DETAILED DESCRIPTION

[0025] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two.

[0027] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0028] It should be understood that, although the terms first, second, third, etc. can be employed in describing the application, these are generally used only to distinguish one element from another, and do not necessarily require a serial or numerical order in the elements. For example, a first element could be termed a second element without departing from the scope of the example. The first, second, third, etc. terms are therefore merely labels to aid in differentiating one element from another, and are not intended to, nor should they be interpreted to, limit the scope or meaning of any claim.

[0029] It is also to be noted that the terms "comprising", "including", and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not exclude the existence of additional elements of the same kind in the process, method, article, or apparatus that comprises the element.

[0030] The optional embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0031] The application provides a simulation system for monitoring satellite optical equipment, which is mainly used for simulating the full-link motion scene of space-based targets such as satellites, generating high-confidence simulation video streams, and directly injecting the simulation video streams into the optical tracking and identification processing system of the monitoring satellite to replace the expensive and non-repetitive field live ammunition test, so as to realize the full-range, repeatable, and quantitative evaluation of the satellite tracking and identification performance in a laboratory environment.

[0032] The application provides a simulation system for monitoring satellite optical equipment, which is mainly used for simulating the full-link motion scene of space-based targets such as satellites, generating high-confidence simulation video streams, and directly injecting the simulation video streams into the optical tracking and identification processing system of the monitoring satellite to replace the expensive and non-repetitive field live ammunition test, so as to realize the full-range, repeatable, and quantitative evaluation of the satellite tracking and identification performance in a laboratory environment.

[0033] The embodiments of the application take the optical tracking processing unit of a certain space-based monitoring satellite as the measured device, and verify the working principle of the simulator system. The system converts the simulation video interface protocol through a module, and injects full-link simulation video streams into the optical tracking processing unit of the measured monitoring satellite through an LVDS interface (resolution 4096x4096, frame rate 10Hz). In this embodiment, the flight trajectory and infrared characteristics of the simulated satellite in the ascending stage are taken as examples, long-wave infrared simulation video streams are generated, and the measured device is injected.

[0034] A simulation system for monitoring satellite optical equipment, the internal relationship, workflow and data flow direction of which are as follows: Figure 1As shown, the system is specifically composed of a high-performance graphics workstation as a target and scene editing module 1, a portable computer as a portable simulation video control module 2, and a customized hardware cabinet. The hardware cabinet is integrated with a simulation video interface protocol conversion module 3, an information acquisition and evaluation module 5, and a working mode switching module.

[0035] The technical scheme simulation system of the embodiment of the application comprises: a target and scene editing module 1 for generating a simulated image data source; based on input actual combat task image data, a simulation image sequence and associated ballistic information are output through internal full-link modeling and rendering software. The portable simulation video control module 2 is used as a control terminal of the system, and sets simulation targets, environmental backgrounds, trajectories, and postures and the like through a software interface. A control command generation unit in the module encapsulates these parameters into specific control commands and sends them to downstream hardware modules for binding through a network. The simulation video interface protocol conversion module 3 is used as a core hardware unit for realizing a video stream injection function, and is integrated with a special processing system, high-speed storage, a synchronous acquisition, and an electronic system with a multi-protocol interface. The module receives a simulation image sequence from the target and scene editing module 1 and control commands from the portable simulation video control module 2, and converts them into physical video signals that can be received by a monitored satellite optical equipment 4.

[0036] The technical scheme simulation system of the embodiment further comprises: an information acquisition and evaluation module 5, which is cooperatively arranged with the simulation video interface protocol conversion module 3, is used for acquiring state information generated when an external monitored satellite optical equipment tracks and processes a real-time simulation video stream, and generates a performance evaluation report based on the state information. A working mode switching module is used for switching the output enable of the real-time simulation video stream through a software control command, so as to select a simulation test mode or a device debugging mode.

[0037] In an embodiment of the application, the target and scene editing module 1 of the system is realized based on a high-performance graphics workstation, and a special simulation software is built-in. The software integrates target modeling, background modeling, atmospheric transmission modeling, and detector full-link modeling functions, and performs real-time scene rendering based on OSG and GPU to generate a simulation image sequence containing target radiation characteristics and a complex background. The portable simulation video control module 2 is realized through an industrial control computer. Test personnel can set target trajectory, posture, and environmental parameters through a software interface thereof, and issue control commands. The simulation video interface protocol conversion module 3 is a special hardware device that receives control commands and image sequences to generate a real-time simulation video stream conforming to an LVDS interface standard.

