CN117031161A

CN117031161A - Multi-agent technology-based automatic test method for airborne converter

Info

Publication number: CN117031161A
Application number: CN202310998127.6A
Authority: CN
Inventors: 罗运虎; 吕启航; 陈文明
Original assignee: Nanjing University of Aeronautics and Astronautics
Current assignee: Nanjing University of Aeronautics and Astronautics
Priority date: 2023-08-08
Filing date: 2023-08-08
Publication date: 2023-11-10
Anticipated expiration: 2043-08-08
Also published as: CN117031161B

Abstract

The application discloses an automatic test method of an airborne converter based on a multi-agent technology, which relates to the field of airborne converters.

Description

Multi-agent technology-based automatic test method for airborne converter

Technical Field

The application relates to the technical field of airborne converters, in particular to an automatic test method of an airborne converter based on a multi-agent technology.

Background

The on-board converter is an important device for bearing electric energy conversion in an aircraft secondary power supply system, the function of the on-board converter is critical to the flight safety of an aircraft, once the on-board converter fails, each device on the aircraft loses the power supply reliability, so that each module of the aircraft works abnormally, the types and the number of the on-board converters carried by the aircraft are increased along with the continuous development of a multi-electric aircraft, and the reliability requirements of the on-board converters are also improved continuously, so that the performance test of the on-board converters to ensure the working reliability of the on-board converters is critical.

In recent years, the test of the on-board converter is always one of the enthusiasts, and the test of the on-board converter is mainly performed manually by using various meters at present, but the test method has low test efficiency, needs to consume a great deal of manpower and time, needs to manually judge the test result and requires the operator to have abundant operation experience, so that the accuracy and reliability of the test result are difficult to ensure, the test means of the existing test method are single, the universality and expansibility are poor, and the degree of automation is low.

Disclosure of Invention

Aiming at the problems and the technical requirements, the inventor provides an automatic test method of an airborne converter based on a multi-agent technology, and the technical scheme of the application is as follows:

an automatic test method of an airborne converter based on a multi-agent technology comprises the following steps:

building a test platform, wherein the test platform comprises an industrial personal computer, a multi-agent control unit, a test resource unit and a power switching unit, the industrial personal computer is connected and controls the multi-agent control unit and the test resource unit through a multi-bus, and the multi-agent control unit is connected and controls the on-off of each power switching device contained in the power switching unit; the test resource unit comprises an AC/DC program-controlled power supply, an AC/DC program-controlled load and a parameter acquisition unit; the test platform is led out of an input test port and an output test port, an alternating current/direct current programmable power supply is connected to the input test port, an alternating current/direct current programmable load is connected to the output test port, and each port pin of the input test port and each port pin of the output test port are respectively connected to the parameter acquisition unit; a power switching device is respectively arranged on the transmission path between each test resource unit and the corresponding port pin so as to control the on-off of the transmission path;

The method comprises the steps that all port pins of an input test port of a test platform are correspondingly connected with all port pins of an input test port of an airborne converter to be tested respectively, and all port pins of an output test port of the test platform are correspondingly connected with all port pins of an output test port of the airborne converter to be tested respectively;

the test platform is utilized to automatically test the electrical performance of the airborne converter to be tested: the industrial personal computer acquires a test task, generates a test instruction according to the test task, sends the test instruction to the multi-agent control unit and the corresponding test resource unit, the multi-agent control unit controls the on-off of each power switching device by utilizing a multi-agent technology according to the received test instruction so as to conduct a transmission channel matched with the test task, the AC/DC programmable power supply and the AC/DC programmable load respectively adjust test parameters according to the received test instruction, the parameter acquisition unit acquires performance parameters according to the received test instruction and feeds the performance parameters back to the industrial personal computer, and the industrial personal computer gathers the performance parameters fed back by the parameter acquisition unit to obtain test data of the on-board converter to be tested.

The alternating current-direct current programmable power supply comprises an alternating current programmable power supply and a direct current programmable power supply, wherein the alternating current programmable power supply is connected to the input test port through a power switching device, and the direct current programmable power supply is connected to the input test port through the power switching device; the alternating current programmable power supply is used for providing alternating current power supply for the input test port belonging to the alternating current port, and the direct current programmable power supply is used for providing direct current power supply for the input test port belonging to the direct current port;

The AC/DC program-controlled load comprises an AC program-controlled load and a DC program-controlled load, and the output test port is respectively connected with the AC program-controlled load and the DC program-controlled load through a power switching device; the alternating current program controlled load is used for providing alternating current load for the output test port belonging to the alternating current port, and the alternating current program controlled load is also used for providing direct current load for the output test port belonging to the direct current port;

the parameter acquisition unit comprises a digital multimeter and a power analyzer, wherein the positive electrode of the digital multimeter is connected with the input test port and each port pin of the output test port through different power switching devices respectively, and the negative electrode of the digital multimeter is connected with each port pin of the input test port and each port pin of the output test port through different power switching devices respectively; the power analyzer is connected with the input test port and the output test port through different power switching devices respectively.

The further technical scheme is that the automatic test of the electrical performance of the airborne converter to be tested by using the test platform comprises the following steps:

the industrial personal computer decomposes the acquired test task aiming at the airborne converter to be tested into a plurality of test subtasks, generates a corresponding test instruction according to each test subtask, and sends the corresponding test instruction to the multi-agent control unit and a corresponding test resource unit to perform a corresponding automatic test on the electrical performance, wherein the types of the automatic test on the electrical performance of the airborne converter to be tested comprise a pin conductivity test, an idle load test, a load adjustment test and a voltage adjustment test;

The pin conductivity test is used for respectively testing the conduction condition between different port pins of the input test port and the output test port of the airborne converter to be tested on the basis that the input test port of the airborne converter to be tested is not provided with power supply;

the no-load test is used for testing performance parameters of the airborne converter to be tested under different input voltages under the condition that the output test port is no-load on the basis of providing input voltage for the input test port of the airborne converter to be tested;

the load adjustment test is used for testing performance parameters of the airborne converter to be tested under the conditions that the same input voltage is provided for the input test port of the airborne converter to be tested and the output test port has different loads on the basis of providing the input voltage for the input test port of the airborne converter to be tested;

the voltage adjustment test is used for testing performance parameters of the on-board converter to be tested under different input voltages under the condition that the output test port has rated load on the basis of providing input voltage for the input test port of the on-board converter to be tested.

