Engine control system electromagnetic test method and system based on open-loop mode

Abstract

The invention relates to the field of engine control systems, in particular to an engine control system electromagnetic test method and system based on an open-loop mode. The method comprises the following steps of: calibrating a test environment according to an electromagnetic test subject of the engine control system; setting related state parameters of operation modes of the control system, adjusting the rotating speed of a driving device to enable an alternating-current generator to work at a specified rotating speed, and setting excitation equipment to enable a rotating speed sensor to output a specified signal; monitoring and recording transmission data of the controller; applying test grade electromagnetic excitation to the control system; key signal changes in the test process are monitored, and tests of all test measuring points are completed in sequence; and stopping applying the electromagnetic excitation signal, and repeating the steps according to the operation mode of the control system until the electromagnetic test of the control system is completed. According to the invention, the test safety is improved, the test complexity and difficulty are reduced, and the electromagnetic compatibility conformity design and test verification efficiency of the engine control system is improved.

Description

Technical Field

[0001] The present invention relates to the field of engine control systems, and more specifically, to an electromagnetic test method and system for an engine control system based on an open-loop mode. Background Art

[0002] To ensure that the functions of the engine control system are not affected by electromagnetic interference in harsh electromagnetic environments, such as lightning, HIRF (high-intensity radiated field), EMI (electromagnetic interference), etc., electromagnetic tests are required during the design verification and airworthiness certification stages to prove that the engine control system can operate reliably and normally in the electromagnetic environment, thereby ensuring the safety of aircraft flight.

[0003] At present, electromagnetic test methods for engine control systems mostly use closed-loop modes with fuel. In the closed-loop mode test method, a pressurized fuel system is used to drive a mechanical hydraulic device to achieve a small closed loop to adjust the fuel supply, while a simplified engine simulation model is used to achieve a large closed loop to control the engine speed and thrust generated. During the closed-loop mode test, the functional performance of the control system under test needs to be monitored in real time.

[0004] In order to meet the adequacy of aircraft engine control system design verification and airworthiness compliance assessment, the electromagnetic test method based on the closed-loop mode needs to test the engine control system under different operating conditions, resulting in a long test cycle;

[0005] The electromagnetic test method based on the closed-loop mode requires the use of fuel to realize the small and large closed loops of the control system, which leads to complex test settings, many test equipment, high difficulty, high cost, long cycle and high test safety risks;

[0006] In addition, if the control system application software is changed, the electromagnetic test method based on the closed-loop mode needs to be re-performed, thereby extending the engine control system development cycle;

[0007] The electromagnetic test method based on the closed-loop mode requires the simultaneous application of electromagnetic excitation to all measuring points, which increases the dependence on the number of electromagnetic excitation devices, resulting in high test costs and great difficulty in implementation. Summary of the invention

[0008] The purpose of the present invention is to provide an electromagnetic test method for an engine control system based on an open-loop mode, so as to solve the problems that the electromagnetic test of the engine control system in the prior art requires hydraulic fuel, has poor test safety, is complex to set up, is difficult, costly and has a long cycle.

[0009] In order to achieve the above object, the present invention provides an electromagnetic test method for an engine control system based on an open-loop mode, comprising the following steps:

[0010] Step S1, according to the electromagnetic test subject of the engine control system, select the corresponding electromagnetic excitation source and electromagnetic excitation calibration measurement equipment, and perform test environment calibration at the corresponding test measurement point;

[0011] Step S2, setting state parameters related to the operating mode of the control system, adjusting the speed of the driving device so that the AC generator operates at a specified speed, and setting the excitation device so that the speed sensor outputs a specified signal so that the engine control system operates in the test specified operating mode;

[0012] Step S3, monitoring and recording the transmission data of the controller;

[0013] Step S4, applying a test-level electromagnetic excitation to the control system;

[0014] Step S5, monitor the changes of key signals during the test, and complete the tests of all test points in sequence according to the test requirements;

[0015] Step S6, stop applying the electromagnetic excitation signal, and repeat steps S1 to S5 according to the control system operation mode until the electromagnetic test of the control system is completed.

