Test bench fan control method, device, control equipment and storage medium

Abstract

The present application provides a fan control method, device, control equipment and storage medium for a test bench, and relates to the field of bench test technology. The method includes: obtaining the control parameters currently used to control the operation of the fan, wherein the fan is used to blow air to the engine on the test bench, and a wind speed sensor for detecting the wind speed is provided on the engine or the test bench; then based on the control parameters, the speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameters is within a preset range. In this way, the wind speed can be flexibly adjusted so that the running fan can reach different expected wind speeds to match the different needs of the test.

Description

Technical Field

[0001] The present invention relates to the technical field of bench testing, and in particular to a fan control method, device, control equipment and storage medium of a test bench. Background Art

[0002] During the development process, the engine needs to undergo bench tests such as calibration, performance testing, and reliability testing to meet performance and reliability requirements. In addition, in order to improve the quality level of the engine, it is necessary to discover and expose the quality problems of the engine as much as possible before leaving the factory, so as to improve the engine. In this regard, the whole machine factory will carry out some tests simulating whole vehicle tests or user operating conditions. The heat dissipation of the engine exhaust manifold is an important factor affecting the temperature of the engine compartment of the whole vehicle. In the whole vehicle, the exhaust side of the engine is generally arranged at the front end of the vehicle. The flowing air during driving will blow and cool the engine, and the wind speed of the air varies with the vehicle speed. In the bench test simulating user operating conditions, due to limited conditions, it is generally used to maintain a constant wind speed for blowing with a fan, and the wind speed cannot be flexibly adjusted to match the needs of the test. Summary of the invention

[0003] In view of this, an object of the embodiments of the present application is to provide a fan control method, device, control equipment and storage medium for a test bench, which can improve the problem of not being able to flexibly adjust the wind speed to match the test requirements.

[0004] In order to achieve the above technical objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a fan control method for a test bench, the method comprising:

[0006] Acquiring a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench;

[0007] Based on the control parameter, the rotation speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range.

[0008] In combination with the first aspect, in some optional implementations, obtaining the control parameters currently used to control the operation of the fan includes:

[0009] Acquiring operating parameters of the engine when it is running, wherein the operating parameters include a speed and a load of the engine and a target vehicle speed corresponding to the speed and the load;

[0010] Based on a pre-stored first correspondence between vehicle speed and wind speed, determining a wind speed corresponding to the target vehicle speed as an expected wind speed;

[0011] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0012] In combination with the first aspect, in some optional implementations, obtaining the control parameters currently used to control the operation of the fan includes:

[0013] Extracting the desired wind speed carried in the control instruction from the received control instruction;

[0014] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0015] In combination with the first aspect, in some optional implementations, before obtaining the control parameters currently used to control the operation of the fan, the method further includes:

[0016] Acquire multiple sets of rotational speeds of the fan and wind speeds sensed by the wind speed sensor, wherein the rotational speed and wind speed in each set of data are collected in the same period of time;

[0017] According to the rotation speeds of the plurality of wind fans and the wind speeds sensed by the wind speed sensors, a corresponding relationship between the rotation speeds and the wind speeds is established as a second corresponding relationship.

[0018] In combination with the first aspect, in some optional implementations, controlling the rotation speed of the fan based on the control parameter includes:

[0019] Based on the control parameters, the rotation speed of the fan is controlled by a PID control algorithm.

[0020] In combination with the first aspect, in some optional implementations, controlling the rotation speed of the fan based on the control parameter includes:

[0021] The fan is controlled to operate at a target speed in the control parameters.

[0022] In combination with the first aspect, in some optional implementations, the method further includes:

[0023] When the duration that the difference between the actual wind speed and the expected wind speed is not within the preset range exceeds a set duration, an alarm prompt message is issued.

[0024] In a second aspect, an embodiment of the present application further provides a fan control device for a test bench, the device comprising:

[0025] an acquisition unit, configured to acquire a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench;

[0026] A control unit is used to control the rotation speed of the fan based on the control parameter so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range.

