CN111768653B - ADS-B test data simulation method - Google Patents
ADS-B test data simulation method Download PDFInfo
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- CN111768653B CN111768653B CN202010553401.5A CN202010553401A CN111768653B CN 111768653 B CN111768653 B CN 111768653B CN 202010553401 A CN202010553401 A CN 202010553401A CN 111768653 B CN111768653 B CN 111768653B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G5/00—Traffic control systems for aircraft, e.g. air-traffic control [ATC]
- G08G5/0004—Transmission of traffic-related information to or from an aircraft
- G08G5/0013—Transmission of traffic-related information to or from an aircraft with a ground station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3912—Simulation models, e.g. distribution of spectral power density or received signal strength indicator [RSSI] for a given geographic region
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Abstract
The invention discloses a method for simulating ADS-B test data, which comprises the following steps: drawing data to perform target simulation; calculating flight plan state and target position and speed information according to the flight plan and the simulation time, and sending a flight dynamic telegraph; calculating the high-precision time of receiving the same target ADS-B signal by different ground stations; and performing ADS-B ground station and radar simulation to generate the associated radar track and ADS-B track. The invention can improve the automation degree of the test and the coverage rate of the test case to the standard.
Description
Technical Field
The invention relates to an ADS-B technology, in particular to a method for simulating ADS-B test data.
Background
With the development of the ADS-B technology and the national construction of the ADS-B system by civil aviation, higher requirements are provided for the test of the ADS-B system. The ADS-B system is a brand-new monitoring system, and is different from a radar in terms of working principle, working mode, operation flow and convenience of data characteristics. Therefore, the original radar data simulator cannot meet the requirements of ADS-B system function and performance test.
According to the traditional test method, ADS-B flight path and radar flight path are simulated through different simulators, each simulator works independently, a plurality of simulators need to be set in each test process, target flight paths related to the ADS-B, the radar and a flight plan cannot be generated, and high-precision time scale information cannot be simulated. The coverage rate of the test cases to the standard is low, and the test automation degree is low.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the ADS-B test data simulation method which can improve the automation degree of the test and the coverage rate of the test case to the standard.
The purpose of the invention is realized by the following technical scheme.
A method for simulating ADS-B test data comprises the following steps:
carrying out target simulation according to the flight plan data;
calculating flight plan state and target position and speed information according to the flight plan and the simulation time, and sending a flight dynamic telegraph;
calculating the high-precision time of receiving the same target ADS-B signal by different ground stations;
and performing ADS-B ground station and radar simulation to generate the associated radar track and ADS-B track.
The target simulation is carried out based on a flight plan, and specifically comprises the following steps:
according to the simulation time, the state judgment of the take-off, landing and the like of the target is carried out by combining with the target flight plan information, and meanwhile, the current position, height, speed and course of the target are calculated according to the waypoint, passing time and passing speed information in the flight plan; and sending a flight dynamic telegram according to the change of the target state.
Updating the flight plan state according to time specifically comprises:
judging whether the current simulation time is greater than the takeoff time set in the target flight plan: when the simulation time is less than or equal to the takeoff time, the state is set to be 'waiting'; setting the flight plan state to be in a 'landing' state when the current simulation time is more than or equal to the landing time; and updating the state of the flight plan to be in a 'take-off' state when the current time is between the take-off time and the landing time.
The method for sending the corresponding flight telegrams according to the change of the flight states specifically comprises the following steps:
and judging the current state and the last period state of the flight plan, and sending a flight dynamic telegram by using a preset template according to the state change. The specific mode is as follows: the state is changed from 'waiting' to 'taking off', and 'take-off and flight report' is sent; the state is changed from 'take-off' to 'landing', and a 'landing report' is sent.
The calculating of the high-precision time of different ground stations receiving the same target ADS-B signal specifically comprises the following steps:
and calculating the distance between the target and each ground station, calculating the time of the signal reaching the ground station, and performing time difference positioning through high-precision time difference of reaching different ground stations.
