CN103593514B - Multi-spectral-coversynthetic synthetic environment simulation system - Google Patents
Multi-spectral-coversynthetic synthetic environment simulation system Download PDFInfo
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Abstract
Multi-spectral-coversynthetic synthetic environment simulation system, comprises synthetic environment Modelling and calculation unit, synthetic environment data Sedris Standardisation Cell and synthetic environment is played up and visualization; Instant invention overcomes the deficiencies in the prior art, solve complicated true environment in l-G simulation test and it is difficult to simulation, lack Environmental support data accurate, effective simultaneously, fail to fully demonstrate environmental factors to the problem of test impact, achieve the modeling of the synthetic environments such as air, infrared, electromagnetism, SEDRIS stdn and visual, for Simulation Application provides the synthetic environment data of stdn, for the Combat Efficiency Evaluation of weapons system provides support.
Description
Technical field
The present invention relates to and a kind of the synthetic environment that air, infrared and electromagnetism are formed is carried out modeling, data normalization and the visual system played up, belong to virtual experiment technology field.
Background technology
The performance of weapons system can be produced material impact by synthetic environment, but because lacking accurate, effective environmental data in virtual test process as support, and certainly environmental data is reusable and the problem of heterogeneous network interoperability to fail better solutions, thus reduce the precision of virtual test result. Many spectrum section synthetic environment analogy method emphasis solve the modeling and simulating problem of the virtual test synthetic environments such as air, infrared, electromagnetism, for virtual test provides synthetic environment data that are comprehensive, accurate, lasting and standard, under disclosing complicated condition of battlefield, environmental factors is on the intrinsic impact of weapons system, for the Combat Efficiency Evaluation of weapons system provides support.
At present, both at home and abroad to the emulation of synthetic environment, the research of Modeling Platform, mainly concentrate on the study on the synthesis to the aspect such as comprehensive natural, geographical environment, and study on the synthesis for many spectrums section environment such as air, infrared, electromagnetism is few. If JMASE is infrared environmental modeling and emulation platform, by object oriented designing, define a series of standards, service and model api interface, facilitate reusing and the interoperability of system model of model code. Based on External rendering, under JMASE framework, establish a reusable infrared simulation model that radiation signal in the emulation of infrared environment is calculated and managed, develop a three-dimensional atmospheric model component. But this system cannot emulate and modeling air and electromagnetic environment, data standard transforms also just based on JMASE platform environment, this tool set can only be applied, for the data layout not unified standard of not homology, cannot carry out issuing and calling between heterogeneous system.
In addition, if AGETIM is that a based on the novel 3D terrain environment modeling tool of SEDRIS, this instrument is applicable to the detection of light/ray, comprise infrared, electromagnetism and sonic spectra section are detected, modeling. But in modeling except the three-dimensional modeling comprising scene and target, it does not have infrared, the electromagnetic property modeling (the infrared characteristic modeling of such as flame, light and the electromagnetic property modeling of radar) of scene and target; Simultaneously, scene and the target multi channel imaging of (infrared imaging and SAR imaging) under sensor different-waveband, except (infrared, visual and night vision mode under there is different-waveband, there is no SAR imaging) multi channel imaging outside, not there is scene and target is infrared, the calculating of the characteristic of electromagnetism (ir radiation of scene and target calculates, and propagation properties calculates and the RCS of target calculates) function. Further, lack the visual of synthetic environment in whole simulation process and play up function.
Summary of the invention
The technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, develop a many spectrums section synthetic environment simulation software system based on SEDRIS standard, solve complicated true environment in l-G simulation test and it is difficult to simulation, lack Environmental support data accurate, effective simultaneously, fail to fully demonstrate environmental factors to the problem of test impact, achieve the modeling of the synthetic environments such as air, infrared, electromagnetism, SEDRIS stdn and visual, for Simulation Application provides the synthetic environment data of stdn, for the Combat Efficiency Evaluation of weapons system provides support.
