A method for high-speed wind tunnel inlet test operation and flow field control

Abstract

The application discloses a high-speed wind tunnel inlet test operation and flow field control method, relates to the technical field of high-speed wind tunnel test, and designs and specifies communication signals of a wind tunnel operation control system, a model posture control system, an inlet cone position operation control system and a measurement and collection system and corresponding simple and clear interaction logic, realizes full adaptation of various inlet test working conditions and orderly control of various interaction systems, ensures smooth collection of test data, avoids system unexpected actions and system interaction response abnormalities caused by complex interaction of various systems, ensures smooth acquisition of test data and effective achievement of test targets, and can greatly reduce scrapped train sets in actual wind tunnel tests.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-speed wind tunnel test, in particular to a high-speed wind tunnel inlet test operation and flow field control method. BACKGROUND

[0002] As the "throat" of the aircraft power system, the performance of the inlet directly affects whether the aircraft power system can work stably and efficiently, and continuously provides reliable flight power for the aircraft. High-speed wind tunnel inlet test is a key test carried out during the development of the aircraft to evaluate the characteristics of the aircraft inlet system under high-speed airflow conditions, and the matching performance of the aircraft body and the engine. It is of great significance to optimize the aircraft forebody and inlet flow channel aerodynamic design, realize the matching work of the inlet and the engine, and improve the tactical performance indicators of the whole machine.

[0003] For a long time, the high-speed wind tunnel inlet test involves many systems (including wind tunnel operation control system, model attitude control system, inlet cone position operation control system, and measurement and collection system, etc.), and the communication interaction logic between the systems is complex. Unintended system actions may occur due to communication signal loss or incomplete interaction logic design, so that the required test data cannot be obtained, the test vehicle is scrapped, and the test cost is wasted. For example, in a certain type of high-speed wind tunnel inlet test, due to the defects in the timing logic design of the wind tunnel flow field start and the inlet cone position adjustment, when the flow field has not been completely established, the cone position system has been actuated in advance, resulting in excessive distortion of the instantaneous flow field inside the inlet. Not only does it trigger the error of the equipment protection mechanism, but also the effective data of this test is completely missing. Similarly, in the interaction link between the model position and the inlet cone position motion adjustment and the measurement and collection, due to the unsatisfied response timeout judgment mechanism, the attitude is not stable and the cone position is not in place, but the collection system has misjudged as "ready" and completed sampling in advance, resulting in invalid test data. SUMMARY

[0004] An object of the present application is to solve at least the above problems and / or deficiencies, and to provide at least the advantages to be described later.

[0005] In order to achieve these objects and other advantages of the present application, a high-speed wind tunnel inlet test operation and flow field control method is provided, comprising:

[0006] S1, the wind tunnel operation control system, the model attitude control system, the inlet cone position motion control system, and the measurement and collection system enter the initial state of work, the wind tunnel operation control system selects to use the injection high opening or the main adjustment high opening mode according to the running specific working condition of the test vehicle inlet test carried out, and starts the wind tunnel through the open loop control mode;

[0007] S2, after the wind tunnel is started, the pressure regulating valve is kept stable at the current operating valve position for a given time, and then the wind tunnel operation control system controls the flow field to enter closed-loop control;

[0008] S3, the wind tunnel operation control system sends control instructions to control the test model position and posture to be in place and the inlet cone position to be in place by changing the level of the communication signal with the model posture control system and the inlet cone position movement control system, and adjusts the flow field by closed-loop control to make the flow field reach and maintain a stable state, thus meeting the test measurement collection conditions;

[0009] S4, the wind tunnel operation control system judges the collection conditions, if the conditions are met, the wind tunnel operation control system changes the high level of the signal that can be collected to notify the measurement collection system to perform test measurement collection, and the measurement collection system performs test measurement collection and notifies the wind tunnel operation control system after the test measurement collection is completed;

[0010] Otherwise, it keeps waiting until the collection conditions are met under the control of the wind tunnel operation control system;

[0011] S5, after the measurement collection system notifies the wind tunnel operation control system that the test measurement collection is completed, the wind tunnel operation control system judges whether the model cone position ladder of the test operation is completed, if yes, it enters S6, otherwise, it returns to S3, and the wind tunnel operation control system notifies the inlet cone position movement control system to control the model cone position to move to the next ladder position;

[0012] S6, the wind tunnel operation control system judges whether the model position and posture ladder of the test operation is completed, if yes, it enters S7, otherwise, the wind tunnel operation control system notifies the model posture control system to control the model position and posture to move to the next ladder position;

[0013] S7, the wind tunnel is shut down.

