An electromagnetic testing method and system for an engine control system based on open-loop mode

Abstract

This invention relates to the field of engine control systems, and more specifically, to an electromagnetic testing method and system for engine control systems based on an open-loop mode. The method includes the following steps: calibrating the test environment according to the electromagnetic test requirements of the engine control system; setting relevant state parameters for the control system's operating mode, adjusting the drive unit speed to ensure the alternator operates at a specified speed, and setting the excitation device to cause the speed sensor to output a specified signal; monitoring and recording the controller's transmission data; applying test-level electromagnetic excitation to the control system; monitoring changes in key signals during the test, and sequentially completing the test at all test points; stopping the application of the electromagnetic excitation signal, and repeating the above steps according to the control system's operating mode until the electromagnetic test of the control system is completed. This invention improves test safety, reduces test complexity, and increases the efficiency of electromagnetic compatibility design and test verification for engine control systems.

Description

Technical Field

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

[0002] To ensure that the engine control system functions without being affected by electromagnetic interference in harsh electromagnetic environments, such as lightning, HIRF (high-intensity radiated field), and EMI (electromagnetic interference), electromagnetic tests are required during both the design verification and airworthiness certification phases. These tests demonstrate that the engine control system can operate reliably and normally in electromagnetic environments, thereby ensuring aircraft flight safety.

[0003] Currently, most electromagnetic testing methods for engine control systems utilize a closed-loop mode with fuel input. This closed-loop testing method uses a pressurized fuel system to drive a mechanical-hydraulic device, achieving a small closed loop for regulating fuel supply. Simultaneously, a simplified engine simulation model is used to achieve a large closed loop for controlling engine speed and thrust. Real-time monitoring of the functional performance of the tested control system is necessary during the closed-loop testing process.

[0004] In order to ensure the sufficiency of the design verification and airworthiness compliance assessment of the aero-engine control system, 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] Electromagnetic testing methods based on closed-loop modes require the use of fuel to achieve small and large closed loops in the control system, resulting in complex test setups, numerous test equipment, high difficulty, high cost, long cycle, and high test safety risks.

[0006] Furthermore, electromagnetic testing methods based on closed-loop mode require re-performing electromagnetic tests if the control system application software is changed, thus extending the engine control system development cycle.

[0007] The closed-loop electromagnetic testing method requires simultaneous application of electromagnetic excitation to all measurement points, increasing the dependence on the number of electromagnetic excitation devices, resulting in high testing costs and implementation difficulties. Summary of the Invention

[0008] The purpose of this invention is to provide an open-loop electromagnetic testing method for engine control systems, which solves the problems of existing electromagnetic testing methods for engine control systems, such as the need for hydraulic fuel, poor test safety, complex setup, high difficulty, high cost, and long cycle.

[0009] To achieve the above objectives, the present invention provides an electromagnetic testing method for an engine control system based on an open-loop mode, comprising the following steps:

[0010] Step S1: According to the electromagnetic test items 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 points;

[0011] Step S2: Set the relevant status parameters of the control system operation mode, adjust the speed of the drive device so that the alternator works at the specified speed, set the excitation device so that the speed sensor outputs a specified signal, so that the engine control system operates in the test specified operation mode;

[0012] Step S3: Monitor and record the controller's transmission data;

[0013] Step S4: Apply test-level electromagnetic excitation to the control system;

[0014] Step S5: Monitor the changes in key signals during the test, and complete the test at 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 electromagnetic test items for the engine control system include:

[0017] Voltage spike test, power line audio conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cable, induced signal sensitivity - induced electric field of interconnecting cable, induced signal sensitivity - induced spike of interconnecting cable, radio frequency conduction sensitivity test, lightning induced transient sensitivity test, induced signal sensitivity - induced magnetic field of equipment, electrostatic discharge test and radio frequency radiation sensitivity test.

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

[0019] The electromagnetic test items for the engine control system are: sensitivity to induced magnetic field of equipment and electrostatic discharge test. The test points are located at the designated electronic equipment of the control system.

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

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

[0022] In one embodiment, the controller transmits data including system input / output parameters and internal performance status parameters.

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

[0024] In one embodiment, step S6 is further followed by:

[0025] By conducting 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 device for conducting interference signals;

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

[0028] To achieve the above objectives, the present invention provides an electromagnetic testing system for an engine control system based on an open-loop mode, used to execute the method described above, comprising an engine control system, an excitation device, a system monitoring host computer, a human-machine interface for the testing device, an electromagnetic excitation source, and an electromagnetic excitation calibration and measurement device.

[0029] The engine control system includes a controller, a sensor array, cables, and a generator;

[0030] The sensor group includes a speed sensor, and an excitation device is set to make the speed sensor output a specified signal;

[0031] The controller receives and processes the collected signals from 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 status fed back by the electromagnetic excitation calibration and measurement equipment.