According to the route string information in the flight plan, calculating the current motion state of the target, specifically comprising the following steps:
when the target state is a takeoff state, calculating the current position, height and speed information of the target according to the current time, the route point, the passing point time and the passing point speed in the planned route string to generate target simulation data; the target data includes: location, velocity, secondary code, flight number, 24-digit airplane address code, and SPI of the target.
Simultaneously, the ADS-B track and the radar track which are correlated with each other are simulated, and the method specifically comprises the following steps:
and simultaneously performing ADS-B ground station simulation and radar simulation on each target to generate an ADS-B flight path and a radar flight path, wherein the generated ADS-B flight path, the radar flight path and the flight plan can be correlated.
The ADS-B ground station state information can be simulated, and the method specifically comprises the following steps:
when the ADS-B track is simulated, the state data is simulated according to the working state of the ground station, and the contents comprise: identification number, time, ground station status, service configuration, and service status.
Compared with the prior art, the invention has the advantages that: the method judges the target flight state and generates simulated target data according to the flight plan, and generates the ADS-B ground station track and the secondary radar track by using the ADS-B ground station simulation model and the radar simulation model. The generated radar track may be associated with the ADS-B track and the flight plan for verification of the ADS-B track. The ADS-B ground station based on the flight plan and the radar data simulation method are adopted, the ADS-B flight path and the radar flight path related to the flight plan can be generated, the data are used for testing the ADS-B system, the coverage rate of test cases can be improved, the automation degree of testing is improved, manual operation in the testing process is simplified, and the testing efficiency is improved.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of generating target data based on flight plan information;
FIG. 3 is a flow chart of determining and updating flight plan status;
FIG. 4 is a flow chart of ADS-B data simulation;
FIG. 5 is a flow chart of radar data simulation;
Detailed Description
The invention is described in detail below with reference to the drawings and specific examples.
A method for simulating ADS-B test data can be realized by a terminal. The terminal can be a server, a desktop computer, a notebook computer, etc., and a system program and an application program are installed in the terminal. When a user uses a terminal, the method provided by the embodiment of the invention can be adopted to simulate ADS-B data. The simulated data can be sent to the ADS-B system for system testing.
As shown in fig. 1, the process flow may include the following steps:
step 1: and acquiring the ground station and radar configuration information.
And acquiring configuration information of the ADS-B ground station and the radar in the running process of the application program. The configuration information of the ADS-B ground station mainly comprises: name of ground station, SAC, SIC, ground station location, coverage, data period, output data format, data output port, etc. The configuration information of the radar mainly comprises: radar station number, position, detection range, system error, random error, period, output data format and output address port. Configuration information of the ground station and the radar is used for subsequent sensor data simulation.
Step 2: flight plan information is acquired.
In the running process of the application program, reading the flight plan information of the simulation target recorded in advance, wherein the flight plan mainly comprises the following contents: flight number, 24-digit address code, secondary code, departure time, landing time, departure airport, landing airport, and route string. Wherein the route cluster includes: waypoint names, location, transit speed and altitude, etc.
And step 3: target data is generated from the flight plan information.
In the running process of the application program, the state judgment of the take-off state, the landing state and the like of the target is carried out according to the simulation time and the target flight plan information, and meanwhile, the current position, the height, the speed and the course of the target are calculated according to the information of the waypoint, the passing time, the passing speed and the like in the flight plan. And transmitting the flying dynamic telegrams (the flying telegrams, the landing telegrams and the like) according to the change of the target state. And generating target simulation data for sensor simulation. The flow is shown in fig. 2.
Step 3.1: obtaining simulation time
And calculating the current simulation time according to the simulation starting time and the simulation step length.
Step 3.2: determining and updating flight plan states
And according to the current simulation time and the take-off and landing time in the flight plan. And judging the current state of the target and updating the flight plan state. The procedure is shown in figure 2.
Step 3.2.1: judging whether the time is greater than the takeoff time
And judging whether the current simulation time is greater than the takeoff time set in the target flight plan. If yes, step 323 is performed, and if no, step 322 is performed.
Step 3.2.2: the status is set to "wait"
The status of the flight plan is updated to a "wait" status.
Step 3.2.3: judging whether the time is greater than the landing time
And judging whether the current simulation time is greater than the landing time set in the target flight plan. If yes, step 325 is performed, and if no, step 324 is performed.
