CN105319463A - Onboard ground test simulation exciter - Google Patents
Onboard ground test simulation exciter Download PDFInfo
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- CN105319463A CN105319463A CN201510680244.3A CN201510680244A CN105319463A CN 105319463 A CN105319463 A CN 105319463A CN 201510680244 A CN201510680244 A CN 201510680244A CN 105319463 A CN105319463 A CN 105319463A
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Abstract
An onboard ground test simulation exciter comprises a main control computer and an onboard ground test simulation exciter test cabinet. The main control computer is connected to the onboard ground test simulation exciter test cabinet through an Ethernet. The onboard ground test simulation exciter test cabinet is internally provided with a switch, an Ethernet cabinet module, a discrete magnitude output control module, an RS422 communication module, a signal connection configuration module, a test interface module and a power supply module, wherein an analog input unit, an analog output unit and a discrete magnitude input unit are inserted in slots of the Ethernet cabinet module; the Ethernet cabinet module, the discrete magnitude output control module and the RS422 communication module are respectively connected to the switch in the cabinet through the Ethernet; the switch routes data to a network interface of the test cabinet and further is connected to the main control computer; and the main control computer is enabled to collect onboard signals and output excitation signals to an RIU.
Description
Technical field
The invention belongs to automatic field, be related specifically to Novel machine upper ground surface test simulation driver.
Background technology
Airborne Electromechanical Systems is the general name performing flight support functional subsystem in aircraft, mainly comprises electric power system, fuel system.Remote interface units (RIU) is under the jurisdiction of electrical and mechanical comprehensive management system (UMS), mainly completes and controls with the state acquisition of its cross-linking machine electronic system and output.In Airborne Electromechanical Systems, the control signal of each subsystem is connected with airborne databus by RIU with sensor signal, realizes the exchanges data of Electromechanical Management computing machine (UMC) and organic electronic system.
Compared with traditional Airborne Electromechanical Systems equipment, the interface features of novel airborne Mechatronic Systems is numerous and diverse, signal type is numerous, range variation range is large, and existing RIU test macro can only be simulated dynamo-electric subsystem to RIU and provided pumping signal, proof machine electric management system is to the signal monitoring function of organic electronic system, can not the suitability of proof machine electric management system and each organic electronic system sensor parts comprehensively, can not Real-Time Monitoring be realized to each organic electronic system signal, its automaticity is low, testing efficiency is low, practicality is not strong.The present invention for data acquisition target, realizes the collection to organic electronic system output signal on machine, display with organic electronic system each on RIU and machine; According to organic electronic system requirements, export corresponding pumping signal to RIU, verify Electric-machinery Management System function, whole-course automation is tested, and considerably reduces test job amount, greatly improves testing efficiency.Be that a stability is high, highly versatile, expansibility be strong, feature richness, simple operation, measuring accuracy is high, reliable test result, cost performance are high Portable test system.
Summary of the invention
In view of prior art Problems existing, the object of the invention is to provide a kind of machine upper ground surface test simulation driver, it is based on technology of instrument and meter, computer technology and automatization testing technique, adopt Ethernet distributed frame, realize the Real-Time Monitoring to organic electronic subsystem state on machine, and according to organic electronic system requirements, export corresponding pumping signal, realize the checking to Electric-machinery Management System function.
To achieve these goals, the technical solution adopted in the present invention is: machine upper ground surface test simulation driver, comprise main control computer, machine upper ground surface test simulation driver test cabinet, described main control computer is connected on machine upper ground surface test simulation driver test cabinet by Ethernet
Described main control computer comprises: simulation excitation device application software, operating system and driver element, main control computer is a kind of application industrial computer in industrial settings, testing software runs on wherein, being the task scheduling center of test macro, control center, is also the core of whole test macro, and it adopts high speed multi-core CPU as processor, large internal memory and high-capacity and high-speed solid state hard disc, realize sending control command, receive image data, process data, storage data.
Described machine upper ground surface test simulation driver test machine case comprises: switch, and Ethernet cabinet module, discrete magnitude output control module, RS422 communication module, signal connect configuration module, test interface module, supply module; Ethernet cabinet module, discrete magnitude output control module, RS422 communication module are all connected to by Ethernet on the switch of machine upper ground surface test simulation driver test cabinet inside, switch routes data to the network interface of machine upper ground surface test simulation driver test cabinet, and then is connected with main control computer.
