Device signal level simulation integrated environment construction carrier platform

Abstract

The application discloses a device signal level simulation integrated environment construction carrier platform, which can improve simulation efficiency, device signal level simulation process and result fidelity. The application is realized through the following technical means: a modeling and scene management unit establishes a carrier platform and a functional sensor model based on a signal level of a scene, connects a radio frequency signal interface of a semi-physical radio frequency system or device to a radio frequency signal interface of a multifunctional signal modulation device, and forms a radio frequency closed loop; a simulation control and visual unit loads a scenario, generates time sequence data of track points of each carrier platform, deduces a simulation process, and distributes the scenario, the track points of the carrier platform and simulation clock data to each component unit; an environment simulation unit internally arranges electromagnetic simulation calculation software to calculate corresponding transmission time delay, phase, Doppler frequency shift and power attenuation modulation parameters, and sends the parameters to the multifunctional signal modulation device; and a simulation function unit calls a bottom layer driving code to send function results and state data through Ethernet.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radio frequency signal simulation modeling, in particular to a device signal level simulation integrated environment construction carrier platform for a semi-physical radio frequency system or device. BACKGROUND

[0002] With the continuous improvement of hardware technology, system theory, graphics technology, computer technology and modeling technology, radio frequency systems or devices and simulation technology have also developed rapidly. Digital simulation uses a digital model to completely simulate an actual system, and through a system simulation program written to run on a computer, test and obtain test results to verify the scheme and guide design and production, has the advantages of good flexibility, high repeatability, economy, safety, etc., and is widely used in various aspects of civil fields such as power, industrial production and manufacturing, communication, medicine, weather prediction, etc. Compared with digital simulation, semi-physical simulation directly connects part of the physical model or physical model to the simulation loop instead of part of the digital model, which not only improves the credibility of the simulation, but also solves many complex modeling problems existing in the system. At present, the semi-physical simulation laboratory, although it is quite mature for modeling, simulation and evaluation of radio frequency systems or devices. However, the semi-physical signal level simulation system mostly uses a radio frequency target simulator, an environmental signal simulator, etc. as part of the simulation system integrated environment, and is connected to the simulation loop in the form of a pre-set background. The multi-type and multi-style radio frequency signal environment involves more complex systems, and it is difficult to dynamically change according to the changes in the spatial position and the state of the test device and the auxiliary test device in the scene driving process, which greatly affects the fidelity of the simulation process and results. Moreover, there is a lack of convenience and economy. SUMMARY

[0003] The present application provides a device signal level simulation integrated environment construction carrier platform that can improve the design simulation efficiency and the fidelity of the device signal level simulation process and results, aiming at the lack of convenience and economy in the signal level simulation integrated environment construction method in the field of radio frequency signal simulation modeling.

[0004] In order to solve the above problems, the application provides a device signal level simulation integrated environment construction carrier platform, which comprises a modeling and scene management unit for real-time transmission of local area network simulation data based on a UDP communication protocol, a simulation control and visual unit, an environment simulation unit, a simulation function unit, an analysis and evaluation unit and a database, and is connected into a local area network through an Ethernet to realize mutual communication, characterized in that: the modeling and scene management unit establishes a carrier platform and a functional sensor model based on a signal level of a scene, connects a radio frequency signal interface of a semi-physical radio frequency system or device to a radio frequency signal interface of a multifunctional signal modulation device to form a radio frequency closed loop; the simulation control and visual unit loads a scenario, generates time sequence data of each carrier platform track point, deduces a simulation process, and distributes the scenario, the carrier platform track point and simulation clock data to each component unit; the environment simulation unit is internally provided with electromagnetic simulation calculation software and a multifunctional signal modulation device, the electromagnetic simulation calculation software receives the scenario, the carrier platform track point and simulation clock data sent by the simulation control and visual unit, calculates corresponding transmission time delay, phase, Doppler shift and power attenuation modulation parameters, and sends them to the multifunctional signal modulation device; the simulation function unit simulates a single target object from two levels of functional sensors and carrier platforms, receives the scenario, the carrier platform track point and simulation clock data sent by the simulation control and visual unit, loads a carrier platform model according to a mounting relationship between the carrier platform model and the functional sensor, calls a bottom layer driving code, controls corresponding semi-physical radio frequency systems or devices to work, and completes processing of received radio frequency signals, generation of transmitted radio frequency signals, and sending of function results and state data through the Ethernet according to functional requirements.

[0005] Compared with the prior art, the application has the following beneficial effects:

[0006] The modeling and scene management unit for real-time transmission of local area network simulation data based on a UDP communication protocol, the simulation control and visual unit, the environment simulation unit, the simulation function unit, the analysis and evaluation unit and the database are connected into a local area network through an Ethernet to realize mutual communication, a radio frequency signal propagation effect simulation technology based on scene driving is adopted, a simulated target feature can dynamically change with changes in spatial position relationship in a scene deduction process and states of a test device and a test equipment, and a signal level simulation integrated environment is designed based on this, so that the fidelity of a semi-physical radio frequency system or device signal level simulation process and results can be effectively improved.