[0016] In one embodiment, the engine control system electromagnetic test subjects include:

[0017] Voltage spike test, power line audio frequency conducted susceptibility test, induced signal sensitivity - induced magnetic field on interconnecting cables, induced signal sensitivity - induced electric field on interconnecting cables, induced signal sensitivity - induced spike on interconnecting cables, RF conducted susceptibility test, lightning induced transient susceptibility test, induced signal sensitivity - induced magnetic field on equipment, electrostatic discharge test and RF radiation susceptibility test.

[0018] In one embodiment, when the electromagnetic test subjects of the engine control system are voltage spike test, power line audio frequency conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cables, induced signal sensitivity - induced electric field of interconnecting cables, induced signal sensitivity - induced spike of interconnecting cables, radio frequency conduction sensitivity test, and lightning induced transient sensitivity test, the test measuring point is located at the designated cable of the control system;

[0019] The electromagnetic test subject of the engine control system is the sensitivity of the induction signal - when testing the induced magnetic field and electrostatic discharge of the equipment, the test measurement point is located at the designated electronic equipment of the control system;

[0020] When the electromagnetic test subject of the engine control system is a radio frequency radiation sensitivity test, the test measurement point is the entire control system.

[0021] In one embodiment, the state parameters related to the operation mode of the control system include the control current output, switch input and main control channel of the corresponding electro-hydraulic servo valve.

[0022] In one embodiment, the transmission data of the controller includes system input and output parameters and internal performance status parameters.

[0023] In one embodiment, the setting of the operating mode related state parameters further includes setting the input and output signals to represent the typical operating condition of the engine.

[0024] In one embodiment, the step S6 further includes:

[0025] Through closed-loop simulation analysis of the engine model, it is determined whether the control system has passed the electromagnetic compatibility test.

[0026] In one embodiment, the electromagnetic excitation source includes a transmitting antenna and a conducted interference signal device;

[0027] The electromagnetic excitation calibration measurement device includes a receiving antenna and a conducted interference signal measurement device.

[0028] In order to achieve the above object, the present invention provides an electromagnetic test system for an engine control system based on an open-loop mode, which is used to execute the above method, including an engine control system, an excitation device, a system monitoring host computer, a test equipment human-computer interaction interface, an electromagnetic excitation source, and an electromagnetic excitation calibration measurement device:

[0029] The engine control system includes a controller, a sensor group, a cable, and a generator;

[0030] The sensor group includes a rotation speed sensor, and the rotation speed sensor is made to output a specified signal by setting an excitation device;

[0031] The controller receives and processes the collected signals fed back by the sensor group, and sends the processed sensor signals and performance parameter data to the system monitoring host computer;

[0032] The system monitors the host computer, records and saves the received electromagnetic test data, and monitors the key signals of the electromagnetic test in real time;

[0033] The human-machine interface of the test equipment is used to calibrate and control the electromagnetic excitation source and monitor the real-time electromagnetic environment conditions fed back by the electromagnetic excitation calibration measurement equipment;

[0034] The electromagnetic excitation source is used to generate an electromagnetic excitation signal;

[0035] The electromagnetic excitation calibration measurement equipment is used to measure the electromagnetic excitation signal generated by the electromagnetic excitation source to ensure that the applied electromagnetic excitation reaches the test level.

[0036] In one embodiment, the engine control system electromagnetic test system based on the open-loop mode further includes an aircraft power supply and an aircraft load simulation device;

[0037] The engine control system electromagnetic test system also includes a drive device and a drive shaft;

[0038] The generator is driven by the driving device through the driving shaft to supply power to the controller;

[0039] The aircraft power supply provides electrical energy to the controller;

[0040] The aircraft load simulation device provides an aircraft load simulation signal to the controller.

[0041] The electromagnetic test method and system for an engine control system based on an open-loop mode provided by the present invention obtain the electromagnetic response output of the engine control system by applying electromagnetic interference input, and have no mechanical hydraulic actuator fuel closed-loop control steps, thereby improving the test safety, reducing the complexity of the test, and improving the electromagnetic compatibility compliance design and test verification efficiency of the engine control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0043] Figure 1 A principle block diagram of an electromagnetic test system for an engine control system based on an open-loop mode according to an embodiment of the present invention is disclosed;

[0044] Figure 2 An operation step diagram of an electromagnetic test system for an engine control system based on an open-loop mode according to an embodiment of the present invention is disclosed;

[0045] Figure 3 A flow chart of an electromagnetic test method for an engine control system based on an open-loop mode according to an embodiment of the present invention is disclosed.