The further technical scheme is that the pin conductivity test of the airborne converter to be tested by using the test platform comprises the following steps:

the industrial personal computer generates a first test instruction according to the first type of test subtasks and transmits the first test instruction to the multi-agent control unit and the digital multimeter;

The multi-agent control unit controls the on-off of the power switching device by utilizing a multi-agent technology according to the received first test instruction so as to sequentially configure and form a plurality of different conduction test links between the positive electrode and the negative electrode of the digital multimeter, and the digital multimeter respectively obtains the resistance value from the positive electrode to the negative electrode through each conduction test link according to the received first test instruction and feeds the resistance value back to the industrial personal computer;

when each conduction test link is configured and formed, the multi-agent control unit controls the conduction of the power switching device on the transmission path from the positive electrode of the digital multimeter to one of the port pins, controls the conduction of the power switching device on the transmission path from the negative electrode of the digital multimeter to one of the port pins, and controls the disconnection of all other power switching devices so as to configure and form one conduction test link between the positive electrode and the negative electrode of the digital multimeter; the two port pins through which each conductive test link passes are two different port pins in the input test port, or two different port pins in the output test port, or one port pin in the input test port and one port pin in the output test port.

The further technical scheme is that the no-load test of the airborne converter to be tested by using the test platform comprises the following steps:

the industrial personal computer generates a second test instruction according to the second type of test subtask and transmits the second test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

the multi-agent control unit controls the connection of the power switching device on the transmission path from the AC/DC program-controlled power supply to the input test port, controls the connection of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing a multi-agent technology according to the received second test command;

the AC/DC programmable power supply sequentially adjusts input voltages provided for the input test ports according to the received second test instructions, and under each input voltage, the power analyzer respectively acquires the performance parameters of the current voltage signals of the input test ports and the performance parameters of the current voltage signals of the output test ports according to the received second test instructions and feeds the performance parameters back to the industrial personal computer; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

The further technical scheme is that the load adjustment test of the airborne converter to be tested by using the test platform comprises the following steps:

the industrial personal computer generates a third test instruction according to the third type of test subtask and transmits the third test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

the multi-agent control unit controls the conduction of a power switching device on a transmission path from the AC/DC program-controlled power supply to the input test port, controls the conduction of a power switching device on a transmission path from the AC/DC program-controlled load to the output test port, controls the conduction of a power analyzer and the power switching device on the transmission path from the input test port, controls the conduction of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing a multi-agent technology according to the received third test command;

the AC/DC program-controlled power supply sequentially adjusts the input voltage provided for the input test port according to the received third test command, under the condition that the input voltage is kept unchanged, the AC/DC program-controlled load sequentially adjusts the load value according to the received third test command to change the load condition of the output test port, and under each load value, the power analyzer respectively acquires the performance parameters of the current voltage signal of the input test port and the performance parameters of the current voltage signal of the output test port according to the received third test command and feeds the performance parameters back to the industrial personal computer; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

The further technical scheme is that the voltage adjustment test of the airborne converter to be tested by using the test platform comprises the following steps:

the industrial personal computer generates a fourth test instruction according to the fourth test subtask and transmits the fourth test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

the multi-agent control unit controls the conduction of a power switching device on a transmission path from the AC/DC program-controlled power supply to the input test port, controls the conduction of a power switching device on a transmission path from the AC/DC program-controlled load to the output test port, controls the conduction of a power analyzer and the power switching device on the transmission path from the input test port, controls the conduction of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing a multi-agent technology according to the received fourth test command;

the AC/DC programmable load is adjusted to the rated load of the on-board converter to be tested according to the received fourth test instruction, under the condition of keeping the rated load, the AC/DC programmable power supply sequentially adjusts the input voltage provided for the input test port according to the received fourth test instruction, and under each input voltage, the power analyzer respectively acquires the performance parameters of the current voltage signal of the input test port and the performance parameters of the current voltage signal of the output test port according to the received fourth test instruction and feeds back the performance parameters to the industrial personal computer; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

The further technical scheme is that the automatic test method of the airborne converter further comprises the following steps:

and before the test platform is used for automatically testing the electrical performance of the airborne converter to be tested, the test platform is in butt joint with the sample airborne converter, and the sample airborne converter is used for performing functional verification on the test platform.

The further technical scheme is that the function verification of the test platform comprises the following steps: verifying whether the conduction resistance value of the internal circuit of the multi-agent control unit meets the corresponding requirement, verifying whether the resistance value of the internal power switching device of the power switching unit meets the corresponding requirement, verifying whether the test platform can identify sample airborne converters of different models, verifying whether the current regulation error realized by the AC/DC program-controlled load meets the corresponding requirement, and verifying whether the electrical performance automatic test accuracy of the test platform on the sample airborne converters meets the corresponding requirement.

The test platform further comprises a man-machine interaction module, wherein the man-machine interaction module is in communication connection with the industrial personal computer;

the industrial personal computer responds to the configuration information obtained by the man-machine interaction module, and configures the test platform according to the configuration information; the industrial personal computer also displays test data of the to-be-tested airborne converter in real time through the man-machine interaction module, wherein the test data comprises configured test parameters, and the corresponding collected performance parameters and test attribute information.

