CN113848754B - Airplane ground power supply monitor test method based on semi-physical simulation - Google Patents
Airplane ground power supply monitor test method based on semi-physical simulation Download PDFInfo
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- CN113848754B CN113848754B CN202111130550.1A CN202111130550A CN113848754B CN 113848754 B CN113848754 B CN 113848754B CN 202111130550 A CN202111130550 A CN 202111130550A CN 113848754 B CN113848754 B CN 113848754B
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- 238000004088 simulation Methods 0.000 title claims abstract description 52
- 238000010998 test method Methods 0.000 title description 5
- 238000012360 testing method Methods 0.000 claims abstract description 24
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000009466 transformation Effects 0.000 claims abstract description 8
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- 238000004458 analytical method Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 31
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- 238000004364 calculation method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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Abstract
The invention provides a semi-physical simulation-based aircraft ground power supply monitor testing method, which comprises the steps of firstly, collecting an output waveform image of a ground power supply vehicle when the ground power supply monitor product is out of field and has fault protection moment; secondly, processing the waveform image by adopting software with an image processing function to obtain the waveform data for realizing the restoration of the output waveform of the ground power supply vehicle, and outputting the waveform image to the simulation waveform; and then outputting the obtained simulation waveform to power amplification equipment, wherein the power amplification equipment is in power connection with a ground power supply monitor product, so that the power output of the ground power supply vehicle waveform test is realized, and the output characteristic test of the field simulation ground power supply monitor product when the field simulation ground power supply monitor product suddenly adds a transformation rectifying type load to the field ground power supply vehicle is completed. The invention can complete the power test of the ground power supply monitor products in the field, and realize the auxiliary fault analysis and product improvement of the monitor products according to the test result.
Description
Technical Field
The invention belongs to the aviation electrical design technology, and relates to a semi-physical simulation-based test method for an aircraft ground power supply monitor.
Background
The ground power supply monitor is mainly used for monitoring the power supply quality of the ground power supply vehicle of the airplane, generally has over-voltage and under-voltage, over-frequency and under-frequency and phase sequence protection functions, and due to the fact that load types on the airplane are continuously updated in recent years, the adaptability of the ground power supply vehicle and the monitor to different types of loads is different, and the failure rate of ground power supply monitor products is obviously improved when the ground power supply monitor products are used in an external field. According to statistics, the fault rate of a ground power supply monitor used on a certain type of aircraft reaches about 12 monitors/year in recent three years, and the monitor products are protected during use, so that the normal monitoring of the ground power supply by the products is affected. At present, if the monitor products are protected in an external field, the products are required to be returned to the field for fault investigation, but after the products are returned to the field, the conditions such as a ground power supply and corresponding loads which are adapted to the monitor products in use are different from the external field conditions to a certain extent, so that the external field faults are often difficult to reproduce in the internal field, and the quality problem of the products is greatly difficult to process.
Disclosure of Invention
Aiming at the problems that the monitor type products have higher failure rate when being used in an external field, and the monitor is difficult to recover from most failures after being returned to the field due to the failures, and the failure is difficult to find, the invention considers that the waveform of the ground power supply vehicle at the moment of the failure protection of the external field ground power supply monitor is restored with power in an internal field, simulates the output waveform of the external field ground power supply vehicle, tests the monitor type products, searches the reasons of the failure of the monitor type products in the external field frequently, is convenient for product improvement, and finally achieves the aim of reducing the failure rate of the external field use of the products.
The technical scheme of the invention is as follows:
the method for testing the aircraft ground power supply monitor based on the semi-physical simulation comprises the following steps:
step 1: collecting an output waveform image of a ground power supply vehicle when the ground power supply monitor product is out of field and fails to protect the moment;
step 2: processing the waveform image by adopting software with an image processing function to obtain the waveform data for realizing the restoration of the output waveform of the ground power supply vehicle, and outputting the waveform image to the simulation waveform;
step 3: and (2) outputting the simulation waveform obtained in the step (2) to power amplification equipment, wherein the power amplification equipment is in power connection with a ground power supply monitor product, so that the power output of the ground power supply vehicle waveform test is realized, and the output characteristic test of the field simulation ground power supply monitor product when a voltage transformation rectifying type load is suddenly applied to the field ground power supply vehicle is completed.
