CN117627774A - Control method, device, engine simulation equipment and storage medium of plateau bench - Google Patents

Abstract

The invention provides a control method and a device for a plateau bench, engine simulation equipment and a storage medium, wherein the plateau bench comprises a supercharger, a bypass valve and an opening controller for adjusting the opening of the bypass valve, and two ends of the bypass valve are respectively communicated with the supercharger and the ambient atmosphere, and the method comprises the following steps: obtaining the simulated altitude of the plateau bench; determining a target inlet and outlet differential pressure of the bypass valve based on the simulated altitude; and generating a control instruction of the opening controller based on the target inlet-outlet pressure difference, and adjusting the opening of the bypass valve to a target opening in response to the control instruction. According to the invention, the opening of the bypass valve is adjusted to the target opening in response to the control instruction, so that the automatic adjustment of the opening of the bypass valve is realized, no human intervention is needed, the automation of the adjustment of the opening of the bypass valve is improved, meanwhile, the human adjustment error is eliminated, and the accuracy of the target opening is further improved.

Description

Control method, device, engine simulation equipment and storage medium of plateau bench

Technical field

The invention is in the technical field of engine simulation, and specifically relates to a plateau bench control method, device, engine simulation equipment and storage medium.

Background technique

In high-altitude environments, due to the decrease in oxygen content in the air, the air-fuel ratio of diesel engines will deteriorate, which will affect performance including fuel consumption, power, emissions, etc. Therefore, major diesel engine manufacturers or OEM manufacturers will arrange plateau field environment tests. Some manufacturers are Get rid of the plateau test window period and spend huge sums of money to build plateau test benches.

The plateau bench seals the intake system of the diesel engine and reduces the intake pressure to simulate the intake conditions of a high-altitude environment. However, the external environment of the bench remains plain, which leads to a problem: supercharger bypass. The principle is to introduce the supercharger outlet pressure into the bypass valve through the rubber tube. The pressure difference on both sides of the diaphragm spring in the bypass valve drives the actuator. This pressure difference is the pressure difference between the supercharger outlet pressure and the atmospheric pressure. When simulating the plateau bench, the bypass valve is exposed to normal air pressure. Assuming that the simulation is 70kPa altitude, then the compressor outlet pressure is the true value of the plateau environment, but the bench ambient atmospheric pressure (100kPa) is higher than the true value of the plateau (70kPa). 30kPa higher. In this way, the diaphragm spring pressure difference is reduced by 30kPa, and the opening of the bypass valve is smaller than the theoretical opening. There are two ways to solve this problem, one is to lower the atmospheric pressure side by 30kPa, and the other is to increase the supercharger outlet by 30kPa. The method used in the existing technology is to compensate for the corresponding altitude pressure difference through the height difference of the liquid in the U-shaped tube. Before the plateau bench test, the liquid in the U-shaped tube is manually adjusted to the appropriate liquid level, so that the opening of the bypass valve is Theoretical opening. However, the manual adjustment method is inflexible and cannot automatically adjust with changes in altitude, and the adjustment error is large.

There is an urgent need to provide a plateau bench control method, device, engine simulation equipment and storage medium to solve the above technical problems.

Contents of the invention

In view of this, it is necessary to provide a plateau bench control method, device, engine simulation equipment and storage medium to solve the problem in the existing technology of artificially adjusting the U-shaped tube liquid level before testing on the plateau bench, resulting in Technical problems include inflexible adjustment methods and large adjustment errors.

On the one hand, the present invention provides a control method for a plateau bench. The plateau bench includes a supercharger, a bypass valve, and an opening controller for adjusting the opening of the bypass valve. Both ends are connected to the supercharger and the ambient atmosphere respectively. The control method of the plateau platform includes:

Obtain the simulated altitude of the plateau platform;

Determine the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude;

A control instruction of the opening degree controller is generated based on the target inlet and outlet pressure difference, and the opening degree of the bypass valve is adjusted to the target opening degree in response to the control instruction.