Above-mentioned a kind of Novel machine upper ground surface test simulation driver, described Ethernet cabinet module comprises analog acquisition unit, discrete magnitude collecting unit, analog output unit; Wherein simulation analog quantity collecting unit, discrete magnitude collecting unit, analog output unit are installed in the slot of Ethernet cabinet, and this Ethernet cabinet adopts 8 groove NICdaq-9188 cabinets;
Described analog acquisition unit refers to: have the high speed of analog input, high precision DAQ board and modulate circuit, gathers the voltage of measurand, electric current and frequency signal; Its analog input DAQ board adopts NI-9205 capture card, and its analog acquisition passage is 32 road single-ended analog inputs, and channel acquisition speed can reach 250kS/s, and voltage acquisition scope is ± 200mV to 10V;
Described discrete magnitude collecting unit refers to: have the high speed of digital quantity input, high precision DAQ board and modulate circuit, gather the digital signal of measurand; Its digital quantity input OAQ board adopts NI-9425 capture card, and its digital data acquisition passage reaches 32 tunnels, compatible 12V and 24V level;
Described analog output unit refers to: high speed, the high precision DAQ board with analog quantity electric current and voltage output, to measurand output voltage, electric current and frequency excitation signal; Analog voltage exports DAQ board and adopts NI-9264 board, and its analog voltage output channel is 16 tunnels, and every channel sample rate can reach 25ks/s; Electric current exports DAQ board and adopts NI-9265 board, and its analog current output channel is 4 tunnels, and channel sample rate can reach 100kS/s.
Above-mentioned machine upper ground surface test simulation driver, the output terminal of described discrete magnitude output control module is connected configuration module input end with signal be connected; Discrete magnitude output control module is a kind of micro controller system that can export low and high level digital quantity, and TMS320F28335 selected by its controller, and clock frequency can reach 150M, built-in high speed SPI serial interface, to meet the multichannel demand of native system; This module output digit signals also carries out break-make control to the relay switch that signal connects in configuration module, and the break-make realizing RIU and machine upper end controls and the break-make of RIU and test macro end controls.
Above-mentioned machine upper ground surface test simulation driver, described RS422 communication module refers to: the serial server that multiple RS422 serial ports can be converted to Ethernet, this serial server adopts 4 serial server ZLAN5400, the RS422 serial data that each controller in harvester upper end sends to RIU, be transferred to main control computer by Ethernet, complete the Real-Time Monitoring to machine upper end RS422 data.
Above-mentioned machine upper ground surface test simulation driver, described signal connects configuration module and refers to: the program control commutation circuit of the annexation on machine, between RIU, test macro, it is made up of relay switch, utilizes discrete magnitude output control module pilot relay switch to realize signal and connects configuration module; For test macro collection signal, implementation and testing system on-off function; For pumping signal, realize machine being connected with RIU, disconnecting, machine is connected with test macro, break function.
Above-mentioned machine upper ground surface test simulation driver, described test interface module comprises: electric connector, connection terminal board, is used for connecting measurand and test macro.
Above-mentioned machine upper ground surface test simulation driver, described test supply module forms by providing the integrated power supply module of multiple voltage type, provides test and excitation and power for discrete magnitude input block, discrete magnitude output unit, analog output unit and RS422 communication module for measurand.
A method of testing for described machine upper ground surface test simulation driver, comprises the following steps:
Step one: the initialization of system and self-inspection.
Step 2: test configurations: according to the difference of test assignment and tested RIU, system is by detecting information corresponding for record and load the tested RIU configuration file of specifying.
Step 3: carry out signal testing one by one: resolve the tested RIU description document loaded, after carrying out dispatch and distribute, tests separately each channel signal of each type of tested RIU, observation experiment phenomenon, and log system testing resource.
Step 4: carry out batch signal testing: resolve the tested RIU description document loaded, to system testing resource carry out dispatch with distribute after, the identical and different types of signal of selection multichannel is tested respectively, observation experiment phenomenon, and log.
Step 5: data acquisition process and storage: display multi channel signals waveform, intelligently filters storage of collected data.
