CN114665946A - Satellite measurement and control test channel integrity rapid self-checking evaluation system and method - Google Patents
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Abstract
The invention provides a satellite measurement and control test channel integrity rapid self-checking evaluation system and method, which adopts a system internal multifunctional baseband module as a self-checking signal excitation signal source to directly output a self-checking signal, and upper computer software completes the automatic control and evaluation calculation processing of the baseband module, a frequency converter and a switch matrix, and simultaneously utilizes test monitoring software of a characteristic parameter model matching method to carry out real-time interpretation and monitoring on key parameters of a three-level loop comparison self-checking technology of measurement and control test equipment; according to the test method, parameter monitoring and evaluation tests of the measurement and control channel are completed, effective evaluation of the measurement and control channel in the launching field test and test identification evaluation work is realized, self-checking and evaluation of parameters of the whole channel can be automatically completed, the integrity, the correctness and the safety of the measurement and control channel are ensured, and the high efficiency of one-click test is verified.
Description
Technical Field
The invention belongs to the technical field of aerospace testing, relates to a spacecraft testing and test identification technology, and particularly relates to a satellite measurement and control testing channel integrity rapid self-checking evaluation system and method based on characteristic parameter model matching.
Background
With the increasing demand for the experimental identification of the launching field of military satellite equipment, the launching field puts higher requirements on a testing and experimental identification system. The measurement and control test equipment is required to have the capabilities of quick self-checking evaluation and automatic calibration in the work of a transmitting field. The traditional measurement and control channel equipment realizes the inspection of the working health state of the equipment based on external tools and instruments, needs to artificially monitor and judge the states of the equipment and the channel in real time, and does not meet the universal and safe requirements of the rapid measurement and transmission of military satellites and the test identification work.
The method for monitoring and evaluating the channel state of the original equipment has the following defects: (1) the testing method cannot rapidly monitor the health state of the measurement and control channel in real time and cannot meet the real-time safety monitoring requirement of the test identification work of the transmitting field; (2) the measurement and control testing equipment has more components, wherein the quantity of state quantity parameters of each equipment is more, the parameters are inconvenient to be uniformly interpreted, monitored and managed when the measurement and control testing equipment is calibrated and self-checked, and the target difference between the one-key test self-check and the calibration is larger; (3) the measurement equipment has complex composition and poor universality, large-scale equipment such as a frequency spectrograph, a signal source, an attenuator, a power meter and the like is used during equipment self-inspection, and the system has a complex structure and is not suitable for a transmitting field test and identification evaluation environment; (4) the complex composition of the instruments and equipment, high use requirement capacity and long construction period of the test system are not beneficial to the requirement of quick task test and launch; (5) the original method has many manual operations and does not meet the automatic monitoring and evaluation requirements of a satellite launching field.
Disclosure of Invention
In view of this, the invention aims to provide a system and a method for rapid self-checking and evaluating the integrity of a satellite measurement and control test channel, which can automatically realize the health state test of a three-level loop of measurement and control test equipment by using a self-checking calibration sequence in an upper computer in a one-click way without manual intervention and outputting a test report; and various important parameter health states and test data results in the ground test equipment can be monitored, interpreted, measured and controlled in real time, and the ground test equipment has the capabilities of information warning and data archiving. Through the steps and the method, the measurement and control ground test equipment has the capabilities of quick self-checking evaluation and automatic calibration.