[0027] In a third aspect, an embodiment of the present application further provides a control device, comprising a processor and a memory coupled to each other, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the control device executes the above method.

[0028] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium. When the computer program is executed on a computer, the computer executes the above method.

[0029] The invention adopting the above technical solution has the following advantages:

[0030] In the technical solution provided in the present application, by obtaining the control parameters currently used to control the operation of the fan, wherein the fan is used to blow air to the engine on the test bench, and a wind speed sensor for detecting the wind speed is provided on the engine or the test bench; then based on the control parameters, the rotation speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameters is within a preset range. In this way, the wind speed can be flexibly adjusted so that the running fan can reach different expected wind speeds to match the different needs of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present application may be further described by the non-limiting embodiments given in the accompanying drawings. It should be understood that the following drawings only illustrate certain embodiments of the present application and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings may be obtained based on these drawings without creative effort.

[0032] Figure 1 A schematic diagram of the connection between the control device provided in an embodiment of the present application and a fan and an engine.

[0033] Figure 2 A schematic flow chart of a fan control method for a test bench provided in an embodiment of the present application.

[0034] Figure 3A block diagram of a fan control device for a test bench provided in an embodiment of the present application.

[0035] Icons: 10-control device; 11-wind speed sensor; 20-fan; 30-engine; 40-test bench; 200-fan control device; 210-acquisition unit; 220-control unit. DETAILED DESCRIPTION

[0036] The present application will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers, and the implementation methods not shown or described in the drawings are forms known to ordinary technicians in the relevant technical field. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] Please refer to Figure 1 , an embodiment of the present application provides a control device 10. The control device 10 can be electrically connected to a fan 20 and a wind speed sensor 11. The fan 20 is used to blow air to an engine 30 located on a test bench 40. The model and structure of the engine 30 can be flexibly determined according to actual conditions. The test bench 40 is used to fix the engine 30. The engine 30 can be an engine assembly of a vehicle.

[0038] The wind speed sensor 11 can sense the air flow rate near the engine 30 as the actual wind speed sensed. The number of wind speed sensors 11 can be one or more. The wind speed sensor 11 can be set on the test bench 40, or on the surface of the engine 30. Alternatively, the wind speed sensor 11 is set on the test bench 40 and the surface of the engine 30. The setting position of the wind speed sensor 11 can be flexibly determined according to actual conditions, as long as the wind speed sensor 11 can sense the air flow rate near the engine 30.

[0039] The orientation of the engine 30 and the fan 20 can be flexibly set according to actual conditions. For example, if the exhaust side of the engine 30 is arranged at the front end of the vehicle, the fan 20 is oriented toward the exhaust side of the engine 30 to blow air to the exhaust side of the engine 30. That is, by blowing air from the indoor fan 20 to the engine 30, it is possible to simulate a scene in which the air blows toward the engine 30 from the front end of the vehicle while the vehicle is driving.

[0040] In this embodiment, the control device 10 can control the rotation speed of the fan 20 based on the actual wind speed sensed by the wind speed sensor 11. The control device 10 may include a processing module and a storage module. The storage module stores a computer program, and when the computer program is executed by the processing module, the control device 10 can execute the corresponding steps in the following test bench fan 20 control method.

[0041] The control device 10 may be, but is not limited to, a host computer, a personal computer, etc. The control device 10 may communicate with the fan 20 via a serial interface, and the control device 10 may output a PWM (Pulse Width Modulation) signal to the fan, and control the speed of the fan via the PWM signal.

[0042] Please refer to Figure 2 The present application also provides a method for controlling a fan 20 of a test bench 40, referred to as a fan 20 control method. The fan 20 control method can be applied to the above-mentioned control device 10, and each step of the method is executed or implemented by the control device 10. The fan 20 control method can include the following steps:

[0043] Step 110, obtaining a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench;

[0044] Step 120: Based on the control parameter, the rotation speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range.