Step 6: provide wave shape playback: after test terminates, can carry out post-flight data playback to the old test data being stored to hard disk, for checking analysis; During data readback, operating personnel can observe total data curve and the instantaneous value in current playback moment with different playback speed.
Advantage of the present invention: the RS-422 Content of Communication compared with prior art on Real-Time Monitoring RIU of the present invention and machine between subsystem; With subsystem on RIU and machine for data acquisition target, realize the collection to organic electronic system output signal on machine, display; According to organic electronic system requirements, export corresponding pumping signal to RIU, Electric-machinery Management System function is verified; Whole-course automation is tested, and considerably reduces test job amount, improves testing efficiency; It is that a stability is high, highly versatile, expansibility are strong, feature richness, simple operation, measuring accuracy is high, reliable test result, cost performance are high Portable test system.
Accompanying drawing explanation
Fig. 1 simulation excitation device overall architecture schematic diagram;
Fig. 2 test machine tank module schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in detail, to understand the present invention further, but not as the restriction of claims protection domain of the present invention.
As shown in Figure 1: machine upper ground surface test simulation driver, comprise main control computer and multiple RIU test box, RIU test box can be multiplexing in different remote interface units.
As shown in Figure 2: machine upper ground surface test simulation driver comprises main control computer, machine upper ground surface test simulation driver test cabinet, main control computer is connected on machine upper ground surface test simulation driver test cabinet by Ethernet, at machine upper ground surface test simulation driver test cabinet inside, comprise switch, Ethernet cabinet module, discrete magnitude output control module, RS422 communication module, signal connect configuration module, test interface module, supply module; Wherein in too net cabinet module slot, be inserted with analog input unit, analog output unit, discrete magnitude input block, Ethernet cabinet module, discrete magnitude output control module, RS422 communication module are all connected on the switch of cabinet inside by Ethernet, switch routes data to the network interface of test cabinet, and then is connected to main control computer; The signal that RIU is connected in machine upper ground surface test simulation driver test cabinet by the test interface module of machine upper ground surface test simulation driver test cabinet with the signal cable on machine is connected configuration module, signal connects configuration module and is connected with analog input unit, analog output unit, discrete magnitude input block, discrete magnitude output control module, RS422 communication module, realizes main control computer to the collection of signal on machine and to RIU output drive signal; The power supply that test supply module provides test macro modules to need.
Described main control computer comprises: simulation excitation device application software, operating system and driver element, main control computer is a kind of application industrial computer in industrial settings, testing software runs on wherein, is the task scheduling center of test macro, control center, is also the core of whole test macro, it adopts high speed multi-core CPU as processor, C++ programmes, large internal memory and high-capacity and high-speed solid state hard disc, realizes sending control command, receive image data, process data, storage data.
Described machine upper ground surface test simulation driver test machine case comprises: switch, and Ethernet cabinet module, discrete magnitude output control module, RS422 communication module, signal connect configuration module, test interface module, supply module; Ethernet cabinet module, discrete magnitude output control module, RS422 communication module are all connected to by Ethernet on the switch of machine upper ground surface test simulation driver test cabinet inside, switch routes data to the network interface of machine upper ground surface test simulation driver test cabinet, and then is connected with main control computer; Ethernet cabinet module comprises analog acquisition unit, discrete magnitude collecting unit, analog output unit; Wherein analog acquisition unit, discrete magnitude collecting unit, analog output unit are installed in the slot of Ethernet cabinet, and this Ethernet cabinet adopts 8 groove NIcDAQ-9188 cabinets, and the distributed measurement for system provides firm platform.
Described analog acquisition unit refers to high speed, high precision DAQ board and the modulate circuit with analog input, gathers the voltage of measurand, electric current and frequency signal; Its analog input DAQ board adopts NI-9205 capture card, its analog acquisition passage is 32 road single-ended analog inputs, channel acquisition speed can reach 250kS/s, voltage acquisition scope is ± 200mV to 10V, and the simulating signal that need gather comprises: the frequency signal of the voltage signal of 0-10V, 0-80V, 0-200V, the current signal of 4-20mA, 0-40mA and 1-10k.