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

[0035] The electromagnetic excitation calibration and 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 electromagnetic test system for the engine control system based on open-loop mode further includes an aircraft power supply and an aircraft load simulation device.

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

[0038] The generator is driven by a drive unit via a drive shaft to supply power to the controller;

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

[0040] The aircraft load simulation equipment provides the controller with aircraft load simulation signals.

[0041] The electromagnetic testing method and system for engine control systems based on open-loop mode provided by this invention obtains the electromagnetic response output of the engine control system by applying electromagnetic interference input. It eliminates the need for mechanical hydraulic actuation devices and fuel closed-loop control steps, thereby improving test safety, reducing test complexity and difficulty, and increasing the efficiency of electromagnetic compatibility design and test verification of engine control systems. Attached Figure Description

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

[0043] Figure 1 A schematic 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 The diagram illustrates the operation steps of an electromagnetic test system for an engine control system based on an open-loop mode according to an embodiment of the present invention.

[0045] Figure 3 A flowchart of an electromagnetic testing 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 labels in the figures are as follows:

[0047] 100 shielded rooms;

[0048] 110 controller;

[0049] 120 pressure sensor;

[0050] 130 temperature sensor;

[0051] 140 RPM sensor;

[0052] 150 other sensors;

[0053] 160 cable;

[0054] 170 AC generator;

[0055] 180 drive unit;

[0056] 181 drive shafts;

[0057] Other accessories for System 190;

[0058] 200 monitoring rooms;

[0059] 210 shielded cable;

[0060] 220 System Monitoring Host Computer;

[0061] 230 Test Equipment Human-Machine Interface;

[0062] 240 RF radiating 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 supply;

[0067] 290 aircraft load simulation equipment;

[0068] 300 excitation device. Detailed Implementation

[0069] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0070] Figure 1 A schematic 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. Figure 1 As shown, the electromagnetic test system for engine control system based on open-loop mode proposed in this invention includes an engine control system, an excitation device 300, a system monitoring host computer 220, a test device human-machine interface 230, an electromagnetic excitation source, and an electromagnetic excitation calibration and measurement device.

[0071] The engine control system under test, located in the shielded room 100, mainly includes a controller 110, a pressure sensor 120, a temperature sensor 130, a speed sensor 140, other sensors 150, cables 160, an alternator 170, and other system accessories 190.

[0072] The alternator 170 is driven by the drive unit 180 through the drive shaft 181, and the alternator 170 supplies power to the controller 110 through the cable 160 when it is running.

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

[0074] Various sensors, such as pressure sensor 120, temperature sensor 130, and speed sensor 140, feed back relevant electrical signals to controller 110 via cable 160. Controller 110 receives the collected signals from the sensor group and processes them through internal open-loop test software.

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

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

[0077] The important or key signals to be monitored are generally determined by the electromagnetic test subjects of the engine control system.

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

[0079] The engine control system input and output states are kept stable. Different control system operation modes are defined to represent the operating state of the engine control system under different operating conditions. A specified electromagnetic excitation signal is applied to the system as a disturbance signal. The fluctuations and changes of the control system input and output signals during the electromagnetic test are monitored and recorded by the host computer software.

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

[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 and 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 radio frequency radiation signal transmitting antenna 240 or the conducted interference signal device 250 arranged in the shielded room 100 through the human-machine interface 230 of the test equipment arranged in the monitoring room 200, and monitors the real-time electromagnetic environment status fed back by the radio frequency radiation signal receiving antenna 260 or the conducted interference signal measuring device 270 in the shielded room 200.

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

[0086] like Figure 1 As shown, the electromagnetic test system for engine control system based on open-loop mode proposed in this invention connects all devices in the system based on the principle of electromagnetic induction, sets them to the selected operating mode, and uses devices such as coils, injection probes, and antennas to couple the test levels specified in different test subjects into the system through cable induction or radiation, monitor the system's working status, and determine whether the system performance meets the requirements.

[0087] like Figure 1 As shown, the open-loop mode electromagnetic test system for engine control systems proposed in this invention does not require the use of hydraulic fuel or control actuators, thus avoiding the potential risks associated with the use of hydraulic fuel in electromagnetic tests in existing closed-loop mode electromagnetic test methods. This improves test safety, reduces test complexity and difficulty, and lowers test costs.

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

[0089] The electromagnetic testing system for engine control systems based on open-loop mode proposed in this invention eliminates the need for hydraulic fuel and control actuators. The controller employs open-loop testing software based on open-loop mode, thus eliminating the closed-loop control logic in the engine control system product software. This also eliminates the need for mechanical hydraulic actuators to control the fuel required for closed-loop mode testing, ensuring that the system output can be controlled in a stable state according to the communication instructions from the host computer. At the same time, the design update of the open-loop testing software for the engine control system based on open-loop mode does not require re-performing control system-level electromagnetic tests, thereby improving the efficiency of electromagnetic compatibility design and testing verification of the engine control system.