[0045] The following will describe the various steps of the fan control method in detail as follows:

[0046] In step 110, the control device can flexibly obtain control parameters according to actual conditions. The control parameters may include, but are not limited to, the actual wind speed sensed by the wind speed sensor, the expected wind speed, the target speed for controlling the operation of the fan, etc. Among them, the expected wind speed and the target speed can be flexibly determined according to actual conditions. For example, the expected wind speed can be manually input by the operator through the control device. The target speed is the speed of the fan corresponding to the expected wind speed.

[0047] In step 120, the control device can control the speed of the fan based on the expected wind speed or target speed in the control parameters, so that when the wind blown by the fan reaches the wind speed sensor, the actual wind speed sensed by the wind speed sensor is the same as the expected wind speed or the difference is small. In this way, the control device can flexibly control the fan to adjust the wind speed according to different test requirements of the operator, so that the wind speed near the engine accurately reaches the corresponding specified value, thereby facilitating accurate testing of the engine.

[0048] In this embodiment, the difference between the actual wind speed and the expected wind speed is within a preset range, wherein the difference refers to the absolute value of the difference between the actual wind speed and the expected wind speed. The preset range can be flexibly set according to actual conditions and is a range value used to indicate a smaller wind speed difference.

[0049] As an optional implementation, step 110 may include:

[0050] Acquiring operating parameters of the engine when it is running, wherein the operating parameters include a speed and a load of the engine and a target vehicle speed corresponding to the speed and the load;

[0051] Based on a pre-stored first correspondence between vehicle speed and wind speed, determining a wind speed corresponding to the target vehicle speed as an expected wind speed;

[0052] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0053] In this embodiment, the control device can obtain the engine operating parameters from various sensors installed on the engine. For example, the sensor may include but is not limited to a speed sensor for detecting the engine speed, a load sensor for detecting the engine load, and the like.

[0054] The operating parameters may include, but are not limited to, the engine speed and load. For example, the operating parameters may also include the vehicle speed corresponding to the engine operation. The target vehicle speed may be understood as the vehicle speed under the same operating parameters when the engine is installed on the vehicle.

[0055] In this embodiment, after the engine is installed on the vehicle, there is a mapping relationship between the engine speed, load, and the vehicle speed. The control device can store the mapping relationship, and based on the mapping relationship, the vehicle speed corresponding to the current engine speed and load can be obtained as the target vehicle speed.

[0056] Similarly, during the driving process of the vehicle, there is a mapping relationship between the vehicle speed and the wind speed near the engine surface on the vehicle, and the control device can also pre-store the mapping relationship between the vehicle speed and the wind speed near the engine as a first corresponding relationship. Then, the control device can determine the wind speed corresponding to the target vehicle speed based on the first corresponding relationship as the expected wind speed.

[0057] In addition, during the bench test, the inventors found that there is a mapping relationship between the rotation speed of the fan and the wind speed near the engine sensed by the wind speed sensor. The control device can pre-store the mapping relationship between the rotation speed and the wind speed as a second corresponding relationship. When performing the bench test, the control device can determine the rotation speed corresponding to the expected wind speed based on the second corresponding relationship as the target rotation speed for controlling the operation of the fan. In this way, when the fan runs at the target speed, the wind speed value sensed by the wind speed sensor is the same as or close to the expected wind speed. Furthermore, during the bench test, the control device can control the wind formed by the fan near the engine to be close to the wind formed when the engine is installed on the vehicle under the same operating parameters based on the engine speed and load, so as to simulate an environment closer to the actual driving of the vehicle for the engine on the test bench, thereby facilitating the improvement of the accuracy and reliability of the bench test.

[0058] As an optional implementation, step 110 may include:

[0059] Extracting the desired wind speed carried in the control instruction from the received control instruction;

[0060] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0061] Understandably, the tester can use the control device to manually input the expected wind speed, and the control device generates a control instruction based on the input expected wind speed, so that the control instruction carries the field content representing the expected wind speed. Among them, the expected wind speed can be flexibly input by the tester according to the test requirements. Then, the control device can determine the speed corresponding to the expected wind speed based on the second corresponding relationship between the speed and the wind speed, as the target speed for controlling the operation of the fan. In this way, the tester can manually input the expected wind speed to achieve flexible adjustment of the wind speed on the surface of the engine, which is conducive to meeting different test requirements.