[0038] The embodiment of the application provides a preferred technical scheme. The target and scene editing module 1 is realized through a special simulation image editing software running on a high-performance graphics workstation. The generation principle of the simulation image sequence is as follows:Figure 2 and as shown in Figure 3 The target and scene editing module 1 builds a full-link digital twin model covering the target-background-atmosphere-detection system. The construction process starts with the accurate modeling of the radiation and three-dimensional geometric characteristics of the target, as well as the radiation characteristics of the background environment based on the material library. The target and the background are fused at the physical level by coupling the relationship model with the atmospheric radiation and transmittance model. The bias model will controllably perturb key radiation and motion parameters. Finally, all scene information is driven and rendered in real time as realistic two-dimensional dynamic infrared image sequences on a high-performance rendering evaluation platform based on OSG and GPU, through the mathematical model of the detection system model simulating the real imaging link, including the effects of the optical system, the detector, and the imaging circuit. This deep modeling process ensures high physical confidence of the simulation video source.

[0039] In the embodiments of the present application, the target and scene editing module 1 comprises: A target modeling unit is configured to provide a target radiation characteristic calculation function to form a spectral radiation characteristic database of the target. By using a software algorithm, the zero-view radiation characteristics of a typical target satellite are calculated to form a database containing circumferential spectral radiation brightness and spectral radiation intensity. The spectral radiation characteristic database supports the calling of thermal flow field and spectral emissivity data under typical working conditions.

[0040] A background modeling unit is configured to realize the transformation of background radiation characteristics under different environmental conditions. A material library and a texture library are built in to simulate the radiation characteristics of the sky, the ocean, the land and other backgrounds under different weather, sea conditions, seasons and times, and to form the required contrast with the target radiation.

[0041] A fusion modeling unit is connected with the target modeling unit and the background modeling unit, and is configured to fuse the target and the background. The target model and the background model are fused, and the fused scene can be corrected according to the field test data.

[0042] A scene real-time rendering unit is connected with the fusion modeling unit, and is configured to perform real-time rendering on the fused scene to generate a simulation image sequence. The OSG and GPU-based rendering platform is used to perform real-time rendering on the scene after full-link modeling, and finally output a high-confidence simulation image sequence.

[0043] A bias model unit is connected between the fusion modeling unit and the scene real-time rendering unit, and is configured to perform random bias processing on the fused scene data to construct a boundary condition test scene. After the scene fusion, random bias is performed on the key parameters to generate a test scene for evaluating the boundary performance of the system.

[0044] The detector full-link modeling unit is connected with the scene real-time rendering unit, and is used for simulating a full process from a scene optical signal to an image sensor output signal. The full process includes a complete physical process from a target-background radiation signal, through atmospheric transmission, to optical system imaging, photoelectric sensor sampling, and conversion.

[0045] The target and scene editing module generates a simulation image sequence in the following steps: in a first step, the target modeling unit calculates a zero-view radiation characteristic of a typical target, such as a satellite, by using a software algorithm, to form a database containing a circumferential spectral radiation brightness and a spectral radiation intensity, and the database supports calling thermal flow field and spectral emissivity data under a typical working condition; in a second step, the background modeling unit simulates a radiation characteristic of a sky, an ocean, a land, and the like under different weather, sea conditions, seasons, and time conditions according to a built-in material library and a texture library; in a third step, the fusion modeling unit fuses the target model and the background model, and can correct the fused scene according to field test data; in a fourth step, the random bias modeling unit performs random bias processing on the fused scene data to construct a test scene for examining a boundary performance of a system; in a fifth step, the detector full-link modeling unit simulates a complete physical process from a target-background radiation signal, through atmospheric transmission, to optical system imaging, photoelectric sensor sampling, and conversion; and in a sixth step, the scene real-time rendering unit performs real-time rendering on the scene after full-link modeling based on an OSG and a GPU rendering platform, and finally outputs a simulation image sequence with high confidence.

[0046] In the embodiments of the present application, the technical scheme of the target and scene editing module 1 solves the problems of low simulation confidence and single scene caused by an incomplete modeling link and lack of physical basis in the prior simulation technology. By constructing a full-link physical model from a target-background-atmosphere-detection system, and integrating random bias and real-time rendering based on OSG+GPU, a simulation image sequence with high fidelity covering multiple typical and boundary conditions can be dynamically generated, so as to provide reliable and comprehensive test data sources for performance evaluation of a monitoring satellite optical equipment, and overcome the defects of limited test scenes and inability to fully examine real performance of equipment in a complex environment caused by relying on a pre-stored image library.