[0046] The meanings of the reference numerals in the figures are as follows:

[0047] 100 shielded room;

[0048] 110 controller;

[0049] 120 pressure sensor;

[0050] 130 temperature sensor;

[0051] 140 speed sensor;

[0052] 150 other sensors;

[0053] 160 cables;

[0054] 170 AC generator;

[0055] 180 drive device;

[0056] 181 drive shaft;

[0057] 190 system other accessories;

[0058] 200 Monitoring Room;

[0059] 210 shielded cable;

[0060] 220 system monitors the host computer;

[0061] 230 test equipment human-computer interaction interface;

[0062] 240 radio frequency radiation signal transmitting antenna;

[0063] 250 Conducted interference signal equipment;

[0064] 260 RF radiation signal receiving antenna;

[0065] 270 Conducted interference signal measurement equipment;

[0066] 280 aircraft power supplies;

[0067] 290 aircraft load simulation equipment;

[0068] 300 incentive devices. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0070] Figure 1 The principle block diagram of the electromagnetic test system of the engine control system based on the open-loop mode according to an embodiment of the present invention is disclosed. Figure 1 As shown, the electromagnetic test system of the engine control system based on the open-loop mode proposed by the present invention includes an engine control system, an excitation device 300, a system monitoring host computer 220, a test equipment human-computer interaction interface 230, an electromagnetic excitation source, and an electromagnetic excitation calibration measurement device.

[0071] The tested engine control system arranged in the shielding room 100 mainly includes a controller 110, a pressure sensor 120, a temperature sensor 130, a speed sensor 140 and other sensors 150, a cable 160, an alternator 170 and other system accessories 190;

[0072] The AC generator 170 is driven by the driving device 180 through the driving shaft 181 , and the AC generator 170 supplies power to the controller 110 through the cable 160 when it is running.

[0073] By adjusting and setting the excitation device 300 , the rotation speed sensor 140 outputs a specified signal.

[0074] The pressure sensor 120, the temperature sensor 130, the rotation speed sensor 140 and other sensors feed back relevant electrical signals to the controller 110 through the cable 160. The controller 110 receives the collected signals fed back by the sensor group and processes them through the internal open-loop test software;

[0075] The controller 110 transmits the sensor signals and various performance parameters to the system monitoring host computer 220 arranged in the monitoring room 200 through the shielded cable 210;

[0076] The system monitors the host computer 220, records and stores the received electromagnetic test data through the host computer software, and monitors the important signals or key signals concerned in the electromagnetic test in real time.

[0077] The important signals or key signals that need attention are generally determined by the electromagnetic test subjects of the engine control system.

[0078] The host computer software arranged on the system monitoring host computer 220 used in the electromagnetic test has the function of monitoring and recording the data transmitted by the controller 110 .

[0079] The input and output states of the engine control system are maintained in a stable state. Different control system operating modes are defined to represent the operating state of the control system under different working conditions. A specified electromagnetic excitation signal is applied to the system as an interference signal. The upper computer software monitors and records the fluctuations and changes of the input and output signals of the control system during the electromagnetic test.

[0080] The electromagnetic excitation source is used to generate an electromagnetic excitation signal;

[0081] In this embodiment, the electromagnetic excitation source includes a radio frequency radiation signal transmitting antenna 240 and a conducted interference signal device 250;

[0082] The electromagnetic excitation calibration measurement equipment is used to measure the electromagnetic excitation signal generated by the electromagnetic excitation source to ensure that the applied electromagnetic excitation reaches the test level;

[0083] In this embodiment, the electromagnetic excitation calibration measurement device includes a radio frequency radiation signal receiving antenna 260 and a conducted interference signal measurement device 270 .