[0014] Preferably, in S3, the specific process of meeting the test measurement collection conditions includes:

[0015] S310, according to the preset model position and posture target, the wind tunnel operation control system sets the model position and posture movement signal sent to the model posture control system to high level to notify the model movement, and after a set time interval, it starts to wait for the high level feedback of the model in place signal;

[0016] S320, after the model posture control system receives the high level model position and posture movement signal, it starts to control the model support mechanism to move to the next ladder position and posture according to the preset model position and posture target, and when the actual position and posture of the model deviates from the current position and posture target by less than the set allowable error range, it sets the model in place signal sent to the wind tunnel operation control system to high level, otherwise, it keeps low level until the model is in place;

[0017] After receiving a high-level model positioning signal, the S330 wind tunnel operation control system sets the cone movement signal sent to the cone position control system to a high level according to the preset cone position target, notifying the intake cone to move; and after a set time interval, it begins to wait for the high-level feedback of the cone positioning signal.

[0018] After receiving a high-level cone movement signal, the S340 cone position control system starts to control the intake cone to move to the next step position according to the preset cone position target. When the actual position feedback of the cone is less than the current cone position target deviation is less than the set allowable error range, the cone position arrival signal sent to the wind tunnel operation control system is set to high level; otherwise, it remains at low level until the cone position is in place.

[0019] Preferably, in S4, the content of the determination and collection conditions includes:

[0020] The wind tunnel operation control system receives the model positioning signal and maintains it at a high level.

[0021] The wind tunnel operation control system receives a cone position signal that remains at a high level;

[0022] The total pressure, Mach number, and ejection pressure of the current flow field in the wind tunnel are all maintained within the stable range of their respective set targets.

[0023] Preferably, in S4, the specific process for the measurement and acquisition system to perform experimental measurement and acquisition includes:

[0024] S410 After the wind tunnel operation control system determines that the acquisition conditions are met, it sets the acquisition signal sent to the measurement and acquisition system to a high level, and synchronously resets the model pose motion signal and cone motion signal, setting both to a low level.

[0025] S420. After receiving a high-level acquisition signal, the measurement and acquisition system performs test data measurement and acquisition, and marks the corresponding data acquisition time. After the measurement and acquisition is completed, the acquisition completion signal sent by the measurement and acquisition system to the wind tunnel operation control system is set to a high level.

[0026] S430: After receiving a high-level acquisition completion signal, the wind tunnel operation control system resets the acquisition enable signal and sets it to a low level; synchronously, after receiving a low-level acquisition enable signal, the measurement and acquisition system resets the acquisition completion signal and sets it to a low level.

[0027] Preferably, in S1, the ejector high-voltage switch is applied to the wind tunnel deceleration and pressure reduction operation mode, and its workflow specifically includes:

[0028] S110, the wind tunnel operation control system opens the wind tunnel ejector air path pressure regulating valve through an open loop control mode, until opening to a high valve opening position determined according to a test working condition and keeping, and starts to charge pressure of the wind tunnel ejector air path;

[0029] S111, waiting for the ejector pressure to charge to a set target, the wind tunnel operation control system reduces the valve position of the ejector air path pressure regulating valve to a running valve position determined according to the test working condition;

[0030] S120, the wind tunnel operation control system opens the wind tunnel main air path pressure regulating valve through an open loop control mode, until opening to a high valve opening position determined according to a test working condition and keeping, and starts to charge pressure of the wind tunnel main air path;

[0031] S121, waiting for the total pressure of the wind tunnel main air path to charge to a set target, the wind tunnel operation control system reduces the valve position of the main air path pressure regulating valve to a running valve position determined according to the test working condition;

[0032] The main high opening application is applied to the constant speed pressure operation mode of the wind tunnel, and the working process includes S120 to S121.

[0033] Preferably, in S7, the wind tunnel shutdown process includes:

[0034] S700, the wind tunnel operation control system exits the closed loop control, and judges according to the wind tunnel operation mode of the developed vehicle, if the reduced speed pressure operation mode is adopted, enters S710, otherwise enters S730;

[0035] S710, the wind tunnel operation control system reduces the valve position of the main air path pressure regulating valve to a set valve position through an open loop control mode, and waits for the total pressure of the wind tunnel to decrease to a shutdown total pressure;

[0036] S720, the wind tunnel operation control system reduces the valve position of the ejector air path pressure regulating valve through an open loop control mode until closing;

[0037] S730, the wind tunnel operation control system reduces the valve position of the main air path pressure regulating valve through an open loop control mode until closing.

