Engine control system radio frequency test method and system

Abstract

The invention relates to the technical field of engine control system tests, in particular to an engine control system radio frequency test method and system. The method comprises the following steps: integrating a plurality of accessories to obtain a to-be-tested engine control system; setting operation modes of a plurality of engine control systems according to the operation conditions of the engine to be tested; arranging an interference signal measuring device at a measuring point of the engine control system, and measuring an electromagnetic interference signal emitted by the engine control system at the corresponding measuring point; recording electromagnetic interference related signals under each frequency in the frequency range; replacing the measuring point position for repeated measurement; replacing the operation mode of the engine control system, and repeating the test; and comparing the recorded electromagnetic interference related signal with a test criterion, and carrying out optimization design of the engine control system. By setting a plurality of control system operation modes, electromagnetic interference signals at a plurality of measuring points are measured and recorded, the test complexity is reduced, and the test safety is improved.

Description

Technical Field

[0001] This invention relates to the field of engine control system testing technology, and more specifically, to a radio frequency testing method and system for engine control systems. Background Technology

[0002] In the aerospace industry, the design, manufacturing, and verification processes of aero-engines are exceptionally complex. Among these processes, the electromagnetic compatibility (EMC) of the aero-engine control system is a crucial consideration. EMC refers to the ability of a system or device to function normally in its electromagnetic environment without interfering with other systems and equipment.

[0003] During the design verification and airworthiness certification phases of aero-engines, it is necessary to prove that the control system will not adversely affect other systems and equipment during operation, and that the radio frequency emissions of the control system can meet the electromagnetic compatibility requirements of the aero-engine.

[0004] To ensure that electromagnetic interference signals emitted by the aircraft engine control system during operation do not adversely affect the engine or other systems, radio frequency emission tests of the control system must be conducted during the design verification phase.

[0005] Radio frequency (RF) emissions refer to electromagnetic interference signals emitted by the control system during operation. This interference can originate from multiple engine accessories, such as sensors, solenoid valves, and alternators. Aero-engine control systems often contain more than fifty such accessories, tightly interconnected by over 20 bundles of cables. These cables include power supply cables connected to the aircraft's power source and interconnecting cables for transmitting signals within the control system. This complex interconnection makes accurately locating and controlling electromagnetic interference at various frequencies during testing exceptionally difficult. It is challenging to determine whether the electromagnetic interference emitted by the control system at each frequency exceeds limits or meets electromagnetic compatibility design requirements.

[0006] What makes things more complicated is that the operating mode of the control system changes under different engine operating conditions, which directly affects the level of electromagnetic interference emitted by the control system to the outside world, and may generate electromagnetic interference of different intensities and frequencies.

[0007] Furthermore, the corresponding control system operates in different modes when the engine is running under different conditions, resulting in different electromagnetic interference emitted to the outside world.

[0008] Therefore, when evaluating the electromagnetic compatibility design of the control system during the design verification phase, due to the high cost and difficulty of implementation of the test, there is an urgent need for a radio frequency emission test method and system for engine control systems. Summary of the Invention

[0009] The purpose of this invention is to provide a method and system for testing the radio frequency transmission of an engine control system, thereby solving the problems of high cost and difficulty in implementation of radio frequency transmission tests on engine control systems in the prior art.

[0010] To achieve the above objectives, the present invention provides a method for testing the radio frequency transmission of an engine control system, comprising the following steps:

[0011] Step S1: Integrate several accessories to obtain the engine control system to be tested;

[0012] Step S2: Set several operating modes of the engine control system according to the operating conditions of the engine to be tested;

[0013] Step S3: Place the interference signal measuring device at the measuring point of the engine control system. Under the set operating mode of the engine control system, measure the electromagnetic interference signal emitted by the engine control system at the corresponding measuring point.

