Adaptive variable geometry stabilizer control method, device and apparatus

Abstract

This application relates to an adaptive variable geometry stabilizer control method, apparatus, and device. It involves acquiring the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine; determining the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature, and pressure; determining the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and the minimum opening angle of the variable cycle engine; and controlling the drive mechanism of the variable geometry stabilizer to adjust its opening angle to the target opening angle. In this embodiment, by calculating the minimum opening angle required to maintain combustion in real time based on airflow velocity, temperature, and pressure, it ensures that, under any operating condition, the recirculation zone size always meets the residence time requirements of the air-fuel mixture from a physical mechanism perspective. This avoids the risk of afterburner ignition failure or lean-fuel flameout due to blindly reducing resistance, while minimizing flow resistance and reducing fuel consumption.

Description

Technical Field

[0001] This application relates to the field of aerospace technology, and in particular to an adaptive variable geometry stabilizer control method, device and equipment. Background Technology

[0002] With advancements in aviation technology, variable cycle engines (VCEs) have become the core powerplant for next-generation aircraft due to their ability to balance subsonic cruise economy with supersonic thrust performance. VCEs switch between low-bypass-ratio and high-bypass-ratio modes by changing the bypass ratio (BPR). The high-bypass-ratio mode handles conventional missions such as subsonic cruise and partial afterburner boost, while the low-bypass-ratio mode handles extreme missions such as supersonic penetration and dogfighting.

[0003] The core advantage of high-bypass turbofan engines is fuel efficiency, but their thrust output is relatively mild, only meeting the basic requirements of conventional subsonic cruise. Variable cycle engines, in actual operation, need to handle unexpected scenarios such as emergency climbs, subsonic acceleration, and obstacle avoidance, requiring short-term, rapid thrust replenishment. Partial afterburner, through staged fuel injection and moderate combustion, can rapidly increase thrust in high-bypass turbofan mode (thrust falling between that of non-afterburner and full afterburner), precisely compensating for thrust shortfalls.

[0004] However, in the current high bypass ratio mode and under partial afterburner conditions, the opening angle of the variable geometry stabilizer in the variable cycle engine is usually set to the fully open state, which results in excessive loss of flow resistance and increased fuel consumption. Summary of the Invention

[0005] Therefore, it is necessary to provide an adaptive variable geometry stabilizer control method, device, and equipment that can reduce fuel consumption to address the aforementioned technical problems.

[0006] In a first aspect, this application provides an adaptive variable geometry stabilizer control method, including:

[0007] Obtain the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine;

[0008] The minimum opening angle of the variable geometry stabilizer in the afterburner is determined based on the airflow velocity, temperature, and pressure.

[0009] The target opening angle of the variable geometry stabilizer is determined based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle.

[0010] The drive mechanism of the variable geometry stabilizer is controlled to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

[0011] In one embodiment, determining the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature, and pressure includes:

[0012] The result of the first product of the gas flow velocity and the chemical reaction time coefficient of the oil-gas mixture is determined;

[0013] Determine the preset constant value, the length of one arm of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the second product result of the pressure raised to the nth power; where n is the preset pressure index.

[0014] The minimum opening angle is determined based on the first product result, the second product result, and the temperature.

[0015] In one embodiment, determining the minimum opening angle based on the first product result, the second product result, and the temperature includes:

[0016] Determine the third product result of the second product and the exponential decay value; the exponential decay value is the ratio of a negative preset activation energy to a target parameter with the natural constant as the base; the target parameter is the product of the gas constant and the temperature.

[0017] Determine the quotient of the first product result and the third product result;

[0018] The minimum opening angle is determined based on the product of the arcsine of the quotient and the preset constant value.

[0019] In one embodiment, determining the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle includes:

[0020] The initial opening angle of the variable geometry stabilizer is determined based on the preset bypass ratio mode and the minimum opening angle.