[0047] The portable simulation video control module 2 includes a parameter subscription element configured to receive a simulation target, an environment background, trajectory data, and a target attitude parameter input by a user; and a control command generation unit connected with the parameter subscription element, and configured to generate a control command by using the parameters, and to subscribe the control command to a simulation video interface protocol conversion module 3 through a network. In the embodiments of the present application, the portable simulation video control module 2 is physically realized by using a portable computer, and a special simulation video output control software is internally run.

[0048] In the embodiments of the present application, the parameter assembling unit presents in the form of graphical human-computer interaction interface. From the model library generated in advance by the target and scene editing module 1, each simulation parameter required for the equipment under test 4 is selected and assembled. The simulation target, the pre-defined target type is selected from the database, associated with the satellite under test, and the corresponding radiation characteristic model is obtained. The environmental background, the background conditions of the scene are set, such as clear sky ocean, cloudy land, night city, etc., to call different background radiation models. The target trajectory, the flight trajectory data of the target is input or loaded, including initial position, speed, acceleration and a series of time-space position points, to define the motion trajectory of the target. The target attitude, the attitude change data of the target in the flight process is set or loaded, such as the change relationship of pitch angle, yaw angle, roll angle with time.

[0049] In the embodiments of the present application, the control command generation unit encodes and packages each type of simulation parameter assembled according to the communication protocol format agreed in advance with the simulation video interface protocol conversion module 3, and generates a complete binary control command frame which can be parsed and executed by the lower module. Through the built-in gigabit Ethernet port of the portable computer, using the TCP / IP protocol, the packaged control command frame and related trajectory data packet are stably and reliably sent and assembled, that is, written into the specified storage address or command register of the embedded system of the simulation video interface protocol conversion module 3. This process completes the task configuration of the lower hardware module, so that it is ready to generate a specific simulation video stream according to the instruction.

[0050] In the embodiment of the present application, the simulation video interface protocol conversion module 3 is an independent and customized hardware device, which is the core physical carrier for realizing the video stream injection function, receives upper layer instructions and data, and generates simulation video stream meeting strict timing requirements in real time. It includes: an embedded simulation control unit, which is used for receiving and analyzing the control commands of the portable simulation video control module 2, and accurately scheduling and managing the reading, processing and output timing of image data according to the installed trajectory and attitude parameters. A memory unit, in the embodiment of the present application, is composed of a simulation video storage module and a target and scene simulation image cache unit. The simulation video storage module is used for saving a complete simulation image sequence library; the target and scene simulation image cache unit provides high-speed frame data access support required for real-time video stream output for the embedded control system during the test. The memory unit is connected with the embedded simulation control unit, and is used for storing the simulation image sequence and trajectory data generated by the target and scene editing module 1. A video output interface unit is connected with the embedded simulation control unit, and is used for converting the simulation image sequence into standard video interface protocol signals and outputting them as real-time simulation video stream according to the analyzed control commands. In the embodiment of the present application, the video output interface unit integrates multiple standard video interface driving chips. The digital image data processed by the embedded control system is converted into simulation video stream meeting specific electrical and protocol specifications, and the final simulation video stream is output and directly injected into the image acquisition and processing link of the monitored satellite optical equipment 4.

[0051] In the embodiment of the present application, the embedded simulation control unit is realized by the FPGA chip, the ARM chip or the DSP chip in the prior art, or the combination of the above chips. The control commands from the portable simulation video control module 2 are received through the communication interface unit such as the gigabit Ethernet, and are analyzed in real time. The control commands contain target trajectory, attitude, and simulation image sequence index to be called and other information. The memory unit is composed of one or more pieces of large-capacity and high-speed DDR SDRAM chips, receives and stores various simulation image sequences and precise trajectory data downloaded from the portable simulation video computer, and provides high-speed random reading support of required image data for the embedded simulation control unit. The video output interface unit is composed of a dedicated video interface driving chip and a connector, receives the instructions of the embedded simulation control unit, reads the corresponding image data from the memory in real time, and converts them into electrical signals meeting the standard video interface protocols such as LVDS or 2711. Finally, a real-time simulation video stream with high resolution and high frame rate is generated, and is directly injected into the monitored satellite optical equipment 4, that is, the image processor of the monitored satellite, through the physical interface.