Described discrete magnitude collecting unit refers to: have the high speed of digital quantity input, high precision DAQ board and modulate circuit, gather the digital signal of measurand; Its digital quantity input OAQ board adopts NI-9425 capture card, and its digital data acquisition passage reaches 32 tunnels, compatible 12V and 24V level;
Described analog output unit refers to: high speed, the high precision DAQ board with analog quantity electric current and voltage output, to measurand output voltage, electric current and frequency excitation signal; Analog voltage exports DAQ board and adopts NI-9264 board, and its analog voltage output channel is 16 tunnels, and every channel sample rate can reach 25ks/s; Electric current exports DAQ board and adopts NI-9265 board, and its analog current output channel is 4 tunnels, and channel sample rate can reach 100kS/s; The simulating signal of output drive is needed to comprise: the current excitation signal of 4-20mA, the voltage excitation signals of 0-10V and the sinusoidal excitation signal of 200Hz.
The output terminal of described discrete magnitude output control module is connected configuration module input end with signal be connected; Discrete magnitude output control module is a kind of micro controller system that can export low and high level digital quantity, TMS320F28335 selected by its controller, clock frequency can reach 150M, built-in high speed SPI serial interface, by serial/parallel mouth conversion chip, can be realize serial data being converted to parallel port to export easily.Meanwhile, controller also extends out the mixed-media network modules mixed-media of SPI interface, to realize the connection with main control computer, to meet the multichannel demand of native system; This module output digit signals also carries out break-make control to the relay switch that signal connects in configuration module, and the break-make realizing RIU and machine upper end controls and the break-make of RIU and test macro end controls.
Described RS422 communication module refers to: the serial server that multiple RS422 serial ports can be converted to Ethernet, this serial server adopts 4 serial server ZLAN5400, the RS422 serial data that each controller in harvester upper end sends to RIU, be transferred to main control computer by Ethernet, complete the Real-Time Monitoring to machine upper end RS422 data;
Described signal connects configuration module and refers to: the program control commutation circuit of the annexation on machine, between RIU, test macro, and it is made up of relay switch, utilizes discrete magnitude output control module pilot relay switch to realize signal and connects configuration module; When test macro collection signal, need the connection of disconnection machine upper end and RIU, prevent test macro collection signal from bringing interference to RIU; When the serviceability of proof machine electric management system, test macro need be made to replace machine upper end to provide pumping signal to RIU, now need the connecting valve of disconnection machine upper end and RIU, the connecting valve of closed test macro output drive signal and RIU.For RIU to the output signal of machine upper end, when test macro collection signal, the connecting valve of RIU and machine upper end need be disconnected, prevent test macro from bringing interference to machine upper end.
Described test interface module comprises: electric connector, connection terminal board, is used for connecting measurand and test macro; The test interface module of each machine upper ground surface test simulation driver test cabinet is made up of the aviation plug of 4 128 pins, 4 10 pins and terminal board, completes with this each passage of measurand to connect configuration module hard wires to the signal in test macro.
Described test supply module forms by providing the integrated power supply module of multiple voltage type, provides test and excitation and power for discrete magnitude input block, discrete magnitude output unit, analog output unit and RS422 communication module for measurand.
A kind of method of testing of machine upper ground surface test simulation driver: this method of testing is based on the height configurability of hardware system, according to the difference of measurand and test assignment, by running on the testing software in main control computer, can the initialization of completion system and self-inspection.During test, main control computer sends instruction to discrete magnitude output control module by Ethernet, and discrete magnitude output control module is resolved instruction, and the relay switch that signal connects in configuration module carries out break-make control, completes and configures the connection of signalling channel; After expanding channels has configured, computing machine sends instruction to analog input unit, discrete magnitude input block and analog output form unit, start to gather data on each passage and output drive to each passage, the data collected are transferred in the industrial computer memory buffer queue of main control computer via Ethernet cabinet module, carry out data storage and display through data processing and analysis module to the data collected; After test jobs completes, playback display can be carried out by data readback function to existing test data, for further analysis.Steps of the method are:
Step one: the initialization of system and self-inspection; After system starts, first need selected measurand (RIU) and test cabinet, system can read corresponding configuration file according to the selection of user, the configuration information of loading system; User can carry out System self-test subsequently, and after self-inspection completes, generation journal file is checked for user.
Step 2: test configurations; In the present system, according to different test assignments and measurand, system carries out different distribution by hardware resource, so before carrying out test, needs to carry out test configurations; After operating personnel select measurand and test cabinet, system will load given measurand configuration file, buffer memory mission bit stream.
