Missile-borne GPS receiver rotation characteristic test system

Abstract

The invention relates to the technical field of missile-borne navigation equipment testing, and discloses a missile-borne GPS receiver rotation characteristic testing system which comprises a rotation simulation module, a GPS signal simulation module, a data acquisition and processing module, an attitude measurement module, a power supply module, an environment simulation module, a calibration module and a system control module. The system control module serves as a core control center. Complex rotation modes such as speed change and angle change can be achieved through the rotation simulation module, the high-precision rotary table guarantees the centering precision through the laser aligner, the locking mechanism is stable and reliable, and the rotation state of ammunition in flight can be accurately reproduced; the GPS signal simulation module supports multi-satellite constellation, frequency-variable and power-variable signal generation, an array antenna accurately controls beam pointing, and GPS signals in different electromagnetic environments can be simulated. The environment simulation module integrates temperature, humidity and vibration control, can realize collaborative simulation of rotation and environment factors, and fully covers the actual working scene of the receiver.

Description

Technical Field

[0001] This invention relates to the field of missile-borne navigation equipment testing technology, specifically a missile-borne GPS receiver rotation characteristic testing system. Background Technology

[0002] During missile-borne GPS receivers, harsh conditions such as high-speed rotation, complex electromagnetic environments, extreme temperature and humidity, and vibration are encountered during missile flight. Their rotational characteristics directly affect navigation and positioning accuracy and reliability. Traditional missile-borne GPS receiver testing systems have numerous shortcomings:

[0003] First, the rotation simulation is limited, only able to achieve uniform rotation at a fixed speed, and cannot simulate the variable speed and direction rotation modes during the flight of the ammunition, resulting in low fit to the test scenario.

[0004] Secondly, the GPS signal simulation is simplified and lacks the ability to simulate multiple satellite systems in a coordinated manner and dynamically adjust the signal quality, making it impossible to reproduce scenarios such as signal attenuation and interference in complex electromagnetic environments.

[0005] Third, the data acquisition is not synchronized. The multi-source test data (rotation state, GPS signal, receiver output, attitude data) lack a unified time reference, and the data correlation is poor, which affects the analysis of test results.

[0006] Fourth, the environmental adaptability is insufficient. It does not integrate environmental simulation modules such as temperature, humidity, and vibration, making it impossible to test the receiver performance under the combined effects of rotation and environmental stress.

[0007] Fifth, the level of intelligence is low, the testing process requires manual intervention, fault diagnosis and calibration depend on professional personnel, and the testing efficiency is low and the error is large.

[0008] Currently, the industry lacks a comprehensive testing system that integrates multi-mode rotation simulation, complex GPS signal generation, multi-source data synchronous acquisition, environmental stress coordination, and intelligent calibration. This makes it difficult to meet the high-precision and multi-scenario testing requirements of missile-borne GPS receivers. There is an urgent need for a full-process, integrated rotation characteristic testing system. Summary of the Invention

[0009] The purpose of this invention is to provide a test system for the rotation characteristics of an airborne GPS receiver, so as to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a test system for the rotation characteristics of an airborne GPS receiver, comprising a rotation simulation module, a GPS signal simulation module, a data acquisition and processing module, an attitude measurement module, a power supply module, an environment simulation module, a calibration module, and a system control module. The system control module serves as the core control hub and establishes bidirectional communication connections via an Ethernet bus with the rotation control submodule of the rotation simulation module, the signal parameter configuration submodule of the GPS signal simulation module, the data analysis submodule of the data acquisition and processing module, and the attitude calculation submodule of the attitude measurement module.

[0011] The system control module sends control commands such as rotation mode, speed, and rotation angle to the rotation control submodule, and receives real-time rotation status feedback from the turntable.

[0012] The system control module sends GPS signal frequency, power, satellite constellation and other parameter configuration instructions to the signal parameter configuration submodule, and receives signal generation status and signal quality data.

[0013] The system control module sends instructions such as data acquisition frequency and analysis algorithm selection to the data analysis submodule, and receives data processing results and error analysis reports.