The technology of the present invention solution is as follows: Multi-spectral-coversynthetic synthetic environment simulation system, comprises synthetic environment Modelling and calculation unit, synthetic environment data Sedris Standardisation Cell and synthetic environment is played up and visualization;
Synthetic environment Modelling and calculation unit, according to treating that artificial tasks completes that air, scene and target be infrared and the modeling of electromagnetic property, namely sets up the infrared characteristic model of atmospheric model, scene and target, scene and the electromagnetic property model of target, infrared special efficacy model; The infrared characteristic model of the scene set up and target carries out atmospheric heat transmission effects calculating and scene and target thermal radiation calculate, obtain the ir radiation data under different spectral coverage; Infrared special efficacy model is carried out scene special effect scattering and radiation characteristic calculating, obtains the infrared special effects data under different spectral coverage; The electromagnetic property model of the scene set up and target is carried out electromagnetic propagation property calculation and the calculating of target electromagnetic reflection characteristic, obtains the electromagnetic data under different spectral coverage and target electromagnetic characteristic data; Read the atmosphere data under the different heights of atmospheric model generation, the atmosphere data under the ir radiation data under different spectral coverage and special effects data, electromagnetic data, target electromagnetic characteristic data and different heights is referred to as synthetic environment data and is sent to synthetic environment data Sedris Standardisation Cell;
Synthesis environmental data, by receiving the synthetic environment data composed section synthetic environment Modelling and calculation unit and send, according to SEDRIS standard, is changed, stored in Sedris synthetic environment database after converting more by synthetic environment data Sedris Standardisation Cell;
Synthetic environment is played up and visualization reads the synthetic environment data of Sedris standard format under current artificial tasks from Sedris synthetic environment database, utilize dynamic load technology according to emulation propelling process progressively by synthetic environment Data import in visual scene, and the visual scene after loading is played up.
Described synthetic environment Modelling and calculation unit comprises material classification submodule block, infrared characteristic calculates module, electromagnetic property calculates module, atmosphere data generation module and particle effect module;
The satellite image map of the scene that material classification submodule block obtains and target or take photo by plane image or target texture pinup picture, the image obtained is classified according to material properties, for different classification, generate different material coding file (MCM) and material system file (.ms) as the infrared characteristic model of scene and target; Simultaneously according to CAD geometric model and the scene model of objective body, the region that objective body and scene have identical material is divided; The electromagnetism material information of different zones is gathered for corresponding electromagnetic property file is as the electromagnetic property model of scene and target;
Particle properties parameter is arranged by particle effect module according to emulation demand, generates infrared special efficacy model;
It is three-dimensional with reference to the air source data in atmospheric model that atmosphere data generation module obtains NRLMSISE-00, and air source data carry out the atmosphere data being converted under the different heights in units of longitude and latitude of time and system of coordinates;
Infrared characteristic calculates module and encodes file (MCM) and the atmospheric radiation decay factor of material system file (.ms) and acquisition according to different materials, obtains the ir radiation data under different spectral coverage; Simultaneously according to the infrared special effects data under infrared special efficacy model generation different spectral coverage;
Electromagnetic property calculates module according to treating simulated environment, the equipment position of configuration electromagnetism equipment, equipment is frequently, plant capacity, the facility switching machine time, equipment moving trace information and scene terrain information, generate an XML configuration file, in conjunction with the electromagnetic property file of above-mentioned different zones, generate the electromagnetic data under different spectral coverage, configure the equipment position of electromagnetism equipment simultaneously, the distance of plant capacity and equipment and target, the profile nature of the CAD 3D model of combining target, generate target property XML configuration file, and then generate target radar echo area and target electromagnetic characteristic data.
The step that synthesis environmental data is changed by described synthetic environment data Sedris Standardisation Cell is as follows:
(1) according to the expression model (DRM) in SEDRIS standard, the synthetic environment data received are combined again;
(2) Spatial reference model (SRM) is utilized to define the reference coordinate of environmental objects, under the synthetic environment data after step (1) being combined are transformed into above-mentioned reference frame;
(3) environment for use data encoding convention (EDCS) describes the attribute of the ir radiation data in the rear synthetic environment data of step (2) process and special effects data, electromagnetic data and atmosphere data;
(4) data after step (3) being processed preserve as STF formatted file.