In some possible implementations, determining the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude includes:

Determine the theoretical ambient pressure of the environment where the bypass valve is located and the theoretical intake pressure of the bypass valve based on the simulated altitude;

The target inlet and outlet pressure differential is determined based on the theoretical intake pressure and the theoretical ambient pressure.

In some possible implementations, determining the theoretical environmental pressure of the environment where the bypass valve is located based on the simulated altitude includes:

Construct a corresponding relationship between the simulated altitude and the theoretical environmental pressure;

The theoretical environmental pressure is determined based on the simulated altitude and the corresponding relationship.

In some possible implementations, the bypass valve is a mechanical bypass valve or an electromagnetic bypass valve.

In some possible implementations, after determining the theoretical ambient pressure of the environment where the bypass valve is located and the theoretical intake pressure of the bypass valve based on the simulated altitude, the method further includes:

Obtain the last simulated altitude of the plateau platform;

Determine the altitude simulation mode of the plateau platform based on the last simulated altitude and the simulated altitude;

When the altitude simulation mode is an altitude rise simulation mode, the theoretical intake pressure is sent to the supercharger in real time;

When the altitude simulation mode is an altitude descent simulation mode, the theoretical intake pressure is delayed by a preset time and then sent to the supercharger.

In some possible implementations, determining the altitude simulation mode of the plateau platform based on the last simulated altitude and the simulated altitude includes:

When the last simulated altitude is less than the simulated altitude, the altitude simulation mode is the altitude rise simulation mode;

When the last simulated altitude is greater than the simulated altitude, the altitude simulation mode is the altitude descent simulation mode.

In some possible implementations, the preset delay time is 5S to 10S.

On the other hand, the present invention also provides a control device for a plateau platform. The plateau platform includes a supercharger, a bypass valve, and an opening controller for adjusting the opening of the bypass valve. The bypass valve Both ends of the valve are connected to the supercharger and the ambient atmosphere respectively. The control device of the plateau platform includes:

A simulated altitude acquisition unit, used to acquire the simulated altitude of the plateau platform;

a target inlet and outlet pressure difference determination unit, configured to determine the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude;

A bypass valve opening adjustment unit is configured to generate a control instruction for the opening controller based on the target inlet and outlet pressure difference, and adjust the opening of the bypass valve to the target opening in response to the control instruction.

On the other hand, the present invention also provides a plateau bench, including a memory and a processor, wherein,

The memory is used to store programs;

The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps in the control method of the plateau platform described in any of the above possible implementations.

On the other hand, the present invention also provides a computer-readable storage medium. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, they can realize any of the above possible implementation methods. The steps in the plateau bench control method described in .

The beneficial effect of adopting the above embodiment is that the control method of the plateau bench provided by the present invention first obtains the simulated altitude of the plateau bench, and then determines the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude to ensure the target inlet and outlet pressure difference. Adapted to the simulated altitude, the accuracy of the target opening of the bypass valve is improved. Moreover, the control instruction of the opening controller is generated based on the target inlet and outlet pressure difference, and the opening of the bypass valve is adjusted to the target opening in response to the control instruction, thereby realizing automatic adjustment of the opening of the bypass valve without human intervention, thus improving the efficiency of the opening. The automation of bypass valve opening adjustment simultaneously eliminates manual adjustment errors and further improves the accuracy of the target opening.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an embodiment of partial components of the plateau platform provided by the present invention;

Figure 2 is a schematic flow chart of an embodiment of the control method of the plateau platform provided by the present invention;

Figure 3 is a schematic flow diagram of an embodiment of S202 in Figure 2 of the present invention;

Figure 4 is a schematic flow diagram of an embodiment of S301 in Figure 3 of the present invention;

Figure 5 is a schematic flowchart of an embodiment of activating theoretical intake pressure to a supercharger provided by the present invention;

Figure 6 is a schematic structural diagram of an embodiment of the control device of the plateau platform provided by the present invention;

Figure 7 is a schematic structural diagram of an embodiment of the engine simulation equipment provided by the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this disclosure illustrate operations implemented in accordance with some embodiments of the invention. It should be understood that the operations of the flowchart may be implemented out of sequence, and steps without logical context may be implemented in reverse order or simultaneously. In addition, those skilled in the art can add one or more other operations to the flow chart and remove one or more operations from the flow chart under the guidance of the present invention. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and/or processor systems and/or microcontroller systems.