[0038] The present application at least includes the following beneficial effects:

[0039] Firstly, compared with the prior art, the present application designs the communication signals and corresponding simple and clear interaction logic of the wind tunnel operation control system, the model posture control system, the inlet cone position operation control system and the measurement acquisition system and the like, avoids the system unexpected action caused by the complex interaction of the numerous systems, ensures the smooth acquisition of test data and the effective achievement of test target, and can greatly reduce the generation of scrapped vehicles in actual wind tunnel test.

[0040] Secondly, the application has wide application range, and can meet the model position adjustment and the inlet cone position adjustment in the test, and can obtain the test data through one wind tunnel start under the condition that the wind tunnel air source pressure meets the requirement, so that the wind tunnel test efficiency is improved, and the wind tunnel test cost is saved.

[0041] Other advantages, objects, and features of the application will be understood by those skilled in the art from the following description, and will be appreciated when the application is practiced in conjunction with the examples thereof. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The high-speed wind tunnel inlet test operation and flow field control flowchart. DETAILED DESCRIPTION

[0043] The application will be further described in detail below with reference to the drawings, so that those skilled in the art can implement the application according to the description.

[0044] A high-speed wind tunnel inlet test operation and flow field control method, which realizes full adaptation to various inlet test conditions and orderly control of various interactive systems by determining corresponding test operation flow and interactive logic of each system according to the programmed conditions of the inlet test, ensures smooth collection of test data, and avoids test run scrap due to abnormal interactive response of each system, and the specific work flow includes:

[0045] S100: Wind tunnel start. The wind tunnel operation control system, the model attitude control system, the inlet cone position motion control system, and the measurement acquisition system are started and operated. The model attitude control system and the inlet cone position motion control system keep the model position and the inlet cone position stable at the current position, the measurement acquisition system continuously acquires corresponding data information, and the wind tunnel operation control system is switched to S110 if a reduced pressure operation mode is used, or is switched to S200 if a constant pressure operation mode is used.

[0046] S110: High opening. The wind tunnel operation control system opens the wind tunnel injection air path pressure regulating valve through an open-loop control mode until the valve is opened to the high opening valve position determined according to the test condition and is kept, and the wind tunnel injection air path pressure charging is started.

[0047] S120: Injection pressure charging. The injection pressure is charged to the set target, and the wind tunnel operation control system reduces the injection air path pressure regulating valve position to the operation valve position determined according to the test condition.

[0048] S200: Main high open. The wind tunnel operation control system opens the wind tunnel main gas path pressure regulating valve through an open loop control mode, until it is opened to a high open valve position determined according to the test working condition and remains, and the wind tunnel main gas path pressure charging is started.

[0049] S210: Main gas path pressure charging. The wind tunnel operation control system reduces the main gas path pressure regulating valve position to a running valve position determined according to the test working condition, while waiting for the wind tunnel main gas path total pressure to be charged to a set target.

[0050] S300: Turn to closed loop. After keeping the pressure regulating valve stable at the current running valve position for a given time, the wind tunnel operation control system controls the flow field to turn to closed loop control.

[0051] S400: Stable running. The wind tunnel operation control system adjusts the flow field through closed loop control, so that the flow field reaches a stable state.

[0052] S410: Notify model motion. According to the preset model pose target, the wind tunnel operation control system sets the model pose motion signal sent to the model attitude control system to high level, and notifies the model motion; and after a set time interval, it starts to wait for the high level feedback of the model in-place signal.

[0053] S420: Model motion in place. After the model attitude control system receives the high level model pose motion signal, it starts to control the model support mechanism to move to the next step pose according to the preset model pose target, and sets the model in-place signal sent to the wind tunnel operation control system to high level when the actual pose feedback by the model deviates from the current pose target by less than a set allowable error range, otherwise it remains low until the model moves in place.

[0054] S430: Notify cone position motion. After the wind tunnel operation control system receives the high level model in-place signal, it sets the cone position motion signal sent to the cone position control system to high level according to the preset cone position target, and notifies the inlet cone position motion; and after a set time interval, it starts to wait for the high level feedback of the cone in-place signal.