Described synthetic environment is played up and visualization utilizes dynamic load technology progressively to play up completing the visual of synthetic environment in synthetic environment Data import to visual scene according to emulation propelling process, it is achieved step is as follows:
(1) download the satellite geographic information data of high precision, the data under different scene are stored into hard disc of computer according to simulation process by the satellite geographic information database of synthetic environment data and download, obtain multiple independent data packet;
(2), when emulation starts, it is loaded in internal memory by disposable for all data packets in hard disc of computer;
(3) along with the propelling of emulation and the change of scene, progressively the corresponding data bag in internal memory is loaded in visual scene.
Described playing up comprises infrared and electromagnetism and plays up two portions;
Wherein, infrared render process is as follows:
(1) unit grey scale numerical value is determined;
(2) ir radiation data in the synthetic environment data of loading and grey scale numerical value are carried out scale operation, obtain the gray-scale value that different ir radiation data is corresponding;
(3) according to above-mentioned gray-scale value, generate gray-scale map, namely complete the infrared image of scene and target and the visual of infrared special efficacy;
Electromagnetism render process is as follows:
The first step, arranges distinct colors for different electromagnetism intensities;
2nd step, according to the electromagnetic data in the synthetic environment data loaded, loads corresponding color in the visual scene loaded.
The present invention's useful effect compared with prior art:
(1) complete in unified system platform air, infrared and electromagnetic environment modeling, scene and target infrared characteristic calculates, infrared special efficacy calculates, electromagnetic propagation property calculation and target electromagnetic reflection characteristic calculates, synthetic environment data Sedris stdn and synthetic environment data render and visual all functions, it is achieved that from environmental modeling, property calculation, data normalization and data render and visual whole process;
(2) take SEDRIS as standard, achieve the stdn of atmosphere data, infrared data, electromagnetic propagation characteristic data and target electromagnetic reflection characteristic data, solve the problem of data reusing and isomerism, it is achieved that the using and transmitting in heterogeneous system of synthetic environment data;
(3) the emulation dynamic load technology of the air of big data quantity, infrared, electromagnetism synthetic environment data and satellite geographic information data is achieved, achieve the distributed load of big data, improve the initialize speed of emulation, and improve precision and the display degree of visual scene.
Accompanying drawing explanation
Fig. 1 is system composition frame chart of the present invention;
Fig. 2 is material classification process figure of the present invention;
Fig. 3 is infrared characteristic calculation flow chart of the present invention;
Fig. 4 electromagnetic propagation property calculation schema;
Fig. 5 the electromagnetic characteristic of the goal is calculated schema;
Embodiment
The general frame of native system is the distributed many subsystems emulation platform based on HLA/RTI, as shown in Figure 1, comprises synthetic environment Modelling and calculation unit, synthetic environment data Sedris Standardisation Cell and synthetic environment is played up and visualization; Synthetic environment Modelling and calculation unit, according to treating that artificial tasks completes that air, scene and target be infrared and the modeling of electromagnetic property, namely sets up the infrared characteristic model of atmospheric model, scene and target, scene and the electromagnetic property model of target, infrared special efficacy model; The infrared characteristic model of the scene set up and target carries out atmospheric heat transmission effects calculating and scene and target thermal radiation calculate, obtain the ir radiation data under different spectral coverage; Infrared special efficacy model is carried out scene special effect scattering and radiation characteristic calculating, obtains the infrared special effects data under different spectral coverage; The electromagnetic property model of the scene set up and target is carried out electromagnetic propagation property calculation and the calculating of target electromagnetic reflection characteristic, obtains the electromagnetic data under different spectral coverage and target electromagnetic characteristic data; Read the atmosphere data under the different heights of atmospheric model generation, the atmosphere data under the ir radiation data under different spectral coverage and special effects data, electromagnetic data, target electromagnetic characteristic data and different heights is referred to as synthetic environment data and is sent to synthetic environment data Sedris Standardisation Cell; Synthesis environmental data, by receiving the synthetic environment data composed section synthetic environment Modelling and calculation unit and send, according to SEDRIS standard, is changed, stored in Sedris synthetic environment database after converting more by synthetic environment data Sedris Standardisation Cell; Synthetic environment is played up and visualization reads the synthetic environment data of Sedris standard format under current artificial tasks from Sedris synthetic environment database, utilize dynamic load technology according to emulation propelling process progressively by synthetic environment Data import in visual scene, and the visual scene after loading is played up. Being described as follows of every part:
(1) synthetic environment Modelling and calculation unit
Synthetic environment Modelling and calculation unit comprises material classification submodule block, infrared characteristic calculates module, electromagnetic property calculates module, atmosphere data generation module and particle effect module;
1, material classification submodule block
As shown in Figure 2, material classification submodule block mainly completes the infrared characteristic model of scene and target and the foundation of electromagnetic property model. The foundation of the infrared characteristic model of scene and target is specially:
(1) satellite image map of scene and target or take photo by plane image or target texture pinup picture is obtained, as the input of material classification;
(2) to input pinup picture or picture carry out image analysis, being incorporated into by the material (such as ocean, lake ripple, river etc.) with identical material properties on image or pinup picture is a class, and with broken line, corresponding image-region is marked on image or pinup picture, the graphic information of unlike material attribute object carries out classification store, thus form multiple material mask file respectively;
(3) information of combining image mask file and infrared Materials Library, for the classification of different materials, generates different material coding file (MCM) and material system file (.ms) for the calculating of scene and target infrared characteristic; Material coding file and material system file are referred to as the infrared characteristic model of scene and target.
