Starter over-rotation protection control method and system, electronic equipment and storage medium

Abstract

The invention discloses a starter over-rotation protection control method and system, electronic equipment and a storage medium, and the method comprises the steps: firstly collecting a power turbine transmission chain tail end rotation speed signal and a gas generator rotation speed signal, and then judging whether the gas generator rotation speed reaches a first preset rotation speed or not; and if the rotating speed of the gas generator reaches a first preset rotating speed, the decreasing rate of the rotating speed at the tail end of the power turbine transmission chain is larger than a rotating speed decreasing rate threshold value, and the duration time exceeds preset time, or if the decreasing amplitude of the rotating speed at the tail end of the power turbine transmission chain exceeds a preset value, parking protection is started. If the rotating speed of the gas generator does not reach the first preset rotating speed all the time, it can be judged that the starter is not really ignited, the starter is in the test run test process of starting (oil) sealing, false starting, cold running and the like, at the moment, the power turbine does not have the over-rotating problem, and even if the decreasing rate or the decreasing amplitude of the rotating speed of the tail end of a power turbine transmission chain meets the preset conditions, the engine cannot be ignited. And the parking protection is not started, so that the normal test run test is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of starter over-rotation protection, and in particular to a starter over-rotation protection control method and system, electronic equipment, and a computer-readable storage medium. Background Art

[0002] The gas turbine starter is an auxiliary power unit that uses gas instead of electricity to start high-power aircraft engines. It has the characteristics of high speed and small rotational inertia, but it is easy to over-rotate, causing the engine shaft to break and the turbine blades to fly out. In order to prevent the casing from being penetrated and endangering the safety of the engine, aircraft, and personnel, the starter needs to be protected from over-rotation. Since the starter itself does not have an over-rotation protection device, it is necessary to rely on the over-rotation protection system of the engine to protect the auxiliary power unit from over-rotation. However, if the auxiliary power unit breaks teeth, breaks shafts, shaves teeth, etc. during starting and cannot drive the engine to rotate normally, the engine will not over-rotate, and the over-rotation protection device of the engine will not play a role in protecting the auxiliary power unit. Therefore, it is necessary to develop an over-rotation protection device for the starter itself. Therefore, the inventor of the present application has previously proposed an over-speed protection method and device (patent publication number CN110748421A) for over-speed protection of the auxiliary power unit of an aircraft engine. The method collects the atmospheric pressure signal and the speed signal of the power turbine of the auxiliary power unit, and calculates the altitude based on the atmospheric pressure signal. Then, the method further determines whether the speed change rate of the power turbine exceeds the limit according to a set logic algorithm, thereby determining whether the auxiliary power unit is over-speeding and starting the parking protection. This can solve the technical problem that the auxiliary power unit of the existing aircraft engine does not have an over-speed protection function to a certain extent.

[0003] However, in the actual production application process, the inventor of the present application found that: due to the compact structure and limited internal space of the starter, the speed sensor used to detect the speed of the power turbine needs to be installed at the end of the power turbine transmission chain. If the starter reducer input active gear or the intermediate double gear meshes poorly, causing abnormalities such as broken teeth and shaved teeth, the speed collected by the speed sensor cannot reflect the actual power turbine speed, that is, the speed sensor collects the speed at the end of the power turbine transmission chain, not the power turbine speed. The speed change rate monitored by the speed sensor and the logic algorithm of the above patent are not enough to accurately judge the over-speed abnormality, and it is easy to have the problem of misjudgment of over-speed protection. In addition, when the starter is tested on the ground for opening (oil) seals, false starting, cold operation, etc., the change rate of the power turbine speed is likely to fall within the range set for protection, and false alarms are likely to occur, thereby affecting normal test runs. Summary of the invention

[0004] The present invention provides a starter over-speed protection control method and system, electronic equipment, and a computer-readable storage medium, which can accurately judge over-speed abnormalities without the problem of misjudgment of over-speed protection, and will not cause false alarms when performing test runs such as opening (oil) seals, false starting, and cold running, and will not affect normal test runs.