[0021] Obtain the pressure pulsation value of the afterburner during the bypass ratio mode switching process;

[0022] The target opening angle is determined based on the initial opening angle and the pressure pulsation value.

[0023] In one embodiment, determining the initial opening angle of the variable geometry stabilizer based on the preset bypass ratio pattern and the minimum opening angle includes:

[0024] When the preset bypass ratio mode is a high bypass ratio mode and the afterburner is in a partially afterburner state, the sum of the minimum opening angle and the preset safety margin angle is determined as the initial opening angle.

[0025] In one embodiment, determining the target opening angle based on the initial opening angle and the pressure pulsation value includes:

[0026] When the pressure pulsation value is greater than a preset threshold, the correction angle is determined by multiplying the bypass ratio change rate during the bypass ratio mode switching process with a preset correction gain coefficient.

[0027] The target opening angle is determined based on the sum of the initial opening angle and the correction angle.

[0028] Secondly, this application also provides an adaptive variable geometry stabilizer control device, comprising:

[0029] The acquisition module is used to acquire the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine;

[0030] The first determining module is used to determine the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature and pressure.

[0031] The second determining module is used to determine the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle.

[0032] The control module is used to control the drive mechanism of the variable geometry stabilizer to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

[0033] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method steps provided in the first aspect.

[0034] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method steps provided in the first aspect.

[0035] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method steps provided in the first aspect.

[0036] The aforementioned adaptive variable geometry stabilizer control method, device, and equipment acquire the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine; determine the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature, and pressure; determine the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and minimum opening angle of the variable cycle engine; and control the drive mechanism of the variable geometry stabilizer to adjust the opening angle of the variable geometry stabilizer to the target opening angle. In this embodiment, by calculating the minimum opening angle required to maintain combustion in real time based on airflow velocity, temperature, and pressure, it ensures that under any operating condition (especially the edge condition of low pressure and high flow velocity), the size of the recirculation zone always meets the residence time requirements of the oil-air mixture from a physical mechanism perspective. This avoids the risk of afterburner ignition failure or lean-burner flameout due to blindly reducing resistance, while minimizing flow resistance and reducing fuel consumption. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A diagram illustrating the application environment of the adaptive variable geometry stabilizer control method in one embodiment;

[0039] Figure 2 This is a flowchart illustrating an adaptive variable geometry stabilizer control method in one embodiment;

[0040] Figure 3 This is a flowchart illustrating a method for determining the minimum opening angle in one embodiment;

[0041] Figure 4 This is a flowchart illustrating a method for determining the target opening angle in one embodiment;

[0042] Figure 5 This is a flowchart illustrating the method for determining the target opening angle in another embodiment;

[0043] Figure 6 This is a structural block diagram of an adaptive variable geometry stabilizer control device in one embodiment;

[0044] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0046] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the embodiments, or any combination of multiple embodiments.

[0047] The adaptive variable geometry stabilizer control method provided in this application embodiment can be applied to, for example... Figure 1 In the illustrated application environment, the environment includes a variable cycle engine, which comprises a controller 100 and an afterburner. A turbine rear support 300 is located at the front end of the afterburner, and a variable geometry stabilizer 400 is located downstream of the turbine rear support 300. The afterburner also includes a drive mechanism 200 for the variable geometry stabilizer 400. After acquiring the airflow velocity, temperature, and pressure at the inlet of the afterburner in the variable cycle engine, the controller 100 determines the target opening angle of the variable geometry stabilizer 400 based on the airflow velocity, temperature, and pressure, and adjusts the opening angle of the variable geometry stabilizer 400 to the target opening angle by controlling the drive mechanism 200.

[0048] In one exemplary embodiment, such as Figure 2 As shown, an adaptive variable geometry stabilizer control method is provided, which is applied to... Figure 1 The controller in the example is used for illustration, including the following steps S201 to S204. Wherein:

[0049] S201 acquires the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine.