[0055] S440: Cone position motion in place. After the cone position control system receives the high level cone position motion signal, it starts to control the inlet cone position to move to the next step position according to the preset cone position target, and sets the cone in-place signal sent to the wind tunnel operation control system to high level when the actual position feedback by the cone deviates from the current cone position target by less than a set allowable error range, otherwise it remains low until the cone moves in place.

[0056] S500: Collecting condition judgment. After the wind tunnel operation control system receives the high level signal of the cone position reaching the target position, it starts to judge whether the test data collection condition is met. If the total pressure, Mach number and ejector pressure (judged in the reduced pressure operation mode) are all maintained within the stable range of the respective set targets, and the model position signal and the cone position signal are also high level signals, the wind tunnel operation control system will send a high level signal to the measurement collection system, and reset the model position signal and the cone position signal to low level, otherwise it will keep waiting until the collection condition is met under the control of the wind tunnel operation control system.

[0057] S510: Test data collection. After the measurement collection system receives the high level signal, it starts to collect test data and marks the corresponding data collection time. After the measurement collection is completed, the measurement collection system sends a high level signal to the wind tunnel operation control system.

[0058] S520: Data collection completion. After the wind tunnel operation control system receives the high level signal, it resets the collection signal to low level. At the same time, the measurement collection system resets the output signal to low level after receiving the low level signal.

[0059] S600: Step completion judgment. It is judged whether the current test model position step and the cone position step are all completed.

[0060] S610: Cone position step judgment. The wind tunnel operation control system judges whether the current cone position reaches the last preset cone position target. If yes, it goes to S620; if not, it goes to S430.

[0061] S620: Position step judgment. The wind tunnel operation control system judges whether the current model position reaches the last preset model position target. If yes, it goes to S700; if not, it goes to S410.

[0062] S700: Wind tunnel shutdown. The wind tunnel operation control system exits the closed loop control and judges according to the running mode of the vehicle. If the reduced pressure operation mode is used, it goes to S710; if the constant pressure operation mode is used, it goes to S730.

[0063] S710: Shutdown total pressure judgment. The wind tunnel operation control system reduces the valve position of the main gas path pressure regulating valve to the set valve position through open loop control, and waits for the wind tunnel total pressure to decrease to the shutdown total pressure.

[0064] S720: Ejector gas path shutdown. The wind tunnel operation control system reduces the valve position of the ejector gas path pressure regulating valve to the set valve position through open loop control.

[0065] S730: Main air path is closed. The wind tunnel operation control system reduces the valve position of the main air path pressure regulating valve by open-loop control until it is closed.

[0066] Embodiments

[0067] For a certain high-speed wind tunnel inlet test vehicle, the test operation target Mach number is 0.6, the target total pressure is 87 kPa, and the target ejector pressure is 500 kPa. The model position target is 3 steps, which are respectively attack angle-2°, 0° and 2°. The cone position target is 5 steps, which are respectively 10%, 25%, 40%, 65% and 85%. As shown in the high-speed wind tunnel inlet test operation and flow field control method disclosed by the application, the specific test implementation includes the following: Figure 1

[0068] S100: The wind tunnel is started. The wind tunnel operation control system, the measurement and collection system, the model attitude control system and the inlet cone position motion control system are started and operated. The model attitude control system and the inlet cone position motion control system keep the model position and the inlet cone position stable at the current position, the measurement and collection system continuously collects corresponding data information, and the wind tunnel operation control system is in the speed reduction pressure operation mode according to the specific operation condition of the inlet test of the current vehicle, and enters S110.

[0069] S110: High opening of the ejector. The wind tunnel operation control system opens the wind tunnel ejector air path pressure regulating valve by open-loop control, and the pressure regulating valve is gradually opened until the high opening valve position 420 mm is reached and maintained. This process ensures that the pressure of the ejector air path rises smoothly.

[0070] S120: Ejector pressure charging. The change of the ejector pressure is monitored, and when the ejector pressure is charged to 95% of the target ejector pressure 500 kPa, the wind tunnel operation control system reduces the valve position of the ejector air path pressure regulating valve to the preset operation valve position 400 mm, so as to shorten the time required for the ejector pressure charging as much as possible and reduce the stable adjustment fluctuation of the ejector pressure.

[0071] S200: Main high opening. The wind tunnel operation control system opens the wind tunnel main air path pressure regulating valve by open-loop control, and the pressure regulating valve is gradually opened until the high opening valve position 350 mm is reached and maintained.