[0005] According to one aspect of the present invention, a starter over-rotation protection control method is provided, comprising the following contents:

[0006] Collect the speed signal of the end of the power turbine transmission chain and the speed signal of the gas generator;

[0007] Determining whether the speed of the gas generator reaches a first preset speed;

[0008] After the gas generator speed signal reaches the first preset speed, if the speed decrease rate at the end of the power turbine transmission chain is greater than the speed decrease rate threshold and the duration exceeds the preset time, or if the speed decrease amplitude at the end of the power turbine transmission chain exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

[0009] Furthermore, the speed reduction rate threshold is calculated based on the following formula:

[0010]

[0011] in, Indicates the speed drop rate threshold, n p ' ,max It represents the maximum speed of the end of the power turbine transmission chain during the starter operation, and a, b, c, and d represent the fitting parameters.

[0012] Furthermore, the following contents are also included:

[0013] After the gas generator speed reaches the second preset speed, if the speed at the end of the power turbine transmission chain exceeds the third preset speed and the increase in the speed at the end of the power turbine transmission chain exceeds the preset value, or if the speed at the end of the power turbine transmission chain exceeds the fourth preset speed, or if the speed signal at the end of the power turbine transmission chain is not detected, the protection shutdown is initiated, wherein the fourth preset speed is greater than the third preset speed.

[0014] Furthermore, the following contents are also included:

[0015] The vibration signal of the reducer casing is collected, and the vibration value of the reducer casing is compared with the vibration threshold. If the vibration value of the reducer casing is greater than the vibration threshold, the parking protection is turned on.

[0016] Furthermore, the vibration threshold is calculated based on the following formula:

[0017] δ=en′ p f

[0018] Where δ represents the vibration threshold, n′ p represents the speed at the end of the power turbine transmission chain, and e and f represent the fitting parameters.

[0019] Furthermore, the following contents are also included:

[0020] Determine whether the duration of the vibration exceeding the limit exceeds the preset time. If it exceeds the preset time, calculate the rising rate of the vibration amount per unit time of the vibration exceeding the limit, and compare the rising rate with the vibration rising rate threshold. If it is greater than the vibration rising rate threshold, start the parking protection.

[0021] Furthermore, the vibration rise rate threshold is calculated based on the following formula:

[0022] Δδ + =gln(n′ p )+h

[0023] Among them, Δδ + represents the vibration rise rate threshold, n′ p represents the speed at the end of the power turbine transmission chain, and g and h represent the fitting parameters.

[0024] In addition, the present invention also provides a starter over-rotation protection control system, comprising:

[0025] The first speed acquisition module is used to acquire the speed signal at the end of the power turbine transmission chain;

[0026] The second speed acquisition module is used to acquire the speed signal of the gas generator;

[0027] The parking protection control module is used to determine whether the gas generator speed reaches a first preset speed, and after the gas generator speed signal reaches the first preset speed, if the speed reduction rate of the power turbine transmission chain end is greater than the speed reduction rate threshold and the duration exceeds the preset time, or if the speed reduction amplitude of the power turbine transmission chain end exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

[0028] In addition, the present invention also provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the steps of the above method by calling the computer program stored in the memory.

[0029] In addition, the present invention also provides a computer-readable storage medium for storing a computer program for performing starter over-rotation protection control, wherein the computer program executes the steps of the method described above when running on a computer.

[0030] The present invention has the following beneficial effects:

[0031] The starter over-speed protection control method of the present invention first collects the speed signal of the end of the power turbine transmission chain and the speed signal of the gas generator, and then determines whether the speed of the gas generator reaches the first preset speed. If the speed of the gas generator reaches the first preset speed, it can be determined that the starter is in the process of normal ignition to start the high-power aircraft engine. At this time, if the rate of decrease of the speed at the end of the power turbine transmission chain is greater than the speed decrease rate threshold and the duration exceeds the preset time, or if the decrease amplitude of the speed at the end of the power turbine transmission chain exceeds the preset value, the parking protection is turned on. After the starter is ignited, if the rate of decrease or the decrease amplitude of the speed at the end of the power turbine transmission chain meets the above preset conditions, it can be determined that the starter reducer input driving gear or the middle double gear is poorly meshed, causing abnormalities such as broken teeth and shaving teeth, thereby causing the power turbine power to be unable to be effectively output, so that the speed at the end of the power turbine transmission chain decreases faster than when it is normally parked, and the over-speed abnormality can be accurately determined, and the interference of sudden abnormal speed data is effectively eliminated, and the problem of misjudgment of over-speed protection will not occur. If the gas generator speed does not reach the first preset speed, it can be determined that the starter has not been truly ignited, and the starter is undergoing test processes such as opening (oil) seal, false start, and cold operation. At this time, the power turbine will not have an over-speed problem. Even if the speed reduction rate or reduction range at the end of the power turbine transmission chain meets the above-mentioned preset conditions, the parking protection will not be activated, and the normal test will not be affected.