Infrared Materials Library comprises the infrared material file of kind more than 200, and each material file shows specified material shortwave specific absorption and long wave specific absorption at different temperatures, at present for commercial product can be bought.
Electromagnetic property model process of establishing is as follows:
First, the CAD geometric model of the objective body of foundation and scene model; By objective body and scene have identical material Region dividing out; For the different zones divided in conjunction with electromagnetism Materials Library, the electromagnetism material information of different zones is gathered for corresponding electromagnetic property file, as the input file that follow-up electromagnetic property calculates;
Electromagnetism Materials Library comprises more than 20 kind of electromagnetism material file, and each material file shows the electromagnetic propertys such as the specific inductivity of specified material, magnetic permeability, specific inductivity, at present for commercial product can be bought.
2, particle effect module
Particle properties parameter is arranged by particle effect module according to emulation demand, generates infrared special efficacy model;
This step can utilize the infrared special efficacy storehouse in JRM business software, particle properties parameter is arranged by the api interface in infrared special efficacy storehouse, completes the foundation of infrared special efficacy model.
First, by the special efficacy shape of different to tail flame, blast, smog in the infrared special efficacy storehouse in JRM business software etc. particle and moving law with*.osg form stores, and forms different particle shape file (such as smoke particle shapes file is blacksmoke.osg, dust particle shape file is dust.osg etc.); Physical property according to actual special efficacy, arranges particle properties parameter, comprises special efficacy type, particle kind, oxygen concentration, rate of combustion, available fuel cumulative volume, temperature, wind speed etc., and forms particle physics characteristic parameter table, with*.pip file preserves (particle physics Parameter File PIP), obtains infrared special efficacy model.
3, atmosphere data generation module
It is three-dimensional with reference to the air source data in atmospheric model that atmosphere data generation module obtains NRLMSISE-00, and air source data carry out the atmosphere data being converted under the different heights in units of longitude and latitude of time and system of coordinates;
(1) choose disclosed NRLMSISE-00 three-dimensional with reference to atmospheric model, call the Support Library of SEDRIS standard, utilize the gtd7 (structnrlmsise_input in this Support Library*input,structnrlmsise_flags*flags,structnrlmsise_output*Output) interface function directly obtains above-mentioned three-dimensional with reference to the air source data in atmospheric model;
(2) adopt C/C++ language substantially to run time management and calculating in storehouse and support mktime and the gmtime function of function, being converted to by air source data time form in seconds (using time_t type to represent), in SEDRIS, the time of YYYYMMDDHHMMSS form represents (using SE_Time_Value type to represent);
(3) air source data are carried out the atmosphere data being converted under the different heights in units of longitude and latitude of time and system of coordinates.
In order to improve resolving power, utilize the mode of linear interpolation to obtain precision higher data the atmosphere data in step (3), the atmosphere data of generation is exported to synthetic environment data Sedris Standardisation Cell and carries out data conversion.