[0072] S210: Main air path pressure charging. The change of the wind tunnel total pressure is monitored, and when the wind tunnel total pressure is charged to 95% of the target total pressure 87 kPa, the wind tunnel operation control system reduces the valve position of the main air path pressure regulating valve to the preset operation valve position 330 mm, so as to shorten the time required for the total pressure charging as much as possible and reduce the stable adjustment fluctuation of the total pressure.

[0073] S300: Switch to closed loop. After keeping the pressure regulating valve stable at the current operation valve position for 2 seconds, the wind tunnel operation control system controls the flow field to switch to closed loop control. The switching time is to reduce the flow field fluctuation when switching between open loop and closed loop.​

[0074] S400: Stable operation. The wind tunnel operation control system adjusts the flow field parameters in real time through closed-loop control, including total pressure, static pressure, Mach number and other key parameters, so that the flow field reaches and maintains a stable state. The system continuously monitors the stability indicators of the flow field to ensure that the test requirements are met.

[0075] S410: Notify model motion. The wind tunnel operation control system sends a model pose motion signal to the model attitude control system according to the preset model pose target parameters (attack angle -2°, 0° and 2°), and sets it to high level and keeps it. To avoid the possible mis-triggering caused by the high level feedback of the current model to the position, the system delays for 1 second after executing the signal switching, and then starts to wait for the high level feedback of the model to the position signal.

[0076] S420: Model motion to position. After receiving the high level model pose motion signal, the model attitude control system starts to control the model support mechanism to move to the next pose target according to the preset model pose target (attack angle -2°, 0° and 2°). The model to position signal sent by the model attitude control system to the wind tunnel operation control system is determined by the deviation between the actual pose feedback by the model and the current pose target. When the pose deviation is less than the set allowable error range, the model to position signal outputs high level; otherwise, it outputs low level. This deviation determination mechanism separates the high and low level change rules of the response signal from the complex interactive response logic and determines only by the actual pose deviation, which fundamentally avoids the false "to position" situation when the model does not reach the stable pose, and ensures the strict consistency between the actual state of the model and the system signal.

[0077] S430: Notify cone position motion. After receiving the high level model to position signal, the wind tunnel operation control system starts to send a cone position motion signal to the cone position control system according to the preset cone position target parameters (10%, 25%, 40%, 65%, 85%), and sets it to high level and keeps it. The 1 second delay strategy is followed, and after 1 second after the signal changes, the system starts to wait for the high level feedback of the cone to position signal, thereby strictly restricting the starting condition of the cone motion in time sequence and preventing the early entry into S500 step due to the high level feedback of the current model to position, which causes the response logic error.

[0078] S440: Cone position motion to position. After receiving the high level cone position motion signal, the cone position control system starts to control the cone to move to the next target position according to the preset cone position target parameters (10%, 25%, 40%, 65%, 85%). Similarly, the deviation between the actual position feedback by the cone and the current target position determines the level of the cone to position signal sent by the cone position control system to the wind tunnel operation control system. When the position deviation is less than the set allowable error range, the cone to position signal is set to high level; otherwise, it is set to low level.

[0079] S500: Collecting condition determination. After the wind tunnel operation control system receives the high level cone position signal, it starts to determine whether the test data collection condition is met. If the deviation of the current actual total pressure from the target total pressure 87kPa is within the stable target range of ±0.5%, the deviation of the current actual Mach number from the target Mach number 0.6 is within the stable target range of ±0.5%, the deviation of the current ejector pressure from the target ejector pressure 500kPa is within the stable target range of ±1%, and the model position signal and the cone position signal are also high level signals, the wind tunnel operation control system sends a high level signal to the measurement collection system, resets the model position signal and the cone position signal to low level, and keeps waiting until the collection condition is met under the control of the wind tunnel operation control system. Through this multi-condition cooperative determination mechanism, the risk of data failure caused by unexpected movement of the model or the cone during the collection process is completely eliminated, and the problem of unexpected action and data collection failure caused by single system response abnormality or timing error is fundamentally solved, ensuring the effectiveness of the test vehicle.

[0080] S510: Test data collection. After the measurement collection system receives the high level collectable signal, it starts to perform the test data collection task, including: collecting pressure data of each pressure measuring point; recording collection time mark; storing related test parameters. When the data collection and time mark are completed, the measurement collection system sends a high level collection completion signal to the wind tunnel operation control system.

