CN113848754A - Aircraft ground power supply monitor testing method based on semi-physical simulation - Google Patents
Aircraft ground power supply monitor testing method based on semi-physical simulation Download PDFInfo
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- CN113848754A CN113848754A CN202111130550.1A CN202111130550A CN113848754A CN 113848754 A CN113848754 A CN 113848754A CN 202111130550 A CN202111130550 A CN 202111130550A CN 113848754 A CN113848754 A CN 113848754A
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- 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
Abstract
The invention provides a plane ground power supply monitor testing method based on semi-physical simulation, which comprises the steps of firstly, acquiring an output waveform image of a ground power supply vehicle when a ground power supply monitor product outfield has fault protection moment; secondly, processing the waveform image by adopting software with an image processing function to obtain waveform data for realizing the restoration of the output waveform of the ground power supply vehicle and realizing the output from the waveform image to the simulation waveform; and then outputting the obtained simulated 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 waveform test of the ground power supply vehicle is realized, and the output characteristic test of the in-field simulated ground power supply monitor product on the external ground power supply vehicle when a voltage-variable rectification type load is suddenly added is completed. The invention can complete the power test of ground power supply monitor products in an internal field, and realize the auxiliary fault analysis and product improvement of monitor products according to the test result.
Description
Technical Field
The invention belongs to the aviation electrical design technology, and relates to a method for testing an aircraft ground power supply monitor based on semi-physical simulation.
Background
The ground power supply monitor is mainly used for monitoring the power supply quality of the airplane ground power supply vehicle, generally has the functions of over-under voltage, over-under frequency and phase sequence protection, and has the defect that the failure rate of ground power supply monitor products is obviously improved when the ground power supply vehicle and the monitor are used in an external field due to the fact that the types of loads on the airplane are continuously updated and updated in recent years and the adaptability of the ground power supply vehicle and the monitor to different types of loads is different. According to statistics, the ground power supply monitor used on a certain type of airplane has a failure rate of about 12 monitors per year in the last three years, and monitor products are protected when in use, so that the normal monitoring of the ground power supply by the monitor products is influenced. At present, for monitor products, if the monitor products are protected in an external field, the monitor products need to be returned to the field for troubleshooting, but conditions such as a ground power supply and a corresponding load which are adapted to the monitor products when the monitor products are used after being returned to the field are different from conditions of the external field, so that the external field fault is often difficult to reappear in the internal field, and great difficulty is caused in processing quality problems of the products.
Disclosure of Invention
Aiming at the problems that the monitor products have high failure rate when used in an external field, most of the monitors are difficult to recover due to failure and difficult to find out faults after the monitors return to the field, the invention considers that the waveform of the ground power supply vehicle at the moment of fault protection of the external field ground power supply monitor is subjected to power recovery in the internal field, and the output waveform of the external field ground power supply vehicle is simulated to test the monitor products, find out the reason that the monitor products frequently fail in the external field, facilitate product improvement and finally achieve the purpose of reducing the external field use failure rate of the products.
The technical scheme of the invention is as follows:
the aircraft ground power supply monitor testing method based on semi-physical simulation comprises the following steps:
step 1: collecting an output waveform image of a ground power supply vehicle when a ground power supply monitor product outfield has fault protection moment;
step 2: processing the waveform image by adopting software with an image processing function to obtain waveform data for realizing the restoration of the output waveform of the ground power supply vehicle and realizing the output from the waveform image to the simulation waveform;
and step 3: and (3) outputting the simulated waveform obtained in the step (2) to power amplification equipment, and performing power connection on the power amplification equipment and a ground power supply monitor product to realize power output of the waveform test of the ground power supply vehicle and finish the output characteristic test of the in-field simulated ground power supply monitor product when the ground power supply vehicle suddenly applies a variable voltage rectification type load.
Further, in step 1, the output waveform image of the ground power supply vehicle when the ground power supply monitor product is subjected to fault protection at the moment when the ground power supply vehicle suddenly adds the reshaping load is collected.
Further, in step 1, enhancement processing is performed on the acquired waveform image.
Further, in 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 type 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 outputting the data in a working space of the MATLAB software in a simulation model mode by using a data processing function of the MATLAB software to realize the output from a waveform image to a simulation waveform.
Further, in step 2, when the data realizes the output of the simulation waveform in the form of the simulation model, the normal waveform is obtained by calculating the phase and amplitude of the waveform, and the jump waveform is obtained by data extraction.
Furthermore, the semi-physical simulation system comprises a real-time simulation system, an IO interface box and a power amplification device, wherein the real-time simulation system realizes the output of simulation waveforms and outputs the simulation waveforms to the power amplification device by using the IO interface box.
Advantageous effects
The invention can complete the power test of ground power supply monitor products in an internal field, and realize the auxiliary fault analysis and product improvement of monitor products according to the test result. Meanwhile, the testing method based on the semi-physical simulation system is also suitable for the design of controller products, the output waveforms of the controlled objects under various limit conditions can be realized through programming at the initial stage of product design, the semi-physical simulation system is used for outputting, the tests under various limit conditions in the controller products are realized, product designers can be assisted to design and improve the products, 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block diagram of a semi-physical simulation system;
FIG. 2 is the output waveform of an outfield ground power supply vehicle at the moment of accessing a variable voltage rectification type load;
FIG. 3 is a ground power cart transient waveform output in MATLAB working space using scatter points;
fig. 4 is a simulation model built in MATLAB/simulink, which can output waveforms of the ground power supply vehicle under normal conditions, and realize the conversion of fault transient waveforms and the continuous real-time output of the waveforms through the switching of the switch, and the simulation waveforms are power-connected with monitor products after signal conditioning of the IO interface box and output of the power amplifier, and can realize the power test of the ground power supply monitor.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, and not to be construed as limiting the invention.