[0062] Before step 110, the method may further include:

[0063] Acquire multiple sets of rotational speeds of the fan and wind speeds sensed by the wind speed sensor, wherein the rotational speed and wind speed in each set of data are collected in the same period of time;

[0064] According to the rotation speeds of the plurality of wind fans and the wind speeds sensed by the wind speed sensors, a corresponding relationship between the rotation speeds and the wind speeds is established as a second corresponding relationship.

[0065] In this embodiment, the rotation speed and wind speed in each set of data are collected in the same period. For example, the wind speed and the rotation speed are data collected in the same second. In addition, different wind speeds can be collected for different rotation speeds, so that multiple sets of data can be obtained. Among them, the number of sets of wind speed and rotation speed collected can be flexibly determined according to actual conditions.

[0066] After collecting multiple sets of data, with the fan speed x as the independent variable and the wind speed y at the collection point as the dependent variable, you can use tools such as Excel or Origin to perform polynomial fitting. That is, first use the fan speed x as the horizontal coordinate, the wind speed y as the vertical coordinate, and each set of data as a coordinate. Generate a scatter plot based on the multiple sets of collected data, and then perform polynomial fitting to determine one or more suitable fitting curves with the smallest error, thereby obtaining the calculation formula y=f(x) for wind speed fitting. This calculation formula can be understood as a mapping relationship or corresponding relationship between wind speed and rotation speed. In this way, the above-mentioned second corresponding relationship can be created.

[0067] Step 120 may include: controlling the rotation speed of the fan by a PID control algorithm based on the control parameter.

[0068] In this embodiment, the control device can control the speed of the fan using the PID control algorithm based on the expected wind speed in the control parameter, so that when the wind generated by the fan reaches the wind speed sensor, the actual wind speed sensed by the wind speed sensor is the same as the expected wind speed. The PID control algorithm can be implemented by the following formula:

[0069] u(t)=K P err(t)+1 / T I *∫err(t)dt+T D derr(t) / dt (1)

[0070] In formula (1), u(t) is the output value of the control device, that is, the speed of the fan; err(t) is the difference between the expected wind speed and the actual wind speed (or the difference between the real-time value of the fan speed and the speed value corresponding to the expected wind speed), K P is the proportionality coefficient, T I is the integration coefficient, T D is the differential coefficient, ∫ is the integral operator, and derr(t) is the differential operation of err(t). The control device can dynamically output the fan speed control signal using the PID control device, so that the actual wind speed at the wind speed sensor collection point approaches or is equal to the expected wind speed value.

[0071] As an optional implementation, step 120 may include: controlling the fan to operate at a target rotation speed in the control parameter.

[0072] In this embodiment, the control device can generate a PWM signal corresponding to the target speed, and output the PWM signal to the fan, so that the fan can operate at the target speed based on the PWM signal. It can be understood that different PWM signals can allow the fan to operate at different speeds, and the fan speed can be adjusted. Since there is a mapping relationship between the speed of the fan and the wind speed of the collection point. Therefore, in an indoor windless environment, when the fan runs at the target speed, the wind speed of the corresponding collection point will be equal to or close to the expected wind speed. In this way, the PWM signal can be used to achieve precise control of the wind speed of the collection point.

[0073] In this embodiment, the method may further include: when the duration that the difference between the actual wind speed and the expected wind speed is not within the preset range exceeds a set duration, issuing an alarm prompt message.

[0074] In this embodiment, the preset range and the set duration can be flexibly determined according to the actual situation. If the difference between the actual wind speed and the expected wind speed is continuously not within the preset range and the duration exceeds the set duration, it means that the expected wind speed is too high or there is a fault in the control of the control device. At this time, by issuing an alarm prompt, it is helpful for the test personnel to find the abnormal situation in time, so as to carry out timely maintenance on the abnormal problem.