[0014] Step S4: Record the electromagnetic interference-related signals at each frequency within the frequency range;

[0015] Step S5: Change the position of the measuring point and repeat steps S3 to S4 until all measuring points have been measured.

[0016] Step S6: Change the operating mode of the engine control system, and repeat steps S3 to S5 until the operating modes of all engine control systems have been tested.

[0017] Step S7: Compare the recorded electromagnetic interference-related signals with the experimental criteria to optimize the design of the engine control system.

[0018] In some embodiments, the engine operating conditions include engine ground start mode and engine in-flight flight mode.

[0019] In some embodiments, the operating mode of the engine control system includes setting the input and output variables of the controller, turning on the aircraft power supply, setting the speed of the alternator, controlling the ignition state of the ignition system, and setting the output speed signal of the engine rotor speed sensor.

[0020] In some embodiments, the measuring points of the engine control system are located on the cable harness connected to the electronic equipment of the engine control system, at a certain distance from the electrical connector of the electronic equipment.

[0021] In some embodiments, the measuring points of the engine control system are located on the power line connecting the engine control system to the aircraft power supply, and / or on the interconnecting cables inside the engine control system.

[0022] In some embodiments, the interference signal measuring device includes a caliper-type interference signal measuring device.

[0023] In some embodiments, the electromagnetic interference-related signal is a radio frequency current signal.

[0024] To achieve the above objectives, the present invention provides an engine control system radio frequency emission test system for performing the method described above, comprising an engine control system to be tested, a system monitoring host computer, a test equipment human-machine interface, and an interference signal measurement device:

[0025] The engine control system includes a controller and a sensor array;

[0026] The controller receives and processes the collected signals from the sensor group, and sends the processed data to the system monitoring host computer.

[0027] The system monitors the host computer and sets the input and output signals of the controller according to the engine operating conditions in order to complete the setting of the engine control system operating mode.

[0028] The interference signal measuring device is arranged at the measuring point of the engine control system to measure the electromagnetic interference signals emitted by the control system at the corresponding measuring point.

[0029] The human-machine interface of the test equipment is used to acquire and save the electromagnetic interference signals measured by the interference signal measurement equipment, compare the recorded electromagnetic interference related signals with the test criteria, and optimize the design of the engine control system.

[0030] In some embodiments, the testing system further includes an excitation device;

[0031] The sensor group also includes a speed sensor, which outputs a specified signal by setting an excitation device.

[0032] In some embodiments, the test system further includes aircraft power supply and aircraft load simulation equipment:

[0033] The aircraft power supply provides power to the controller;

[0034] The aircraft load simulation equipment provides the controller with aircraft load simulation signals;

[0035] The engine control system also includes an alternator:

[0036] The alternator is driven by a drive unit via a drive shaft, and when the alternator is running, it supplies power to the controller via a cable.

[0037] This invention provides a method and system for testing the radio frequency emission of an engine control system. It eliminates the need to simulate the installation on the engine casing. Instead, it allows for testing in an indoor environment with a flat metal conductor table. By setting various operating modes of the control system, the electromagnetic interference signals emitted by multiple measurement points of the control system to the outside world can be measured and recorded. This enables a comprehensive evaluation of the electromagnetic interference signals emitted by the control system to the outside world under various operating conditions of the engine in an indoor ground environment, reducing the complexity of the test and improving the safety of the test. Attached Figure Description

[0038] 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:

[0039] Figure 1 A schematic block diagram of an engine control system radio frequency transmission test system according to an embodiment of the present invention is disclosed;

[0040] Figure 2 A flowchart of a radio frequency transmission test method for an engine control system according to an embodiment of the present invention is disclosed;

[0041] Figure 3 A schematic diagram illustrating the location of measuring points according to an embodiment of the present invention is provided;

[0042] Figure 4 A schematic diagram illustrating an engine control system according to an embodiment of the present invention that meets design requirements is provided.