Step 3: carry out signal testing one by one; Resolve the tested RIU description document loaded, after system testing resource is carried out dispatch and distributed, each channel signal of each type of tested RIU is tested separately.
Step 4: carry out batch signal testing; Resolve the tested RIU description document loaded, to system testing resource carry out dispatch with distribute after, selection multichannel is identical and different types ofly carry out signal testing respectively.
Step 5: data acquisition process and storage; In test process, analog input unit carrys out the data in response channel with 10KHz frequency collection, real-time Transmission in main control computer, and is stored to hard disk, and resolving for wave shape playback and frequency provides data source.
Step 6: wave shape playback is provided; After test terminates, can carry out data readback to the original test data being stored to hard disk, for checking analysis, during data readback, operating personnel can observe total data curve and the instantaneous value in current playback moment with different playback speed.
Below by reference to the accompanying drawings the specific embodiment of the present invention is described; but these explanations can not be understood to limit scope of the present invention; protection scope of the present invention is limited by the claims of enclosing, and any change on the claims in the present invention basis is all protection scope of the present invention.
Claims (8)
1. machine upper ground surface test simulation driver, is characterized in that, comprises main control computer, machine upper ground surface test simulation driver test cabinet, and described main control computer is connected on machine upper ground surface test simulation driver test cabinet by Ethernet;
Described main control computer comprises: simulation excitation device application software, operating system and driver element, main control computer is a kind of application industrial computer in industrial settings, testing software runs on wherein, being the task scheduling center of test macro, control center, is also the core of whole test macro, and it adopts high speed multi-core CPU as processor, large internal memory and high-capacity and high-speed solid state hard disc, realize sending control command, receive image data, process data, storage data;
Described machine upper ground surface test simulation driver test machine case comprises: switch, and Ethernet cabinet module, discrete magnitude output control module, RS422 communication module, signal connect configuration module, test interface module, supply module; Ethernet cabinet module, discrete magnitude output control module, RS422 communication module are all connected to by Ethernet on the switch of machine upper ground surface test simulation driver test cabinet inside, switch routes data to the network interface of machine upper ground surface test simulation driver test cabinet, and then is connected with main control computer.
2. machine upper ground surface test simulation driver according to claim 1, it is characterized in that, described Ethernet cabinet module comprises analog acquisition unit, discrete magnitude collecting unit, analog output unit; Wherein simulation analog quantity collecting unit, discrete magnitude collecting unit, analog output unit are installed in the slot of Ethernet cabinet, and this Ethernet cabinet adopts 8 groove NICdaq-9188 cabinets;
Described analog acquisition unit refers to: have the high speed of analog input, high precision DAQ board and modulate circuit, gathers the voltage of measurand, electric current and frequency signal; Its analog input DAQ board adopts NI-9205 capture card, and its analog acquisition passage is 32 road single-ended analog inputs, and channel acquisition speed can reach 250kS/s, and voltage acquisition scope is ± 200mV to 10V;
Described discrete magnitude collecting unit refers to: have the high speed of digital quantity input, high precision DAQ board and modulate circuit, gather the digital signal of measurand; Its digital quantity input OAQ board adopts NI-9425 capture card, and its digital data acquisition passage reaches 32 tunnels, compatible 12V and 24V level;
Described analog output unit refers to: high speed, the high precision DAQ board with analog quantity electric current and voltage output, to measurand output voltage, electric current and frequency excitation signal; Analog voltage exports DAQ board and adopts NI-9264 board, and its analog voltage output channel is 16 tunnels, and every channel sample rate can reach 25ks/s; Electric current exports DAQ board and adopts NI-9265 board, and its analog current output channel is 4 tunnels, and channel sample rate can reach 100kS/s.
3. machine upper ground surface test simulation driver according to claim 1, is characterized in that, the output terminal of described discrete magnitude output control module is connected configuration module input end with signal be connected; Discrete magnitude output control module is a kind of micro controller system that can export low and high level digital quantity, and TMS320F28335 selected by its controller, and clock frequency can reach 150M, built-in high speed SPI serial interface.
4. machine upper ground surface test simulation driver according to claim 1, it is characterized in that, described RS422 communication module refers to: the serial server that multiple RS422 serial ports can be converted to Ethernet, this serial server adopts 4 serial server ZLAN5400, the RS422 serial data that each controller in harvester upper end sends to RIU.