[0052] In the embodiment of the present application, the information collection and evaluation module 5 comprises: a data collection unit configured to receive state information through a standard communication interface; and a report generation unit connected to the data collection unit and configured to analyze the state information and generate an evaluation report containing tracking performance and target recognition capability indicators. The data collection unit of the information collection and evaluation module 5 receives, in real time, state information such as azimuth angle, elevation angle, and tracking error fed back by the monitored satellite image processor through an Ethernet port. The report generation unit analyzes the information and automatically generates a quantitative performance evaluation report containing indicators such as tracking accuracy and recognition success rate.

[0053] In the embodiment of the present application, the simulation system further comprises a working mode switching module configured to switch the output enablement of the real-time simulation video stream through a software control command to select a simulation test mode or a device debugging mode. The working mode switching module controls the enablement signal of the video output interface unit by sending a specific instruction to the embedded system, thereby switching between outputting the simulation video stream and disconnecting the simulation video and connecting the real signal.

[0054] The simulation system for monitoring satellite optical equipment provided by the embodiment of the present application generates high-confidence simulation image sequences by adopting full-link physical modeling and real-time rendering technology through the construction of a collaborative system composed of a target and scene editing module 1, a portable simulation video control module 2, and a simulation video interface protocol conversion module 3, and directly injects the simulation video stream into the image processing system of the monitored satellite through a standard interface by using network binding and embedded hardware conversion technology, thereby realizing the accurate testing and evaluation of the tracking and recognition performance of the monitoring satellite optical equipment in a laboratory environment, which is repeatable, quantitative, and fully covers, effectively replacing the traditional field live-fire test, and significantly improving the testing efficiency and identification reliability.

[0055] The embodiment of the present application also provides a simulation and detection method for monitoring satellite optical equipment, as shown in Figure 4 The specific implementation includes the following steps: S1, construct a simulation image sequence, based on the collected real combat task target image and environmental background image data, perform target radiation characteristic calculation by a target modeling unit to form a target spectral radiation characteristic database; perform background radiation characteristic transformation under different environmental conditions by a background modeling unit; fuse the target and the background by a fusion modeling unit; and finally generate simulation image sequences of multiple types by real-time rendering of the fused scene by a scene real-time rendering unit.

[0056] S2, set parameters and generate control commands, on the portable computer, set specific simulation targets, environmental background, target trajectory and target attitude parameters. The parameters are packaged into control commands according to the predetermined communication protocol format. It is realized by the portable simulation video control module 2, the parameter packaging unit receives the simulation target, environmental background, target trajectory and target attitude parameters input by the user; the control command generation unit packages the parameters according to the predetermined communication protocol format, generates the control command; and the control command is packaged into the simulation video interface protocol conversion module 3 through the network.

[0057] S3, generate real-time simulation video stream, the embedded system in the protocol converter receives and analyzes the control command, and simultaneously calls the simulation image sequence matched with the command from the memory. The video interface chip integrates the image sequence into real-time simulation video stream consistent with the motion characteristics of the real target according to the trajectory and attitude data. It is realized by the simulation video interface protocol conversion module 3, the embedded simulation control unit receives and analyzes the control command; the memory provides cache support for the simulation image sequence and trajectory data; and the video output interface unit converts the image sequence into standard video interface protocol signal according to the analyzed command, and generates real-time simulation video stream.

[0058] S4, output the video stream to the device under test 4, the generated real-time simulation video stream is directly injected into the image tracking processing subsystem of the monitored satellite through the high-speed video interface such as LVDS, replacing the real signal collected by the optical sensor.

[0059] S5, collect tracking state information, collect and record all internal state information generated by the monitored satellite when processing the simulation video stream in real time through the Ethernet cable, including but not limited to target position, tracking error, identification mark, etc. It is realized by the information collection and evaluation module 5, the data collection unit receives the tracking state information generated by the optical equipment under test through the standard communication interface.

[0060] S6, generate performance evaluation report, analyze the collected tracking state information offline or online, calculate the key performance indicators such as tracking stability, identification accuracy, reaction time, and automatically generate a detailed graphic performance evaluation report, which provides data support for the identification and finalization of the monitoring satellite.