[0050] In this embodiment, sensors can be arranged at the inlet of the afterburner to acquire the airflow velocity, temperature, and pressure (total pressure) at the afterburner inlet. For example, pressure and static pressure signals are collected by multiple total pressure probes and static pressure holes arranged at the inlet cross-section of the afterburner, and the total pressure and static pressure at the afterburner inlet are obtained after circumferential averaging. Temperature probes arranged at the inlet cross-section of the afterburner are used to collect airflow temperature signals, and the temperature at the afterburner inlet is obtained after multi-point averaging. Based on the total pressure, static pressure, and temperature at the afterburner inlet, and combined with the gas state equation and compressible flow relations, the airflow velocity at the afterburner inlet is calculated.

[0051] S202 determines the minimum opening angle of the variable geometry stabilizer in the afterburner based on airflow velocity, temperature, and pressure.

[0052] In this embodiment, a first product of the gas flow velocity and the chemical reaction time coefficient of the oil-gas mixture can be determined, as well as a second product of a preset constant value, the length of one arm of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the pressure to the power of n. Based on the first product, the second product, and the temperature, the minimum opening angle is determined, where n is a preset pressure index.

[0053] In another possible implementation, the minimum opening angle can be pre-established through simulation to map the relationship between the minimum opening angle and different operating conditions (different airflow speeds, temperatures, and pressures), and the current airflow speed, temperature, and pressure can be obtained in real time. The minimum opening angle of the variable geometry stabilizer can then be determined through the mapping relationship.

[0054] S203 determines the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and minimum opening angle of the variable cycle engine.

[0055] In this embodiment, the initial opening angle of the variable geometry stabilizer can be determined based on the preset bypass ratio mode and the minimum opening angle. If the bypass ratio mode is to be switched, the pressure pulsation value of the afterburner during the bypass ratio mode switching process is obtained, and the target opening angle is determined based on the initial opening angle and the pressure pulsation value.

[0056] In one possible implementation, the initial opening angle of the variable geometry stabilizer can be determined based on a preset bypass ratio mode and a minimum opening angle. If the bypass ratio mode is not involved, the initial opening angle is determined as the target opening angle.

[0057] S204, control the drive mechanism of the variable geometry stabilizer to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

[0058] In this embodiment, the controller controls the drive mechanism of the variable geometry stabilizer, and uses the drive mechanism to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

[0059] Optionally, the drive mechanism of the variable geometry stabilizer can be an electric servo mechanism, a pneumatic proportional servo mechanism, a piezoelectric ceramic actuator, a magnetostrictive actuator, etc.

[0060] In the aforementioned adaptive variable geometry stabilizer control method, the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine are acquired; based on the airflow velocity, temperature, and pressure, the minimum opening angle of the variable geometry stabilizer in the afterburner is determined; based on the preset bypass ratio mode and the minimum opening angle of the variable cycle engine, the target opening angle of the variable geometry stabilizer is determined; and the drive mechanism of the variable geometry stabilizer is controlled to adjust the opening angle of the variable geometry stabilizer to the target opening angle. In this embodiment, by calculating the minimum opening angle required to maintain combustion in real time based on airflow velocity, temperature, and pressure, it ensures that under any operating condition (especially the edge condition of low pressure and high flow velocity), the size of the recirculation zone always meets the residence time requirements of the air-fuel mixture from a physical mechanism perspective. This avoids the risk of afterburner ignition failure or lean-fuel flameout caused by blindly reducing resistance, while minimizing flow resistance and reducing fuel consumption.

[0061] Figure 3 This is a flowchart illustrating a method for determining the minimum opening angle in one embodiment, as shown below. Figure 3 As shown, this application embodiment relates to a possible implementation of how to determine the minimum opening angle of a variable geometry stabilizer in an afterburner based on airflow velocity, temperature, and pressure, including the following steps:

[0062] S301, the first product result of determining the gas flow velocity and the chemical reaction time coefficient of the oil-gas mixture.