[0032] In addition, the starter over-rotation protection control system of the present invention also has the above advantages.

[0033] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 It is a flow chart of a starter over-rotation protection control method according to a preferred embodiment of the present application;

[0036] Figure 2 is another flow chart of the starter over-rotation protection control method of the preferred embodiment of the present application;

[0037] Figure 3 It is another flow chart of the starter over-rotation protection control method of the preferred embodiment of the present application;

[0038] Figure 4 It is a schematic diagram of the module structure of a starter over-speed protection control system according to another embodiment of the present application. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] Reference Figure 1 The preferred embodiment of the present application provides a starter over-rotation protection control method, comprising the following contents:

[0041] Step S1: collecting the speed signal of the end of the power turbine transmission chain and the speed signal of the gas generator;

[0042] Step S2: determining whether the speed of the gas generator reaches a first preset speed;

[0043] Step S3: After the gas generator speed signal reaches the first preset speed, if the speed reduction rate of the power turbine transmission chain end is greater than the speed reduction rate threshold and the duration exceeds the preset time, or if the speed reduction amplitude of the power turbine transmission chain end exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

[0044] It can be understood that the starter over-speed protection control method of this embodiment first collects the speed signal of the power turbine transmission chain end and the speed signal of the gas generator, and then determines whether the speed of the gas generator reaches the first preset speed. If the speed of the gas generator reaches the first preset speed, it can be determined that the starter is normally ignited to start the high-power aircraft engine. At this time, if the rate of decrease of the speed at the end of the power turbine transmission chain is greater than the speed decrease rate threshold and the duration exceeds the preset time, or if the decrease amplitude of the speed at the end of the power turbine transmission chain exceeds the preset value, the parking protection is turned on. After the starter is ignited, if the rate of decrease or the amplitude of decrease of the speed at the end of the power turbine transmission chain meets the above preset conditions, it can be determined that the starter reducer input driving gear or the middle double gear is poorly meshed, causing abnormalities such as broken teeth and shaving teeth, thereby causing the power turbine power to be unable to be effectively output, so that the speed at the end of the power turbine transmission chain decreases faster than when it is normally parked, and the over-speed abnormality can be accurately determined, and the interference of the sudden abnormality of the speed data at the end of the power turbine transmission chain is effectively eliminated, and the problem of misjudgment of over-speed protection will not occur. If the gas generator speed does not reach the first preset speed, it can be determined that the starter has not been truly ignited, and the starter is undergoing test processes such as opening (oil) seal, false start, and cold operation. At this time, the power turbine will not have an over-speed problem. Even if the speed reduction rate or reduction range at the end of the power turbine transmission chain meets the above-mentioned preset conditions, the parking protection will not be activated, and the normal test will not be affected.

[0045] It can be understood that in step S1, after the starter is started, the speed n′ at the end of the power turbine transmission chain is collected in real time by the first speed sensor installed at the end of the power turbine transmission chain. p The second speed sensor collects the gas generator speed n in real time g In addition, the speed signals collected by the two speed sensors are amplified by the speed signal conditioning circuit and then input to the main control unit. The main control unit will make an over-speed abnormality judgment based on the input parameters. If it is determined that there is an over-speed abnormality, it will output a fault signal and turn on the parking protection, and save the fault information at the same time. In addition, once the parking protection is turned on, the next work can only be started after the detection equipment is manually reset and the fault is cleared.

[0046] It can be understood that in step S2, after the starter is started, if the gas generator speed n g Reaching the first preset speed means that the starter is igniting normally to start the high-power aircraft engine; if the gas generator speed n g If the first preset speed is never reached, it means that the starter has not really ignited, but is performing test runs such as unsealing, false starting, cold running, etc. The first preset speed is the switching speed, that is, the speed of the gas generator when the starter is ignited, which is driven by the starter motor to the ignition speed, generally 25000rpm.