[0014] The system control module sends instructions such as attitude calculation frequency and filtering parameters to the attitude calculation submodule and receives real-time attitude angle data.

[0015] The system control module establishes a two-way data and command connection with the human-machine interface through the USB / RS232 interface, outputs test parameters, module operating status, data processing results and alarm information to the human-machine interface, and receives user operation commands and test scheme configuration data uploaded by the human-machine interface.

[0016] The GPS receiver data interface of the data acquisition and processing module establishes a one-way data connection with the missile-borne GPS receiver through RS232, USB or Ethernet interface, and receives the positioning, speed measurement and time synchronization data output by the receiver; the high-speed acquisition card establishes a one-way data connection with the angular position sensor of the rotation simulation module, the signal quality analysis unit of the GPS signal simulation module, the inertial measurement unit and tilt sensor of the attitude measurement module through a dedicated data cable, and synchronously acquires multi-source test data; the high-speed acquisition card establishes a two-way data connection with the data storage unit and data analysis submodule through the internal bus to realize data storage and processing;

[0017] The power supply module establishes power supply connections with all power-consuming modules through power distribution lines. The AC regulated power supply and DC switching power supply provide stable power to the drive motor of the rotation simulation module, the signal source host of the GPS signal simulation module, the high-speed acquisition card of the data acquisition and processing module, the inertial measurement unit of the attitude measurement module, the industrial computer and human-machine interface of the system control module. The backup power supply unit is connected in parallel with the main power supply line and is connected to the system control module through a switching switch to receive power supply switching commands.

[0018] Preferably, the rotation control submodule of the rotation simulation module establishes a bidirectional control connection with the drive motor via a control cable, sends speed control signals to the drive motor, and receives status feedback such as motor operating current and temperature; the drive motor is connected to the reduction transmission mechanism via a mechanical transmission structure, and the reduction transmission mechanism is fixedly connected to the table surface of the high-precision turntable to realize power transmission; the laser alignment device of the turntable's table surface centering positioning device establishes a unidirectional data connection with the system control module via a signal cable to upload alignment deviation data; the pneumatic control system of the locking mechanism is connected to the system control module via a control cable to receive clamping / releasing control commands, and the pressure sensor of the locking mechanism establishes a unidirectional data connection with the system control module via a signal cable to upload clamping force data; the angular position sensor of the turntable is connected to the high-speed acquisition card of the data acquisition and processing module via a dedicated data line to upload angular position and angular velocity measurement data.

[0019] Preferably, the signal source host of the GPS signal simulation module establishes a unidirectional signal connection with the antenna radiating unit through an RF cable and outputs GPS RF signals; the signal source host establishes a bidirectional data connection with the signal parameter configuration submodule and the signal quality analysis unit through an internal data bus, receives parameter configuration data and outputs signal quality monitoring data; the signal parameter configuration submodule establishes a bidirectional communication connection with the system control module through an Ethernet bus, receives scene configuration commands and feeds back signal configuration status; the multi-satellite system simulation unit is connected to the signal source host through an internal bus to realize the collaborative generation of multi-system signals; the array antenna of the antenna radiating unit is connected to the signal source host through a phase control line to receive beam pointing control signals and ensure that the signal accurately covers the missile-borne GPS receiver.

[0020] Preferably, the data analysis submodule of the data acquisition and processing module establishes a bidirectional data connection with the data synchronization calibration unit and the error tracing submodule through an internal bus, receives synchronization calibration data and error analysis data, and outputs the processed test results; the data storage unit establishes a bidirectional data connection with the industrial-grade solid-state drive through a SATA interface to realize the reading, writing, and storage of test data; the visualization unit of the data analysis submodule establishes a unidirectional data connection with the human-machine interface through a video interface to output test data charts; and the data synchronization calibration unit establishes a unidirectional data connection with the system control module through a time synchronization line to receive a unified time reference signal and ensure the time consistency of multi-source data.