The embodiment realizes power restoration in the field through the waveform of the ground power supply vehicle of the external field, simulates the output waveform of the ground power supply vehicle of the external field, tests monitor products and assists the monitor products in fault analysis.
In the use of an external field, a ground power supply causes monitor protection at the moment of suddenly adding an integer load, for the situation, firstly, equipment such as an oscilloscope and the like is used for acquiring an output waveform image of the ground power supply vehicle at the moment of fault protection of the monitor in the external field, the waveform image (in a jpg format) is subjected to enhancement processing to enable the image output to be clearer, relevant processing software such as image processing functions of MATLAB and the like are used for realizing the restoration of the instantaneous waveform of the ground power supply vehicle using a voltage transformation rectifier type 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 (xlsx), as shown in table 1, the table 1 is the three-phase output voltage value of the ground power supply vehicle at different time after the output waveform enhancement processing, and the table 1 is only partial data due to large data volume; and outputting the data in a working space of the simulation model by utilizing a 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, because the waveform of the outfield ground power supply vehicle is continuously output when the outfield ground power supply vehicle works, if the graphic data are completely restored in simulation, the data volume is overlarge, and the power supply vehicle only generates output voltage waveform jump instantly when a variable voltage rectification type load is used, during simulation output, only the jump waveform is subjected to data extraction, and the normal output waveform is obtained by calculating the phase and amplitude of the waveform. The method is characterized in that a normal power supply vehicle waveform obtained through phase and amplitude calculation is output at the beginning of simulation, when the output voltage waveform jumps at a certain moment, the jump waveform is output to simulate the addition of a variable voltage rectification type load, and then the power supply vehicle waveform obtained through phase and amplitude calculation is normally output, so that the continuous output of the power supply vehicle waveform can be ensured, and the continuous output of the ground power supply vehicle waveform in MATLAB/Simulink software is finally realized.
The semi-physical simulation system generally comprises a real-time simulation system, an IO interface box and a power amplification device, in the embodiment, the waveform of the ground supply vehicle output by MATLAB/Simulink software is processed in real time and downloaded to a real-time simulation machine for simulation, the IO interface box is output to the power amplification device, the power amplification device realizes the power output of the waveform test of the ground supply vehicle and is in power connection with a ground supply monitor product, and the output characteristic test of the analog monitor product in the field on the external ground supply vehicle sudden-voltage-variable rectification type load is completed. The testing method can output various waveforms which can cause the ground power supply monitor to have faults in real time through waveform restoration, waveform programming and the like based on a semi-physical simulation system, and form a semi-physical simulation waveform testing unit for testing the ground power supply monitor.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (6)
1. A plane ground power supply monitor testing method based on semi-physical simulation is characterized in that: the method comprises the following steps:
step 1: collecting an output waveform image of a ground power supply vehicle when a ground power supply monitor product outfield has fault protection moment;
step 2: processing the waveform image by adopting software with an image processing function to obtain waveform data for realizing the restoration of the output waveform of the ground power supply vehicle and realizing the output from the waveform image to the simulation waveform;
and step 3: and (3) outputting the simulated waveform obtained in the step (2) to power amplification equipment, and performing power connection on the power amplification equipment and a ground power supply monitor product to realize power output of the waveform test of the ground power supply vehicle and finish the output characteristic test of the in-field simulated ground power supply monitor product when the ground power supply vehicle suddenly applies a variable voltage rectification type load.
2. The aircraft ground power supply monitor testing method based on semi-physical simulation is characterized in that: in the step 1, the output waveform image of the ground power supply vehicle is collected when the ground power supply monitor product is subjected to fault protection at the moment when the ground power supply vehicle suddenly adds the reshaping load.
3. The aircraft ground power supply monitor testing method based on semi-physical simulation is characterized in that: in step 1, enhancement processing is performed on the acquired waveform image.
4. The aircraft ground power supply monitor testing method based on semi-physical simulation is characterized in that: 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 type 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 outputting the data in a working space of the MATLAB software in a simulation model mode by using a data processing function of the MATLAB software to realize the output from a waveform image to a simulation waveform.
5. The aircraft ground power supply monitor testing method based on semi-physical simulation is characterized in that: in the step 2, when the data realizes the output of the simulation waveform in the form of a simulation model, the normal waveform is obtained by calculating the phase and the amplitude of the waveform, and the jump waveform is obtained by extracting the data.
6. The aircraft ground power supply monitor testing method based on semi-physical simulation is characterized in that: the semi-physical simulation system comprises a real-time simulation system, an IO interface box and a power amplification device, wherein the real-time simulation system realizes the output of simulation waveforms and outputs the simulation waveforms to the power amplification device by using the IO interface box.
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