[0047] It can be understood that in step S3, the gas generator speed signal n g After reaching the first preset speed, it is determined that the starter is igniting normally to start the aircraft engine. In this normal starting process, if the starter reducer input driving gear or the intermediate double gear meshes poorly, causing abnormalities such as broken teeth and shaving teeth, the power turbine power cannot be effectively output, causing the power turbine transmission chain end speed n′ p The descent speed is faster than that of normal parking, and the speed at the end of the power turbine transmission chain is n' p The rate of decrease is greater than the speed decrease rate threshold and the duration exceeds a preset time (e.g., 0.5s), or the speed n′ at the end of the power turbine transmission chain p If the decrease in the speed of the gas generator exceeds the preset value (e.g. 5%), it can be accurately judged that an over-speed abnormality has occurred, thereby turning on the parking protection. g The first preset speed is never reached, which means that the starter is not really ignited, but is performing test runs such as unsealing, false starting, and cold running. At this time, the power turbine will not have an overspeed problem, so even if the power turbine transmission chain end speed n' p The rate of decrease or the extent of decrease meets the above preset conditions and no parking protection measures are taken to prevent affecting the normal test run.

[0048] In addition, the inventor of the present application has analyzed a large amount of experimental data and found that the speed reduction rate threshold value will be based on the power turbine transmission chain end speed n′ p The improvement is due to the improvement of p When reaching 6000rpm, the speed reduction rate threshold is set to 600rpm / s; p When the speed reaches 30000rpm, the speed reduction rate threshold is set to 4000rpm / s; at n′ p When the speed reaches 50000rpm, the speed drop rate threshold is set to 8000rpm / s. In addition, after a large amount of test data, it is also found that after the starter stops normally, the speed signal n′ at the end of the power turbine transmission chain p The decreasing rate of n′ is as the speed decreases. p Therefore, the present invention adopts a third-order function based on the different power turbine transmission chain end speed n' p The corresponding speed drop rate threshold is used to fit the functional relationship between the two. The functional relationship can be specifically expressed as:

[0049]

[0050] in, Indicates the speed drop rate threshold, np ' ,max It represents the maximum speed of the end of the power turbine transmission chain during the starter operation. a, b, c, and d represent fitting parameters, which are obtained based on the test data fitting. For different types of starters, the fitting values ​​of a, b, c, and d are different. For example, for a certain type of starter, the fitting function relationship is:

[0051] It can be understood that the present invention obtains the power turbine transmission chain end speed n′ by fitting a large amount of test data. p The mapping relationship between the speed reduction rate threshold and the speed reduction rate threshold is established, and the third-order function can accurately reflect the changing law of the speed reduction rate threshold, realize the adaptive setting of the speed reduction rate threshold, further improve the accuracy of over-speed protection judgment, and can be applied to different models of starters, thereby improving applicability.

[0052] In addition, if Figure 2 As shown, in another embodiment of the present invention, the starter over-rotation protection control method further includes the following contents:

[0053] Step S4: After the gas generator speed reaches the second preset speed, if the speed at the end of the power turbine transmission chain exceeds the third preset speed and the increase in the speed at the end of the power turbine transmission chain exceeds the preset value, or if the speed at the end of the power turbine transmission chain exceeds the fourth preset speed, or if the speed signal at the end of the power turbine transmission chain is not detected, a protective shutdown is initiated, wherein the fourth preset speed is greater than the third preset speed.

[0054] Specifically, when the gas generator speed signal n g After reaching the second preset speed, if the starter reducer input driving gear or the intermediate double gear meshes poorly and causes abnormalities such as broken teeth or shaving teeth, the power turbine transmission chain end speed n' p On the contrary, it will increase if the speed n′ at the end of the power turbine transmission chain p If the rated speed exceeds 105% and the increase exceeds 10% of the current speed, the protection stop is activated. p If the rated speed exceeds 110%, the protection stop is also activated. In addition, if the power turbine transmission chain end speed signal n' is not detected p , which means that the power turbine transmission chain is completely damaged and the power turbine cannot output power at all, then the protection stop is activated. Among them, the second preset speed is the disengagement speed, that is, from the actual ignition, the starter motor and the turbine rotor jointly increase the engine rotor speed to the starter motor disengagement speed, which is generally 55000rpm. Among them, n gWhen the speed accelerates from 0 to 25000rpm, the starter has not yet ignited, and the gas turbine rotor is driven entirely by the starter motor. The speed of the power turbine has not yet increased, so the power is limited when an abnormality occurs. p will decrease; and when the starter is actually ignited and n g When the speed reaches 55000rpm, the starter motor will be disengaged and the turbine rotor will start to provide power alone. When an abnormality occurs, the power load suddenly decreases, so n' p Instead, it increased.