Reference herein to "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

The present invention provides a control method, device, engine simulation equipment and storage medium for a plateau bench, which are described separately below.

Figure 1 is a schematic structural diagram of some parts of the plateau bench provided by the embodiment of the present invention. As shown in Figure 1, the plateau bench includes a supercharger, a bypass valve and an opening controller for adjusting the opening of the bypass valve. , both ends of the bypass valve are connected to the supercharger and the ambient atmosphere respectively.

It should be noted that the bypass valve and the opening controller can be independent devices or integrated devices.

In order to improve the integration of the plateau bench, in a specific embodiment of the present invention, the bypass valve and the opening controller are integrated AVU valves (Air Valve Unit, air valve unit), and the AVU valve is an automatic control valve. , mainly used to regulate fluid flow, and its working principle is based on the regulating device (ie, the bypass valve in the embodiment of the present invention) and the controller (ie, the opening controller in the embodiment of the present invention). The regulating device usually includes a sensor and an actuator The sensor is used to measure the flow or pressure of the fluid and transmit these data to the controller. The controller generates control instructions and the actuator changes the opening of the valve based on the control instructions.

It should also be noted that the bypass valve in the embodiment of the present invention may be a mechanical bypass valve or an electromagnetic bypass valve.

When the bypass valve is a mechanical bypass valve, it is also necessary to set up an opening adjustment actuator that can adjust the opening of the mechanical bypass valve. The opening adjustment actuator responds to the control command and generates execution actions to adjust the opening of the mechanical bypass valve. .

When the bypass valve is an electromagnetic bypass valve, it can directly respond to the control command to adjust its own opening.

Figure 2 is a schematic flow diagram of an embodiment of the control method of the plateau platform provided by the present invention. As shown in Figure 2, the control method of the plateau platform includes:

S201. Obtain the simulated altitude of the plateau platform;

S202. Determine the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude;

S203. Generate a control instruction for the opening controller based on the target inlet and outlet pressure difference, and adjust the opening of the bypass valve to the target opening in response to the control instruction.

Compared with the existing technology, the control method of the plateau bench provided by the embodiment of the present invention first obtains the simulated altitude of the plateau bench, and then determines the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude to ensure the target inlet and outlet pressure difference. Adapted to the simulated altitude, the accuracy of the target opening of the bypass valve is improved. Moreover, the control instruction of the opening controller is generated based on the target inlet and outlet pressure difference, and the opening of the bypass valve is adjusted to the target opening in response to the control instruction, thereby realizing automatic adjustment of the opening of the bypass valve without human intervention, thus improving the efficiency of the opening. The automation of bypass valve opening adjustment simultaneously eliminates manual adjustment errors and further improves the accuracy of the target opening.

Among them, the simulated altitude should be determined and obtained based on the simulation requirements of the plateau bench.

In some embodiments of the present invention, as shown in Figure 3, step S202 includes:

S301. Determine the theoretical environmental pressure of the environment where the bypass valve is located and the theoretical inlet pressure of the bypass valve based on the simulated altitude;

S302. Determine the target inlet and outlet pressure difference based on the theoretical inlet pressure and theoretical ambient pressure.

The embodiment of the present invention determines the target inlet and outlet pressure difference based on the theoretical environmental pressure and the actual inlet pressure determined based on the simulated altitude, thereby eliminating the bypass valve pressure caused when the plateau environment is simulated on a plateau bench and the bypass valve is in a plain environment. The technical problem of the difference being less than the theoretical pressure difference improves the accuracy of the determined target inlet and outlet pressure difference.