[0075] Based on the above design, the control device can approximate the relationship formula between the collected fan speed value and the actual wind speed value of the corresponding test point by performing polynomial fitting, thereby realizing the control of the wind speed at the test point, so that the wind speed of the test bench corresponds to the wind speed on the engine surface when the vehicle is driving, which is beneficial to improving the accuracy of the bench test. In addition, the control device controls the fan speed through PID, which can achieve fast and accurate control of the wind speed and reduce the wind speed error. Furthermore, the fan control method has strong versatility, and different test objects or different bench test systems can use this method to control the wind speed.

[0076] Please refer to Figure 3 The present application also provides a fan control device 200 for a test bench, referred to as the fan control device 200. The fan control device 200 includes at least one software function module that can be stored in a storage module or fixed in an operating system (OS) in the form of software or firmware. The processing module is used to execute the executable module stored in the storage module, such as the software function module and computer program included in the fan control device 200.

[0077] The fan control device 200 may include an acquisition unit 210 and a control unit 220, and the functions of each unit may be as follows:

[0078] An acquisition unit 210, configured to acquire a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench;

[0079] The control unit 220 is used to control the rotation speed of the fan based on the control parameter so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range.

[0080] Optionally, the acquisition unit 210 may be used to:

[0081] Acquiring operating parameters of the engine when it is running, wherein the operating parameters include a speed and a load of the engine and a target vehicle speed corresponding to the speed and the load;

[0082] Based on a pre-stored first correspondence between vehicle speed and wind speed, determining a wind speed corresponding to the target vehicle speed as an expected wind speed;

[0083] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0084] Optionally, the acquisition unit 210 may be used to:

[0085] Extracting the desired wind speed carried in the control instruction from the received control instruction;

[0086] Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

[0087] Optionally, the fan control device 200 may further include a relationship establishing unit. Before the acquisition unit 210 acquires the control parameters currently used to control the operation of the fan, the acquisition unit 210 may also be used to acquire multiple groups of rotational speeds of the fan and wind speeds sensed by the wind speed sensor, wherein the rotational speed and wind speed in each group of data are collected in the same time period; the relationship establishing unit is used to establish a corresponding relationship between the rotational speed and the wind speed according to the multiple groups of rotational speeds of the fan and the wind speeds sensed by the wind speed sensor as a second corresponding relationship.

[0088] Optionally, the control unit 220 may be configured to: control the rotation speed of the fan by a PID control algorithm based on the control parameters.

[0089] Optionally, the control unit 220 may be configured to control the fan to operate at a target rotation speed in the control parameters.

[0090] Optionally, the wind turbine control device 200 may further include a prompt unit. The prompt unit is used to issue an alarm prompt message when the difference between the actual wind speed and the expected wind speed is not within the preset range for a period exceeding a set period.

[0091] In this embodiment, the processing module may be an integrated circuit chip having the ability to process signals. The above-mentioned processing module may be a general-purpose processor. For example, the processor may be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and may implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application.

[0092] The storage module may be, but is not limited to, a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc. In this embodiment, the storage module may be used to store the first corresponding relationship, the second corresponding relationship, etc. Of course, the storage module may also be used to store a program, and the processing module executes the program after receiving the execution instruction.

[0093] It should be noted that technicians in the relevant field can clearly understand that for the convenience and simplicity of description, the specific working process of the control device described above can refer to the corresponding process of each step in the aforementioned method, and will not be elaborated here.

[0094] The embodiment of the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is run on a computer, the computer executes the fan control method of the test bench as described in the above embodiment.

[0095] Through the description of the above implementation methods, technical personnel in this field can clearly understand that the present application can be implemented by hardware, and can also be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a control device, or a network device, etc.) to execute the methods described in each implementation scenario of the present application.

[0096] In summary, the embodiments of the present application provide a method, device, control equipment and storage medium for controlling a fan of a test bench. In this solution, by obtaining the control parameters currently used to control the operation of the fan, wherein the fan is used to blow air to the engine on the test bench, and a wind speed sensor for detecting the wind speed is provided on the engine or the test bench; then based on the control parameters, the rotation speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameters is within a preset range, so that the wind speed can be flexibly adjusted so that the running fan can reach different expected wind speeds to match the different needs of the test.