[0021] Preferably, the inertial measurement unit of the attitude measurement module establishes a bidirectional data connection with the temperature compensation submodule via a signal cable, receives temperature measurement data, and outputs compensated inertial measurement data; the inertial measurement unit and tilt sensor establish a unidirectional data connection with the attitude calculation submodule via a dedicated data line to upload the original measurement data; the attitude calculation submodule establishes a bidirectional data connection with the extended Kalman filter unit via an internal bus to achieve data fusion calculation; the attitude calculation submodule establishes a bidirectional communication connection with the system control module via an Ethernet bus to upload attitude angle calculation results and receive calculation parameter configuration commands; the GPS data fusion interface establishes a unidirectional data connection with the GPS receiver data interface via a communication line to receive GPS positioning and velocity measurement data for fusion calculation.

[0022] Preferably, the control software of the system control module establishes a bidirectional data connection with the test process automation unit and the fault diagnosis submodule through an internal bus, receives automated test schemes and fault diagnosis data, and outputs control commands; the remote control interface establishes a bidirectional communication connection with an external remote control terminal through an Ethernet interface to realize remote command transmission and data feedback; the fault diagnosis submodule establishes a unidirectional data connection with the status monitoring sensors (voltage, current, and temperature sensors) of each module through a signal monitoring line to collect module operating status data for fault identification.

[0023] Preferably, the temperature control unit, humidity control unit, and vibration simulation unit of the environmental simulation module establish a bidirectional communication connection with the system control module through control cables, receive environmental parameter configuration commands, and feed back environmental status data; the temperature control unit and humidity control unit are integrated into the same test chamber structure, and realize the acquisition and control of environmental parameters through internal pipelines and sensors; the vibration simulation unit is connected to the high-precision turntable of the rotation simulation module through a mechanical mounting structure to realize the synergistic effect of vibration and rotation; the environmental simulation module establishes a power supply connection with the power supply module through power distribution lines, receives a stable working power supply, and ensures accurate control of environmental parameters.

[0024] Preferably, the turntable calibration unit of the calibration module establishes a calibration connection with the high-precision turntable of the rotation simulation module through an optical interface, and establishes a bidirectional communication connection with the system control module through a data bus to upload calibration data and receive calibration commands; the signal source calibration unit establishes a calibration connection with the signal source host of the GPS signal simulation module through an RF interface, and connects to the system control module through a data bus to provide feedback on signal calibration results; the attitude measurement calibration unit establishes a calibration connection with the inertial measurement unit and tilt sensor of the attitude measurement module through a mechanical interface, and connects to the system control module through a data bus to upload attitude calibration data; the system control module establishes a bidirectional data connection with the calibration result analysis unit through an internal bus to receive calibration data and generate a calibration report, and automatically adjusts the working parameters of each module according to the calibration results.

[0025] This invention provides a test system for the rotational characteristics of an airborne GPS receiver. It has the following advantages:

[0026] 1. This invention enables complex rotation modes such as variable speed and variable angle through a rotation simulation module. The high-precision turntable ensures centering accuracy through a laser alignment device, and the locking mechanism is stable and reliable, accurately reproducing the rotation state of the ammunition in flight. The GPS signal simulation module supports the generation of signals from multiple satellite constellations with variable frequency and power. The array antenna precisely controls the beam pointing, simulating GPS signals under different electromagnetic environments. The environmental simulation module integrates temperature, humidity, and vibration control, enabling coordinated simulation of rotation and environmental factors, comprehensively covering the actual working scenarios of the receiver.

[0027] 2. This invention uses a high-speed acquisition card to synchronously acquire multi-source data such as rotation status, GPS signal quality, attitude measurement, and receiver output. The data synchronization calibration unit ensures data consistency based on a unified time reference. The data analysis submodule supports flexible selection of multiple algorithms and can conduct multi-dimensional analysis of positioning error, speed measurement accuracy, and time synchronization. Combined with the error tracing function, it can accurately locate receiver performance bottlenecks and provide data support for optimized design.

[0028] 3. This invention uses the system control module as the core hub, which can automatically issue control commands such as rotation mode, signal parameters, and acquisition frequency, and receive status feedback from each module to realize the automated execution of the test process; the human-machine interface supports test scheme configuration, data visualization and fault query, and the remote control interface can realize remote operation. With the fault diagnosis submodule, it can quickly identify module faults and issue alarms, which greatly reduces the cost of manual intervention.