[0043] Figure 5 A schematic diagram is shown illustrating that the engine control system according to an embodiment of the present invention does not meet the design requirements.

[0044] The meanings of the labels in the figures are as follows:

[0045] 100 test rooms;

[0046] 110 controller;

[0047] 120 pressure sensor;

[0048] 130 temperature sensor;

[0049] 140 RPM sensor;

[0050] 150 other sensors;

[0051] 160 cable;

[0052] 170 AC generator;

[0053] 180 drive unit;

[0054] 190 drive shaft;

[0055] 200 monitoring rooms;

[0056] 210 shielded cable;

[0057] 220 System Monitoring Host Computer;

[0058] 230 Test Equipment Human-Machine Interface;

[0059] 240 RF conducted interference signal measurement equipment;

[0060] 250 aircraft power supply;

[0061] 260 aircraft load simulation equipment;

[0062] 300 excitation equipment;

[0063] Other accessories for the 310 system;

[0064] 330 ignition system;

[0065] 401 Electronic Devices;

[0066] 402 electrical connector;

[0067] 403 Interference signal measurement equipment;

[0068] 404 cable harness. 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] This invention proposes a method and system for testing the radio frequency (RF) emission of an engine control system. This system is used to verify the compliance of the RF emission of the control system during the design verification phase. It does not require simulating the installation on the engine casing. Instead, it only requires setting up multiple operating modes of the control system on an indoor metal conductor tabletop, measuring and recording the electromagnetic interference signals (RF current) emitted by the control system at more than 20 measurement points. This allows for a comprehensive evaluation of the electromagnetic interference signals emitted by the control system to the outside world under various operating conditions of the engine.

[0071] Test personnel can use a human-computer interface to measure and record electromagnetic interference signals at various test points, and compare them with test criteria to determine whether there are excessive radio frequency emissions at each test point of the control system and the corresponding excessive frequencies. This method and system provide a basis and technical support for optimizing the electromagnetic compatibility design of control systems.

[0072] Figure 1 A schematic diagram of a radio frequency transmission test system for an engine control system according to an embodiment of the present invention is disclosed, such as... Figure 1 As shown, the engine control system radio frequency emission test system proposed in this invention includes the engine control system to be tested, excitation device 300, system monitoring host computer 220, test equipment human-machine interface 230, and radio frequency conducted interference signal measurement device 240.

[0073] The engine control system to be tested is located in test chamber 100, which may be a shielded room.

[0074] The engine control system to be tested mainly includes a controller 110, a sensor group, a cable 160, an ignition system 330, an alternator 170, and other system accessories 310.

[0075] The sensor group includes a pressure sensor 120, a temperature sensor 130, a speed sensor 140, and other sensors 150.

[0076] 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 collects and processes the sensor signals.

[0077] The controller 110 receives and processes the collected signals from the sensor group, and sends the processed data to the system monitoring host computer 220.

[0078] The system monitoring host computer 220, located in the monitoring room 200, sets the input and output signals of the controller 110 to represent the typical operating conditions of the engine through the shielded cable 210, thereby completing the setting of the engine control system operating mode.

[0079] The radio frequency conducted interference signal measuring device 240 serves as an interference signal measuring device and is arranged at the measuring point of the engine control system to measure the electromagnetic interference signals emitted by the control system at the corresponding measuring point.

[0080] The human-machine interface 230 of the test equipment is used to acquire and save the electromagnetic interference signals measured by the interference signal measuring device 240, compare the recorded electromagnetic interference related signals with the test criteria, and optimize the design of the engine control system.

[0081] The tester uses the human-machine interface 230 of the test equipment to read, record, and save the electromagnetic interference emitted by the control system measurement points obtained by the radio frequency conducted interference signal measurement device 240. By comparing the recorded data (i.e., the radio frequency current emitted at the measurement points within the test frequency range) with the limit levels specified in the test criteria, it can be determined whether the radio frequency emission test has passed. If there is an exceedance, special attention needs to be paid to the corresponding frequency points.