[0081] S520: Data collection completion. After the wind tunnel operation control system receives the high level collection completion signal, it resets the collectable signal to low level. At the same time, the measurement collection system resets the output collection completion signal to low level when it receives the low level collectable signal, completing the current stage data collection cycle.

[0082] S600: Stage completion determination. The system determines whether the model position stage and the cone position stage of the current test run are completed to determine the subsequent process.

[0083] S610: Cone position stage determination. The wind tunnel operation control system determines whether the current cone position reaches the last preset cone position target 85%. If it has reached the last position, it goes to S620 for position stage determination; if it has not reached, it returns to S430 to continue the test of the next cone position.

[0084] S620: Position stage determination. The wind tunnel operation control system determines whether the current model position reaches the last preset model position target attack angle 2°. If it has reached the last position, it goes to S700 to execute the wind tunnel shutdown; if it has not reached, it returns to S410 to continue the test of the next position.

[0085] S700: Wind tunnel closing. The wind tunnel operation control system exits the closed-loop control mode, and the wind tunnel operation control system is in the reduced pressure operation mode according to the specific operation condition of the current test of the inlet, and goes to S710.

[0086] S710: Total pressure closing determination. The wind tunnel operation control system gradually reduces the valve position of the main gas path pressure regulating valve to the preset closing valve position by the open-loop control mode, and the system monitors the change of the total pressure of the wind tunnel, and waits for the total pressure of the wind tunnel to be reduced to the preset closing total pressure.

[0087] S720: Ejection gas path closing. The wind tunnel operation control system gradually reduces the valve position of the ejection gas path pressure regulating valve by the open-loop control mode, until the ejection gas path is completely closed, and the ejection system is ensured to be safely stopped.

[0088] S730: Main gas path closing. The wind tunnel operation control system gradually reduces the valve position of the main gas path pressure regulating valve by the open-loop control mode, until the main gas path is completely closed, and the wind tunnel closing process is completed.

[0089] The above scheme is only a description of a preferred example, but is not limited thereto. In the implementation of the present application, appropriate replacement and / or modification can be made according to the user's needs.

[0090] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present application. Additional modifications can be easily realized by those skilled in the art. Therefore, the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A method for test operation and flow field control of a high-speed wind tunnel inlet, characterized in that, include: S1. The wind tunnel operation control system, model attitude control system, inlet cone motion control system, and measurement and acquisition system enter the initial working state. The wind tunnel operation control system selects the ejector high-opening or main-tuning high-opening mode according to the specific operating conditions of the inlet test of the train being carried out, and starts the wind tunnel through open-loop control. S2. After the wind tunnel is started, the pressure regulating valve is kept stable at the current operating valve position for a given time, and then the wind tunnel operation control system switches the flow field to closed-loop control. S3, the wind tunnel operation control system sends control commands to control the test model to the correct position and the inlet cone to the correct position by changing the level of the communication signal with the model attitude control system and the inlet cone motion control system. It also adjusts the flow field through closed-loop control to achieve and maintain a stable flow field, thus enabling test measurement and data acquisition. S4. The wind tunnel operation control system determines the acquisition conditions. If the conditions are met, the system changes the high level of the acquisition signal sent by the wind tunnel operation control system to the measurement and acquisition system to notify the measurement and acquisition system to perform experimental measurement and acquisition. The measurement and acquisition system performs experimental measurement and acquisition and notifies the wind tunnel operation control system after the experimental measurement and acquisition is completed. Otherwise, wait until the data acquisition conditions are met under the control of the wind tunnel operation control system; In S4, the content of the determination and acquisition conditions includes: The wind tunnel operation control system receives the model positioning signal and maintains it at a high level. The wind tunnel operation control system receives a cone position signal that remains at a high level; The total pressure, Mach number, and ejector pressure of the current flow field in the wind tunnel are all kept within the stable range of their respective set targets; S5. After the measurement and acquisition system notifies the wind tunnel operation control system to complete the test measurement and acquisition, the wind tunnel operation control system determines whether the model cone step of the test operation has been completed. If so, proceed to S6; otherwise, return to S3. The wind tunnel operation control system notifies the inlet cone motion control system to control the model cone to move to the next step position. S6. The wind tunnel operation control system determines whether the model pose step of the test run has been completed. If so, proceed to S7; otherwise, the wind tunnel operation control system notifies the model attitude control system to control the model pose to move to the next step. S7, Wind Tunnel Shutdown.