[0029] 4. This invention adopts a modular design, with independent yet collaborative modules for rotation simulation, signal simulation, data acquisition, and environmental simulation, and standardized interfaces. The calibration module can accurately calibrate the turntable, signal source, and attitude measurement unit to ensure test accuracy. The expansion interface supports adding new test items or changing receiver models without modifying the core structure, adapting to the testing requirements of different specifications of missile-borne GPS receivers. At the same time, the backup power supply ensures uninterrupted testing and improves system stability. Attached Figure Description

[0030] Figure 1 This is a flowchart of the system architecture of the present invention;

[0031] Figure 2 This is a flowchart of the rotation simulation module of the present invention;

[0032] Figure 3 This is a flowchart of the GPS signal simulation module of the present invention;

[0033] Figure 4 This is a flowchart of the data acquisition and processing module of the present invention;

[0034] Figure 5 This is a flowchart of the attitude measurement module of the present invention;

[0035] Figure 6 This is an extended flowchart of the system control module of the present invention;

[0036] Figure 7 This is a flowchart of the environment simulation module of the present invention;

[0037] Figure 8 This is a flowchart of the calibration module of the present invention. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0040] Example 1

[0041] A preferred embodiment of the airborne GPS receiver rotation characteristic testing system provided by the present invention is as follows: Figure 1-8 As shown: A test system for the rotation characteristics of an airborne GPS receiver includes a rotation simulation module, a GPS signal simulation module, a data acquisition and processing module, an attitude measurement module, a power supply module, an environmental simulation module, a calibration module, and a system control module. The system control module serves as the core control hub and establishes bidirectional communication connections via an Ethernet bus with the rotation control submodule of the rotation simulation module, the signal parameter configuration submodule of the GPS signal simulation module, the data analysis submodule of the data acquisition and processing module, and the attitude calculation submodule of the attitude measurement module.

[0042] The system control module sends control commands such as rotation mode, speed, and rotation angle to the rotation control submodule, and receives real-time rotation status feedback from the turntable.

[0043] The system control module sends GPS signal frequency, power, satellite constellation and other parameter configuration instructions to the signal parameter configuration submodule, and receives signal generation status and signal quality data.

[0044] The system control module sends instructions such as data acquisition frequency and analysis algorithm selection to the data analysis submodule, and receives data processing results and error analysis reports.

[0045] The system control module sends instructions such as attitude calculation frequency and filtering parameters to the attitude calculation submodule and receives real-time attitude angle data.

[0046] The system control module establishes a two-way data and command connection with the human-machine interface through the USB / RS232 interface, outputs test parameters, module running status, data processing results and alarm information to the human-machine interface, and receives user operation commands and test scheme configuration data uploaded by the human-machine interface.

[0047] The GPS receiver data interface of the data acquisition and processing module establishes a one-way data connection with the missile-borne GPS receiver through RS232, USB or Ethernet interface to receive the positioning, speed measurement and time synchronization data output by the receiver; the high-speed acquisition card establishes a one-way data connection with the angular position sensor of the rotation simulation module, the signal quality analysis unit of the GPS signal simulation module, the inertial measurement unit and tilt sensor of the attitude measurement module through dedicated data lines to synchronously acquire multi-source test data; the high-speed acquisition card establishes a two-way data connection with the data storage unit and data analysis submodule through the internal bus to realize data storage and processing;

[0048] The power supply module establishes power supply connections with all power-consuming modules through power distribution lines. The AC regulated power supply and DC switching power supply provide stable power to the drive motor of the rotary simulation module, the signal source host of the GPS signal simulation module, the high-speed acquisition card of the data acquisition and processing module, the inertial measurement unit of the attitude measurement module, the industrial computer and human-machine interface of the system control module. The backup power supply unit is connected in parallel with the main power supply line and is connected to the system control module through a switching switch to receive power supply switching commands.