[0082] Furthermore, the alternator 170 is driven by the drive unit 180 through the drive shaft 190, and the alternator 170 supplies power to the controller 110 through the cable 160 when it is running.

[0083] Furthermore, the aircraft power supply 250 and the aircraft load simulation equipment 260, located in the monitoring room 200, provide power to the controller 110 and transmit aircraft-related load simulation electrical signals, respectively, via cable 160.

[0084] Furthermore, the radio frequency conducted interference signal measuring device 240 is a caliper-type interference signal measuring device, such as a current measuring caliper.

[0085] Furthermore, by adjusting the excitation device 300, the speed sensor 140 outputs a specified signal.

[0086] Furthermore, the ignition system 330 is connected to the controller 110 and, according to the instructions of the controller 110, can be in an ignition state or remain in an off-ignition state.

[0087] This invention proposes a radio frequency transmission test method for an engine control system, which can be achieved through methods such as... Figure 1 The engine control system radio frequency transmission test system shown is used to achieve this.

[0088] Figure 2 A flowchart of an engine control system radio frequency transmission test method according to an embodiment of the present invention is disclosed. The present invention proposes an engine control system radio frequency transmission test method, comprising the following steps:

[0089] Step S1: Integrate several accessories to obtain the engine control system to be tested;

[0090] Step S2: Set several operating modes of the engine control system according to the operating conditions of the engine to be tested;

[0091] Step S3: Place the interference signal measuring device at the measuring point of the engine control system. Under the set operating mode of the engine control system, measure the electromagnetic interference signal emitted by the engine control system at the corresponding measuring point.

[0092] Step S4: Record the electromagnetic interference-related signals at each frequency within the frequency range;

[0093] Step S5: Change the position of the measuring point and repeat steps S3 to S4 until all measuring points have been measured.

[0094] Step S6: Change the operating mode of the engine control system, and repeat steps S3 to S5 until the operating modes of all engine control systems have been tested.

[0095] Step S7: Compare the recorded electromagnetic interference-related signals with the experimental criteria to optimize the design of the engine control system.

[0096] The radio frequency transmission tests were conducted under two power supply modes: one where the aircraft power supply powered the controller and the other where the AC generator powered the controller.

[0097] These steps will be described in detail below. It should be understood that, within the scope of this invention, the above-described technical features of this invention and the technical features specifically described below (such as in the embodiments) can be combined and related to each other to form preferred technical solutions.

[0098] Step S1: Integrate several accessories to obtain the engine control system to be tested;

[0099] The accessories that make up the control system of the engine under test are connected to the integrated control system via cables.

[0100] Step S2: Based on the operating conditions of the engine to be tested, set several operating modes of the engine control system.

[0101] The operating mode of the engine control system under test is set according to the operating conditions of the engine to be tested.

[0102] In some embodiments, typical engine operating conditions include at least: engine ground start-up mode and engine in-flight flight mode. Given that the number of test modes selected in actual testing is directly proportional to the required manpower, time, and economic costs, representative modes are typically selected during testing, ensuring that the selected modes comprehensively cover all operating conditions the engine may encounter in actual operation, thereby achieving efficient and economical testing objectives.

[0103] The operating modes of the engine control system include, but are not limited to: setting the input and output variables of the controller through the system monitoring host computer, turning on the aircraft power supply located in the monitoring room, setting the speed of the alternator, controlling the ignition status of the ignition system, and setting the output speed signal of the engine rotor speed sensor.

[0104] When the engine is under different operating conditions, the engine control system operates in different modes.

[0105] For example, if the engine is operating in ground start mode, the engine control system operating mode settings should include the following:

[0106] Turn on the aircraft's power supply;

[0107] The engine rotor speed sensors are all set to the minimum detectable speed of their respective rotors;

[0108] The alternator speed is set to zero;

[0109] The ignition system is in the ignition state;

[0110] The control current output of the electro-hydraulic servo valve is set to the typical output current during normal engine operation.