4, infrared characteristic calculates module
Such as Fig. 3, infrared characteristic calculating module mainly completes infrared particle effect calculating (such as flame, tail cigarette and smog etc.) and scene and target infrared characteristic and calculates. Scene and target infrared characteristic calculate and utilize third party software Modtran4.0 to realize, and concrete steps are: first, utilize Modtran4.0API to set up atmospheric model; Use ModtranGUI to set up the configuration of atmospheric model, and it is mcd file by Set up-conservancy; Resolve mcd file to, in air configuration structure body, in the ssEnvironment class in Modtran4.0API, defining relevant structure and enumerate type, thus the atmospheric radiation decay factor in corresponding mcd; Utilizing the ssSensor sensor structure in Modtran4.0API to arrange the wavelength of infrared sensor, Altitude structure arranges the height of sensor; According to sensor parameters (ssSensor sensor structure comprises), target height, the distance of sensor and target, utilize Modtran4.0API calculate air transmitance, air path radiation, atmospheric scattering radiation, obtain the ir radiation data under different spectral coverage;
Read the particle physics Parameter File PIP that particle effect module is set up, and call the atmospheric attenuation factor by Modtran4.0API, call the api interface in JRM and carry out anomalous integral iterative computation, calculate radiation and the scattering of special efficacy, utilize the ssSensor sensor in Modtran4.0API and Altitude structure to arrange according to above-mentioned same method, obtain the infrared special effects data under different spectral coverage;
Calculation result is exported to synthetic environment data Sedris Standardisation Cell and carries out data conversion.
5, electromagnetic property calculates module
Electromagnetic property calculates module and mainly completes electromagnetic propagation characteristic (electromagnetic data under different spectral coverage) calculating and the electromagnetic characteristic of the goal is calculated.
Such as Fig. 4, the concrete steps of electromagnetic propagation property calculation are: first, complete scene and target is wanted to determine writing of configuration file XML file, so that it is determined that equipment information and the scene terrain informations such as the equipment position of the electromagnetism equipment such as radar, equipment frequency, plant capacity, facility switching machine time, equipment moving track; According to the correlation parameter in XML file, in conjunction with electromagnetic propagation models such as moving window FDTD and UrbanCanyon, completed the calculating of the electromagnetic propertys such as electromagnetic power covering, path loss, angle of arrival, time delay by time-domain finite difference method (FDTD), calculation result is exported to synthetic environment data Sedris Standardisation Cell and carries out data conversion.
Such as Fig. 5, the concrete steps of the electromagnetic characteristic of the goal is calculated are: first, obtain the cad model of respective objects from synthetic environment database; Completing scene and target is wanted to determine writing of configuration file XML file, file comprises radar information and cad model information; Resolve configuration file XML file, obtain the equipment position of electromagnetism equipment, plant capacity and the distance of equipment and target and the CAD profile nature of target; Method of finite difference (FDTD) electromagnetic calculation is adopted directly maxwell equation group to be carried out discretize, by mesh generation mode, target is carried out spatial spreading, each space grid demarcates different material properties, thus calculate the space distribution situation of target RCS, obtain the data of the party's upwards target RCS in conjunction with radar line-of-sight angle, calculation result is exported to synthetic environment data Sedris Standardisation Cell and carries out data conversion.
(2) synthetic environment data Sedris Standardisation Cell
Synthesis environmental data, by receiving the synthetic environment data composed section synthetic environment Modelling and calculation unit and send, according to SEDRIS standard, is changed, stored in Sedris synthetic environment database after converting more by synthetic environment data Sedris Standardisation Cell; Synthetic environment database uses the several data in SQLServer storing virtual test synthetic environment.
The step that synthesis environmental data is changed by synthetic environment data Sedris Standardisation Cell is as follows:
(1) according to the expression model (DRM) in SEDRIS standard, the synthetic environment data received are combined again;
(2) Spatial reference model (SRM) is utilized to define the reference coordinate of environmental objects, under the synthetic environment data after step (1) being combined are transformed into above-mentioned reference frame;
(3) environment for use data encoding convention (EDCS) describes the attribute of the ir radiation data in the rear synthetic environment data of step (2) process and special effects data, electromagnetic data and atmosphere data;
(4) data after step (3) being processed preserve as STF formatted file.