[0055] In addition, if Figure 3 As shown, in another embodiment of the present invention, the starter over-rotation protection control method further includes the following contents:

[0056] Step S5: collecting the vibration signal of the reducer casing, comparing the vibration value of the reducer casing with the vibration threshold, and if the vibration value of the reducer casing is greater than the vibration threshold, starting the parking protection.

[0057] It can be understood that during the operation of the starter, if the starter reducer input active gear or the intermediate double gear meshes poorly and causes abnormalities such as broken teeth and shaved teeth, the vibration value of the local starter reducer will increase significantly. Therefore, if the vertical vibration value of the reducer casing is detected to exceed the vibration threshold, the parking protection is turned on, thereby further improving the accuracy and reliability of the over-speed protection judgment. Specifically, the vibration signal of the reducer casing is collected by the vibration sensor deployed on the reducer casing, and the vibration signal is input to the main control unit after filtering and amplification. The main control unit will analyze the input vibration signal to obtain the vertical vibration value and compare it with the vibration threshold. If the vertical vibration value of the reducer casing is greater than the vibration threshold, the parking protection is turned on.

[0058] Optionally, the collected vibration signals of the reducer casing include low-frequency vibration signals (e.g., 20 Hz to 50 Hz) and high-frequency vibration signals (e.g., 400 Hz to 1100 Hz), so that low-frequency vibration monitoring and high-frequency vibration monitoring can be realized. In addition, for vibration signals of different frequency bands, the corresponding vibration thresholds are different, for example, the vibration threshold corresponding to the low frequency band is 80 mm / s, and the vibration threshold corresponding to the high frequency band is 45 mm / s.

[0059] It can be understood that the inventor of the present application has obtained through a large amount of experimental data that as the n′ at which the super-rotation abnormality occurs p The vertical vibration value will be different at different speeds. The higher the starting speed, the more the vibration will increase monotonically. Therefore, the inventors of this application use exponential functions to fit the vibration threshold and n′ based on different starting speeds and corresponding vibration values. p The functional relationship between them can be specifically expressed as:

[0060] δ=en′ p f

[0061] Where δ represents the vibration threshold, n′ p represents the speed at the end of the power turbine transmission chain, e and f represent fitting parameters, which are obtained based on the test data fitting. For different types of starters, the fitting values ​​of e and f are different. For example, for a certain type of starter, the fitting function relationship of its low frequency band is: δ = 0.3314n' p 0.5022 , the fitting function relationship of the high frequency band is: δ=0.0016n′ p 0.9474 .

[0062] It can be understood that the present invention obtains the mapping relationship between different starting speeds and vibration thresholds by fitting a large amount of test data, and uses an exponential function to accurately reflect the changing law of the vibration threshold, thereby realizing the adaptive setting of the vibration threshold, further improving the accuracy of over-speed protection judgment, and can be applied to different models of starters, thereby improving applicability.

[0063] Optionally, the step S5 further includes the following contents:

[0064] Determine whether the duration of the vibration exceeding the limit exceeds the preset time. If it exceeds the preset time, calculate the rising rate of the vibration amount per unit time of the vibration exceeding the limit, and compare the rising rate with the vibration rising rate threshold. If it is greater than the vibration rising rate threshold, start the parking protection.

[0065] Specifically, it is determined whether the duration of the vibration exceeding the limit exceeds 100ms. If it exceeds 100ms, the rising rate of the vibration amount in the unit time of the vibration exceeding the limit is calculated, and the rising rate is compared with the vibration rising rate threshold. If it is greater than the vibration rising rate threshold, the parking protection is turned on. The vibration rising rate threshold is calculated based on the following formula:

[0066] Δδ + =gln(n′ p )+h

[0067] Among them, Δδ + represents the vibration rise rate threshold, n′ p It represents the speed at the end of the power turbine transmission chain. g and h represent the fitting parameters, which are obtained based on the test data fitting. For different models of starters, the fitting values ​​of g and h are different.