[0049] The temperature control unit, humidity control unit, and vibration simulation unit of the environmental simulation module establish a two-way communication connection with the system control module through control cables, receive environmental parameter configuration commands, and feed back environmental status data. The temperature control unit and humidity control unit are integrated into the same test chamber structure, and realize the acquisition and control of environmental parameters through internal pipelines and sensors. The vibration simulation unit is connected to the high-precision turntable of the rotation simulation module through a mechanical mounting structure to realize the synergistic effect of vibration and rotation. The environmental simulation module establishes a power supply connection with the power supply module through power distribution lines, receives a stable working power supply, and ensures accurate control of environmental parameters.

[0050] The turntable calibration unit of the calibration module establishes a calibration connection with the high-precision turntable of the rotation simulation module through an optical interface, and establishes a bidirectional communication connection with the system control module through a data bus to upload calibration data and receive calibration commands. The signal source calibration unit establishes a calibration connection with the signal source host of the GPS signal simulation module through an RF interface, and connects to the system control module through a data bus to provide feedback on signal calibration results. The attitude measurement calibration unit establishes a calibration connection with the inertial measurement unit and tilt sensor of the attitude measurement module through a mechanical interface, and connects to the system control module through a data bus to upload attitude calibration data. The system control module establishes a bidirectional data connection with the calibration result analysis unit through an internal bus to receive calibration data and generate calibration reports, and automatically adjusts the working parameters of each module based on the calibration results.

[0051] Example 2

[0052] Please see Figures 1-8Furthermore, based on Example 1, the following is further obtained: the rotation control submodule of the rotation simulation module establishes a bidirectional control connection with the drive motor through a control cable, sends a speed control signal to the drive motor, and receives status feedback such as motor operating current and temperature; the drive motor is connected to the reduction transmission mechanism through a mechanical transmission structure, and the reduction transmission mechanism is fixedly connected to the table surface of the high-precision turntable to realize power transmission; the laser alignment device of the turntable's table surface centering positioning device establishes a one-way data connection with the system control module through a signal cable to upload alignment deviation data; the pneumatic control system of the locking mechanism is connected to the system control module through a control cable to receive clamping / releasing control commands, and the pressure sensor of the locking mechanism establishes a one-way data connection with the system control module through a signal cable to upload clamping force data; the angular position sensor of the turntable is connected to the high-speed acquisition card of the data acquisition and processing module through a dedicated data line to upload angular position and angular velocity measurement data.

[0053] The GPS signal simulation module's signal source host establishes a unidirectional signal connection with the antenna radiating unit via an RF cable, outputting GPS RF signals. The signal source host establishes a bidirectional data connection with the signal parameter configuration submodule and the signal quality analysis unit via an internal data bus, receiving parameter configuration data and outputting signal quality monitoring data. The signal parameter configuration submodule establishes a bidirectional communication connection with the system control module via an Ethernet bus, receiving scenario configuration commands and providing feedback on signal configuration status. The multi-satellite system simulation unit connects to the signal source host via an internal bus, enabling the coordinated generation of signals from multiple systems. The array antenna of the antenna radiating unit connects to the signal source host via a phase control line, receiving beam pointing control signals to ensure accurate signal coverage of the missile-borne GPS receiver.

[0054] The data analysis submodule of the data acquisition and processing module establishes a bidirectional data connection with the data synchronization calibration unit and the error tracing submodule via an internal bus, receiving synchronization calibration data and error analysis data, and outputting processed test results. The data storage unit establishes a bidirectional data connection with an industrial-grade solid-state drive via a SATA interface, enabling read, write, and storage of test data. The visualization unit of the data analysis submodule establishes a one-way data connection with the human-machine interface via a video interface, outputting test data charts. The data synchronization calibration unit establishes a one-way data connection with the system control module via a time synchronization line, receiving a unified time reference signal to ensure time consistency of multi-source data. The error tracing submodule can perform hierarchical tracing of errors generated during the test, analyzing the sources of positioning and speed measurement errors, including GPS signal simulation errors, turntable rotation errors, attitude measurement errors, and receiver errors, through an error propagation model. ( This is the total error. For error propagation coefficient, The contribution of each error source is calculated for each sub-item error, providing a basis for evaluating the accuracy of the test results.