In the specific embodiment of the present invention, if the altitude of 70kPa is simulated and the actual inlet pressure is 300kPa, then the theoretical ambient pressure is 70kPa, not atmospheric pressure (100kPa), then the target inlet and outlet pressure difference is 300kPa-70kPa=230kPa, It is not 300kPa-100kPa=200kPa.

In some embodiments of the present invention, as shown in Figure 4, step S301 includes:

S401. Construct a corresponding relationship between simulated altitude and theoretical environmental pressure;

S402. Determine the theoretical environmental pressure based on the simulated altitude and corresponding relationship.

By constructing the corresponding relationship between the simulated altitude and the theoretical environmental pressure, the embodiment of the present invention can quickly determine the theoretical environmental pressure based on the simulated altitude, thereby improving the adjustment efficiency of the target opening of the bypass valve.

Among them, the corresponding relationship can be stored in functional relationship or in table form.

In a specific embodiment of the present invention, the corresponding relationship between simulated altitude and theoretical environmental pressure is stored in table form, as shown in Table 1:

Table 1 Correspondence between simulated altitude and theoretical environmental pressure

When testing on a plateau bench, it is often necessary to simulate the target inlet and outlet pressure differences of the bypass valve at different altitudes, that is, the supercharger is required to simulate the outlet pressure at different simulated altitudes. As for the intake pressure adjustment of the plateau bench, it takes 5-10 seconds from receiving the instruction to adjusting to the target intake pressure. When the altitude decreases, it means that the intake pressure increases and the fuel injection volume increases; if the boost pressure value is directly raised to the target value, the injector will increase the fuel injection volume according to the boost pressure. The large fuel injection volume requires There will be more air, but at this time the intake pressure is low, and the supercharger can only be forced to increase the speed, which may lead to overspeeding. In order to solve this technical problem, in some embodiments of the present invention, as shown in Figure 5, after step S301, it also includes:

S501. Obtain the last simulated altitude of the plateau platform;

S502. Determine the altitude simulation mode of the plateau platform based on the last simulated altitude and the simulated altitude;

S503. When the altitude simulation mode is the altitude rise simulation mode, send the theoretical intake pressure to the supercharger in real time;

S504. When the altitude simulation mode is the altitude descent simulation mode, the theoretical intake pressure is delayed by a preset time and then sent to the supercharger.

In the embodiment of the present invention, when the altitude simulation mode is the altitude descent simulation mode, the theoretical intake pressure is delayed by a preset time and then sent to the supercharger, which can provide time for the outlet pressure of the supercharger to increase and avoid increasing the outlet pressure. Add more oil during the process to eliminate the risk of overspeeding of the supercharger and improve the safety of the plateau bench during the test simulation process.

In a specific embodiment of the present invention, step S502 includes:

When the last simulated altitude is less than the simulated altitude, the altitude simulation mode is the altitude rising simulation mode;

When the last simulated altitude is greater than the simulated altitude, the altitude simulation mode is the altitude descent simulation mode.

It should be understood that the preset delay time should be set according to the device parameters of the supercharger. In specific embodiments of the present invention, the preset delay time is 5S to 10S.

In some embodiments of the present invention, the control method of the plateau bench can be performed in an automotive motion software tool such as INCA software.

In summary, the embodiment of the present invention determines the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude, and controls the opening of the bypass valve to adjust to the target opening through the control instructions generated by the opening controller, without the need for frequent manual adjustments. operation, which can improve the accuracy and flexibility of target opening. Furthermore, determining the target inlet and outlet pressure difference based on the theoretical inlet pressure and theoretical environmental pressure can adapt the pressure on the bypass valve diaphragm to the simulated altitude, so that the bypass valve can be opened to the correct opening at the simulated altitude. , which improves the accuracy of plateau bench simulation. Furthermore, when the altitude simulation mode is the altitude descent simulation mode, the embodiment of the present invention delays sending the theoretical intake pressure to the supercharger, which can ensure the safety of the supercharger during the plateau bench simulation process.