The beneficial technical effects of the application are as follows:

the application discloses an automatic test method of an airborne converter based on a multi-agent technology, which comprises the steps of establishing a test platform, butting the test platform with the airborne converter to be tested, controlling a plurality of test resource units by an industrial personal computer almost simultaneously, completing test tasks according to configured test logic, realizing automatic test parameter configuration and performance data acquisition, having high automation degree and high test efficiency, effectively solving the problem of automatic test of the airborne converter, having good application prospect, realizing high-efficiency test of various airborne converters, having strong universality and expansibility, displaying and storing test data after the test is completed, and reducing the time of manual recording.

Drawings

Fig. 1 is a schematic diagram of a centralized automatic test framework of the existing automatic test theory.

FIG. 2 is a schematic structural diagram of a test platform constructed in accordance with the present application.

FIG. 3 is a software architecture diagram of test logic of the test platform design constructed in accordance with the present application.

FIG. 4 is a graph showing the variation of the three-phase input average current with load at different input voltages obtained by summarizing the automatic test performed by the test platform according to the present application in one test example of the present application.

FIG. 5 is a graph showing the variation of the three-phase maximum current difference with load at different input voltages obtained by summarizing the automatic test performed by the test platform according to the present application in one test example of the present application.

Fig. 6 is a graph showing the variation of input current THD with load at different input voltages obtained by summarizing the automatic test performed by the test platform according to the present application in one test example of the present application.

FIG. 7 is a graph showing the output voltage at different input voltages with load obtained by summarizing the automatic test performed by the test platform according to the present application, in a test example of the present application.

FIG. 8 is a graph showing the variation of output voltage ripple with load at different input voltages obtained by summarizing the automatic test performed by the test platform according to the present application in one test example of the present application.

Detailed Description

The following describes the embodiments of the present application further with reference to the drawings.

The application discloses an automatic test method of an airborne converter based on a multi-agent technology, which is completed based on a built test platform, wherein the built test framework of the test platform is unfolded based on an automatic test theory, and the common test framework of the automatic test theory mainly comprises a centralized automatic test framework and a distributed automatic test framework, wherein the centralized automatic test framework comprises a plurality of distributed automatic test frameworks, and the distributed automatic test framework comprises a plurality of distributed automatic test frameworks: the centralized automatic test framework has the advantages of high integration level and simple structure, but has higher performance requirements on a test host, and is mainly used for constructing small and medium-sized automatic test systems. The distributed automatic test framework reduces the performance requirement on a test host through distributed design, is convenient for transverse expansion, but has complex design, needs to consider the instantaneity of communication among different sites, and is mainly used for constructing a large or ultra-large automatic test system. Considering the test requirement of the airborne converter, the application builds the test platform according to the centralized automatic test framework based on the automatic test theory.

The centralized automatic test framework mainly comprises three parts, namely an automatic test system ATE, a test program set TPS and a software development tool, and referring to the framework structure diagram shown in fig. 1, the software development tool provides a development environment for performing test logic design. The test program set TPS is the basis for implementing control of the automatic test system ATE for designing test logic with a software development tool. The automatic test system ATE is used for controlling according to the designed test logic to realize the test.

The application builds a test platform for automatic test of an airborne converter according to the structure of a centralized automatic test framework, and the framework of an automatic test system ATE of the test platform is shown in figure 2 and comprises an industrial personal computer, a multi-agent control unit, a test resource unit and a power switching unit. The following are introduced respectively:

(1) The industrial personal computer is a core for realizing control and operation of the whole test platform, and can be realized by PC or embedded processor such as ARM and FPGA.

(2) The multi-agent control unit is a device for performing multi-agent technology.

(3) The test resource unit is used for butting the airborne converter to be tested, providing excitation for the airborne converter to be tested and realizing data acquisition of the airborne converter to be tested according to the instruction of the industrial personal computer, and comprises three types according to the test requirement of the airborne converter: the test resource units need to be respectively connected to the airborne converter to be tested in a butt joint mode.

In order to facilitate the butt joint of the components in the test platform and the airborne converter to be tested, the input test port Din and the output test port Dout are led out of the test platform, the input test port Din of the test platform is used for butt joint of the input test port Din of the airborne converter to be tested, and the output test port Dout of the test platform is used for butt joint of the output test port Dout of the airborne converter to be tested. The input test port comprises a plurality of port pins, the output test port comprises a plurality of port pins, and the number of the port pins contained in each test port is determined according to the type of the test port. For example, when the on-board converter to be tested is a transformer rectifier, the input test ports of the test platform and the on-board converter to be tested are respectively ac ports including three port pins, and the output test ports of the test platform and the on-board converter to be tested are respectively dc ports including two port pins, as illustrated in fig. 2.

In the test platform, the test resource units are all connected to the corresponding test ports, so as to be connected to the corresponding test ports in the on-board converter to be tested, and then:

the AC/DC programmable power supply is connected to an input test port of the test platform and is used for providing input voltage for the input test port of the on-board converter to be tested through the input test port. In one embodiment, the ac-dc programmable power supply includes an ac programmable power supply for providing an ac power supply to the input test port belonging to the ac port and a dc programmable power supply for providing a dc power supply to the input test port belonging to the dc port to improve applicability.

The output test port is connected with an AC/DC program control load and used for adjusting the load condition of the output test port of the airborne converter to be tested. In one embodiment, the ac-dc programming load comprises an ac programming load and a dc programming load, the ac programming load is used to provide an ac load to the output test port belonging to the ac port, the ac programming load is also used to provide a dc load to the output test port belonging to the dc port, and as such, the ac programming load is used to improve the applicability.