[0063] S302, determine the preset constant value, the length of one arm of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the second product result of the pressure to the power of n; n is the preset pressure index.

[0064] Among them, the chemical reaction time coefficient of the oil-gas mixture, the length coefficient of the reflux zone of the variable geometry stabilizer, and the preset pressure index can all be obtained through experimental calibration.

[0065] S303, determine the minimum opening angle based on the first product result, the second product result, and the temperature.

[0066] In this embodiment, the second product result and the third product result of the exponential decay value can also be determined, and the quotient of the first product result and the third product result can be determined; the minimum opening angle is determined based on the product of the arcsine value of the quotient and the preset constant value. Here, the exponential decay value is the ratio of the preset activation energy (base of the natural constant) to the target parameter, with the exponent being the natural constant; the target parameter is the product of the gas constant and the temperature.

[0067] In one possible implementation, the first product result and the fourth product result with a negative exponential decay value can be obtained, the quotient of the fourth product result and the second product result can be determined, and the minimum opening angle can be determined based on the product of the arcsine value of the quotient and the preset constant value.

[0068] Specifically, the minimum opening angle is determined based on the first product result, the second product result, and the temperature, including: determining the second product result and the third product result of the exponential decay value; the exponential decay value is the value of the ratio of the preset activation energy with the natural constant as the base and the target parameter as the exponent; the target parameter is the product of the gas constant and the temperature; determining the quotient of the first product result and the third product result; and determining the minimum opening angle based on the product of the arcsine value of the quotient and the preset constant value.

[0069] In this embodiment, it is assumed that the length of one arm of the variable geometry stabilizer is L, and the current opening angle is α (0≤α≤α). max The physical projection width (characteristic dimension) D of the variable geometry stabilizer. s for:

[0070]

[0071] The resulting geometric blockage ratio for:

[0072]

[0073] Where N is the number of variable geometry stabilizer struts, H duct For the flow channel height, A total This refers to the cross-sectional area of ​​the afterburner inlet.

[0074] The core principle of flame stability is the residence time (τ) of the oil-gas mixture. res The reaction time must be greater than the chemical reaction time (τ) of the oil and gas mixture. chem Based on the Damköhler number (Da) criterion, the following flame stabilization constraint inequalities are established in the embodiments of this application:

[0075]

[0076] in The airflow velocity at the inlet of the afterburner. This is the reflux zone length factor (typically ranging from 2.0 to 3.0). Chemical reaction time. The pressure P and temperature T at the inlet of the afterburner are related and can be approximated as:

[0077]

[0078] Where R is the gas constant. Let E be the chemical reaction time coefficient and E be the preset activation energy. By combining the above formulas, the minimum characteristic width required to maintain combustion can be solved. :

[0079]

[0080] This leads to the minimum opening angle. The calculation formula is as follows:

[0081]

[0082] In this embodiment, the first product of the gas flow velocity and the chemical reaction time coefficient of the gas-oil mixture is determined; the second product of the preset constant value, the single-side arm length of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the nth power of the pressure is determined; the third product of the second product and the exponential decay value is determined; and the quotient of the first product and the third product is determined. Based on the product of the arcsine of the quotient and the preset constant value, the minimum opening angle is determined. This embodiment introduces a method based on the Damköhler number criterion to calculate the minimum opening angle required to maintain combustion in real time, avoiding the risk of afterburner ignition failure or lean flameout caused by blindly reducing resistance, while minimizing flow resistance.

[0083] Figure 4 This is a flowchart illustrating a method for determining the target opening angle in one embodiment, as shown below. Figure 4 As shown, this application embodiment relates to a possible implementation of how to determine the target opening angle of a variable geometry stabilizer based on the preset bypass ratio mode and minimum opening angle of a variable cycle engine, including the following steps:

[0084] S401 determines the initial opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and minimum opening angle.