[0097] In the embodiments provided in the present application, it should be understood that the disclosed device, system and method can also be implemented in other ways. The above-described device, system and method embodiments are merely schematic, for example, the flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a part of a module, a program segment or a code, and a part of the module, program segment or code contains one or more executable instructions for implementing the specified logical function. It should also be noted that each box in the block diagram and / or the flowchart, and the combination of the boxes in the block diagram and / or the flowchart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions. In addition, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0098] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fan control method for a test bench, characterized in that: The method comprises: Acquiring a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench; Based on the control parameter, the rotation speed of the fan is controlled so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range; The control parameters currently used to control the operation of the fan are obtained, including: Acquiring operating parameters of the engine when it is running, wherein the operating parameters include a speed and a load of the engine and a target vehicle speed corresponding to the speed and the load; Based on a pre-stored first correspondence between vehicle speed and wind speed, determining a wind speed corresponding to the target vehicle speed as an expected wind speed; Based on a pre-stored second correspondence between the rotation speed and the wind speed, acquiring a target rotation speed corresponding to the desired wind speed, wherein the control parameter includes the desired wind speed and the target rotation speed; Alternatively, obtain the control parameters currently used to control the operation of the fan, including: Extracting the desired wind speed carried in the control instruction from the received control instruction; Based on a pre-stored second correspondence between the rotation speed and the wind speed, a target rotation speed corresponding to the expected wind speed is acquired, wherein the control parameter includes the expected wind speed and the target rotation speed.

2. The method according to claim 1, characterized in that Before obtaining the control parameters currently used to control the operation of the fan, the method further includes: Acquire multiple sets of rotational speeds of the fan and wind speeds sensed by the wind speed sensor, wherein the rotational speed and wind speed in each set of data are collected in the same period of time; According to the rotation speeds of the plurality of wind fans and the wind speeds sensed by the wind speed sensors, a corresponding relationship between the rotation speeds and the wind speeds is established as a second corresponding relationship.

3. The method according to claim 1, characterized in that Based on the control parameter, the speed of the fan is controlled, including: Based on the control parameters, the rotation speed of the fan is controlled by a PID control algorithm.

4. The method according to claim 1, characterized in that: Based on the control parameter, the speed of the fan is controlled, including: The fan is controlled to operate at a target speed in the control parameters.

5. The method according to claim 1, characterized in that The method further comprises: When the duration that the difference between the actual wind speed and the expected wind speed is not within the preset range exceeds a set duration, an alarm prompt message is issued.

6. A fan control device for a test bench, characterized in that: The device comprises: an acquisition unit, configured to acquire a control parameter currently used to control the operation of a fan, wherein the fan is used to blow air to an engine on a test bench, and a wind speed sensor for detecting wind speed is provided on the engine or the test bench; A control unit, configured to control the rotation speed of the fan based on the control parameter so that the difference between the actual wind speed detected by the wind speed sensor and the expected wind speed in the control parameter is within a preset range; The acquisition unit is further used to acquire operating parameters of the engine when it is running, wherein the operating parameters include the engine speed, load, and target vehicle speed corresponding to the speed and load; based on a pre-stored first correspondence between vehicle speed and wind speed, determine the wind speed corresponding to the target vehicle speed as the expected wind speed; based on a pre-stored second correspondence between speed and wind speed, acquire the target speed corresponding to the expected wind speed, wherein the control parameters include the expected wind speed and the target speed; Alternatively, the acquisition unit is also used to extract the expected wind speed carried in the received control instruction; based on a pre-stored second correspondence between the rotational speed and the wind speed, obtain a target rotational speed corresponding to the expected wind speed, wherein the control parameters include the expected wind speed and the target rotational speed.

7. A control device, characterized in that: The control device comprises a processor and a memory coupled to each other, wherein a computer program is stored in the memory. When the computer program is executed by the processor, the control device executes the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 5.

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