[0068] It can be understood that this functional relationship is also obtained based on the fitting of a large amount of test data, and taking into account that the rising rate of the vibration amount in unit time when the vibration exceeds the limit shows a trend of first fast and then slow, a logarithmic function is used for fitting, which can better reflect the changing law of the vibration rise rate threshold, realize the adaptive setting of the vibration rise rate threshold, further improve the accuracy of the over-speed protection judgment, and can be applied to different models of starters, thereby improving applicability.

[0069] In addition, if Figure 4 As shown, another embodiment of the present invention further provides a starter over-rotation protection control system, preferably using the starter over-rotation protection control method as described above, including:

[0070] The first speed acquisition module is used to acquire the speed signal at the end of the power turbine transmission chain;

[0071] The second speed acquisition module is used to acquire the speed signal of the gas generator;

[0072] The parking protection control module is used to determine whether the gas generator speed reaches a first preset speed, and after the gas generator speed signal reaches the first preset speed, if the speed reduction rate of the power turbine transmission chain end is greater than the speed reduction rate threshold and the duration exceeds the preset time, or if the speed reduction amplitude of the power turbine transmission chain end exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

[0073] It can be understood that the starter over-speed protection control system of this embodiment first collects the speed signal of the power turbine transmission chain end and the speed signal of the gas generator, and then determines whether the speed of the gas generator reaches the first preset speed. If the speed of the gas generator reaches the first preset speed, it can be determined that the starter is in the process of normal ignition and starting the high-power aircraft engine. At this time, if the speed drop rate of the power turbine transmission chain end is greater than the speed drop rate threshold and the duration exceeds the preset time, or if the speed drop amplitude of the power turbine transmission chain end exceeds the preset value, the parking protection is turned on. After the starter is ignited, if the speed drop rate or drop amplitude of the power turbine transmission chain end meets the above preset conditions, it can be determined that the starter reducer input driving gear or the middle double gear is poorly meshed, causing abnormalities such as broken teeth and shaving teeth, thereby causing the power turbine power to be unable to be effectively output, so that the speed drop rate of the power turbine transmission chain end is faster than that of normal parking, and the over-speed abnormality can be accurately determined, and the interference of sudden abnormal speed data is effectively eliminated, and the problem of misjudgment of over-speed protection will not occur. If the gas generator speed does not reach the first preset speed, it can be determined that the starter has not been truly ignited, and the starter is undergoing test processes such as opening (oil) seal, false start, and cold operation. At this time, the power turbine will not have an over-speed problem. Even if the speed reduction rate or reduction range at the end of the power turbine transmission chain meets the above-mentioned preset conditions, the parking protection will not be activated, and the normal test will not be affected.

[0074] In addition, the parking protection control module is also used to start a protective parking after the gas generator speed reaches the second preset speed, if the speed at the end of the power turbine transmission chain exceeds the third preset speed and the increase in the speed at the end of the power turbine transmission chain exceeds the preset value, or if the speed at the end of the power turbine transmission chain exceeds the fourth preset speed, or if the speed signal at the end of the power turbine transmission chain is not detected, wherein the fourth preset speed is greater than the third preset speed.

[0075] In addition, the starter overspeed protection control system also includes a vibration signal acquisition module for collecting the vibration signal of the reducer casing. The parking protection control module is also used to compare the vibration value of the reducer casing with the vibration threshold. If the vibration value of the reducer casing is greater than the vibration threshold, the parking protection is turned on.

[0076] It can be understood that each module of the system embodiment corresponds to each step of the above method embodiment, so the working principle of each module will not be repeated here, and the corresponding reference is made to the above method embodiment.

[0077] In addition, another embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores a computer program, and the processor executes the steps of the above method by calling the computer program stored in the memory.

[0078] In addition, another embodiment of the present invention further provides a computer-readable storage medium for storing a computer program for performing starter over-rotation protection control, wherein the computer program executes the steps of the method described above when running on a computer.