[0084] The experimenter calibrates and controls the RF radiation signal transmitting antenna 240 or the conducted interference signal device 250 arranged in the shielding room 100 through the test equipment human-machine interaction interface 230 arranged in the monitoring room 200, and monitors the real-time electromagnetic environment conditions fed back by the RF radiation signal receiving antenna 260 or the conducted interference signal measuring device 270 in the shielding room 200.

[0085] Furthermore, the aircraft power supply 280 and the aircraft load simulation device 290 arranged in the monitoring room 200 respectively provide power and transmit aircraft load simulation electrical signals to the controller 110 through the cable 160 .

[0086] like Figure 1 As shown, the electromagnetic test system of the engine control system based on the open-loop mode proposed by the present invention connects all the devices in the system based on the principle of electromagnetic induction, sets it to the selected operating mode, and utilizes coils, injection probes, antennas and other equipment to couple the test levels specified in different test subjects into the system through cable induction or radiation, monitors the system working status, and determines whether the system performance meets the requirements.

[0087] like Figure 1 As shown, the electromagnetic test system of the engine control system based on the open-loop mode proposed by the present invention does not need to use hydraulic fuel and does not need to control the actuator, thus avoiding the potential risks brought by the use of hydraulic fuel in the electromagnetic test in the electromagnetic test method based on the closed-loop mode in the prior art, thereby improving the test safety, reducing the complexity and difficulty of the test, and reducing the test cost.

[0088] The open-loop test software based on the open-loop mode adopted by the controller can be modified based on the original engine control system product software (that is, the product software that controls the fuel supply when the control system is installed on the engine and is running), retaining the main software architecture, real-time scheduling, input / output processing and scheduling, bottom-level fault detection, communication processing (baud rate, data volume, fault-tolerant control, etc.). The improved filter has the same or lower filtering efficiency than the filter of the original engine control system product software, ensuring that all required data can be sent to the host computer.

[0089] The electromagnetic test system of the engine control system based on the open-loop mode proposed in the present invention does not need to use hydraulic fuel and does not need to control the actuator. The controller adopts open-loop test software based on the open-loop mode, cancels the closed-loop control logic in the engine control system product software, thereby canceling the control of the mechanical hydraulic actuator over the fuel required for the closed-loop mode test, ensuring that the system output can be controlled in a stable state according to the communication instructions of the upper computer. At the same time, the design update of the open-loop test software of the engine control system based on the open-loop mode will not lead to the need to re-perform the control system level electromagnetic test, thereby improving the electromagnetic compatibility compliance design and test verification efficiency of the engine control system.

[0090] Figure 2 The operating steps of the electromagnetic test system of the engine control system based on the open-loop mode according to an embodiment of the present invention are disclosed, such as Figure 2 As shown, the present invention proposes an electromagnetic test system for an engine control system based on an open-loop mode. The tester calibrates and controls the electromagnetic excitation source arranged in the shielded room through the human-computer interaction interface of the test equipment, and exposes the control system to lightning, HIRF, and EMI environments with specified levels. The system monitors the input and output signal data and component status performance of the upper computer monitoring control system, and obtains the electromagnetic response generated in different operating modes of the control system. Finally, it is verified through post-test analysis whether the control system meets the design technical requirements.

[0091] Figure 3 A flow chart of an electromagnetic test method for an engine control system based on an open-loop mode according to an embodiment of the present invention is disclosed. Figure 3 As shown, the electromagnetic test method of an engine control system based on an open-loop mode proposed by the present invention comprises the following steps:

[0092] Step S1, according to the electromagnetic test subject of the engine control system, select the corresponding electromagnetic excitation source and electromagnetic excitation calibration measurement equipment, and perform test environment calibration at the corresponding test measurement point;

[0093] Step S2, setting state parameters related to the operating mode of the control system, adjusting the speed of the driving device so that the AC generator operates at a specified speed, and setting the excitation device so that the speed sensor outputs a specified signal so that the engine control system operates in the test specified operating mode;

[0094] Step S3, monitoring and recording the transmission data of the controller;

[0095] Step S4, applying a test-level electromagnetic excitation to the control system;

[0096] Step S5, monitor the changes of key signals during the test, and complete the tests of all test points in sequence according to the test requirements;

[0097] Step S6, stop applying the electromagnetic excitation signal, and repeat steps S1 to S5 according to the control system operation mode until the electromagnetic test of the control system is completed.