The input test port and the output test port are respectively connected to the parameter acquisition unit through the port pins, so that the parameter acquisition unit can acquire signals of the input test port and the output test port of the airborne converter to be tested, and the performance parameters of the airborne converter to be tested can be determined. In one embodiment, the parameter acquisition unit comprises a digital multimeter and a power analyzer, wherein the positive electrode of the digital multimeter is respectively connected with the port pins of the input test port and the output test port, and the negative electrode of the digital multimeter is respectively connected with the port pins of the input test port and the output test port. The power analyzer is connected with the input test port and the output test port.

(3) The power switching unit includes a plurality of power switching devices including relays and contactors. And a power switching device is respectively arranged on the transmission path between each test resource unit and the corresponding port pin so as to control the on-off of the transmission path, and when the power switching device is disconnected, the transmission on-off where the power switching device is positioned is disconnected, so that the test resource unit cannot excite the airborne converter to be tested or realize data acquisition. When the power switching device is conducted, the transmission on-off where the power switching device is located is conducted, and then the test resource unit cannot apply excitation to the airborne converter to be tested or realize data acquisition. Comprising the following steps: the alternating current programmable power supply is connected to the input test port through the power switching device, and the direct current programmable power supply is connected to the input test port through the power switching device. The output test port is connected with an alternating current program control load and a direct current program control load through a power switching device respectively. The positive pole of the digital multimeter is connected with the pins of each of the input test port and the output test port through different power switching devices respectively, and the negative pole of the digital multimeter is connected with the pins of each of the input test port and the output test port through different power switching devices respectively. The power analyzer is connected with the input test port and the output test port through different power switching devices respectively.

The industrial personal computer is connected with and controls the multi-agent control unit and the test resource unit through the multi-bus, and the multi-agent control unit is connected with and controls the on-off of each power switching device contained in the power switching unit. The multiple buses used herein include USB, PCI, TCP, RS and other buses, depending on the communication protocol used by the unit. In one embodiment, as shown in fig. 2, the industrial personal computer is connected to the multi-agent control unit through a DB25 cable so that an instruction can be transmitted to the multi-agent control unit. The industrial personal computer is connected with the alternating current programmable power supply through a USB-to-RS 232 connecting line to realize two-way communication, so that the industrial personal computer can send instructions to the alternating current programmable power supply, and the alternating current programmable power supply can return provided input voltage to the industrial personal computer. The industrial personal computer is connected with the direct-current programmable power supply through the USB connecting wire to realize two-way communication, so that the industrial personal computer can send instructions to the direct-current programmable power supply, and the direct-current programmable power supply can return provided input voltage to the industrial personal computer. The industrial personal computer is connected with the alternating current program-controlled load through a USB-to-RS 232 connecting line to realize two-way communication, so that the industrial personal computer can send a command to the alternating current program-controlled load, and the alternating current program-controlled load can return a configured load value to the industrial personal computer. The industrial personal computer is connected with the direct-current program-controlled load through the USB connecting wire to realize bidirectional communication, so that the industrial personal computer can send a command to the direct-current program-controlled load, and the direct-current program-controlled load can return a configured load value to the industrial personal computer. The industrial personal computer is connected with the digital multimeter through the USB connecting wire, so that the industrial personal computer can send instructions to the digital multimeter, and the digital multimeter can return collected performance data to the industrial personal computer. The industrial personal computer is connected with the power analyzer through the TCP connecting wire, so that the industrial personal computer can send instructions to the power analyzer, and the power analyzer can return collected performance data to the industrial personal computer.

From the above description, it can be seen that in the test platform built by the present application, the automatic test system ATE partially realizes a three-layer structure, namely, a management layer, a coordination layer and an execution layer. (a) The management layer is an industrial personal computer, is a core of the whole test platform, is responsible for planning and arranging test tasks, and is finally responsible for data arrangement and storage. The management layer transmits commands to the cooperative layer through various bus protocols, and the scheduling of communication of all buses is coordinated, so that all test resources are reasonably scheduled according to designed test logic. (b) The collaboration layer comprises a multi-agent control unit and a test resource unit, and is in charge of communicating with the management layer to receive instructions of the management layer, the multi-agent control unit and the test resource unit analyze the instructions of the industrial personal computer through a communication protocol, and then the test resource unit adjusts excitation and load according to the instructions and performs data acquisition. The multi-agent control unit performs decoding operation by the FPGA according to the self-defined PCI communication protocol, and after decoding, signals are output to the execution layer through the driving circuit by changing the level of the I/O port, so that the execution layer is further controlled, and strong and weak electric isolation is realized. (c) The execution layer is a power switching unit, the inside of the execution layer is composed of a large number of relays and contactors, the switching of transmission paths between the airborne converter to be tested and various test resource units is realized through reasonable design, and meanwhile, the inside of the power switching unit is also required to have the functions of relay and contactor self-checking in order to improve the failure rejection efficiency of the layer after the failure.

In addition, the test platform also comprises a man-machine interaction module, wherein the man-machine interaction module is in communication connection with the industrial personal computer, and provides a man-machine interaction interface for realizing data input and real-time display.

The software development tool of the built test platform uses Visual C++6.0 development tool, the design of human-computer interaction interface is carried out by utilizing the MFC framework, in the test process, corresponding control and transmission of reading instructions are carried out by corresponding function functions in the human-computer interaction interface, and after relevant test data are obtained, the software needs to display, analyze and store the data.

The test logic designed by the TPS in the built test platform is a core for realizing automatic test by utilizing the test platform, all test resource units and power switching units are driven through software design, programming and development, and high-efficiency system function test is completed, a set of logic is clear, and executing high-efficiency test logic is a key for realizing high-efficiency automatic test. Based on the design idea of layered software from top to bottom, the software application layer designs the test function of each test task, and through multi-thread programming, data sharing among all modules is ensured, and software execution efficiency is improved, wherein each test thread can call bus protocol functions such as PCI, USB and the like, and then the bus protocol function calls the driving function of the corresponding bus, thereby realizing the simplicity and reliability of codes and facilitating the maintenance of subsequent codes. In addition, in order to help the testers to perform automatic test, a man-machine interaction interface is also required to be designed, and the corresponding functional functions such as test and identification are correspondingly placed in the corresponding interfaces. The test logic designed by the test platform will be described in detail in the course of the subsequent description of the automatic test method.