5. machine upper ground surface test simulation driver according to claim 1, it is characterized in that, described signal connects configuration module and refers to: the program control commutation circuit of the annexation on machine, between RIU, test macro, it is made up of relay switch, utilizes discrete magnitude output control module pilot relay switch to realize signal and connects configuration module; For test macro collection signal, implementation and testing system on-off function; For pumping signal, realize machine being connected with RIU, disconnecting, machine is connected with test macro, break function.
6. machine upper ground surface test simulation driver according to claim 1, it is characterized in that, described test interface module comprises: electric connector, connection terminal board.
7. machine upper ground surface test simulation driver according to claim 1, is characterized in that, described test supply module forms by providing the integrated power supply module of multiple voltage type.
8. a method of testing for machine upper ground surface test simulation driver as claimed in claim 1, is characterized in that, comprise the following steps:
Step one: the initialization of system and self-inspection;
Step 2: test configurations: according to the difference of test assignment and tested RIU, system is by detecting information corresponding for record and load the tested RIU configuration file of specifying;
Step 3: carry out signal testing one by one: resolve the tested RIU description document loaded, after carrying out dispatch and distribute, tests separately each channel signal of each type of tested RIU, observation experiment phenomenon, and log system testing resource;
Step 4: carry out batch signal testing: resolve the tested RIU description document loaded, to system testing resource carry out dispatch with distribute after, the identical and different types of signal of selection multichannel is tested respectively, observation experiment phenomenon, and log;
Step 5: data acquisition process and storage: display multi channel signals waveform, intelligently filters storage of collected data;
Step 6: provide wave shape playback: test afterwards, can carry out post-flight data playback to the old test data being stored to hard disk, for checking analysis.
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| CN106527401A (en) * | 2016-11-30 | 2017-03-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Flight control test automated testing system |
| CN108089952A (en) * | 2016-11-22 | 2018-05-29 | 北京计算机技术及应用研究所 | A kind of automated test device |
| CN110816886A (en) * | 2019-11-12 | 2020-02-21 | 西安子国微科技有限公司 | Wheel cooling device testing system based on LabVIEW and testing method thereof |
| CN112114532A (en) * | 2020-08-14 | 2020-12-22 | 航天科工空间工程发展有限公司 | Pressure simulation device and inflation strategy verification equipment |
| CN112462174A (en) * | 2020-11-12 | 2021-03-09 | 中国航空工业集团公司上海航空测控技术研究所 | Component level test system for hoisting display unit |
| CN113218469A (en) * | 2021-04-30 | 2021-08-06 | 西安沃祥航空科技有限公司 | System and method for aircraft fuel measurement control semi-physical simulation |
| CN116734929A (en) * | 2023-08-16 | 2023-09-12 | 中北大学 | Distributed multi-parameter test system suitable for aircraft |
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| CN106527401B (en) * | 2016-11-30 | 2023-09-05 | 中国航空工业集团公司沈阳飞机设计研究所 | Automatic test system for flight control test |
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| CN110816886B (en) * | 2019-11-12 | 2023-05-30 | 西安子国微科技有限公司 | LabVIEW-based machine wheel cooling device testing system and testing method thereof |
| CN112114532A (en) * | 2020-08-14 | 2020-12-22 | 航天科工空间工程发展有限公司 | Pressure simulation device and inflation strategy verification equipment |
| CN112462174A (en) * | 2020-11-12 | 2021-03-09 | 中国航空工业集团公司上海航空测控技术研究所 | Component level test system for hoisting display unit |
| CN113218469A (en) * | 2021-04-30 | 2021-08-06 | 西安沃祥航空科技有限公司 | System and method for aircraft fuel measurement control semi-physical simulation |
| CN113218469B (en) * | 2021-04-30 | 2024-02-13 | 西安沃祥航空科技有限公司 | System and method for semi-physical simulation of airplane fuel measurement control |
| CN116734929A (en) * | 2023-08-16 | 2023-09-12 | 中北大学 | Distributed multi-parameter test system suitable for aircraft |
| CN116734929B (en) * | 2023-08-16 | 2023-11-07 | 中北大学 | Distributed multi-parameter test system suitable for aircraft |
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