A satellite measurement and control test channel integrity rapid self-checking and evaluating system comprises a modulation module, a demodulation module, an up-converter, a down-converter, a first attenuator, a signal source, a second attenuator, a first measurement and control switch, a second measurement and control switch, a first microwave switch, a second microwave switch, a power sensor, a spectrum analyzer and an upper computer;
the modulation module is connected with the up-converter through a first measurement and control switch; the up-converter is connected with an attenuator through a first microwave switch; the signal source is connected with the first attenuator, the uplink cable is directly connected with the downlink cable, the second attenuator is connected with the down converter through the second microwave switch, and the down converter is connected with the demodulation module through the second measurement and control switch; the demodulation module, the first measurement and control switch, the second measurement and control switch and the demodulation module form a multifunctional measurement and control baseband unit; the first microwave switch, the second microwave switch, the signal source, the first attenuator and the second attenuator form a multifunctional switch matrix unit. The power sensor and the spectrum analyzer are both connected with the second attenuator;
the multifunctional measurement and control baseband unit, the up-converter, the multifunctional switch matrix unit, the power sensor, the spectrum analyzer and the down-converter are all connected with an upper computer through a TCP/IP bus;
the upper computer is used for configuring parameters of the modulation module, the demodulation module, the up-converter, the down-converter, the first attenuator, the signal source and the second attenuator; meanwhile, the control demodulation module sends a measurement intermediate frequency signal to control the first measurement and control switch, the second measurement and control switch, the first microwave switch and the second microwave switch; receiving signals of a power sensor and a spectrum analyzer; meanwhile, parameters of the up-converter and the down-converter, modulation function parameters of the modulation module, demodulation function parameters of the demodulation module and distance and speed measurement function parameters are monitored.
An evaluation method based on the self-checking evaluation system comprises the following steps:
a first measurement and control switch and a second measurement and control switch in the multifunctional measurement and control baseband unit are arranged to directly connect the modulation module and the demodulation module to form a self-closing ring state; setting a modulation module to send out a measured intermediate frequency signal; the demodulation module receives the medium-frequency signal through the internal self-closing loop, the upper computer automatically records the modulation function parameter, the demodulation function parameter and the distance and speed measurement function parameter check, the state evaluation result of the primary loop is displayed, and the health state check of the primary loop is completed.
Furthermore, a first measurement and control switch and a second measurement and control switch are set to be in a test state, namely the first measurement and control switch connects the modulation module to the up-converter, and the test switch 2 connects the demodulation module to the down-converter; a first microwave switch and a second microwave switch are arranged to directly connect the up-converter and the down-converter; a modulation module is arranged to send out a measured intermediate frequency signal, the signal is directly output to down conversion through a self-closing loop formed by a first microwave switch and a second microwave switch after up conversion, and then the signal is transmitted to a demodulation module; and the upper computer records the modulation function parameters, the demodulation function parameters, the parameters of the upper converter and the lower converter and the functional parameter check of the switch matrix, automatically binds the zero value of the ground test equipment of the measurement and control subsystem and completes the health state check of the secondary loop at the test equipment end of the measurement and control subsystem.
Furthermore, an uplink cable is directly connected with a downlink cable to form a test radio frequency cable, a first measurement and control switch is arranged to connect the modulation module to the up-converter, and a second measurement and control switch is arranged to connect the demodulation module to the down-converter; a first microwave switch is arranged to connect the up-converter to the first attenuator, and a second microwave switch is arranged to connect the down-converter to the second attenuator; setting a modulation module to send out a measured intermediate frequency signal, returning the measured intermediate frequency signal to a second attenuator through a first attenuator and a test radio frequency cable after up-conversion, and returning the measured intermediate frequency signal to the demodulation module through a down-converter; the upper computer performs remote control modulation function check, remote measurement demodulation function check and distance measurement and speed measurement function check, zero values of the ground test system of the measurement and control subsystem are bound, and the three-level loop health state check of the test equipment end of the measurement and control subsystem is completed.
Further, the signal source module is controlled to send a single carrier signal of a certain specific frequency point, the single carrier signal is output by the first attenuator and then returns to the second attenuator through the ground test radio frequency cable, the power sensor measures the power of the signal output by the second attenuator, and the upper computer software automatically reads the power indication number and displays and records the insertion loss value of the test radio frequency cable; the spectrum analyzer is used for monitoring the state of the output signal of the second attenuator and sending the state to the upper computer.
Furthermore, the parameters monitored by the upper computer are compared with the normal value range and the jump value range of the stored parameters, and an alarm signal is generated and recorded.