After the test platform is built, each port pin of an input test port of the test platform is correspondingly connected with each port pin of an input test port of the airborne converter to be tested, each port pin of an output test port of the test platform is correspondingly connected with each port pin of an output test port of the airborne converter to be tested, and the butt joint of the test platform and the airborne converter to be tested is realized.

Then, the test platform can be used for automatically testing the electrical performance of the airborne converter to be tested, and the whole test process is as follows: the industrial personal computer acquires the test task, generates a test instruction according to the test task, and transmits the test instruction to the multi-agent control unit and the corresponding test resource unit, and the multi-agent control unit controls the on-off of each power switching device by utilizing the multi-agent technology according to the received test instruction so as to conduct a transmission channel matched with the test task. The AC/DC program-controlled power supply and the AC/DC program-controlled load respectively adjust the test parameters according to the received test instructions, and the parameter acquisition unit acquires the performance parameters according to the received test instructions and feeds the performance parameters back to the industrial personal computer.

Based on the testing process, according to different testing contents of the airborne converter to be tested, the industrial control machine can decompose the acquired testing task aiming at the airborne converter to be tested into a plurality of testing subtasks, and generate a corresponding testing instruction according to each testing subtask and send the corresponding testing instruction to the multi-agent control unit and the corresponding testing resource unit so as to perform a corresponding automatic electrical performance test. The types of automatic electrical performance testing performed by the on-board converter to be tested include the following:

(1) Pin conductivity testing.

The pin conductivity test is used for respectively testing the conduction condition between different port pins of the input test port and the output test port of the airborne converter to be tested on the basis that the input test port of the airborne converter to be tested is not provided with power supply.

Each subsequent test is unfolded after the on-board converter to be tested is electrified, and the test is firstly carried out before the on-board converter to be tested is electrified, so that the conductivity among different port pins of the on-board converter to be tested is mainly tested, the on-board converter to be tested is prevented from being electrified and damaged due to short circuit among the port pins, and the safety of the subsequent on-board converter to be tested is ensured.

Taking a test subtask for realizing pin conductivity test as a first type of test subtask, and carrying out pin conductivity test on the airborne converter to be tested by using the test platform comprises the following steps:

and the industrial personal computer generates a first test instruction according to the first test subtask and transmits the first test instruction to the multi-agent control unit and the digital multimeter.

The multi-agent control unit controls the on-off of the power switching device by utilizing a multi-agent technology according to the received first test instruction so as to sequentially configure and form a plurality of different conduction test links between the positive electrode and the negative electrode of the digital multimeter, the digital multimeter respectively obtains the resistance value from the positive electrode to the negative electrode through each conduction test link according to the received first test instruction and feeds the resistance value back to the industrial personal computer, the industrial personal computer detects whether the resistance value corresponding to each received conduction test link meets the corresponding test criterion, and then a test result aiming at the conduction test link can be obtained, wherein the test result indicates that the test is passed, no short circuit exists between two port pins on the conduction test link, or the test result indicates that the test is not passed and the short circuit exists between two port pins on the conduction test link.

When each conduction test link is configured and formed, the multi-agent control unit controls the conduction of the power switching device on the transmission path from the positive electrode of the digital multimeter to one of the port pins, controls the conduction of the power switching device on the transmission path from the negative electrode of the digital multimeter to one of the port pins, and controls the disconnection of all other power switching devices, so that one conduction test link is configured and formed between the positive electrode and the negative electrode of the digital multimeter.

The two port pins through which each conductive test link passes are two different port pins in the input test port, or two different port pins in the output test port, or one port pin in the input test port and one port pin in the output test port. That is, the pin conductivity test can be used to test the conductivity between the port pins of the input test port and the port pins of the output test port, and also used to test the conductivity between different port pins of the input test port and also used to test the conductivity between different port pins of the output test port.

For example, taking a to-be-tested onboard converter as an example of a transformer rectifier of a certain model, an input test port of the transformer rectifier is an alternating current port and comprises a port pin A, a port pin B and a port pin C, and an output test port of the transformer rectifier is a direct current port and comprises an anode port pin +28V and a cathode port pin-28V. Then when the transformer rectifier is tested for pin conductivity, the test contents and results are as follows:

(2) And (5) no-load testing.

The no-load test is used for testing performance parameters of the on-board converter to be tested under different input voltages under the condition that the output test port is no-load on the basis of providing input voltage for the input test port of the on-board converter to be tested. The no-load test of the airborne converter to be tested can check the characteristics of the airborne converter to be tested such as the working loss of the airborne converter to be tested.

Taking the test subtask for realizing the no-load test as a second class of test subtask, and carrying out no-load test on the airborne converter to be tested by using the test platform comprises the following steps:

and the industrial personal computer generates a second test instruction according to the second type of test subtasks and transmits the second test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer.

The multi-agent control unit controls the connection of the power switching device on the transmission path from the AC/DC program-controlled power supply to the input test port, controls the connection of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing the multi-agent technology according to the received second test command.

The AC/DC programmable power supply sequentially adjusts the input voltage provided for the input test port according to the received second test command. Under each input voltage, the power analyzer respectively acquires the performance parameters of the current voltage signals of the input test port and the performance parameters of the current voltage signals of the output test port according to the received second test instruction, and feeds the performance parameters back to the industrial personal computer.

The performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

In the no-load adjustment test process, the inspection of phase sequence and waveform is added, so that the quality of the input waveform and the output waveform of the airborne converter to be tested can be tested. For the transformer rectifier, the phase sequence and waveform inspection are mainly embodied as the input current phase sequence and waveform inspection, for the phase sequence inspection, the phase difference among the port pins AB, BC and CA is read by the power analyzer to judge, and for the waveform inspection, the three-phase input current waveform displayed by the power analyzer is tested.

In addition to phase sequence and waveform, other parameters related to the waveform are tested, the three-phase imbalance can be characterized by the maximum current difference acquired, and the total harmonic content can be characterized by THD.

(3) And (5) load adjustment test.

The load adjustment test is used for testing performance parameters of the on-board converter to be tested under the conditions that the same input voltage is provided for the input test port of the on-board converter to be tested and the output test port has different loads on the basis of providing the input voltage for the input test port of the on-board converter to be tested. The output voltage of the on-board converter varies with the load condition of the output end, and the load condition of the on-board converter often varies during actual operation, so that the load adjustment test is required to be used for testing the load performance of the on-board converter to be tested.

Taking the test subtask for realizing the load test as a third class of test subtask, and carrying out load adjustment test on the on-board converter to be tested by using the test platform comprises the following steps:

the AC/DC program-controlled load sequentially adjusts the load value according to the received third test command to change the load condition of the output test port under the condition that the input voltage is kept unchanged, and the power analyzer respectively acquires the performance parameters of the current voltage signal of the input test port and the performance parameters of the current voltage signal of the output test port according to the received third test command and feeds back the performance parameters to the industrial personal computer under each load value.

The performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples. Similarly, during the load adjustment test, a phase sequence and waveform inspection is added, and a test for other parameters of the waveform is also added.

(4) And (5) voltage adjustment testing.

The voltage adjustment test is used for testing performance parameters of the on-board converter to be tested under different input voltages under the condition that the output test port has rated load on the basis of providing input voltage for the input test port of the on-board converter to be tested, and the voltage adjustment test can be used for testing whether the on-board converter to be tested has wide input capability.

Taking the test subtask for realizing the load test as a fourth type of test subtask, and carrying out voltage adjustment test on the on-board converter to be tested by using the test platform comprises the following steps:

The AC/DC programmable load is adjusted to the rated load of the on-board converter to be tested according to the received fourth test instruction, under the condition that the rated load is maintained, the AC/DC programmable power supply sequentially adjusts the input voltage provided for the input test port according to the received fourth test instruction, and under each input voltage, the power analyzer respectively acquires the performance parameters of the current voltage signal of the input test port and the performance parameters of the current voltage signal of the output test port according to the received fourth test instruction and feeds the performance parameters back to the industrial personal computer.

After the testing subtasks are completed, the industrial personal computer gathers the performance parameters fed back by the parameter acquisition units to obtain the testing data of the on-board converter to be tested, and can realize checking, storing, exporting and printing of the testing data, so that the data management is facilitated. The industrial personal computer also displays test data of the airborne converter to be tested in real time through the man-machine interaction module, wherein the test data comprises configured test parameters, corresponding collected performance parameters and test attribute information, and the test attribute information comprises a test task number, a test product part number, a tester, test time, test items, test progress and the like. The industrial personal computer can also respond to the configuration information acquired by the man-machine interaction module, and the test platform is configured according to the configuration information, such as test item selection, data viewing, software resetting and the like.

For the received performance parameters for the pin conductivity test, the industrial personal computer can display the resistance value of each conductive test link respectively. For the received performance parameters for no-load test, the industrial personal computer can display the change curve of the performance parameters of the current and voltage signals of the input test port along with the input voltage and the change curve of the performance parameters of the current and voltage signals of the output test port along with the input voltage respectively. For the received performance parameters for load adjustment test, the industrial personal computer can display the change curve of the performance parameters of the current voltage signal of the input test port along with the load condition under each input voltage, and the change curve of the performance parameters of the current voltage signal of the output test port along with the load condition under each input voltage. For the received performance parameters for the voltage adjustment test, the industrial personal computer can display the change curve of the performance parameters of the current voltage signal of the input test port with the input voltage at each input voltage, and the change curve of the performance parameters of the current voltage signal of the output test port with the input voltage at each input voltage.

For example, in one test example, load adjustment tests are performed on a model of transformer rectifier at 108V input voltage, 115V input voltage, and 118V input voltage, respectively:

the change curve of the three-phase average value (i.e. three-phase input average current) of the input current at each input voltage along with the load condition is shown in fig. 4, and as can be seen from fig. 4, the larger the load of the output test port is, the larger the three-phase input average current is under the same input voltage. Since the voltage adjustment amplitude of the input voltages is not large, the curves corresponding to the three input voltages almost coincide, which means that the variation amplitude of the three-phase input average current under different input voltages is not large under the same load condition.

The industrial personal computer obtains a three-phase imbalance (three-phase maximum current difference) change curve with the load condition under each input voltage in a summarizing way, as shown in fig. 5, and as can be seen from fig. 5, the three-phase maximum current difference changes with the load condition under the same input voltage and is not monotonically changed. The curve at the 115V input voltage and the curve at the 118V input voltage substantially overlap, and the curve with the 108V input voltage does not change much.

The industrial personal computer sums up the change curves of total harmonic content (THD) with load condition at each input voltage as shown in fig. 6, and it can be seen from fig. 6 that, at the same input voltage, THD decreases with load increase and is not monotonically changed. The voltage adjustment amplitude of the input voltages is not large, so that curves corresponding to the three input voltages almost coincide, which means that the variation amplitude of THD under different input voltages is not large under the same load condition.

The change curve of the output voltage at each input voltage along with the load condition is shown in fig. 7, and it can be seen from fig. 7 that the output voltage decreases along with the load increase at the same input voltage. The curves corresponding to the different input voltages are not overlapped, which means that the output voltages at the different input voltages are different under the same load condition.