In order to better implement the control method of the plateau bench in the embodiment of the present invention, based on the control method of the plateau bench, correspondingly, the embodiment of the present invention also provides a control device of the plateau bench. It includes a supercharger, a bypass valve and an opening controller used to adjust the opening of the bypass valve. Both ends of the bypass valve are connected to the supercharger and the ambient atmosphere respectively. As shown in Figure 6, the control device of the plateau bench 600 includes:

The simulated altitude acquisition unit 601 is used to obtain the simulated altitude of the plateau platform;

The target inlet and outlet pressure difference determination unit 602 is used to determine the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude;

The bypass valve opening adjustment unit 603 is configured to generate a control instruction for the opening controller based on the target inlet and outlet pressure difference, and adjust the opening of the bypass valve to the target opening in response to the control instruction.

The control device 600 of the plateau platform provided in the above embodiment can implement the technical solution described in the embodiment of the control method of the plateau platform. The specific implementation principles of each of the above modules or units can be found in the embodiment of the control method of the plateau platform. The corresponding content will not be repeated here.

As shown in Figure 7, the present invention also provides an engine simulation device 700. The engine simulation device 700 includes a processor 701 , a memory 702 and a display 703 . FIG. 7 illustrates only some components of the engine simulation device 700, but it should be understood that implementation of all illustrated components is not required and more or fewer components may alternatively be implemented.

The memory 702 may be an internal storage unit of the engine simulation device 700 in some embodiments, such as a hard disk or memory of the engine simulation device 700 . In other embodiments, the memory 702 may also be an external storage device of the engine simulation device 700 , such as a plug-in hard disk, a smart memory card (Smart MediaCard, SMC), or a secure digital (SD) equipped on the engine simulation device 700 . ) card, Flash Card, etc.

Further, the memory 702 may also include both an internal storage unit of the engine simulation device 700 and an external storage device. The memory 702 is used to store application software and various types of data installed in the engine simulation device 700 .

In some embodiments, the processor 701 may be a central processing unit (CPU), a microprocessor or other data processing chip, used to run program codes or process data stored in the memory 702, such as in the present invention. Control method of plateau bench.

In some embodiments, the display 703 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode, organic light-emitting diode) touch device, etc. The display 703 is used to display information on the engine simulation device 700 and to display a visual user interface. The components 701-703 of the engine simulation device 700 communicate with each other via a system bus.

In some embodiments of the present invention, when the processor 701 executes the control program of the plateau platform in the memory 702, the following steps may be implemented:

Obtain the simulated altitude of the plateau platform;

Determine the target inlet and outlet pressure difference of the bypass valve based on the simulated altitude;

The control instruction of the opening controller is generated based on the target inlet and outlet pressure difference, and the opening of the bypass valve is adjusted to the target opening in response to the control instruction.

It should be understood that when the processor 701 executes the control program of the plateau platform in the memory 702, in addition to the above functions, it can also implement other functions. For details, please refer to the previous description of the relevant method embodiments.

Further, the embodiment of the present invention does not specifically limit the type of the engine simulation device 700 mentioned. The engine simulation device 700 can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop Portable engine simulation equipment such as laptop computers. Exemplary embodiments of portable engine simulation devices include, but are not limited to, portable engine simulation devices equipped with IOS, android, Microsoft, or other operating systems. The above-mentioned portable engine simulation device may also be other portable engine simulation devices, such as a laptop computer (laptop) with a touch-sensitive surface (such as a touch panel). It should also be understood that in other embodiments of the present invention, the engine simulation device 700 may not be a portable engine simulation device, but a desktop computer with a touch-sensitive surface (eg, a touch panel).

Correspondingly, embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium is used to store computer-readable programs or instructions. When the programs or instructions are executed by the processor, the above method embodiments can be implemented. Provides the control method steps or functions of the plateau gantry.