The invention has the following beneficial effects:
(1) the invention adopts a multifunctional baseband module in the system as a self-checking signal excitation signal source, directly outputs a self-checking signal, and completes the automatic control and evaluation calculation processing of the baseband module, a frequency converter and a switch matrix by upper computer software, and simultaneously utilizes test monitoring software of a characteristic parameter model matching method to carry out real-time interpretation and monitoring on key parameters of a comparison self-checking technology of a three-level loop of a measurement and control test device. According to the test method, parameter monitoring and evaluation tests of the measurement and control channel are completed, effective evaluation of the measurement and control channel in the launching field test and test identification evaluation work is realized, self-checking and evaluation of parameters of the whole channel can be automatically completed, the integrity, the correctness and the safety of the measurement and control channel are ensured, and the high efficiency of one-click test is verified;
(2) the testing method adopts a flow design, comprehensively examines key parameters of key equipment in a measurement and control channel in one flow, including a baseband, a radio frequency, a cable and the like, and has comprehensive coverage;
(3) the ground equipment composition adopted by the test method meets the requirements of generalization and integration, the number of test equipment is greatly reduced, the interface is simple, the operation is easy, and the test method is very suitable for a rapid test and transmission mode of test and identification of a transmitting field.
Drawings
Fig. 1 is a schematic diagram of a satellite measurement and control test channel integrity rapid self-checking evaluation system of the invention.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The original test equipment comprises a modulation module, a demodulation module, an up-converter, a down-converter, an attenuator 1, a signal source and an attenuator 2; the modulation module is connected with an up-converter, and the up-converter is connected with an attenuator; attenuator 1 is connected with the satellite that awaits measuring through the last cable in the test cable, and the satellite is connected with the attenuator through the cable down, and the attenuator is connected with the down converter, and the down converter is connected with the demodulation module.
On the basis of the original test equipment, the invention is improved, and a self-checking evaluation system is established, which comprises a measurement and control switch 1, a measurement and control switch 2, a microwave switch 1, a microwave switch 2, a power sensor, a spectrum analyzer and an upper computer;
the modulation module is connected with an up-converter through a measurement and control switch 1; the up-converter is connected with an attenuator through a microwave switch 1; the signal source is connected with an attenuator 1, an uplink cable is directly connected with a downlink cable, the attenuator 2 is connected with a down converter through a microwave switch 2, and the down converter is connected with a demodulation module through a measurement and control switch 2; the demodulation module, the measurement and control switch 1, the measurement and control switch 2 and the demodulation module form a multifunctional measurement and control baseband unit; the microwave switch 1, the microwave switch 2, the signal source, the attenuator 1 and the attenuator 2 form a multifunctional switch matrix unit. The power sensor and the spectrum analyzer are both connected with the attenuator 2.
The multifunctional measurement and control baseband unit, the up-converter, the multifunctional switch matrix unit, the power sensor, the spectrum analyzer and the down-converter are all connected with an upper computer through a TCP/IP bus;
1) executing a primary loop self-checking calibration program in the upper computer, and setting a measurement and control switch 1 and a measurement and control switch 2 in the multifunctional measurement and control baseband unit to directly connect the modulation module and the demodulation module to form a self-closing loop state; setting a modulation module to send out a measurement intermediate frequency signal; the demodulation module receives the intermediate frequency signal through an internal self-closing loop. And the upper computer automatically records the modulation function parameters, the demodulation function parameters and the distance and speed measurement function parameter check, displays the state evaluation result of the primary loop and completes the health state check of the primary loop.
2) Executing a secondary loop self-checking calibration program in the upper computer, and setting the measurement and control switch 1 and the measurement and control switch 2 to be in a testing state, namely, the measurement and control switch 1 connects the modulation module to the upper frequency converter, and the test switch 2 connects the demodulation module to the lower frequency converter; setting a microwave switch 1 and a microwave switch 2 in a switch matrix unit to be in a self-checking state, namely, directly connecting an up converter and a down converter by the two microwave switches; the modulation module is arranged to send out a measured intermediate frequency signal, the signal is directly output to down conversion through a self-closing loop formed by the microwave switch 1 and the microwave switch 2 after up conversion, and then the signal is transmitted to the demodulation module. The upper computer automatically records the modulation function parameter, the demodulation function parameter, the parameters of the upper converter and the lower converter and the function parameter check of the switch matrix, automatically binds the zero value of the ground test equipment of the measurement and control subsystem, and completes the health state check of the secondary loop at the test equipment end of the measurement and control subsystem.