The output voltage ripple at each input voltage is summarized to obtain a change curve of the output voltage ripple with the load condition as shown in fig. 8, and as can be seen from fig. 8, the output voltage ripple changes with the load change at the same input voltage, and the change is not monotonous. The curves corresponding to the different input voltages almost coincide, indicating that the output voltage ripple at the different input voltages is not very different under the same load.

The summarized test data are compared with the test criteria of the on-board converter to be tested, so that a test result of the on-board converter to be tested can be obtained, for example, in one example, the summarized test data of fig. 5, 7 and 8 are compared with the following test criteria, so that a corresponding test result can be obtained.

Load-carrying condition	Output voltage/V	Output voltage ripple/V	Three-phase maximum current difference/A
				No-load	26.4～32	<2.4V Peak to Peak value	/
10% load on belt	≤29.5V	<2.4V Peak to Peak value	<0.5A
				50% load on belt	27～30	<2.4V Peak to Peak value	<1.2A
100% load on tape	≥24.16	<2.4V Peak to Peak value	<1.2A
				150% load	/	<2.4V Peak to Peak value	/

In another embodiment, before the test platform is used for automatically testing the electrical performance of the on-board converter to be tested, the test platform is firstly in butt joint with the sample on-board converter, and the function of the test platform is verified by using the sample on-board converter. The function verification of the test platform comprises the following steps: verifying whether the conduction resistance value of the internal circuit of the multi-agent control unit meets the corresponding requirement, verifying whether the resistance value of the internal power switching device of the power switching unit meets the corresponding requirement, verifying whether the test platform can identify sample airborne converters of different models, verifying whether the current regulation error realized by the AC/DC program-controlled load meets the corresponding requirement, and verifying whether the electrical performance automatic test accuracy of the test platform on the sample airborne converters meets the corresponding requirement. So as to ensure the accurate and reliable work of the test platform. In the application, the resistances of the preset pins of the airborne converters with different models are different, and the resistances can be used for distinguishing and identifying the models of the airborne converters.

The above is only a preferred embodiment of the present application, and the present application is not limited to the above examples. It is to be understood that other modifications and variations which may be directly derived or contemplated by those skilled in the art without departing from the spirit and concepts of the present application are deemed to be included within the scope of the present application.

Claims

1. The automatic test method for the airborne converter based on the multi-agent technology is characterized by comprising the following steps of:

building a test platform, wherein the test platform comprises an industrial personal computer, a multi-agent control unit, a test resource unit and a power switching unit, the industrial personal computer is connected and controls the multi-agent control unit and the test resource unit through a multi-bus, and the multi-agent control unit is connected and controls the on-off of each power switching device contained in the power switching unit; the test resource unit comprises an AC/DC program-controlled power supply, an AC/DC program-controlled load and a parameter acquisition unit; the test platform is provided with an input test port and an output test port, the AC/DC programmable power supply is connected to the input test port, the output test port is connected with an AC/DC programmable load, and each port pin of the input test port and the output test port is respectively connected to the parameter acquisition unit; a power switching device is respectively arranged on a transmission path between each test resource unit and a corresponding port pin so as to control the on-off of the transmission path;

Each port pin of the input test port of the test platform is correspondingly connected with each port pin of the input test port of the airborne converter to be tested, and each port pin of the output test port of the test platform is correspondingly connected with each port pin of the output test port of the airborne converter to be tested;

and carrying out automatic electrical performance test on the to-be-tested airborne converter by using the test platform: the industrial personal computer acquires a test task, generates a test instruction according to the test task, and transmits the test instruction to the multi-agent control unit and the corresponding test resource unit, the multi-agent control unit controls the on-off of each power switching device by utilizing a multi-agent technology according to the received test instruction so as to conduct a transmission channel matched with the test task, the AC/DC programmable power supply and the AC/DC programmable load respectively adjust test parameters according to the received test instruction, the parameter acquisition unit acquires performance parameters according to the received test instruction and feeds the performance parameters back to the industrial personal computer, and the industrial personal computer gathers the performance parameters fed back by the parameter acquisition unit to obtain test data of the on-board converter to be tested.

2. The method for automatically testing an on-board converter according to claim 1, wherein,

the alternating current-direct current programmable power supply comprises an alternating current programmable power supply and a direct current programmable power supply, the alternating current programmable power supply is connected to the input test port through a power switching device, and the direct current programmable power supply is connected to the input test port through the power switching device; the alternating current programmable power supply is used for providing alternating current power supply for the input test port belonging to the alternating current port, and the direct current programmable power supply is used for providing direct current power supply for the input test port belonging to the direct current port;

the output test port is connected with the alternating current program controlled load and the direct current program controlled load through power switching devices respectively; the alternating current program controlled load is used for providing alternating current load for the output test port belonging to the alternating current port, and the alternating current program controlled load is also used for providing direct current load for the output test port belonging to the direct current port;

the parameter acquisition unit comprises a digital multimeter and a power analyzer, wherein the positive electrode of the digital multimeter is connected with each port pin of the input test port and each port pin of the output test port through different power switching devices respectively, and the negative electrode of the digital multimeter is connected with each port pin of the input test port and each port pin of the output test port through different power switching devices respectively; the power analyzer is connected with the input test port and the output test port through different power switching devices respectively.