Step 3.2.4: the state is set as take-off "
The current time is between the takeoff time and the landing, and the state of the flight plan is updated to a 'takeoff' state.
Step 3.2.5: the state is set as 'falling to the ground'
And setting the flight plan state to be in a 'landing' state when the current time is greater than the landing time.
Step 3.3: transmitting flight telegrams according to state changes
And judging the current state and the last period state of the flight plan, and sending a flight dynamic telegram by using a preset template according to the state change. The specific mode is as follows: the state is changed from 'waiting' to 'taking off', and 'take-off and flight report' is sent; the state is changed from 'take-off' to 'landing', and a 'landing newspaper' is sent "
Step 3.4: generating target simulation data
When the target state is a takeoff state, the current position, height, speed and other information of the target are calculated according to the current time and the planned route string information, and target simulation data are generated. The target data includes: location, speed, secondary code, flight number (call sign), 24-digit airplane address code, and SPI of the target.
And (3) receiving the target simulation data generated in the step (3) according to the configuration information of the ADS-B ground station, and generating ADS-B track data and ADS-B state data through ground station simulation. The specific steps are shown in fig. 4.
Step 4.1: obtaining ground station configuration and status information
Configuration information of the ground station is obtained. The method mainly comprises the following steps: the name of the ground station, SAC, SIC, the position of the ground station, the coverage, the data period, the output data format, the data output port, the on-off state and the like. And if the ADS-B state is normal, performing simulation.
Step 4.2: judging whether the target is in the detection range
Judging whether the target is in the detection range of the ADS-B ground station according to the position, the detection range and the target position of the ADS-B ground station, and if not, quitting
Step 4.3: calculating high precision time data
And according to the time of target simulation and the distance between the target and the ADS-B ground station, calculating the electromagnetic wave transmission time by dividing the distance by the electromagnetic wave transmission rate, and calculating the high-precision time of the ground station for receiving signals.
Step 4.4: and generating ADS-B track data and state data.
And generating ADS-B track and state data according to the target simulation data and the ground station simulation model. The track content comprises: data source identification, location information reception time, target report description, target address, quality factor, WGS-84 coordinate based location information, aircraft operating state, transmitter type, geometry altitude, flight level, barometric vertical rate (climb-descent rate), geographic vertical rate (climb-descent rate), ground motion vector (ground speed), target identification, target state, and high accuracy time at which the target report is received. The status data includes: identification number, time, ground station status, service configuration, and service status.
Step 4.5: sending data on designated port
And transmitting the flight path data according to the transmitting mode, the transmitting address and the port configured by the ground station. ADS-B track output format adopts ASTERIX CAT021, and status information adopts ASTRIX CAT023 format.
And 5: radar data simulation
And (3) receiving the target simulation data generated in the step (3) according to the configuration information of the radar, and simulating to generate radar track data, wherein the radar track generated by simulation adopts MH4008 and ASTERIX CAT048 formats. The specific steps are shown in fig. 5.
Step 5.1: obtaining a radar current sector
And calculating the current scanning sector of the radar according to the number of sectors in the radar configuration, the scanning period and the simulation time.
Step 5.2: judging whether the target is in the sector range
And interpolating or extrapolating the target simulation data to the current simulation time, calculating whether the target is in the range of the sector or not according to the current sector of the radar and the detection range of the radar, and if so, executing 5.3, otherwise, exiting.
Step 5.3 Generation of Radar track data
And generating and updating a radar track of the target according to the current target simulation data, adding a system error and a detection error, and filtering the track. The track content comprises: station number, batch number, secondary code, longitude and latitude, height, speed and other information.
Step 5.4 sending data according to the designated port
And sending the analog radar data to the designated address and the port according to the configured sending mode and the configured sending port.