3) The satellite-ground test cable is set to be in a self-loop state (an uplink cable is directly connected with a downlink cable to form a test radio frequency cable). Executing a three-level loop self-checking calibration program in the upper computer, and setting a measurement and control switch 1 and a measurement and control switch 2 to be in a testing state, namely, the measurement and control switch 1 connects a modulation module to an upper frequency converter, and the test switch 2 connects a demodulation module to a lower frequency converter; the microwave switch 1 and the microwave switch 2 are set to be in a measuring state, namely, the microwave switch 1 connects the up converter to the attenuator 1, and the microwave switch 2 connects the down converter to the attenuator 2. Setting a modulation module to send out a measured intermediate frequency signal, performing up-conversion, returning to an attenuator 2 through an attenuator 1 and a test radio frequency cable, and returning to a demodulation module through a down-converter; the parameters of the attenuator and the frequency converter are set by an upper computer through a TCP/IP bus. In the test of this link, the host computer carries out remote control modulation function check, remote measurement demodulation function check and distance measurement and speed measurement function check, binds the zero value of the ground test system of the measurement and control subsystem, and completes the three-level loop health state check of the test equipment end of the measurement and control subsystem.
4) A self-checking calibration program in an upper computer is utilized to control a signal source module in a switch matrix unit to send a single carrier signal of a certain specific frequency point, the single carrier signal is output by an attenuator 1 and then returns to an attenuator 2 through a ground test radio frequency cable, a power sensor measures the power of the signal output by the attenuator 2, and upper computer software automatically reads a power counting number, displays and automatically records the insertion loss value of the test radio frequency cable; the spectrum analyzer is used to monitor the state of the output signal of the attenuator 2.
5) The self-checking calibration sequence is designed based on automatic performance testing software and is respectively designed according to three steps of initializing an instrument, executing a function and closing the instrument. In the 'initializing instrument' sequence module, all equipment is initialized and returns to the instrument networking state check and the function state check, wherein the equipment comprises a remote control port (TC), a remote measurement port (TM), a distance measurement port (RNG), a frequency converter program control port, a switch matrix program control port, a signal source, a power meter program control port and the like of multifunctional baseband equipment. In the function execution sequence module, all instrument commands needing to be operated are compiled according to the project sequence calibrated by self-checking. And (4) setting a cycle node for the item needing to test the multipoint data, setting cycle times and jump-out conditions, and automatically generating a test report after all functions are executed. In the instrument closing sequence module, instrument ports opened in the initialization sequence are all closed, a self-checking calibration program exits, and a system working mode is entered;
6) by a testing method based on characteristic parameter model matching, key parameters in a multifunctional measurement and control baseband module (carrier synchronization identification/pseudo code synchronization identification/bit synchronization identification/frame synchronization identification/signal to noise ratio/AGC/measurement and control switch state), an up-converter module, a down-converter module (uplink and downlink frequency points/gain values), a radio frequency switch matrix module (attenuation value/microwave switch state), a power meter (power value indication number) and a spectrum analyzer (in-band power/out-of-band inhibition/spectrum screenshot) in measurement and control testing equipment can be interpreted and monitored in real time when a three-level loop self-detection calibration test is carried out, and normal value ranges and jump value ranges of the key parameters are recorded in 'database setting'. The abnormal state in the test triggers the alarm function of the software, the indicator lamp after the corresponding key parameter turns red, and the corresponding log and the prompt are provided in the alarm record. Meanwhile, the test data is recorded and archived in real time, and can be inquired in a corresponding path in the archived record afterwards, so that the test data is recorded and traceable.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A satellite measurement and control test channel integrity rapid self-checking and evaluating system is characterized by comprising a modulation module, a demodulation module, an up-converter, a down-converter, a first attenuator, a signal source, a second attenuator, a first measurement and control switch, a second measurement and control switch, a first microwave switch, a second microwave switch, a power sensor, a spectrum analyzer and an upper computer;
the modulation module is connected with the up-converter through a first measurement and control switch; the up-converter is connected with an attenuator through a first microwave switch; the signal source is connected with the first attenuator, the uplink cable is directly connected with the downlink cable, the second attenuator is connected with the down converter through the second microwave switch, and the down converter is connected with the demodulation module through the second measurement and control switch; the demodulation module, the first measurement and control switch, the second measurement and control switch and the demodulation module form a multifunctional measurement and control baseband unit; the first microwave switch, the second microwave switch, the signal source, the first attenuator and the second attenuator form a multifunctional switch matrix unit. The power sensor and the spectrum analyzer are both connected with the second attenuator;
the multifunctional measurement and control baseband unit, the up-converter, the multifunctional switch matrix unit, the power sensor, the spectrum analyzer and the down-converter are all connected with the upper computer;
the upper computer is used for configuring parameters of the modulation module, the demodulation module, the up-converter, the down-converter, the first attenuator, the signal source and the second attenuator; meanwhile, the control demodulation module sends a measurement intermediate frequency signal to control the first measurement and control switch, the second measurement and control switch, the first microwave switch and the second microwave switch; receiving signals of a power sensor and a spectrum analyzer; meanwhile, parameters of the up-converter and the down-converter, modulation function parameters of the modulation module, demodulation function parameters of the demodulation module and distance and speed measurement function parameters are monitored.