Those skilled in the art can understand that all or part of the process of implementing the methods of the above embodiments can be completed by instructing relevant hardware (such as processors, controllers, etc.) through a computer program. The computer program can be stored in a computer-readable storage medium. . Among them, the computer-readable storage media is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.

The control method, device, engine simulation equipment and storage medium of the plateau bench provided by the present invention have been introduced in detail above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only It is used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of the present invention. In summary, this specification The contents should not be construed as limitations of the invention.

Claims (10)

1. The control method of the plateau bench is characterized in that the plateau bench comprises a supercharger, a bypass valve and an opening controller for adjusting the opening of the bypass valve, two ends of the bypass valve are respectively communicated with the supercharger and the ambient atmosphere, and the control method of the plateau bench comprises the following steps:

obtaining the simulated altitude of the plateau bench;

determining a target inlet and outlet differential pressure of the bypass valve based on the simulated altitude;

and generating a control instruction of the opening controller based on the target inlet-outlet pressure difference, and adjusting the opening of the bypass valve to a target opening in response to the control instruction.

2. The method of claim 1, wherein said determining a target inlet and outlet differential pressure of the bypass valve based on the simulated altitude comprises:

determining a theoretical ambient pressure of an environment in which the bypass valve is located and a theoretical intake pressure of the bypass valve based on the simulated altitude;

the target in-out differential pressure is determined based on the theoretical intake pressure and the theoretical ambient pressure.

3. The method of claim 2, wherein determining a theoretical ambient pressure of an environment in which the bypass valve is located based on the simulated altitude comprises:

constructing a corresponding relation between the simulated altitude and the theoretical ambient pressure;

the theoretical ambient pressure is determined based on the simulated altitude and the correspondence.

4. The method of claim 1, wherein the bypass valve is a mechanical bypass valve or an electromagnetic bypass valve.

5. The control method of the altitude bench according to claim 2, further comprising, after said determining a theoretical ambient pressure of an environment in which said bypass valve is located and a theoretical intake pressure of said bypass valve based on said simulated altitude:

acquiring the last simulated altitude of the plateau bench;

determining an altitude simulation mode of the altitude platform based on the last simulated altitude and the simulated altitude;

when the altitude simulation mode is an altitude rising simulation mode, sending the theoretical intake pressure to the supercharger in real time;

and when the altitude simulation mode is an altitude decrease simulation mode, the theoretical air inlet pressure is delayed for a preset time and then sent to the supercharger.

6. The method of claim 5, wherein said determining an altitude simulation mode of the altitude bench based on the last simulated altitude and the simulated altitude comprises:

when the last simulated altitude is less than the simulated altitude, the altitude simulation mode is the altitude elevation simulation mode;

when the last simulated altitude is greater than the simulated altitude, the altitude simulation mode is the altitude-down simulation mode.

7. The method according to claim 5, wherein the delay preset time is 5S to 10S.

8. The utility model provides a controlling means of plateau rack, its characterized in that, the plateau rack includes booster, bypass valve and is used for adjusting the aperture controller of bypass valve aperture, the both ends of bypass valve communicate respectively booster and ambient atmosphere, the controlling means of plateau rack includes:

the simulated altitude acquisition unit is used for acquiring the simulated altitude of the plateau bench;

a target in-out differential pressure determining unit for determining a target in-out differential pressure of the bypass valve based on the simulated altitude;

and a bypass valve opening adjustment unit for generating a control command of the opening controller based on the target in-out differential pressure, and adjusting the opening of the bypass valve to a target opening in response to the control command.

9. An engine simulation apparatus comprising a memory and a processor, wherein,

the memory is used for storing programs;

the processor, coupled to the memory, for executing the program stored in the memory to implement the steps in the control method of the altitude platform according to any one of the preceding claims 1 to 7.

10. A computer readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the control method of the plateau stage of any of the above claims 1 to 7.