Further, in step 1, a ground power supply vehicle output waveform image when the ground power supply monitor product fails to protect due to the moment of suddenly adding a variable-shape load is collected.
Further, in step 1, enhancement processing is performed on the acquired waveform image.
In step 2, the MATLAB software is used for recovering the output waveform of the ground power supply vehicle at the moment of using the variable-voltage rectification load to obtain waveform data, so that the three-phase voltage waveform output by the ground power supply vehicle is converted into a data format file; and the data is output in the working space of the MATLAB software in a simulation model form by utilizing the data processing function of the MATLAB software, so that the waveform image is output to the simulation waveform.
Further, in step 2, when the data is outputted in the form of simulation model, the normal waveform is obtained by calculating the phase and amplitude of the waveform, and the jump waveform is obtained by extracting the data.
Furthermore, the semi-physical simulation system comprises a real-time simulation system, an IO interface box and power amplification equipment, wherein the real-time simulation system realizes the output of simulation waveforms, and the simulation waveforms are output to the power amplification equipment by utilizing the IO interface box.
Advantageous effects
The invention can complete the power test of the ground power supply monitor products in the field, and realize the auxiliary fault analysis and product improvement of the monitor products according to the test result. Meanwhile, the test method based on the semi-physical simulation system is also suitable for the design of the controller type products, the output waveforms of the controlled objects under various limit conditions can be realized through programming in the initial stage of the product design, and the semi-physical simulation system is used for outputting, so that the test under various limit conditions in the internal field of the controller type products is realized, the design and improvement of the products can be assisted by product designers, and the product quality is obviously improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of a semi-physical simulation system;
FIG. 2 is an output waveform of an outfield ground power supply vehicle at the moment of switching in a variable-voltage rectification type load;
FIG. 3 is a transient waveform of a ground power supply vehicle output in a MATLAB working space by using scattered points;
fig. 4 is a simulation model built in MATLAB/simulink, the simulation model can output waveforms of a ground power supply vehicle under normal conditions, conversion of waveforms at fault moment and continuous real-time output of waveforms are realized through switching of a switch, and the simulation waveforms are subjected to power connection with monitor products after being subjected to signal conditioning of an IO interface box and output of a power amplifier, so that power test of the ground power supply monitor can be realized.
Detailed Description
The following detailed description of embodiments of the invention is exemplary and intended to be illustrative of the invention and not to be construed as limiting the invention.
According to the embodiment, the waveform of the ground power supply vehicle in the external field is restored with power in the field, the output waveform of the ground power supply vehicle in the external field is simulated, so that the monitor products are tested, and the monitor products are assisted in fault analysis.
In the use of the external field, the ground power supply causes the monitor protection at the moment of suddenly adding a transformation rectifying type load, for the situation, firstly, equipment such as an oscilloscope is used for collecting the output waveform image of the ground power supply vehicle when the monitor breaks down at the moment of the external field, the waveform image (jpg format) is enhanced, so that the image output is clearer, the recovery of the waveform of the ground power supply vehicle at the moment of using the transformation rectifying type load is realized by utilizing relevant processing software such as an image processing function of MATLAB and the like, waveform data is obtained, and therefore, the three-phase voltage waveform output by the ground power supply vehicle is converted into a data format file (. Xlsx), as shown in a table 1, the table 1 is three-phase output voltage values of the ground power supply vehicle at different times after the output waveform enhancement processing, and the table 1 is only partial data due to the large data quantity; and outputting the data in the working space of the MATLAB in a simulation model form by utilizing the data processing function of the MATLAB, so as to realize the output from the waveform image to the simulation waveform.