[0061] The method for monitoring the simulation system of the satellite optical equipment provided by the embodiment of the application, by sequentially performing the complete steps of constructing a full-link simulation image sequence, binding simulation parameters and generating control commands, converting to generate a real-time simulation video stream, injecting the measured device 4, collecting tracking state information and generating a performance evaluation report, a closed-loop technical solution from scene modeling to performance evaluation is constructed, the tracking and recognition capability of the monitoring satellite optical equipment is repeatedly, quantitatively and accurately tested and effectively evaluated, and the technical limitations of high cost, long cycle and non-repeatability of field live-fire testing are overcome.

[0062] The flowcharts and block diagrams in the drawings illustrate the possible implementation architecture, function and operation of the system, method and computer program product according to various embodiments of the application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders than that noted in the figure. For example, two blocks indicated in succession can actually be executed substantially in parallel, and sometimes in reverse order, depending on the function involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0063] The units involved in the embodiments of the application can be implemented in a software manner or in a hardware manner. Among them, the name of the unit does not constitute a limitation on the unit itself in some cases.

Claims

1. A simulation system for monitoring satellite optical equipment, characterized in that, The simulation system comprises: a target and scene editing module for constructing and outputting multiple types of simulation image sequences; a portable simulation video control module connected with the target and scene editing module for setting simulation parameters and sending control commands; the simulation parameters at least include a simulation target, an environment background, a target trajectory, and a target attitude; a simulation video interface protocol conversion module connected with the portable simulation video control module and the target and scene editing module respectively for receiving the control commands and the simulation image sequences and generating a real-time simulation video stream.

2. The simulation system of claim 1, wherein, The target and scene editing module comprises: a target modeling unit for providing a target radiation characteristic calculation function and forming a target spectral radiation characteristic database; a background modeling unit for realizing background radiation characteristic transformation under different environment conditions; a fusion modeling unit connected with the target modeling unit and the background modeling unit for fusing the target and the background; a scene real-time rendering unit connected with the fusion modeling unit for real-time rendering of the fused scene and generating the simulation image sequences.

3. The simulation system of claim 2, wherein, The target and scene editing module further comprises: a biasing model unit connected between the fusion modeling unit and the scene real-time rendering unit for performing random biasing processing on the fused scene data and constructing a boundary condition test scene.

4. The simulation system of claim 2, wherein, The target and scene editing module further comprises: a detector full-link modeling unit connected with the scene real-time rendering unit for simulating a whole process from scene optical signals to image sensor output signals.

5. The simulation system of claim 1, wherein, The portable simulation video control module comprises: a parameter loading unit for receiving user inputted simulation target, environment background, trajectory data, and target attitude parameters; a control command generation unit connected with the parameter loading unit for generating control commands from the parameters and loading the control commands to the simulation video interface protocol conversion module through a network.

6. The simulation system of claim 1, wherein, The simulation video interface protocol conversion module comprises: an embedded simulation control unit for receiving and analyzing the control commands of the portable simulation video control module; a memory unit connected with the embedded simulation control unit for storing the simulation image sequences and trajectory data generated by the target and scene editing module; a video output interface unit connected with the embedded simulation control unit for converting the simulation image sequences into standard video interface protocol signals and outputting the standard video interface protocol signals as the real-time simulation video stream according to the analyzed control commands.

7. The simulation system of claim 1, wherein, The simulation system further comprises: an information collection and evaluation module cooperatively arranged with the simulation video interface protocol conversion module for collecting state information generated by an external monitored satellite optical equipment during tracking processing according to the real-time simulation video stream and generating a performance evaluation report based on the state information.

8. The simulation system of claim 7, wherein, The information collection and evaluation module comprises: a data collection unit for receiving the state information through a standard communication interface; a report generation unit connected with the data collection unit for analyzing the state information and generating an evaluation report containing tracking performance and target recognition capability indexes.

9. The simulation system of claim 1, wherein, The simulation system further comprises: The working mode switching module is configured to switch the output enable of the real-time simulation video stream by a software control command to select a simulation test mode or a device debugging mode.

10. A method of monitoring a simulation system of an optical equipment of a satellite according to any one of claims 1 to 9, characterized in that, The method comprises: constructing a plurality of types of simulation image sequences; setting simulation target, environment background, target trajectory and target attitude parameters, and generating control commands according to the parameters; generating a real-time simulation video stream according to the control commands and the simulation image sequences; outputting the real-time simulation video stream to the optical equipment under test; collecting tracking state information generated by the optical equipment under test after receiving the real-time simulation video stream; generating a performance evaluation report of the optical equipment under test based on the tracking state information.

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