[0085] The preset bypass ratio mode includes a low bypass ratio mode and a high bypass ratio mode. In this embodiment, if the preset bypass ratio mode is a low bypass ratio mode and the afterburner is in an afterburner state, the initial opening angle of the variable geometry stabilizer is determined to be the maximum opening angle of the variable geometry stabilizer, so as to construct a strong recirculation zone and ensure combustion efficiency under a high fuel-air ratio.

[0086] If the preset bypass ratio mode is high bypass ratio mode and the afterburner is in a non-afterburning state, the initial opening angle of the variable geometry stabilizer is determined to be 0 degrees. When the variable cycle engine is in high bypass ratio mode and in a non-afterburning state, the variable geometry stabilizer angle can be closed to the minimum or even completely closed (0 degrees), which significantly reduces the aerodynamic drag (total pressure loss) in the afterburner, thereby effectively improving the engine's fuel economy during cruise.

[0087] If the preset bypass ratio mode is the high bypass ratio mode and the afterburner is in a partially afterburner state, the initial opening angle is further determined based on the minimum opening angle and the preset safety margin angle.

[0088] Furthermore, based on the preset bypass ratio mode and the minimum opening angle, the initial opening angle of the variable geometry stabilizer is determined, including: when the preset bypass ratio mode is the high bypass ratio mode and the afterburner is in a partially afterburner state, the sum of the minimum opening angle and the preset safety margin angle is determined as the initial opening angle.

[0089] The preset safety margin angle can be different or the same for different levels of boost. In this embodiment, in the case of high bypass ratio mode and partial boost, a safety margin angle is introduced to ensure that the initial opening angle of the variable geometry stabilizer is always higher than the actual critical flame stabilization angle. This minimizes the flow channel blockage ratio while ensuring flame stabilization, avoiding combustion instability, pressure pulsation exceeding limits, or flameout due to instantaneous disturbances. This achieves the best match between aerodynamic and combustion performance, and improves the robustness and reliability of the combustion system during mode switching.

[0090] S402, acquire the pressure pulsation value of the afterburner during the bypass ratio mode switching process.

[0091] In this embodiment, multiple high-frequency dynamic pressure sensors can be arranged circumferentially inside the afterburner to collect dynamic pressure signals during the bypass ratio mode switching process in real time. The collected dynamic pressure signals are detrended to separate the high-frequency pulsating pressure components. The root mean square value or peak-to-peak value of the pressure pulsation is calculated based on the high-frequency pulsating pressure components and used as the current pressure pulsation value.

[0092] Bypass ratio mode switching can be from a high bypass ratio mode to a low bypass ratio mode, or vice versa. For example, the bypass ratio changes continuously and dynamically from the original mode range (e.g., high bypass ratio ≥ 3~5) to the target mode range (e.g., low bypass ratio ≤ 1~2).

[0093] S403, determine the target opening angle based on the initial opening angle and pressure pulsation value.

[0094] In this embodiment, the target opening angle is determined based on the relationship between the pressure pulsation value and a preset threshold. If the pressure pulsation value is greater than the preset threshold, a correction angle is determined, and the initial opening angle is corrected based on the correction angle. If the pressure pulsation value is not greater than the preset threshold, the initial opening angle is determined as the target opening angle.

[0095] In this embodiment, the initial opening angle of the variable geometry stabilizer is determined based on a preset bypass ratio mode and a minimum opening angle. The pressure pulsation value of the afterburner during bypass ratio mode switching is obtained. Based on the initial opening angle and the pressure pulsation value, the target opening angle is determined. In the transition state between high and low bypass ratio modes in the variable cycle engine, this embodiment utilizes pressure pulsation value feedback to feedforward compensate the opening angle of the variable geometry stabilizer. This effectively suppresses combustion oscillations that may be caused by sudden changes in the flow field, ensuring the smoothness of the variable cycle engine's thrust output and operational safety.