(5) by meet SEDRIS standard after converting synthetic environment data stored in Sedris synthetic environment database
(3) synthetic environment is played up and visualization
Before emulation starts, synthetic environment is played up and visualization downloads the synthetic environment data needed for emulation from Sedris synthetic environment database, and the satellite geographic information data in conjunction with download, according to emulation sight, it is divided into some data packets; In simulation process, utilize dynamic load technology, according to emulation propelling process, progressively above-mentioned some data packets are loaded in visual scene and complete playing up of visual scene. The dynamic load process implementation step of synthetic environment data and satellite geographic information data is as follows:
(1) from the VR-theworld database MAK company official website, download the high precision satellite geographic information data in target scene area, by from the satellite geographic information database of synthetic environment data and download according to simulation process propelling order, lower for the different scene synthetic environment data to be loaded and geographic information data are divided into different data packets, are stored in hard disc of computer;
(2) preliminary stage of preparation started in emulation, is loaded in computer internal memory by disposable for all data packets in hard disc of computer;
(3) along with the propelling of emulation and the change of scene, progressively the corresponding data bag in internal memory is loaded in visual scene.
Synthetic environment is played up and the visual scene after loading is played up and comprised infrared and electromagnetism and play up two portions by visualization;
Wherein, infrared render process is as follows:
(1) determine unit grey scale numerical value, such as, radiation value A is defined as unit radiation value 1; The difference degree according to the radiation value emulated between each scene and target of choosing of radiation value A determines, the difference degree such as radiation value between each scene and target is big, then A should choose little numerical value; As between each scene and target, the difference degree of radiation value is little, then A should choose big numerical value.
(2) ir radiation data in the synthetic environment data of loading and grey scale numerical value are carried out scale operation, obtain the gray-scale value that different ir radiation data is corresponding; Such as the radiation value B and unit grey scale A of automobile metal car body in scene are carried out scale operation (B/A=C), obtain the gray-scale value C of automobile metal car body.
(3) according to above-mentioned gray-scale value, generate gray-scale map, namely complete the infrared image of scene and target and the visual of infrared special efficacy; Such as, the grey scale of automobile metal car body is C, the grey scale of tire is D, when then showing in gray-scale map, the greyscale color of automobile metal car body is dark, and the greyscale color of doughnut is shallow, carries out gray-scale value and the conversion of gray-scale map display according to above method, just constitute a complete gray-scale map.
Electromagnetism render process is as follows:
The first step, arranges distinct colors for different electromagnetism intensities; Such as, when electromagnetism intensity reaches A, middle represent by scarlet visual, when electromagnetism intensity reaches B, middle red represent with shallow visual; The red depth degree of electromagnetism intensity between [AB] is distinguished, and more color close to representative is more dark with A value, and more color close to representative is more shallow with B value.
2nd step, according to the electromagnetic data in the synthetic environment data loaded, loads corresponding color in the visual scene loaded; Such as, in visual scene, according to the electromagnetism intensity around radar, adhering to different colors, electromagnetism intensity determines kind and the depth of color, and the spatial distribution scope of electromagnetic data determines that color is at space adhering zone.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (4)
1. Multi-spectral-coversynthetic synthetic environment simulation system, it is characterised in that: comprise synthetic environment Modelling and calculation unit, synthetic environment data Sedris Standardisation Cell and synthetic environment is played up and visualization;
Synthetic environment Modelling and calculation unit, according to treating that artificial tasks completes that air, scene and target be infrared and the modeling of electromagnetic property, namely sets up the infrared characteristic model of atmospheric model, scene and target, scene and the electromagnetic property model of target, infrared special efficacy model; The infrared characteristic model of the scene set up and target carries out atmospheric heat transmission effects calculating and scene and target thermal radiation calculate, obtain the ir radiation data under different spectral coverage; Infrared special efficacy model is carried out scene special effect scattering and radiation characteristic calculating, obtains the infrared special effects data under different spectral coverage; The electromagnetic property model of the scene set up and target is carried out electromagnetic propagation property calculation and the calculating of target electromagnetic reflection characteristic, obtains the electromagnetic data under different spectral coverage and target electromagnetic characteristic data; Read the atmosphere data under the different heights of atmospheric model generation, the atmosphere data under the ir radiation data under different spectral coverage and special effects data, electromagnetic data, target electromagnetic characteristic data and different heights is referred to as synthetic environment data and is sent to synthetic environment data Sedris Standardisation Cell;