[0111] All digital inputs are set to closed.

[0112] If the engine is operating in in-flight mode, the engine control system operating mode settings should include the following:

[0113] Turn on the aircraft's power supply;

[0114] The engine rotor speed sensors are all set to measure the redline speed of the engine rotor.

[0115] The alternator speed is set to the speed corresponding to the engine's redline speed;

[0116] The ignition system is in a non-ignition state;

[0117] The control current output of the electro-hydraulic servo valve is set to zero.

[0118] All digital inputs are set to off.

[0119] Step S3: Place the interference signal measuring device at the measuring point of the engine control system. Under the set operating mode of the engine control system, measure the electromagnetic interference signal emitted by the control system at the corresponding measuring point.

[0120] Furthermore, the electromagnetic interference-related signal is a radio frequency current signal.

[0121] In some embodiments, the measuring points of the engine control system are located on the cable harness connected to the electronic equipment of the engine control system, at a certain distance from the electrical connector of the electronic equipment.

[0122] Figure 3 A schematic diagram illustrating the location of measuring points according to an embodiment of the present invention is shown, such as... Figure 3 As shown, Figure 3As shown, the measuring point is set at a certain distance d from the electrical connector 402 of the electronic device 401 on the cable harness 404 connected to the electronic device 401. The interference signal measuring device 403 is arranged on the cable harness 404 at a distance d from the electrical connector 402 to measure the electromagnetic interference signal emitted by the control system at this measuring point.

[0123] Preferably, the distance d is 5cm, which is a commonly used distance in the industry. Preferably, the interference signal measuring device 403 is a current measuring caliper.

[0124] Common electronic devices 401 in engine control systems include, but are not limited to: engine electronic controller, engine monitoring device, pressure processing unit, metal chip sensor processing unit, cooling fan and thrust reverser control unit, etc.

[0125] Each electronic device in the engine control system is equipped with multiple electrical connectors. Because the engine control system has multiple electronic devices, and each electronic device has multiple electrical connectors, the control system has more than twenty measurement points.

[0126] These measuring points are set on the cables connected to the controller, and their distribution is determined by the design of the engine control system. The locations of the measuring points can be roughly divided into two categories:

[0127] One type is located on the power supply line that connects the engine control system to the aircraft's power supply.

[0128] Another type is the interconnecting cables located inside the control system.

[0129] Given the different requirements of these two types of test points regarding the level of test criteria, the test points are divided into the two main categories mentioned above. The power supply lines connected to the aircraft's power supply have lower shielding performance and are primarily used for transmitting high-intensity electrical energy; while the engine control system interconnection cables have higher shielding performance and are primarily used for transmitting electrical signals. This classification helps ensure that all types of cables meet their specific technical requirements and safety standards in testing and practical applications.

[0130] Step S4: Record the electromagnetic interference-related signals at each frequency within the frequency range.

[0131] The interference current level emitted to the outside at each measurement point within a specified frequency range is recorded through the human-machine interface of the test equipment.

[0132] After the test at the current measurement point is completed, the measurement data will be saved on the human-machine interface of the test equipment.

[0133] Step S5: Change the position of the measuring point and repeat steps S3 to S4 until all measuring points have been measured.

[0134] Change the measurement point location, i.e. the cable location where the caliper-type interference signal measurement equipment is installed, and repeat steps S3 to S4.

[0135] Step S6: Repeat steps S3 to S5 according to the operating mode of the engine control system until the operating modes of all engine control systems have been tested.

[0136] Change the engine control system operating mode (including changing the alternator speed, speed sensor speed, aircraft load simulation equipment settings, etc.), and repeat steps S3 to S5.

[0137] Step S7: Compare the recorded electromagnetic interference-related signals with the experimental criteria to optimize the design of the engine control system.