[0055] The inertial measurement unit (IMU) of the attitude measurement module establishes a bidirectional data connection with the temperature compensation submodule via a signal cable, receiving temperature measurement data and outputting compensated IMU data. The IMU and tilt sensor establish a unidirectional data connection with the attitude calculation submodule via a dedicated data line, uploading raw measurement data. The attitude calculation submodule establishes a bidirectional data connection with the extended Kalman filter unit via an internal bus to achieve data fusion calculation. The attitude calculation submodule establishes a bidirectional communication connection with the system control module via an Ethernet bus, uploading attitude angle calculation results and receiving calculation parameter configuration commands. The GPS data fusion interface establishes a unidirectional data connection with the GPS receiver data interface via a communication line, receiving GPS positioning and velocity measurement data for fusion calculation.

[0056] The control software of the system control module establishes a two-way data connection with the test process automation unit and the fault diagnosis submodule through the internal bus, receives automated test schemes and fault diagnosis data, and outputs control commands; the remote control interface establishes a two-way communication connection with the external remote control terminal through the Ethernet interface to realize remote command transmission and data feedback; the fault diagnosis submodule establishes a one-way data connection with the status monitoring sensors (voltage, current, and temperature sensors) of each module through the signal monitoring line to collect module operating status data for fault identification.

[0057] During operation, the system control module acts as the central hub, sending synchronous control commands to each module via the Ethernet bus: rotation mode, speed, and angle commands to the rotation simulation module; signal parameter configuration commands to the GPS signal simulation module; temperature, humidity, and vibration parameter commands to the environmental simulation module; acquisition frequency and analysis algorithm commands to the data acquisition and processing module; and solution parameter commands to the attitude measurement module. Each module works collaboratively according to these commands, simultaneously feeding back its operating status and test data to the system control module, thus automating and synchronizing the testing process. For example, when the rotation simulation module initiates variable-speed rotation, the GPS signal simulation module synchronously adjusts its signal attenuation, and the environmental simulation module synchronously applies vibration stress, simulating multiple scenarios of munition flight conditions collaboratively.

[0058] The drive motor of the rotation simulation module, under the control of the rotation control submodule, drives the high-precision turntable to rotate through a reduction transmission mechanism, supporting multiple modes such as uniform speed, variable speed, and stepping. The angular position sensor provides real-time feedback on the rotation status, ensuring that the rotation parameters are accurate and controllable. The multi-satellite system simulation unit of the GPS signal simulation module generates multi-system coordinated signals. The signal source host can simulate complex scenarios such as signal attenuation, interference, and multipath. The antenna radiation unit ensures signal coverage of the receiver through phase control. The temperature and humidity control unit of the environmental simulation module works in conjunction with the vibration simulation unit to simulate the extreme environment and vibration stress during the flight of the munition, realizing the simulation of the synergistic effect of rotation and environmental stress.

[0059] The system control module generates a unified time reference signal, and the data synchronization calibration unit distributes this signal to each data acquisition node to ensure that the timestamps of rotation state data, GPS signal data, receiver output data, and attitude data are consistent. The high-speed acquisition card synchronously acquires multi-source data and transmits it to the data storage unit for storage via the internal bus. The data analysis submodule uses an error analysis algorithm to analyze the positioning error, velocity measurement error, and time synchronization error of the receiver under different rotation conditions, combined with rotation state and attitude data. The error tracing submodule traces the source of the error and provides a basis for receiver performance optimization. The visualization unit outputs the processing results to the human-machine interface in the form of charts.

[0060] The calibration module periodically calibrates the turntable, signal source, and attitude measurement unit: the turntable calibration unit calibrates rotational accuracy using optical methods, the signal source calibration unit calibrates signal parameter accuracy, and the attitude measurement calibration unit calibrates attitude measurement accuracy; the calibration result analysis unit generates a calibration report, and the system control module automatically adjusts the operating parameters of each module based on the report to ensure test accuracy; the fault diagnosis submodule automatically identifies fault locations (such as motor overheating or signal source failure) and issues alarms by monitoring the voltage, current, temperature, and other status data of each module, while providing fault diagnosis suggestions to reduce maintenance difficulty.