Claims (8)
1. A method for simulating ADS-B test data is characterized by comprising the following steps:
carrying out target simulation according to the flight plan data;
calculating flight plan state and target position and speed information according to the flight plan and the simulation time, and sending a flight dynamic telegraph;
calculating the high-precision time of receiving the same target ADS-B signal by different ground stations;
performing ADS-B ground station and radar simulation to generate a related radar track and an ADS-B track;
the ADS-B track generation method comprises the following steps: acquiring configuration and state information of a ground station, and if the ADS-B state is normal, performing simulation;
judging whether the target is in the detection range: judging whether the target is in the detection range of the ADS-B ground station according to the position, the detection range and the target position of the ADS-B ground station, and quitting if the target is not in the detection range;
calculating high-precision time data: according to the time of target simulation and the distance between the target and the ADS-B ground station, calculating the transmission time of the electromagnetic waves by dividing the distance by the transmission rate of the electromagnetic waves, and calculating the high-precision time of signals received by the ground station;
generating ADS-B track data and state data: generating ADS-B track and state data according to the target simulation data and the ground station simulation model;
sending data according to the designated port: transmitting flight path data according to a transmitting mode, a transmitting address and a port configured by a ground station;
generating the associated ADS-B track includes the steps of:
obtaining a current sector of the radar: calculating the current scanning sector of the radar according to the number of sectors, the scanning period and the simulation time in the radar configuration;
judging whether the target is in the sector range: interpolating or extrapolating the target simulation data to the current simulation time, calculating whether the target is in the range of the sector according to the current sector of the radar and the detection range of the radar, and exiting if the target is not in the range;
and (3) generating radar track data: generating and updating a radar track of a target according to current target simulation data, adding a system error and a detection error, and performing track filtering;
sending data according to the designated port: and sending the analog radar data to the designated address and the designated port according to the configured sending mode and the configured sending port.
2. The ADS-B test data simulation method of claim 1, wherein the target simulation is performed based on a flight plan, specifically comprising:
according to the simulation time, the taking-off and landing states of the target are judged by combining with the target flight plan information, and meanwhile, the current position, height, speed and course of the target are calculated according to the information of the waypoint, the passing time and the passing speed in the flight plan; and transmitting the flight dynamic telegram according to the change of the target state.
3. An ADS-B test data simulation method according to claim 1, wherein updating the flight plan state according to time specifically includes:
judging whether the current simulation time is greater than the takeoff time set in the target flight plan: when the simulation time is less than or equal to the takeoff time, the state is set to be 'waiting'; setting the flight plan state to be in a 'landing' state when the current simulation time is more than or equal to the landing time; and updating the state of the flight plan to be in a 'takeoff' state when the current time is between the takeoff time and the landing time.
4. An ADS-B test data simulation method according to claim 1, wherein sending a corresponding flight telegram according to a change in a flight status specifically includes:
judging the current state of the flight plan and the state of the last period, sending a flight dynamic telegram by using a preset template according to the state change,
the specific mode is as follows: the state is changed from 'waiting' to 'taking off', and 'take-off and flight report' is sent; the state is changed from 'take-off' to 'landing', and a 'landing report' is sent.
5. An ADS-B test data simulation method according to claim 1, wherein the calculating of the high precision time for different ground stations to receive the same target ADS-B signal specifically comprises:
and calculating the distance between the target and each ground station, calculating the time of the signal reaching the ground station, and performing time difference positioning through high-precision time difference of reaching different ground stations.
6. The ADS-B test data simulation method according to claim 1, wherein calculating a current motion state of the target according to the air route string information in the flight plan specifically comprises:
when the target state is a takeoff state, calculating the current position, height and speed information of the target according to the current time, the route point, the passing point time and the passing point speed in the planned route string to generate target simulation data; the target data includes: location, velocity, secondary code, flight number, 24-digit airplane address code, and SPI of the target.
7. The method for ADS-B test data simulation according to claim 1, wherein the simultaneous simulation of the ADS-B track and the radar track associated with each other specifically comprises:
and simultaneously performing ADS-B ground station simulation and radar simulation on each target to generate an ADS-B flight path and a radar flight path, wherein the generated ADS-B flight path, the radar flight path and the flight plan can be correlated.
8. An ADS-B test data simulation method according to claim 1, capable of simulating ADS-B ground station status information, specifically comprising:
when the ADS-B track is simulated, the state data is simulated according to the working state of the ground station, and the contents comprise: identification number, time, ground station status, service configuration, and service status.
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