[0138] Compare the voltage levels recorded in step S4 with the test criteria, and optimize the electromagnetic protection design of the tested control system according to actual engineering needs. If the electromagnetic protection design is optimized, steps S1 to S6 can be repeated according to actual engineering needs.

[0139] The purpose of radio frequency emission testing of the control system is to ensure that electromagnetic interference signals unintentionally emitted by the developed engine control system do not exceed the specified levels. Exceeding the specified levels (i.e., the designated voltage levels) may pose a threat to flight safety.

[0140] "Test criteria" embody the technical requirements specified when designing the engine control system, namely, that the level of stray signals emitted by the engine control system must not exceed a specified standard. This technical indicator, also known as "design requirement," is typically expressed as: "The design of the engine control system should ensure that the level of stray signals unintentionally emitted by the control system is lower than the level of Class XX in Chapter XX of the xxx Industry Standard." This specified level requirement is based on industry standards, model engineering experience, or a joint definition by the aircraft designer to whom the engine is matched.

[0141] Figure 4 A schematic diagram illustrating an engine control system according to an embodiment of the present invention, demonstrating that the system meets design requirements, is shown below. Figure 4 As shown, the measurement data at a certain measuring point did not exceed the design requirements, indicating that the stray signals emitted by the control system did not exceed the specified value. Therefore, the test was passed, demonstrating that the current control system design at this measuring point meets the design requirements.

[0142] Figure 5 A schematic diagram illustrating that an engine control system according to an embodiment of the present invention does not meet design requirements is shown, such as... Figure 5As shown, the measurement data at a certain measuring point exceeds the design requirements, indicating that the stray signals emitted by the control system exceed the specified values. Therefore, the test fails, and a thorough analysis of the reasons for the exceedance is needed.

[0143] 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.

[0144] This invention proposes a method and system for testing the radio frequency (RF) emissions of an engine control system. By setting parameters such as the input and output variables of the controller, the speed of the alternator, and the speed of the speed sensor in the control system, the control system is made to operate in a mode that represents the typical operating conditions of the engine. In an indoor ground environment, it is possible to measure and record the electromagnetic interference signals (RF current) emitted by the control system to the outside world through various measurement points (located on the power lines connected to the aircraft and the interconnecting cables for transmitting signals within the control system) under various operating modes.

[0145] Testers can use radio frequency interference signal measurement equipment to measure at various test points (located on the power lines connected to the aircraft and the interconnecting cables that transmit signals inside the control system). They can record and save electromagnetic interference signals through a human-machine interface, and compare the electromagnetic interference-related signals with test criteria to determine whether there are radio frequency emission exceedances at each test point of the control system and the corresponding specific exceedance frequencies. This provides a strong basis and technical support for optimizing the electromagnetic compatibility design of the control system.

[0146] Compared with the prior art, the radio frequency testing method and system for engine control systems proposed in this invention have the following advantages:

[0147] 1) By adjusting the alternator speed and measuring the speed using the engine rotor speed sensor, different control system operating modes and their corresponding typical engine operating conditions can be simulated, thereby comprehensively evaluating the electromagnetic interference signals (radio frequency current) emitted by the control system to the outside world under various engine operating conditions.

[0148] 2) Using the same measurement method, it is possible not only to measure the radio frequency current emitted to the outside from the power supply line (which has low shielding and transmits high electrical energy) connected to the aircraft power supply and the engine control system interconnection cable (which has high shielding and transmits electrical signals), but also to effectively assess the impact of cable shielding and the transmitted energy on electromagnetic interference emission and the differences thereto.

[0149] 3) There is no need to simulate the installation and installation status of the control system on the engine. The test measurement can be completed in an indoor ground environment (such as a test table made of metal conductors), which reduces the requirements for the test site and simplifies the installation and connection process of the control system under test.