[0061] Testers can configure test plans (rotation parameters, signal environment, environmental parameters, test duration, etc.) through a human-computer interaction interface or remote control terminal. The test process automation unit of the system control module executes the test with one click according to the plan: automatically starting each module, synchronously collecting data, analyzing and processing data, and generating test reports. No manual intervention is required during the test, and it supports 24-hour continuous testing, which greatly improves test efficiency. Test data and reports can be remotely accessed and exported, facilitating collaborative analysis by multiple departments.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A test system for the rotational characteristics of an airborne GPS receiver, comprising a rotational simulation module, a GPS signal simulation module, a data acquisition and processing module, an attitude measurement module, a power supply module, an environmental simulation module, a calibration module, and a system control module, characterized in that: The system control module, as the core control hub, establishes bidirectional communication connections with the rotation control submodule of the rotation simulation module, the signal parameter configuration submodule of the GPS signal simulation module, the data analysis submodule of the data acquisition and processing module, and the attitude calculation submodule of the attitude measurement module via an Ethernet bus. The system control module sends control commands such as rotation mode, speed, and rotation angle to the rotation control submodule, and receives real-time rotation status feedback from the turntable. The system control module sends GPS signal frequency, power, satellite constellation and other parameter configuration instructions to the signal parameter configuration submodule, and receives signal generation status and signal quality data. The system control module sends instructions such as data acquisition frequency and analysis algorithm selection to the data analysis submodule, and receives data processing results and error analysis reports. The system control module sends instructions such as attitude calculation frequency and filtering parameters to the attitude calculation submodule and receives real-time attitude angle data. The system control module establishes a two-way data and command connection with the human-machine interface through the USB / RS232 interface, outputs test parameters, module operating status, data processing results and alarm information to the human-machine interface, and receives user operation commands and test scheme configuration data uploaded by the human-machine interface. The GPS receiver data interface of the data acquisition and processing module establishes a one-way data connection with the missile-borne GPS receiver through RS232, USB or Ethernet interface, and receives the positioning, speed measurement and time synchronization data output by the receiver; the high-speed acquisition card establishes a one-way data connection with the angular position sensor of the rotation simulation module, the signal quality analysis unit of the GPS signal simulation module, the inertial measurement unit and tilt sensor of the attitude measurement module through a dedicated data cable, and synchronously acquires multi-source test data; the high-speed acquisition card establishes a two-way data connection with the data storage unit and data analysis submodule through the internal bus to realize data storage and processing; The power supply module establishes power supply connections with all power-consuming modules through power distribution lines. The AC regulated power supply and DC switching power supply provide stable power to the drive motor of the rotation simulation module, the signal source host of the GPS signal simulation module, the high-speed acquisition card of the data acquisition and processing module, the inertial measurement unit of the attitude measurement module, the industrial computer and human-machine interface of the system control module. The backup power supply unit is connected in parallel with the main power supply line and is connected to the system control module through a switching switch to receive power supply switching commands.

2. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The rotation control submodule of the rotation simulation module establishes a bidirectional control connection with the drive motor via a control cable, sends speed control signals to the drive motor, and receives status feedback such as motor operating current and temperature. The drive motor is connected to the reduction gear mechanism via a mechanical transmission structure, and the reduction gear mechanism is fixedly connected to the table surface of the high-precision turntable to realize power transmission. The laser alignment device of the turntable's table surface centering positioning device establishes a one-way data connection with the system control module via a signal cable to upload alignment deviation data. The pneumatic control system of the locking mechanism is connected to the system control module via a control cable to receive clamping / releasing control commands. The pressure sensor of the locking mechanism establishes a one-way data connection with the system control module via a signal cable to upload clamping force data. The angular position sensor of the turntable is connected to the high-speed acquisition card of the data acquisition and processing module via a dedicated data cable to upload angular position and angular velocity measurement data.

3. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The GPS signal simulation module's signal source host establishes a unidirectional signal connection with the antenna radiating unit via an RF cable, outputting GPS RF signals. The signal source host establishes a bidirectional data connection with the signal parameter configuration submodule and the signal quality analysis unit via an internal data bus, receiving parameter configuration data and outputting signal quality monitoring data. The signal parameter configuration submodule establishes a bidirectional communication connection with the system control module via an Ethernet bus, receiving scenario configuration commands and providing feedback on signal configuration status. The multi-satellite system simulation unit connects to the signal source host via an internal bus, enabling the coordinated generation of signals from multiple systems. The array antenna of the antenna radiating unit connects to the signal source host via a phase control line, receiving beam pointing control signals to ensure accurate signal coverage of the missile-borne GPS receiver.

4. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The data analysis submodule of the data acquisition and processing module establishes a bidirectional data connection with the data synchronization calibration unit and the error tracing submodule through the internal bus, receives synchronization calibration data and error analysis data, and outputs the processed test results; the data storage unit establishes a bidirectional data connection with the industrial-grade solid-state drive through the SATA interface to realize the reading, writing and storage of test data; the visualization unit of the data analysis submodule establishes a one-way data connection with the human-machine interface through the video interface to output test data charts. The data synchronization calibration unit establishes a one-way data connection with the system control module through a time synchronization line, receives a unified time reference signal, and ensures the time consistency of multi-source data.

5. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The inertial measurement unit of the attitude measurement module establishes a bidirectional data connection with the temperature compensation submodule via a signal cable, receiving temperature measurement data and outputting compensated inertial measurement data. The inertial measurement unit and tilt sensor establish a unidirectional data connection with the attitude calculation submodule via a dedicated data line, uploading the original measurement data. The attitude calculation submodule establishes a bidirectional data connection with the extended Kalman filter unit via an internal bus to achieve data fusion calculation. The attitude calculation submodule establishes a bidirectional communication connection with the system control module via an Ethernet bus, uploading attitude angle calculation results and receiving calculation parameter configuration commands. The GPS data fusion interface establishes a unidirectional data connection with the GPS receiver data interface via a communication line, receiving GPS positioning and velocity measurement data for fusion calculation.

6. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The control software of the system control module establishes a two-way data connection with the test process automation unit and the fault diagnosis submodule through the internal bus, receives automated test schemes and fault diagnosis data, and outputs control commands; the remote control interface establishes a two-way communication connection with the external remote control terminal through the Ethernet interface to realize remote command transmission and data feedback; the fault diagnosis submodule establishes a one-way data connection with the status monitoring sensors (voltage, current, and temperature sensors) of each module through the signal monitoring line to collect module operating status data for fault identification.

7. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The temperature control unit, humidity control unit, and vibration simulation unit of the environmental simulation module establish a two-way communication connection with the system control module through control cables, receive environmental parameter configuration commands, and feed back environmental status data. The temperature control unit and humidity control unit are integrated into the same test chamber structure, and realize the acquisition and control of environmental parameters through internal pipelines and sensors. The vibration simulation unit is connected to the high-precision turntable of the rotation simulation module through a mechanical mounting structure to realize the synergistic effect of vibration and rotation. The environmental simulation module establishes a power supply connection with the power supply module through power distribution lines, receives a stable working power supply, and ensures accurate control of environmental parameters.

8. The test system for the rotational characteristics of a missile-borne GPS receiver according to claim 1, characterized in that: The turntable calibration unit of the calibration module establishes a calibration connection with the high-precision turntable of the rotation simulation module through an optical interface, and establishes a bidirectional communication connection with the system control module through a data bus to upload calibration data and receive calibration commands; the signal source calibration unit establishes a calibration connection with the signal source host of the GPS signal simulation module through an RF interface, and connects to the system control module through a data bus to provide feedback on signal calibration results. The attitude measurement and calibration unit establishes a calibration connection with the inertial measurement unit and tilt sensor of the attitude measurement module through a mechanical interface, and connects to the system control module through a data bus to upload attitude calibration data. The system control module establishes a bidirectional data connection with the calibration result analysis unit through an internal bus, receives calibration data and generates a calibration report, and automatically adjusts the working parameters of each module according to the calibration results.

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