[0098] Compared with the electromagnetic test method based on closed-loop mode in the prior art, the present invention proposes an electromagnetic test method for an engine control system based on open-loop mode, which obtains the electromagnetic response output of the engine control system by applying electromagnetic interference input, and has no mechanical hydraulic actuator fuel closed-loop control step.

[0099] In some embodiments, engine control system electromagnetic test subjects include but are not limited to the following:

[0100] Voltage spike test, power line audio frequency conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cables, induced signal sensitivity - induced electric field of interconnecting cables, induced signal sensitivity - induced spike of interconnecting cables, radio frequency conduction sensitivity test, lightning induced transient sensitivity test, induced signal sensitivity - induced magnetic field of equipment, electrostatic discharge test, radio frequency radiation sensitivity test.

[0101] For different test subjects, the corresponding test measurement points also have corresponding locations.

[0102] In some embodiments, when the electromagnetic test subjects of the engine control system are voltage spike test, power line audio frequency conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cables, induced signal sensitivity - induced electric field of interconnecting cables, induced signal sensitivity - induced spike of interconnecting cables, radio frequency conduction sensitivity test, and lightning induced transient sensitivity test, the test measuring point is located at the designated cable of the control system;

[0103] The electromagnetic test subject of the engine control system is the sensitivity of the induction signal - when testing the induced magnetic field and electrostatic discharge of the equipment, the test measurement point is located at the designated electronic equipment of the control system;

[0104] When the electromagnetic test subject of the engine control system is a radio frequency radiation sensitivity test, the test measurement point is the entire control system.

[0105] The following is an example of the RF radiation sensitivity test. Figure 1 The electromagnetic test system of the present invention is used to illustrate the electromagnetic test method of the engine control system based on the open-loop mode, which specifically includes the following steps:

[0106] Step S1, according to the electromagnetic test subject of the engine control system, the tester calibrates the RF radiation signal transmitting antenna 240 and feeds back the signal through the RF radiation signal receiving antenna 260, performs test environment calibration at the corresponding test measurement point, and confirms that the electromagnetic environment in the shielding room 100 reaches the test level.

[0107] After the test level reaches the standard, turn off the electromagnetic excitation source to ensure that there is no electromagnetic interference signal in the shielding room.

[0108] In other embodiments, for other electromagnetic test subjects, the electromagnetic excitation source and electromagnetic excitation calibration measurement equipment required by the test subject are used to perform test environment calibration at corresponding test measurement points to ensure that a specified level of interference level is injected into the system.

[0109] Step S2, the controller 110 sets the state parameters related to the control system operation mode in the internal open-loop software, adjusts the speed of the driving device 180 so that the AC generator operates at a specified speed, and sets the excitation device 300 so that the speed sensor 140 outputs a specified signal, so that the engine control system operates in the test specified operation mode;

[0110] The system operation mode should set each input and output signal to a state that can represent the typical operating conditions of the engine.

[0111] In this embodiment, the state parameters related to the control system operation mode include but are not limited to the corresponding electro-hydraulic servo valve control current output, switch input and main control channel.

[0112] Test subjects related to aircraft power supply (for example, voltage spike test, power line audio frequency conduction sensitivity test) are carried out in two power supply modes: aircraft power supply and AC generator power supply. For other sensitivity test items, in order to reduce the test time, the same type of output interfaces can be set to different states.

[0113] It should be noted that the engine control system operating modes include but are not limited to various ground and air operating modes such as air cruising.

[0114] By simulating various operating modes of the engine control system in an indoor ground environment, the response of the engine control system to various electromagnetic excitations such as radiation, conduction, and indirect lightning effects can be tested, saving test costs and development costs of engine control system products.

[0115] Step S3, start the open-loop software data monitoring and recording function in the system monitoring host computer 220, monitor and record the data transmitted by the internal open-loop software of the controller 110 through the shielded cable 210;

[0116] In this embodiment, the transmission data of the controller includes but is not limited to system input and output parameters and internal performance status parameters.

[0117] The system monitors the host computer 220, and the recorded data is analyzed after the test to determine the influence of electromagnetic interference on the thrust of the engine.