[0096] Figure 5 This is a flowchart illustrating the method for determining the target opening angle in another embodiment, as shown below. Figure 5 As shown, this application embodiment relates to a possible implementation of how to determine the target opening angle based on the initial opening angle and the pressure pulsation value, including the following steps:

[0097] S501, when the pressure pulsation value is greater than the preset threshold, the correction angle is determined by multiplying the bypass ratio change rate during the bypass ratio mode switching process with the preset correction gain coefficient.

[0098] S502, determine the target opening angle based on the sum of the initial opening angle and the correction angle.

[0099] In this embodiment of the application, if the pressure pulsation value is greater than a preset threshold, it indicates that the combustion is on the edge of instability, and the opening angle of the variable geometry stabilizer needs to be increased immediately until the pressure pulsation value returns to normal.

[0100]

[0101] in, The preset correction gain coefficient is used, and BPR is the bypass ratio during the bypass ratio mode switching process.

[0102] In this embodiment, when the pressure pulsation value exceeds a preset threshold, the correction angle is determined by multiplying the bypass ratio change rate during the bypass ratio mode switching process by a preset correction gain coefficient. The target opening angle is determined by summing the initial opening angle and the correction angle. In this embodiment, when the pressure pulsation value exceeds the preset threshold, the correction angle is determined by multiplying the bypass ratio change rate by a preset correction gain coefficient. The correction amplitude can be automatically adjusted according to the switching speed and the strength of the disturbance, avoiding both combustion instability due to insufficient correction and unnecessary increase in aerodynamic drag due to a fixed, excessively large correction, thus achieving a dynamic balance between combustion stability and fuel economy. Furthermore, this method can compensate for flow field distortion, measurement errors, and control loop lag during mode switching. Especially under edge conditions such as low pressure and high flow velocity, it can still ensure that the recirculation zone size meets the residence time requirements of the fuel-air mixture, fundamentally avoiding the risk of afterburner ignition failure or lean-burn flameout.

[0103] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0104] Based on the same inventive concept, this application also provides an adaptive variable geometry stabilizer control device for implementing the adaptive variable geometry stabilizer control method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more embodiments of the adaptive variable geometry stabilizer control device provided below can be found in the limitations of the adaptive variable geometry stabilizer control method described above, and will not be repeated here.

[0105] In one exemplary embodiment, such as Figure 6 As shown, an adaptive variable geometry stabilizer control device is provided, comprising: an acquisition module 11, a first determination module 12, a second determination module 13, and a control module 14, wherein:

[0106] The acquisition module 11 is used to acquire the airflow velocity, temperature and pressure at the inlet of the afterburner in the variable cycle engine;

[0107] The first determining module 12 is used to determine the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature and pressure;

[0108] The second determining module 13 is used to determine the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and minimum opening angle of the variable cycle engine.

[0109] The control module 14 is used to control the drive mechanism of the variable geometry stabilizer to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

[0110] In an exemplary embodiment, the first determining module 12 is specifically used to determine the first product result of the gas flow velocity and the chemical reaction time coefficient of the oil-gas mixture; determine the second product result of the preset constant value, the single-arm length of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the pressure to the power of n; where n is the preset pressure index; and determine the minimum opening angle based on the first product result, the second product result, and the temperature.

[0111] In an exemplary embodiment, the first determining module 12 is specifically used to determine the second product result and the third product result of the exponential decay value; the exponential decay value is the value of the ratio of the negative preset activation energy to the target parameter with the natural constant as the base; the target parameter is the product of the gas constant and the temperature; the quotient of the first product result and the third product result is determined; and the minimum opening angle is determined based on the product result of the arcsine value of the quotient and the preset constant value.

[0112] In an exemplary embodiment, the second determining module 13 is specifically used to determine the initial opening angle of the variable geometry stabilizer based on a preset bypass ratio mode and a minimum opening angle; to obtain the pressure pulsation value of the afterburner during the bypass ratio mode switching process; and to determine the target opening angle based on the initial opening angle and the pressure pulsation value.