Synthesis environmental data, by receiving the synthetic environment data composed section synthetic environment Modelling and calculation unit and send, according to SEDRIS standard, is changed, stored in Sedris synthetic environment database after converting more by synthetic environment data Sedris Standardisation Cell;
Synthetic environment is played up and visualization reads the synthetic environment data of Sedris standard format under current artificial tasks from Sedris synthetic environment database, utilize dynamic load technology according to emulation propelling process progressively by synthetic environment Data import in visual scene, and the visual scene after loading is played up;
Described synthetic environment Modelling and calculation unit comprises material classification submodule block, infrared characteristic calculates module, electromagnetic property calculates module, atmosphere data generation module and particle effect module;
Material classification submodule block is to the scene and the target satellite image map that obtain or takes photo by plane image or target texture pinup picture is classified according to material properties, for different classification, generate different material coding file and material system file as the infrared characteristic model of scene and target; Simultaneously according to CAD geometric model and the scene model of objective body, the region that objective body and scene have identical material is divided; The electromagnetism material information of different zones is gathered for corresponding electromagnetic property file is as the electromagnetic property model of scene and target;
Particle properties parameter is arranged by particle effect module according to emulation demand, generates infrared special efficacy model;
It is three-dimensional with reference to the air source data in atmospheric model that atmosphere data generation module obtains NRLMSISE-00, and air source data carry out the atmosphere data being converted under the different heights in units of longitude and latitude of time and system of coordinates;
Infrared characteristic calculates the atmospheric radiation decay factor that module encodes file and material system file and acquisition according to different materials, obtains the ir radiation data under different spectral coverage; Simultaneously according to the infrared special effects data under infrared special efficacy model generation different spectral coverage;
Electromagnetic property calculates module according to treating simulated environment, the configuration equipment position of electromagnetism equipment, equipment frequency, plant capacity, facility switching machine time, equipment moving trace information and scene terrain information, generate an XML configuration file, in conjunction with the electromagnetic property file of above-mentioned different zones, generate the electromagnetic data under different spectral coverage; The CAD 3D model generation target property XML configuration file of the distance combining target of the equipment position of configuration electromagnetism equipment, plant capacity and equipment and target simultaneously, and then generate target radar echo area and target electromagnetic characteristic data.
2. Multi-spectral-coversynthetic synthetic environment simulation system according to claim 1, it is characterised in that: the step that synthesis environmental data is changed by described synthetic environment data Sedris Standardisation Cell is as follows:
(1) according to the expression model in SEDRIS standard, the synthetic environment data received are combined again;
(2) reference coordinate of Spatial reference model definition environmental objects is utilized, under the synthetic environment data after step (1) being combined are transformed into above-mentioned reference frame;
(3) environment for use data encoding convention describes the attribute of the ir radiation data in the rear synthetic environment data of step (2) process and special effects data, electromagnetic data and atmosphere data;
(4) data after step (3) being processed preserve as STF formatted file.
3. Multi-spectral-coversynthetic synthetic environment simulation system according to claim 1, it is characterised in that: described synthetic environment is played up and visualization utilizes dynamic load technology according to emulating propelling process progressively by as follows for performing step in synthetic environment Data import to visual scene:
(1) download the satellite geographic information data of high precision, the data under different scene are stored into hard disc of computer according to simulation process by the satellite geographic information database of synthetic environment data and download, obtain multiple independent data packet;
(2), when emulation starts, it is loaded in internal memory by disposable for all data packets in hard disc of computer;
(3) along with the propelling of emulation and the change of scene, progressively the corresponding data bag in internal memory is loaded in visual scene.
4. Multi-spectral-coversynthetic synthetic environment simulation system according to claim 1, it is characterised in that: described playing up comprises infrared and electromagnetism and plays up two portions;
Wherein, infrared render process is as follows:
(1) grey scale numerical value is determined;
(2) ir radiation data in the synthetic environment data of loading and grey scale numerical value are carried out scale operation, obtain the gray-scale value that different ir radiation data is corresponding;
(3) according to above-mentioned gray-scale value, generate gray-scale map, namely complete the infrared image of scene and target and the visual of infrared special efficacy;
Electromagnetism render process is as follows:
The first step, arranges distinct colors for different electromagnetism intensities;
2nd step, according to the electromagnetic data in the synthetic environment data loaded, loads corresponding color in the visual scene loaded.
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