[0079] The general form of computer readable storage media includes: floppy disk, flexible disk, hard disk, magnetic tape, any other magnetic medium, CD-ROM, any other optical medium, punch cards, paper tape, any other physical medium with a pattern of holes, random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), flash erasable programmable read-only memory (FLASH-EPROM), any other memory chip or cartridge, or any other medium that can be read by a computer. The instructions can further be transmitted or received by a transmission medium. The term transmission medium can include any tangible or intangible medium that can be used to store, encode or carry instructions for execution by a machine, and includes digital or analog communication signals or other intangible media that facilitate the communication of the above instructions. Transmission media include coaxial cables, copper wires and optical fibers, which include the wires of a bus used to transmit a computer data signal.

[0080] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0081] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0082] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0083] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0084] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A starter over-rotation protection control method, characterized in that: Includes the following: Collect the speed signal of the end of the power turbine transmission chain and the speed signal of the gas generator; Determining whether the speed of the gas generator reaches a first preset speed; After the gas generator speed signal reaches the first preset speed, if the speed decrease rate at the end of the power turbine transmission chain is greater than the speed decrease rate threshold and the duration exceeds the preset time, or if the speed decrease amplitude at the end of the power turbine transmission chain exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

2. The starter over-rotation protection control method according to claim 1, characterized in that: The speed drop rate threshold is calculated based on the following formula: in, Indicates the speed drop rate threshold, n p ' ,max It represents the maximum speed of the end of the power turbine transmission chain during the starter operation, and a, b, c, and d represent the fitting parameters.

3. The starter over-rotation protection control method according to claim 1, characterized in that: Also included are the following: After the gas generator speed reaches the second preset speed, if the speed at the end of the power turbine transmission chain exceeds the third preset speed and the increase in the speed at the end of the power turbine transmission chain exceeds the preset value, or if the speed at the end of the power turbine transmission chain exceeds the fourth preset speed, or if the speed signal at the end of the power turbine transmission chain is not detected, the protection shutdown is initiated, wherein the fourth preset speed is greater than the third preset speed.

4. The starter over-rotation protection control method according to claim 1, characterized in that: Also included are the following: The vibration signal of the reducer casing is collected, and the vibration value of the reducer casing is compared with the vibration threshold. If the vibration value of the reducer casing is greater than the vibration threshold, the parking protection is turned on.

5. The starter over-rotation protection control method according to claim 4, characterized in that: The vibration threshold is calculated based on the following formula: Where δ represents the vibration threshold, n′ p represents the speed at the end of the power turbine transmission chain, and e and f represent the fitting parameters.

6. The starter over-rotation protection control method according to claim 4, characterized in that: Also included are the following: Determine whether the duration of the vibration exceeding the limit exceeds the preset time. If it exceeds the preset time, calculate the rising rate of the vibration amount per unit time of the vibration exceeding the limit, and compare the rising rate with the vibration rising rate threshold. If it is greater than the vibration rising rate threshold, start the parking protection.

7. The starter over-rotation protection control method according to claim 6, characterized in that: The vibration rise rate threshold is calculated based on the following formula: Dd + =gln(n′ p )+h Among them, Δδ + represents the vibration rise rate threshold, n′ p represents the speed at the end of the power turbine transmission chain, and g and h represent the fitting parameters.

8. A starter over-rotation protection control system, characterized in that: include: The first speed acquisition module is used to acquire the speed signal at the end of the power turbine transmission chain; The second speed acquisition module is used to acquire the speed signal of the gas generator; The parking protection control module is used to determine whether the gas generator speed reaches a first preset speed, and after the gas generator speed signal reaches the first preset speed, if the speed reduction rate of the power turbine transmission chain end is greater than the speed reduction rate threshold and the duration exceeds the preset time, or if the speed reduction amplitude of the power turbine transmission chain end exceeds the preset value, the parking protection is turned on; if the gas generator speed signal does not reach the first preset speed, the parking protection is not turned on.

9. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program, and the processor executes the steps of the method according to any one of claims 1 to 7 by calling the computer program stored in the memory.

10. A computer-readable storage medium for storing a computer program for starter over-rotation protection control, characterized in that: When the computer program is run on a computer, the steps of the method according to any one of claims 1 to 7 are executed.

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