[0007] The application adopts modeling and scene management unit to establish carrier platform and functional sensor model based on signal level of scene, connects radio frequency signal interface of semi-physical radio frequency system or device to radio frequency signal interface of multi-functional signal modulation device, forms radio frequency closed loop; simulation control and visual unit loads assumption scheme, generates time sequence data of each carrier platform track point, deduces simulation process, distributes assumption scheme, carrier platform track point and simulation clock data to each unit; electromagnetic simulation calculation software of environment simulation unit generates radio frequency signal modulation parameter, and modulates through multi-functional signal modulation device; simulation functional unit simulates single target object, processes radio frequency signal modulated by environment simulation unit according to functional requirement, generates transmitting radio frequency signal; these well-coordinated simulation integrated environment construction platform components can cooperatively connect all functional sensors, carrier platforms, environment elements and the like in scene, carry out information interaction between software and hardware, make simulation design realize fast speed, high simulation reality, convenient debugging, can be used for reproducing whole process of radio frequency signal generation, radiation, reception and processing of radio frequency system or device, and verifying and evaluating function and performance of radio frequency system or device. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a principle schematic diagram of equipment signal level simulation integrated environment construction carrier platform of the application.

[0009] In order to facilitate implementation of the application, the application is further described in detail below in combination with the drawings. DETAILED DESCRIPTION

[0010] Reference Figure 1In the following described exemplary preferred embodiment, a device signal level simulation integrated environment carrier platform is configured, comprising a modeling and scene management unit for real-time transmission of LAN simulation data based on a UDP communication protocol, a simulation control and visual unit, an environment simulation unit, a simulation function unit, an analysis and evaluation unit, and a database, which are connected into a LAN through Ethernet to realize mutual communication, wherein: the modeling and scene management unit establishes a carrier platform and a functional sensor model based on a signal level of a scene, connects a radio frequency signal interface of a semi-physical radio frequency system or device to a radio frequency signal interface of a multifunctional signal modulation device to form a radio frequency closed loop; the simulation control and visual unit loads a scenario, generates time series data of each carrier platform waypoint, deduces a simulation process, and distributes scenario, carrier platform waypoint, and simulation clock data to each component unit; the environment simulation unit is internally provided with electromagnetic simulation calculation software and a multifunctional signal modulation device, the electromagnetic simulation calculation software receives the scenario, carrier platform waypoint, and simulation clock data sent by the simulation control and visual unit, calculates corresponding transmission time delay, phase, Doppler shift, and power attenuation modulation parameters, and sends them to the multifunctional signal modulation device; the simulation function unit simulates a single target object from two levels of functional sensors and carrier platforms, receives the scenario, carrier platform waypoint, and simulation clock data sent by the simulation control and visual unit, loads a carrier platform model according to a mounting relationship between the carrier platform model and the functional sensor, calls a bottom layer driving code, controls corresponding semi-physical radio frequency systems or devices to work, and completes processing of received radio frequency signals, generation of transmitted radio frequency signals, and sending of functional results and state data through Ethernet according to functional requirements.

[0011] The modeling and scene management unit mainly completes model management, test scene and environment setting, deployment and setting, route planning, and scenario management, etc.

[0012] The simulation control and visual unit obtains carrier platform, functional sensor model parameters, target area and environment parameters, carrier platform deployment simulation environment information, and route planning data, etc. from the database, and sends the read scenario data to the simulation function unit and the electromagnetic simulation calculation software internally provided in the environment simulation unit, to complete scenario loading, simulation guidance, clock advancement, situation distribution, and situation display, etc.

[0013] The simulation control and visual unit deduces a simulation process, performs carrier platform spatial six-degree-of-freedom waypoint interpolation according to route planning data and simulation time steps, to form time series data of each carrier platform waypoint.

[0014] The environment simulation unit comprises internally provided electromagnetic simulation calculation software and a multifunctional signal modulation device which receives modulation parameters, modulates received radio frequency signals, and outputs.

[0015] The electromagnetic simulation calculation software receives the scenario data sent by the simulation control and the visual unit, constructs a list of all platforms and transmitters and receivers in the scene according to the carrier platform and functional sensors therein, initializes the propagation model by loading the terrain elevation, topography and weather data according to the target area and environmental parameters, and simulates the propagation effect of the driven radio frequency signal based on the scene by the multi-functional signal modulation device, wherein the propagation effect includes spatial propagation channel, radiation space, distance, angle, and speed.