[0118] Step S4: The tester applies a test-level electromagnetic excitation to the electromagnetic test system;

[0119] Step S5, monitor the changes of key signals during the test, complete the test of the current test point according to the test requirements, and the system monitors the host computer 220 to save the received data.

[0120] The test point in this embodiment is the entire control system, and the test is completed when the current test point is completed.

[0121] If the current test subject has multiple test measurement points, for example, the test subjects are voltage spike test, power line audio frequency conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cables, induced signal sensitivity - induced electric field of interconnecting cables, induced signal sensitivity - induced spike of interconnecting cables, radio frequency conduction sensitivity test, lightning induced transient sensitivity test, induced signal sensitivity - induced magnetic field of equipment, and electrostatic discharge test, then perform the above four steps for each test measurement point in turn according to the test requirements.

[0122] Step S6, stop applying the electromagnetic excitation signal, and repeat the above steps S1 to S5 as needed according to the control system operation mode assessment requirements until the electromagnetic test of the control system is completed.

[0123] Furthermore, the step S6 further includes:

[0124] Through closed-loop simulation analysis of the engine model, it is determined whether the control system has passed the electromagnetic compatibility test.

[0125] After the electromagnetic test, rather than during the test, the closed-loop simulation analysis of the engine model is performed and the analysis system monitors the data recorded and saved by the host computer to determine the impact of signal fluctuations on the control system function and determine whether the control system has passed the electromagnetic compatibility test.

[0126] In some embodiments, the closed-loop simulation analysis of the engine model adopts an engine simulation model used in a large closed loop in an electromagnetic test method based on a closed-loop mode.

[0127] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.

[0128] Compared with the prior art, the electromagnetic test system and method of the engine control system based on the open-loop mode proposed in the present invention performs electromagnetic compatibility compliance verification of the control system, and specifically has the following beneficial effects:

[0129] 1) During the electromagnetic test based on the open-loop mode, there is no need to use hydraulic fuel or control the actuator, which improves the test safety, reduces the test cost, and reduces the test complexity;

[0130] 2) The controller adopts open-loop test software based on open-loop mode, cancels the closed-loop control logic in the engine control system product software, and does not need to re-perform system-level electromagnetic testing when the design of the engine control system open-loop test software is updated or the engine dynamic characteristics change, thereby improving the efficiency of electromagnetic compatibility compliance design and test verification of the control system and saving test costs and engine product development costs;

[0131] 3) There is no need to inject electromagnetic excitation signals into multiple test points at the same time, allowing each test point interface to perform electromagnetic tests separately, reducing the dependence on the number of electromagnetic excitation generating devices, reducing test costs, and avoiding the problem of being unable to inject multiple harnesses simultaneously when the injection probe is too large;

[0132] 4) The control system operation mode is set to represent various typical operating conditions of the engine through the controller and its open-loop test software, aircraft load simulation equipment, AC generator, etc., to achieve a comprehensive assessment of the electromagnetic compatibility of the engine control system during the entire operation process.

[0133] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0134] Those skilled in the art will appreciate that information, signals, and data may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips cited throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0135] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. The technician may implement the described functionality in different ways for each specific application, but such implementation decisions should not be interpreted as resulting in a departure from the scope of the present invention.

[0136] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration.

[0137] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components.

[0138] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of a computer program from one place to another. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0139] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. An electromagnetic test method for an engine control system based on an open-loop mode, characterized in that: The following steps are involved: Step S1, according to the electromagnetic test subject of the engine control system, select the corresponding electromagnetic excitation source and electromagnetic excitation calibration measurement equipment, and perform test environment calibration at the corresponding test measurement point; Step S2, setting state parameters related to the operating mode of the control system, adjusting the speed of the driving device so that the AC generator operates at a specified speed, and setting the excitation device so that the speed sensor outputs a specified signal so that the engine control system operates in the test specified operating mode; Step S3, monitoring and recording the transmission data of the controller; Step S4, applying test-level electromagnetic excitation to the control system; Step S5, monitor the changes of key signals during the test, and complete the tests of all test points in sequence according to the test requirements; Step S6, stop applying the electromagnetic excitation signal, and repeat steps S1 to S5 according to the control system operation mode until the electromagnetic test of the control system is completed.