Table 1 three-phase output voltage values (partial data) of ground power supply vehicle at different times
Furthermore, the waveform is continuously output when the outfield ground power supply vehicle works, if the complete restoration of the graphic data is realized in the simulation, the data volume is overlarge, and the power supply vehicle only jumps in waveform of the output voltage when the transformation rectification type load is used, so that when the simulation output is carried out, only the data extraction is carried out on the jump waveform, and the normal output waveform is obtained by calculating the phase and the amplitude of the waveform. The normal power supply vehicle waveform obtained through phase and amplitude calculation is output at the beginning of simulation, when the waveform jump of the output voltage occurs at a certain moment, the jump waveform is output to simulate the addition of a transformation rectification type load, then the power supply vehicle waveform obtained through phase and amplitude calculation is output normally, the continuous output of the power supply vehicle waveform can be ensured, and the continuous output of the waveform of the ground power supply vehicle in MATLAB/Simulink software is finally realized.
The semi-physical simulation system generally comprises a real-time simulation system, an IO interface box and power amplification equipment, in the embodiment, the waveform of the ground power supply vehicle which is output in MATLAB/Simulink software is processed in real time and is downloaded to a real-time simulator for simulation, the waveform of the ground power supply vehicle is output to the power amplification equipment by utilizing the IO interface box, the power amplification equipment is used for realizing power output of the waveform test of the ground power supply vehicle, the power amplification equipment is connected with a ground power supply monitor product in a power mode, and the output characteristic test of the field analog monitor product in the external field ground power supply vehicle with a voltage transformation rectification type load is completed. The test method can be based on a semi-physical simulation system, can output various waveforms which can cause the faults of the ground power supply monitor in real time through waveform restoration or waveform programming and the like, and forms a semi-physical simulation waveform test unit for testing the ground power supply monitor.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (5)
1. A semi-physical simulation-based aircraft ground power supply monitor testing method is characterized by comprising the following steps of: the method comprises the following steps:
step 1: collecting an output waveform image of a ground power supply vehicle when the ground power supply monitor product is out of field and fails to protect the moment;
step 2: processing the waveform image by adopting software with an image processing function to obtain the waveform data for realizing the restoration of the output waveform of the ground power supply vehicle, and outputting the waveform image to the simulation waveform;
step 3: the simulation waveform obtained in the step 2 is output to power amplification equipment, the power amplification equipment is in power connection with a ground power supply monitor product, the power output of the waveform test of the ground power supply vehicle is realized, and the output characteristic test of the in-field simulation ground power supply monitor product when the voltage transformation rectifying type load is suddenly added to the external ground power supply vehicle is completed;
the semi-physical simulation system comprises a real-time simulation system, an IO interface box and power amplification equipment, wherein the real-time simulation system realizes the output of simulation waveforms, and the simulation waveforms are output to the power amplification equipment by utilizing the IO interface box.
2. The method for testing the aircraft ground power supply monitor based on the semi-physical simulation according to claim 1, wherein the method comprises the following steps of: in step 1, a ground power supply vehicle output waveform image when the ground power supply monitor product fails to protect at the moment of sudden addition of a variable rectifying load is acquired.
3. The method for testing the aircraft ground power supply monitor based on the semi-physical simulation according to claim 2, wherein the method comprises the following steps of: in step 1, enhancement processing is performed on the acquired waveform image.
4. The method for testing the aircraft ground power supply monitor based on the semi-physical simulation according to claim 1, wherein the method comprises the following steps of: in the step 2, MATLAB software is used for restoring the output waveform of the ground power supply vehicle at the moment of using the variable-voltage rectification load to obtain waveform data, so that the three-phase voltage waveform output by the ground power supply vehicle is converted into a data format file; and the data is output in the working space of the MATLAB software in a simulation model form by utilizing the data processing function of the MATLAB software, so that the waveform image is output to the simulation waveform.
5. The method for testing the aircraft ground power supply monitor based on the semi-physical simulation according to claim 4, wherein the method comprises the following steps of: in step 2, when the data is output in the form of simulation model, the normal waveform is obtained by calculating the phase and amplitude of the waveform, and the jump waveform is obtained by extracting the data.
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