2. The method for evaluating the satellite measurement and control test channel integrity rapid self-checking evaluation system according to claim 1, comprising:
a first measurement and control switch and a second measurement and control switch in the multifunctional measurement and control baseband unit are arranged to directly connect the modulation module and the demodulation module to form a self-closing ring state; setting a modulation module to send out a measurement intermediate frequency signal; the demodulation module receives the medium-frequency signal through the internal self-closing loop, the upper computer automatically records the modulation function parameter, the demodulation function parameter and the distance and speed measurement function parameter check, the state evaluation result of the primary loop is displayed, and the health state check of the primary loop is completed.
3. The method for rapid self-test evaluation of satellite measurement and control test channel integrity of claim 2, comprising: setting a first measurement and control switch and a second measurement and control switch to be in a test state, namely, the first measurement and control switch connects a modulation module to an up-converter, and a test switch 2 connects a demodulation module to a down-converter; a first microwave switch and a second microwave switch are arranged to directly connect the up-converter and the down-converter; a modulation module is arranged to send out a measured intermediate frequency signal, the signal is directly output to down conversion through a self-closing loop formed by a first microwave switch and a second microwave switch after up conversion, and then the signal is transmitted to a demodulation module; and the upper computer records the modulation function parameters, the demodulation function parameters, the parameters of the upper converter and the lower converter and the functional parameter check of the switch matrix, automatically binds the zero value of the ground test equipment of the measurement and control subsystem and completes the health state check of the secondary loop at the test equipment end of the measurement and control subsystem.
4. The method for rapid self-test evaluation of satellite measurement and control test channel integrity of claim 2, comprising: the uplink cable is directly connected with the downlink cable to form a test radio frequency cable, a first measurement and control switch is arranged to connect the modulation module to the up-converter, and a second measurement and control switch is arranged to connect the demodulation module to the down-converter; a first microwave switch is arranged to connect the up-converter to the first attenuator, and a second microwave switch is arranged to connect the down-converter to the second attenuator; setting a modulation module to send out a measured intermediate frequency signal, returning the measured intermediate frequency signal to a second attenuator through a first attenuator and a test radio frequency cable after up-conversion, and returning the measured intermediate frequency signal to the demodulation module through a down-converter; the upper computer performs remote control modulation function check, remote measurement demodulation function check and distance measurement and speed measurement function check, zero values of the ground test system of the measurement and control subsystem are bound, and the three-level loop health state check of the test equipment end of the measurement and control subsystem is completed.
5. The method for rapid self-test evaluation of satellite measurement and control test channel integrity of claim 2, comprising: the signal source module is controlled to send a single carrier signal of a certain specific frequency point, the single carrier signal is output by the first attenuator and then returns to the second attenuator through the ground test radio frequency cable, the power sensor measures the power of the output signal of the second attenuator, and the upper computer software automatically reads the power gauge number and displays and records the insertion loss value of the test radio frequency cable; the spectrum analyzer is used for monitoring the state of the output signal of the second attenuator and sending the state to the upper computer.
6. The method for rapid self-test evaluation of satellite measurement and control test channel integrity of claim 2, comprising: and comparing the parameters monitored by the upper computer with the stored normal value range and the jump value range of the parameters, generating an alarm signal and recording the alarm signal.
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