3. The method for automatically testing an on-board converter according to claim 2, wherein the automatically testing the electrical performance of the on-board converter to be tested by using the test platform comprises:

the industrial personal computer decomposes the acquired test task for the airborne converter to be tested into a plurality of test subtasks, generates corresponding test instructions according to each test subtask, and sends the corresponding test instructions to the multi-agent control unit and the corresponding test resource units to perform corresponding automatic test on one electric performance, wherein types of the automatic test on the electric performance completed by the airborne converter to be tested comprise pin conductivity test, no-load test, load adjustment test and voltage adjustment test;

the no-load test is used for testing performance parameters of the to-be-tested airborne converter under different input voltages under the condition that the output test port is no-load on the basis of providing input voltage for the input test port of the to-be-tested airborne converter;

The load adjustment test is used for testing performance parameters of the to-be-tested onboard converter under the conditions that the same input voltage is provided for the input test port of the to-be-tested onboard converter and the output test port has different loads on the basis of providing the input voltage for the input test port of the to-be-tested onboard converter;

4. The method for automatically testing an on-board converter according to claim 3, wherein the step of conducting the pin conductivity test on the on-board converter to be tested by using the test platform comprises the steps of:

the industrial personal computer generates a first test instruction according to a first type of test subtask and transmits the first test instruction to the multi-agent control unit and the digital multimeter;

When each conduction test link is configured and formed, the multi-agent control unit controls the conduction of a power switching device on a transmission path from the positive electrode of the digital multimeter to one of the port pins, controls the conduction of a power switching device on a transmission path from the negative electrode of the digital multimeter to one of the port pins, and controls the disconnection of all other power switching devices, so that one conduction test link is configured and formed between the positive electrode and the negative electrode of the digital multimeter; the two port pins through which each conductive test link passes are two different port pins in the input test port, or two different port pins in the output test port, or one port pin in the input test port and one port pin in the output test port.

5. The method of claim 3, wherein said performing an empty test on said on-board converter to be tested using said test platform comprises:

the industrial personal computer generates a second test instruction according to a second type of test subtask and transmits the second test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

The multi-agent control unit controls the power switching device on the transmission path from the AC/DC programmable power supply to the input test port to be conducted, controls the power analyzer to be conducted with the power switching device on the transmission path from the input test port, controls the power analyzer to be conducted with the power switching device on the transmission path from the output test port and controls other power devices to be disconnected by utilizing a multi-agent technology according to the received second test instruction;

the AC/DC programmable power supply sequentially adjusts input voltages provided for the input test ports according to the received second test instructions, and under each input voltage, the power analyzer respectively acquires and feeds back the performance parameters of the current voltage signals of the input test ports and the performance parameters of the current voltage signals of the output test ports to the industrial personal computer according to the received second test instructions; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

6. The method for automatically testing an on-board converter according to claim 3, wherein the performing load adjustment testing on the on-board converter to be tested by using the testing platform comprises:

the industrial personal computer generates a third test instruction according to a third type of test subtask and transmits the third test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

the multi-agent control unit controls the conduction of a power switching device on a transmission path from the AC/DC programmable power supply to the input test port, controls the conduction of a power switching device on a transmission path from the AC/DC programmable load to the output test port, controls the conduction of a power analyzer and the power switching device on the transmission path from the input test port, controls the conduction of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing a multi-agent technology according to the received third test command;

the AC/DC program-controlled power supply sequentially adjusts the input voltage provided for the input test port according to the received third test command, and under the condition that the input voltage is kept unchanged, the AC/DC program-controlled load sequentially adjusts the load value according to the received third test command so as to change the load condition of the output test port, and under each load value, the power analyzer respectively acquires the performance parameter of the current voltage signal of the input test port and the performance parameter of the current voltage signal of the output test port according to the received third test command and feeds back to the industrial personal computer; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

7. The method for automatically testing an on-board converter according to claim 3, wherein the step of performing a voltage adjustment test on the on-board converter to be tested using the test platform includes:

the industrial personal computer generates a fourth test instruction according to a fourth type of test subtask and transmits the fourth test instruction to the multi-agent control unit, the AC/DC programmable power supply and the power analyzer;

the multi-agent control unit controls the conduction of a power switching device on a transmission path from the AC/DC programmable power supply to the input test port, controls the conduction of a power switching device on a transmission path from the AC/DC programmable load to the output test port, controls the conduction of a power analyzer and the power switching device on the transmission path from the input test port, controls the conduction of the power analyzer and the power switching device on the transmission path from the output test port and controls the disconnection of other power devices by utilizing a multi-agent technology according to the received fourth test command;

the AC/DC program-controlled load is adjusted to the rated load of the on-board converter to be tested according to the received fourth test instruction, under the condition of keeping the rated load, the AC/DC program-controlled power supply sequentially adjusts the input voltage provided for the input test port according to the received fourth test instruction, and under each input voltage, the power analyzer respectively acquires the performance parameters of the current voltage signal of the input test port and the performance parameters of the current voltage signal of the output test port according to the received fourth test instruction and feeds back to the industrial personal computer; the performance parameters of the current voltage signal belonging to the alternating current signal comprise waveforms, phase sequences, three-phase average values, three-phase unbalance and total harmonic content of the signal, and the performance parameters of the current voltage signal belonging to the direct current signal comprise voltage values and voltage ripples.

8. The on-board inverter automatic test method according to claim 1, further comprising:

9. The method of claim 8, wherein said performing functional verification on said test platform comprises: verifying whether the conduction resistance value of the internal circuit of the multi-agent control unit meets corresponding requirements, verifying whether the resistance value of the power switching device in the power switching unit meets corresponding requirements, verifying whether the test platform can identify sample airborne converters of different models, verifying whether current regulation errors realized by the AC/DC program-controlled load meet corresponding requirements, and verifying whether the electrical performance automatic test accuracy of the test platform on the sample airborne converters meets corresponding requirements.

10. The method for automatically testing an on-board converter according to claim 1, wherein the test platform further comprises a man-machine interaction module, and the man-machine interaction module is in communication connection with the industrial personal computer;

The industrial personal computer responds to the configuration information acquired by the man-machine interaction module, and configures the test platform according to the configuration information; the industrial personal computer also displays the test data of the to-be-tested airborne converter in real time through the man-machine interaction module, wherein the test data comprises configured test parameters, and the corresponding collected performance parameters and test attribute information.