2. The electromagnetic test method of the engine control system based on the open-loop mode according to claim 1 is characterized in that: The engine control system electromagnetic test subjects include: Voltage spike test, power line audio frequency conducted susceptibility test, induced signal sensitivity - induced magnetic field on interconnecting cables, induced signal sensitivity - induced electric field on interconnecting cables, induced signal sensitivity - induced spike on interconnecting cables, RF conducted susceptibility test, lightning induced transient susceptibility test, induced signal sensitivity - induced magnetic field on equipment, electrostatic discharge test and RF radiation susceptibility test.

3. The electromagnetic test method of the engine control system based on the open-loop mode according to claim 2 is characterized in that: When the electromagnetic test subjects of the engine control system are voltage spike test, power line audio frequency conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cables, induced signal sensitivity - induced electric field of interconnecting cables, induced signal sensitivity - induced spike of interconnecting cables, radio frequency conduction sensitivity test, and lightning induced transient sensitivity test, the test measuring point is located at the designated cable of the control system; The electromagnetic test subject of the engine control system is the sensitivity of the induction signal - the induction magnetic field and electrostatic discharge test of the equipment, and the test measurement point is located at the designated electronic equipment of the control system; When the electromagnetic test subject of the engine control system is a radio frequency radiation sensitivity test, the test measurement point is the entire control system.

4. The electromagnetic test method of the engine control system based on the open-loop mode according to claim 1 is characterized in that: The control system operation mode related state parameters include the corresponding electro-hydraulic servo valve control current output, switch input and main control channel.

5. The electromagnetic test method of engine control system based on open-loop mode according to claim 1, characterized in that: The setting of the state parameters related to the operating mode of the control system further includes setting the input and output signals to represent the typical operating condition of the engine.

6. The electromagnetic test method of engine control system based on open-loop mode according to claim 1, characterized in that: The transmission data of the controller includes system input and output parameters and internal performance status parameters.

7. The electromagnetic test method of engine control system based on open-loop mode according to claim 1, characterized in that: The step S6 further comprises: Through closed-loop simulation analysis of the engine model, it is determined whether the control system has passed the electromagnetic compatibility test.

8. The electromagnetic test method of engine control system based on open-loop mode according to claim 1, characterized in that: The electromagnetic excitation source includes a radio frequency radiation signal transmitting antenna and a conduction interference signal device; The electromagnetic excitation calibration measurement device includes a radio frequency radiation signal receiving antenna and a conducted interference signal measurement device.

9. An electromagnetic test system for an engine control system based on an open-loop mode, used to perform the method as claimed in any one of claims 1 to 8, characterized in that: Including engine control system, excitation equipment, system monitoring host computer, test equipment human-computer interaction interface, electromagnetic excitation source and electromagnetic excitation calibration measurement equipment: The engine control system includes a controller, a sensor group, a cable and a generator; The sensor group includes a rotation speed sensor, and the rotation speed sensor is made to output a specified signal by setting an excitation device; The controller receives and processes the collected signals fed back by the sensor group, and sends the processed sensor signals and performance parameter data to the system monitoring host computer; The system monitors the host computer, records and saves the received electromagnetic test data, and monitors the key signals of the electromagnetic test in real time; The human-machine interface of the test equipment is used to calibrate and control the electromagnetic excitation source and monitor the real-time electromagnetic environment conditions fed back by the electromagnetic excitation calibration measurement equipment; The electromagnetic excitation source is used to generate an electromagnetic excitation signal; The electromagnetic excitation calibration measurement equipment is used to measure the electromagnetic excitation signal generated by the electromagnetic excitation source to ensure that the applied electromagnetic excitation reaches the test level.

10. The electromagnetic test system of the engine control system based on the open-loop mode according to claim 9, characterized in that: It also includes aircraft power supplies and aircraft load simulation equipment; The engine control system electromagnetic test system also includes a drive device and a drive shaft; The generator is driven by the driving device through the driving shaft to supply power to the controller; The aircraft power supply provides electrical energy to the controller; The aircraft load simulation device provides an aircraft load simulation signal to the controller.

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