2. The method for high-speed wind tunnel inlet test operation and flow field control as described in claim 1, characterized in that, In S3, the specific process for obtaining experimental measurement and data acquisition conditions includes: S310. According to the preset model pose target, the wind tunnel operation control system sets the model pose motion signal sent to the model attitude control system to a high level to notify the model to move; and after a set time interval, it starts to wait for the high-level feedback of the model's position signal. S320: After receiving a high-level model pose motion signal, the model attitude control system starts to control the model support mechanism to move to the next step pose according to the preset model pose target. When the deviation between the actual pose fed back by the model and the current pose target is less than the set allowable error range, the model positioning signal sent to the wind tunnel operation control system is set to high level; otherwise, it remains low level until the model moves to the position. After receiving a high-level model positioning signal, the S330 wind tunnel operation control system sets the cone movement signal sent to the cone position control system to a high level according to the preset cone position target, notifying the intake cone to move; and after a set time interval, it begins to wait for the high-level feedback of the cone positioning signal. After receiving a high-level cone movement signal, the S340 cone position control system starts to control the intake cone to move to the next step position according to the preset cone position target. When the actual position feedback of the cone is less than the current cone position target deviation is less than the set allowable error range, the cone position arrival signal sent to the wind tunnel operation control system is set to high level; otherwise, it remains at low level until the cone position is in place.

3. The method for high-speed wind tunnel inlet test operation and flow field control as described in claim 1, characterized in that, In S4, the specific process for the measurement and acquisition system to perform experimental measurement and acquisition includes: S410 After the wind tunnel operation control system determines that the acquisition conditions are met, it sets the acquisition signal sent to the measurement and acquisition system to a high level, and synchronously resets the model pose motion signal and cone motion signal, setting both to a low level. S420. After receiving a high-level acquisition signal, the measurement and acquisition system performs test data measurement and acquisition, and marks the corresponding data acquisition time. After the measurement and acquisition is completed, the acquisition completion signal sent by the measurement and acquisition system to the wind tunnel operation control system is set to a high level. S430: After receiving a high-level acquisition completion signal, the wind tunnel operation control system resets the acquisition enable signal and sets it to a low level; synchronously, after receiving a low-level acquisition enable signal, the measurement and acquisition system resets the acquisition completion signal and sets it to a low level.

4. The method for high-speed wind tunnel inlet test operation and flow field control as described in claim 1, characterized in that, In S1, the ejector high-voltage switch is applied to the wind tunnel deceleration and pressure reduction operation mode, and its workflow specifically includes: S110 The wind tunnel operation control system opens the wind tunnel ejector gas path pressure regulating valve through open-loop control until it is opened to the high-opening valve position determined according to the test conditions and is maintained, thus starting the pressurization of the wind tunnel ejector gas path. S111. Wait for the ejector pressure to reach the set target, and the wind tunnel operation control system reduces the ejector gas path pressure regulating valve position to the operating valve position determined according to the test conditions. S120 The wind tunnel operation control system opens the wind tunnel main air circuit pressure regulating valve through open-loop control until it is opened to the high-opening valve position determined according to the test conditions and is maintained, thus starting the pressurization of the wind tunnel main air circuit. S121. Wait for the total pressure of the main air circuit of the wind tunnel to reach the set target, and the wind tunnel operation control system reduces the valve position of the main air circuit pressure regulating valve to the operating valve position determined according to the test conditions; The main high-speed opening is applied to the wind tunnel's normal speed and pressure operation mode, and its workflow includes S120 to S121.

5. The method for high-speed wind tunnel inlet test operation and flow field control as described in claim 1, characterized in that, In S7, the wind tunnel shutdown process includes: S700: The wind tunnel operation control system exits closed-loop control. It determines the wind tunnel operation mode based on the operation mode of the train being operated. If the speed reduction and pressure reduction operation mode is adopted, it enters S710; otherwise, it enters S730. S710, the wind tunnel operation control system reduces the main air circuit pressure regulating valve position to the set position through open-loop control, waiting for the total wind tunnel pressure to drop to the shutdown total pressure; The S720 wind tunnel operation control system reduces the position of the ejector gas path pressure regulating valve until it is closed through open-loop control. The S730 wind tunnel operation control system reduces the position of the main air circuit pressure regulating valve until it is closed through open-loop control.

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