[0090] Figure 2 The following diagram illustrates the operation steps of an electromagnetic test system for an engine control system based on an open-loop mode according to an embodiment of the present invention: Figure 2 As shown, this 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-machine interface of the test equipment, exposes the control system to lightning, HIRF, and EMI environments at specified levels, and monitors the input and output signal data and component status and performance of the control system by the host computer. The electromagnetic response generated by the control system under different operating modes is obtained. Finally, the control system is analyzed and verified to meet the design technical requirements after the test.

[0091] Figure 3 A flowchart of an electromagnetic testing method for an engine control system based on an open-loop mode according to an embodiment of the present invention is disclosed, as follows: Figure 3 As shown, the present invention proposes an electromagnetic testing method for an engine control system based on open-loop mode, comprising the following steps:

[0092] Step S1: According to the electromagnetic test items 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 points;

[0093] Step S2: Set the relevant status parameters of the control system operation mode, adjust the speed of the drive device so that the alternator works at the specified speed, set the excitation device so that the speed sensor outputs a specified signal, so that the engine control system operates in the test specified operation mode;

[0094] Step S3: Monitor and record the controller's transmission data;

[0095] Step S4: Apply test-level electromagnetic excitation to the control system;

[0096] Step S5: Monitor the changes in key signals during the test, and complete the test at 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 to existing electromagnetic testing methods based on closed-loop mode, the present invention proposes an electromagnetic testing method for engine control systems based on open-loop mode. This method obtains the electromagnetic response output of the engine control system by applying electromagnetic interference input, eliminating the need for mechanical hydraulic actuators and fuel closed-loop control steps.

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

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

[0101] For different test subjects, there are corresponding test points in different locations.

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

[0103] The electromagnetic test items for the engine control system are: sensitivity to induced magnetic field of equipment and electrostatic discharge test. The test points are located at the designated electronic equipment of the control system.

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

[0105] The following example uses radio frequency radiation susceptibility testing, combined with... Figure 1 The electromagnetic testing system described in this invention illustrates the electromagnetic testing method for an engine control system based on open-loop mode, specifically including the following steps:

[0106] Step S1: According to the electromagnetic test subject of the engine control system, the tester calibrates the radio frequency radiation signal transmitting antenna 240 and receives the feedback signal through the radio frequency radiation signal receiving antenna 260, and performs test environment calibration at the corresponding test test points to confirm that the electromagnetic environment in the shielded room 100 reaches the test level.

[0107] After the test level meets the standard, the electromagnetic excitation source is turned off to ensure that there are no electromagnetic interference signals in the shielded room.

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

[0109] Step S2: The controller 110 sets the relevant status parameters of the control system operation mode in the internal open-loop software, adjusts the speed of the drive device 180 so that the alternator works at the specified speed, 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 operating mode should be set so that each input and output signal can represent the typical operating conditions of the engine.

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

[0112] Tests related to aircraft power supply (e.g., voltage spike test, power line audio conduction sensitivity test) are conducted under both aircraft power supply and AC generator power supply modes. For other sensitivity tests, the same type of output interface can be set to different states to reduce test time.

[0113] It should be noted that the engine control system operates in modes including, but not limited to, various ground and air operation modes such as aerial cruise.

[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 is tested, saving testing costs and engine control system product development costs.

[0115] Step S3: Enable the open-loop software data monitoring and recording function in the system monitoring host computer 220, and 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 controller transmits data including but not limited to system input / output parameters and internal performance status parameters.

[0117] The system monitors the host computer 220, and the recorded data is analyzed and determined after testing to assess the impact of electromagnetic interference on the overall thrust of the engine.

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

[0119] Step S5: Monitor the changes in key signals during the test, complete the test at the current test point according to the test requirements, and save the received data on the system monitoring host computer 220.

[0120] In this embodiment, the test point is the entire control system. The test is completed once the current test point is completed.

[0121] If the current test subject has multiple test points, such as voltage spike test, power line audio conduction sensitivity 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, radio frequency conduction sensitivity test, lightning induced transient sensitivity test, induced signal sensitivity - induced magnetic field on equipment, and electrostatic discharge test, then the above four steps shall be performed sequentially for each test point according to the test requirements.

[0122] Step S6: Stop applying the electromagnetic excitation signal. Repeat 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, step S6 further includes:

[0124] By conducting 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, closed-loop simulation analysis of the engine model is used to analyze the data recorded and saved by the system monitoring host computer to determine the impact of signal fluctuations on the function of the control system and to 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 the engine simulation model used in the large closed loop of the electromagnetic test method based on closed-loop mode.