[0113] In an exemplary embodiment, the second determining module 13 is specifically used to determine the sum of the minimum opening angle and the preset safety margin angle as the initial opening angle when the preset bypass ratio mode is the high bypass ratio mode and the afterburner is in a partially afterburner state.

[0114] In an exemplary embodiment, the second determining module 13 is specifically used to determine the correction angle based on the product of the bypass ratio change rate during the bypass ratio mode switching process and the preset correction gain coefficient when the pressure pulsation value is greater than a preset threshold; and to determine the target opening angle based on the sum of the initial opening angle and the correction angle.

[0115] Each module in the aforementioned adaptive variable geometry stabilizer control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0116] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 7 As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores relevant data for variable geometry stabilizer control. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements an adaptive variable geometry stabilizer control method.

[0117] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0118] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of any of the above method embodiments.

[0119] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above method embodiments.

[0120] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the above method embodiments.

[0121] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0122] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0123] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0124] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. An adaptive variable geometry stabilizer control method, characterized in that, The method includes: Obtain the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine; The minimum opening angle of the variable geometry stabilizer in the afterburner is determined based on the airflow velocity, temperature, and pressure. The target opening angle of the variable geometry stabilizer is determined based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle. The drive mechanism of the variable geometry stabilizer is controlled to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

2. The method according to claim 1, characterized in that, Determining the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature, and pressure includes: The result of the first product of the gas flow velocity and the chemical reaction time coefficient of the oil-gas mixture is determined; Determine the preset constant value, the length of one arm of the variable geometry stabilizer, the length coefficient of the recirculation zone of the variable geometry stabilizer, and the second product result of the pressure raised to the nth power; where n is the preset pressure index; The minimum opening angle is determined based on the first product result, the second product result, and the temperature.

3. The method according to claim 2, characterized in that, Determining the minimum opening angle based on the first product result, the second product result, and the temperature includes: Determine the third product result of the second product result and the exponential decay value; the exponential decay value is the ratio of the preset activation energy with the natural constant as the base and the target parameter as the exponent; the target parameter is the product of the gas constant and the temperature; Determine the quotient of the first product result and the third product result; The minimum opening angle is determined based on the product of the arcsine of the quotient and the preset constant value.

4. The method according to claim 1, characterized in that, Determining the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle includes: The initial opening angle of the variable geometry stabilizer is determined based on the preset bypass ratio mode and the minimum opening angle. Obtain the pressure pulsation value of the afterburner during the bypass ratio mode switching process; The target opening angle is determined based on the initial opening angle and the pressure pulsation value.

5. The method according to claim 4, characterized in that, Determining the initial opening angle of the variable geometry stabilizer based on the preset bypass ratio mode and the minimum opening angle includes: When the preset bypass ratio mode is the high bypass ratio mode and the afterburner is in a partially afterburner state, the sum of the minimum opening angle and the preset safety margin angle is determined as the initial opening angle.

6. The method according to claim 4, characterized in that, Determining the target opening angle based on the initial opening angle and the pressure pulsation value includes: When the pressure pulsation value is greater than a preset threshold, the correction angle is determined by multiplying the bypass ratio change rate during the bypass ratio mode switching process with a preset correction gain coefficient. The target opening angle is determined based on the sum of the initial opening angle and the correction angle.

7. An adaptive variable geometry stabilizer control device, characterized in that, The device includes: The acquisition module is used to acquire the airflow velocity, temperature, and pressure at the inlet of the afterburner in a variable cycle engine; The first determining module is used to determine the minimum opening angle of the variable geometry stabilizer in the afterburner based on the airflow velocity, temperature and pressure. The second determining module is used to determine the target opening angle of the variable geometry stabilizer based on the preset bypass ratio mode of the variable cycle engine and the minimum opening angle. The control module is used to control the drive mechanism of the variable geometry stabilizer to adjust the opening angle of the variable geometry stabilizer to the target opening angle.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1-6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-6.

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