[0016] The electromagnetic simulation calculation software code is usually written by mixing C / C++ and assembly language, converted into binary format by a software compiler, and finally loaded into the memory of the multi-functional signal modulation device SoC chip. The chip boot starts to call the software code and execute by the ARM core, dynamically calls the database model for simulation calculation, generates the radio frequency signal modulation parameters, and sends them to the multi-functional signal modulation device through signal line communication. The multi-functional signal modulation device down-converts and samples the input radio frequency signal, modulates the sampled data through the FPGA in multiple channels of time delay, phase, Doppler shift and amplitude, modulates the intermediate frequency signal after modulation through digital up-conversion and D / A conversion to generate a radio frequency signal, and finally outputs to the semi-physical radio frequency system or device.

[0017] The electromagnetic simulation calculation software receives the simulation clock, carrier platform track point data and current working parameters of the semi-physical radio frequency system or device sent by the simulation functional unit of each carrier platform model, respectively calculates the distance, angle, radial velocity and propagation loss between each transmitter and receiver, calculates the corresponding transmission time delay, phase, Doppler shift and power attenuation modulation parameters, and sends them to the multi-functional signal modulation device of the environmental simulation unit.

[0018] The multi-functional signal modulation device receives the time delay, phase, Doppler shift and power attenuation modulation parameters sent by the electromagnetic simulation calculation software, modulates the input radio frequency signal of the semi-physical radio frequency system or device in time delay, phase, Doppler shift and power attenuation, and outputs to the radio frequency signal output interface.

[0019] The radio frequency system or device generates the transmitted radio frequency signal according to the functional requirements and outputs it to the radio frequency signal output interface, processes the radio frequency signal of the radio frequency signal input interface, sends the functional processing result to the analysis and evaluation unit, and displays the evaluation result of the simulation according to the evaluation calculation of the evaluation index and the evaluation method designed according to the simulation task requirements. When the radio frequency system or device is powered on or the working parameters change, the current working parameters are sent to the corresponding carrier platform model in the simulation functional unit. The analysis and evaluation unit is optional.

[0020] The database is mainly used for storing carrier platform and functional sensor model parameters, scenario information, environmental area parameters, carrier platform deployment information and route planning data.

[0021] The simulation function unit includes target object 1, target object 2, …, target object N, each target object containing an airborne / shipborne / vehicleborne carrier platform model and a semi-physical radio frequency system or device, and a mounting relationship between the platform and the device, each carrier platform model being mountable with different functional sensors, and the same functional sensor being mountable on different carrier platforms; the simulation control and visual unit receives the current working parameters of the radio frequency system or device sent by the simulation function unit, displays the attitude position of each platform and the beam scanning information of the mounted radio frequency system or device on a map, judges whether the simulation is completed, if the simulation is completed, the simulation is completed, if the simulation is not completed, the simulation time step is added to the current simulation clock, and the simulation process is continued; each carrier platform model receives the scenario, carrier platform track point and simulation clock data sent by the simulation control and visual unit, calls the underlying driving code according to the mounting relationship between the carrier platform model and the functional sensor, controls the corresponding semi-physical radio frequency system or device to work, receives the functional processing result and the current working parameters sent by the radio frequency system or device; the semi-physical radio frequency system or device completes the processing of the received radio frequency signal and generates the transmitted radio frequency signal according to the functional requirements, and sends the functional result and the state data through Ethernet.

Claims

1. A device signal-level simulation integrated environment construction carrier platform, comprising a modeling and scene management unit, a simulation control and visual unit, an environment simulation unit, a simulation function unit, an analysis and evaluation unit, and a database, which are connected to form a local area network via Ethernet to achieve mutual communication, characterized in that: The modeling and scene management unit establishes carrier platform and functional sensor models based on the signal level of the scene, and connects the RF signal interface of the semi-physical RF system or equipment to the RF signal interface of the multi-functional signal modulation device to form an RF closed loop; the simulation control and visual unit loads the scenario, generates time series data of the track points of each carrier platform, deduces the simulation process, and distributes the scenario, carrier platform track points, and simulation clock data to each component unit; the environment simulation unit has built-in electromagnetic simulation calculation software and multi-functional signal modulation device, and the electromagnetic simulation calculation software receives the scenario, carrier platform track points, and simulation clock data sent by the simulation control and visual unit. The corresponding transmission delay, phase, Doppler shift, and power attenuation modulation parameters are calculated and sent to the multi-functional signal modulation device. The simulation function unit simulates a single target object from two levels: functional sensor and carrier platform. It receives the scenario, carrier platform track point, and simulation clock data sent by the simulation control and vision unit. Based on the mounting relationship between the carrier platform model and the functional sensor, it loads the carrier platform model to run, calls the underlying driver code, controls the corresponding semi-physical RF system or device to work, completes the processing of received RF signals and generates transmitted RF signals according to functional requirements, and sends the functional results and status data through Ethernet.

2. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The modeling and scenario management unit completes model management, test scenario and environment settings, deployment and settings, route planning and scenario management.

3. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The simulation control and visual unit obtains the carrier platform, functional sensor model parameters, target area and environmental parameters, carrier platform deployment simulation environment information and route planning data from the database. It then sends the read scenario data to the electromagnetic simulation calculation software built into the simulation function unit and the environment simulation unit to complete the scenario loading, simulation guidance, clock advancement, situation distribution and situation display.

4. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The simulation control and visual unit extrapolates the simulation process. Based on the route planning data, the six-degree-of-freedom space track points of the carrier platform are interpolated according to the simulation time step to form time series data of track points of each carrier platform.

5. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The environmental simulation unit includes built-in electromagnetic simulation calculation software and a multi-functional signal modulation device that receives modulation parameters, modulates the received radio frequency signals, and outputs them.

6. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The electromagnetic simulation calculation software receives the scenario data sent by the simulation control and visual unit, constructs a list of all platforms, transmitters, and receivers in the scene based on the carrier platform and functional sensors, and initializes the propagation model by loading terrain elevation, landform, and weather data according to the target area and environmental parameters. The multi-functional signal modulation device simulates the propagation effect of radio frequency signals based on the scene, and the propagation effect includes several dimensions such as spatial propagation channel, radiation space, distance, angle, and velocity.

7. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The electromagnetic simulation calculation software code is written in a mixture of C / C++ and assembly language. It is converted into binary format by a software compiler and loaded into the memory of the multi-functional signal modulation device SoC chip. When the chip boots up, the ARM core calls and executes the software code, dynamically calls the database model to perform simulation calculations, generates radio frequency signal modulation parameters, and sends them to the multi-functional signal modulation device through signal line communication. The multi-functional signal modulation device down-converts and samples the input radio frequency signal. The sampled data is then modulated by multi-channel time delay, phase, Doppler frequency shift and amplitude through FPGA. The modulated intermediate frequency signal is then digitally up-converted and D / A converted to generate a radio frequency signal, which is finally output to a semi-physical radio frequency system or device.

8. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The electromagnetic simulation calculation software receives the simulation clock, carrier platform track point data and semi-physical radio frequency system or equipment current operating parameters sent by each carrier platform model in the simulation function unit from the simulation control and vision unit. It calculates the distance, angle, radial velocity and propagation loss between each transmitter and receiver, and calculates the corresponding transmission delay, phase, Doppler frequency shift and power attenuation modulation parameters, and sends them to the multi-functional signal modulation device of the environmental simulation unit. The multi-functional signal modulation device receives time delay, phase, Doppler frequency shift, and power attenuation modulation parameters sent by electromagnetic simulation calculation software, modulates the RF signal input to the semi-physical RF system or device with time delay, phase, Doppler frequency shift, and power attenuation, and outputs it to the RF signal output interface.

9. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The radio frequency (RF) system or equipment generates and outputs RF signals to the RF signal output interface according to functional requirements, processes the RF signals at the RF signal input interface, and sends the functional processing results to the analysis and evaluation unit. Based on the simulation task requirements, it uses a specially designed evaluation method to complete the evaluation calculation of evaluation indicators and display the simulation evaluation results. When the RF system or equipment is powered on or its operating parameters change, it sends the current operating parameters to the corresponding carrier platform model in the simulation functional unit. The database is mainly used to store carrier platform and functional sensor model parameters, scenario information, environmental area parameters, carrier platform deployment information, and route planning data.

10. The device signal-level simulation integrated environment construction carrier platform as described in claim 1, characterized in that: The simulation function unit includes: Target Object 1, Target Object 2...Target Object N. Each target object contains an airborne / shipborne / vehicle-mounted platform model and a semi-physical RF system or device, as well as the mounting relationship between the platform and the device. Different functional sensors can be mounted on the same platform, and the same functional sensor can be mounted on different platforms. The simulation control and visualization unit receives the current operating parameters of the RF system or device sent by the simulation function unit, displays the attitude and position of each platform and the beam scanning information of the mounted RF system or device on the map, and determines whether the simulation has been completed. If it has been completed, the simulation is finished. If the simulation is not completed, a simulation time step is added to the current simulation clock to continue the simulation process. Each carrier platform model receives the scenario, carrier platform track points, and simulation clock data sent by the simulation control and visual unit. Based on the mounting relationship between the carrier platform model and the functional sensors, it calls the underlying driver code to control the corresponding hardware-in-the-loop RF system or device to work, and receives the functional processing results and current working parameters sent by the RF system or device. The hardware-in-the-loop RF system or device completes the processing of the received RF signal and generates the transmitted RF signal according to the functional requirements, and sends the functional results and status data through Ethernet.

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