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

[0128] Compared with existing technologies, the electromagnetic test system and method for engine control systems based on open-loop mode proposed in this invention, for verifying the electromagnetic compatibility of control systems, has the following beneficial effects:

[0129] 1) In the electromagnetic test based on the open-loop mode, there is no need to use hydraulic fuel or control actuators, which improves test safety, reduces test costs, and reduces test complexity.

[0130] 2) The controller adopts open-loop test software based on open-loop mode, eliminating the closed-loop control logic in the engine control system product software. When the design of the open-loop test software of the engine control system is updated or the engine dynamic characteristics change, it is not necessary to re-conduct system-level electromagnetic tests, which improves the efficiency of electromagnetic compatibility design and test verification of the control system and saves test costs and engine product development costs.

[0131] 3) It eliminates the need to inject electromagnetic excitation signals into multiple test points simultaneously, allowing each test point interface to perform electromagnetic tests independently. This reduces the dependence on the number of electromagnetic excitation generating devices, lowers test costs, and avoids the problem of not being able to inject multiple wire harnesses simultaneously when the injection probe size is too large.

[0132] 4) By setting the control system operating modes to represent various typical operating conditions of the engine through the controller and its open-loop test software, aircraft load simulation equipment, alternator, etc., the electromagnetic compatibility of the engine control system can be comprehensively assessed throughout the entire operation process.

[0133] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0134] Those skilled in the art will understand that information, signals, and data can be represented using any of a variety of different techniques and arts. For example, the data, instructions, commands, information, signals, bits, symbols, and chips described throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light 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 can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in a generalized manner 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. Those skilled in the art may implement the described functionality in different ways for each specific application, but such implementation decisions should not be construed as departing from the scope of the invention.

[0136] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or performed using 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. The general-purpose processor may be a microprocessor, but in alternatives, it 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, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0137] The steps of the methods or algorithms 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 both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor such that the processor can read and write information to / from the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and storage medium may reside as discrete components in the user terminal.

[0138] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or through a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection is also legitimately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of a medium. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of these should also be included within the scope of computer-readable media.

[0139] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in 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 that conforms to the innovative features mentioned in the claims.

Claims

1. An electromagnetic testing method for an engine control system based on open-loop mode, characterized in that, Includes the following steps: Step S1: According to the electromagnetic test items 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 points; Step S2: Set the relevant status parameters of the control system operation mode, adjust the speed of the drive device so that the alternator works at the specified speed, set the excitation device so that the speed sensor outputs a specified signal, so that the engine control system operates in the test specified operation mode; Step S3: Monitor and record the controller's transmission data; Step S4: Apply test-level electromagnetic excitation to the control system; Step S5: Monitor the changes in key signals during the test, and complete the test at 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 for an engine control system based on open-loop mode according to claim 1, characterized in that, The electromagnetic test items for the engine control system include: Voltage spike test, power line audio conduction sensitivity test, induced signal sensitivity - induced magnetic field of interconnecting cable, induced signal sensitivity - induced electric field of interconnecting cable, induced signal sensitivity - induced spike of interconnecting cable, radio frequency conduction sensitivity test, lightning induced transient sensitivity test, induced signal sensitivity - induced magnetic field of equipment, electrostatic discharge test and radio frequency radiation sensitivity test.

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

4. The electromagnetic test method for an engine control system based on open-loop mode according to claim 1, characterized in that, The relevant status parameters of the control system's operating mode include the corresponding electro-hydraulic servo valve control current output, switch input, and main control channel.

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

6. The electromagnetic test method for an engine control system based on open-loop mode according to claim 1, characterized in that, The controller transmits data including system input / output parameters and internal performance status parameters.

7. The electromagnetic test method for an engine control system based on open-loop mode according to claim 1, characterized in that, Step S6 is followed by: By conducting 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 for an 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 conducted interference signal device; The electromagnetic excitation calibration and measurement equipment 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 open-loop mode, used to perform the method as described in any one of claims 1 to 8, characterized in that, This includes the engine control system, excitation equipment, system monitoring host computer, human-machine interface for testing equipment, electromagnetic excitation source, and electromagnetic excitation calibration and measurement equipment. The engine control system includes a controller, a sensor array, cables, and a generator; The sensor group includes a speed sensor, and an excitation device is set to make the speed sensor output a specified signal; The controller receives and processes the collected signals from 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 status fed back by the electromagnetic excitation calibration and measurement equipment. The electromagnetic excitation source is used to generate electromagnetic excitation signals; The electromagnetic excitation calibration and 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 for an engine control system based on open-loop mode according to claim 9, characterized in that, It also includes aircraft power supplies and aircraft load simulation equipment; The electromagnetic test system for the engine control system also includes a drive unit and a drive shaft; The generator is driven by a drive unit via a drive shaft to supply power to the controller; The aircraft power supply provides power to the controller; The aircraft load simulation equipment provides the controller with aircraft load simulation signals.

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