[0150] 4) By measuring the electromagnetic interference signals emitted by the control system at different frequencies, the frequency points at which high-amplitude electromagnetic interference is emitted at each measuring point of the control system can be determined, providing valuable data for the electromagnetic compatibility design optimization of the control system.

[0151] 5) Since the electromagnetic interference emitted to the outside world is recorded and saved through the human-computer interaction interface, and the system monitors the upper computer to set the input and output variables of the controller, no fuel is needed during the test, thereby reducing the complexity of the test and improving the safety of the test.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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 engine control system radio frequency emissions test method, comprising: The method comprises the following steps: Step S1, integrating several accessories to obtain an engine control system to be tested; Step S2, setting operation modes of the engine control system according to operation conditions of the engine to be tested; Step S3, arranging an interference signal measuring device at a measuring point of the engine control system, measuring electromagnetic interference signals emitted by the engine control system at the corresponding measuring point under the set operation mode of the engine control system; Step S4, recording electromagnetic interference related signals at each frequency in a frequency range; Step S5, repeating steps S3 to S4 by changing the measuring point until all measuring points are measured; Step S6, repeating steps S3 to S5 by changing the operation mode of the engine control system until all operation modes of the engine control system are tested; Step S7, comparing the recorded electromagnetic interference related signals with test criteria to optimize the design of the engine control system.

2. The engine control system radio frequency emissions test method of claim 1, wherein, The engine operation conditions include an engine ground starting mode and an engine in-flight mode.

3. The engine control system radio frequency emissions test method of claim 1, wherein, The operation modes of the engine control system include setting input and output variables of the controller, turning on the aircraft power supply, setting the rotating speed of the alternator, controlling the ignition state of the ignition system, and setting the output rotating speed signal of the engine rotor speed sensor.

4. The engine control system radio frequency emissions test method of claim 1, wherein, The measuring points of the engine control system are arranged on the cable harness connected to the electronic device of the engine control system and are located at a certain distance from the electronic device connector.

5. The engine control system radio frequency emissions test method of claim 1, wherein, The measuring points of the engine control system are arranged on the power supply line connected to the aircraft power supply of the engine control system and / or on the interconnection cable inside the engine control system.

6. The engine control system radio frequency emissions test method of claim 1, wherein, The interference signal measuring device includes a clamp-on interference signal measuring device.

7. The engine control system radio frequency emissions test method of claim 1, wherein, The electromagnetic interference related signals are radio frequency current signals.

8. An engine control system radio frequency emissions test system for performing the method of any one of claims 1 to 7, characterized by, The method comprises an engine control system to be tested, a system monitoring host computer, a test equipment human-computer interaction interface, and an interference signal measuring device: The engine control system comprises a controller and a sensor group; The controller receives and processes the collected signals fed back by the sensor group and sends the processed data to the system monitoring host computer; The system monitoring host computer sets the input and output signals of the controller according to the engine operation conditions to complete the setting of the operation mode of the engine control system; The interference signal measuring device is arranged at the measuring point of the engine control system to measure the electromagnetic interference signals emitted by the control system at the corresponding measuring point; The test equipment human-computer interaction interface is used to obtain and save the electromagnetic interference signals measured by the interference signal measuring device, compare the recorded electromagnetic interference related signals with test criteria, and optimize the design of the engine control system.

9. The engine control system radio frequency emissions test system of claim 8, wherein, Further comprising an excitation device; The sensor group further comprises a rotating speed sensor, and the rotating speed sensor outputs a specified signal by setting the excitation device.

10. The engine control system radio frequency emissions test system of claim 8, wherein, Further comprising an aircraft power supply and an aircraft load simulation device: The aircraft power supply provides power for the controller; The aircraft load simulation device provides aircraft load simulation signals for the controller; The engine control system further comprises an alternator: The alternator is driven in operation by the drive device via the drive shaft, and the controller is supplied with power by the cable during operation of the alternator.

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