Quasi-dynamic model construction method and device, computer equipment and storage medium

Abstract

The invention relates to a construction method and device of a quasi-dynamic model, computer equipment and a storage medium. The method comprises the following steps: determining topological information of a target fuel system according to modeling information of the target fuel system; the topological information comprises a fluid unit and a mechanical unit of the target fuel system, and an association relationship between the fluid unit and the mechanical unit; determining a quasi-dynamic model of the fluid unit according to the topological information, the modeling information and the basic control model; the basic control model is used for determining the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system. By comprehensively considering the coupling effect of fluid and machinery, more accurate system behavior description is performed on the target fuel system, so that the topological information of the target fuel system is more comprehensive, the accuracy of the topological information of the target fuel system is improved, and the accuracy of the constructed model of the target fuel system is improved.

Description

Technical Field

[0001] The present application relates to the technical field of model construction, and particularly to a method, apparatus, computer device, and storage medium for constructing a quasi-dynamic model. Background Art

[0002] In the development and verification process of an aero-engine fuel and lubricating oil system, modeling and simulation are indispensable key means. The fuel and lubricating oil system is an important subsystem in an aero-engine that undertakes functions such as fuel metering, geometric actuation, lubrication, and cooling. Efficient modeling and simulation can not only improve the design and operation and maintenance efficiency, but also effectively reduce costs and provide support for the optimization of each link.

[0003] In traditional technologies, modeling methods based on control volumes and modeling methods based on fluid networks are usually used. Among them, the modeling method based on control volumes divides the fuel and lubricating oil system into several control volumes, and the fluid parameters in each volume are described by equations of mass conservation, momentum conservation, and energy conservation; the modeling method based on fluid networks models each component in the fluid system as a one-dimensional element and connects them into a network, and performs simulation through connection relationships and fluid equations to achieve the coupled description of the overall system.

[0004] However, the traditional modeling method based on control volumes has the problem of being difficult to efficiently describe the overall behavior of complex systems, while the modeling method based on fluid networks has poor simulation capabilities for multi-physical fields. Traditional modeling methods cannot both take into account networked description and high-precision "mechanical-fluid" coupling to achieve automated modeling of the mechanism model of a component-level complex fuel system. Summary of the Invention

[0005] Based on this, it is necessary to provide a method, apparatus, computer device, and storage medium for constructing a quasi-dynamic model that can achieve networked description of a complex fuel system and high-precision "mechanical-fluid" coupling for the above technical problems.

[0006] In a first aspect, the present application provides a method for constructing a quasi-dynamic model, including:

[0007] Determine the topological information of the target fuel system according to the modeling information of the target fuel system; the topological information includes the fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0008] Determine the quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system.

[0009] In one embodiment, determining the topology information of the target fuel system according to the modeling information of the target fuel system includes:

[0010] Performing feature extraction on the modeling information to determine the topology matrix of the target fuel system;

[0011] Determining the topology information of the target fuel system according to the topology matrix.

[0012] In one embodiment, performing feature extraction on the modeling information to determine the topology matrix of the target fuel system includes:

[0013] Performing feature extraction on the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determining the connection relationship between the fluid units and the mechanical units;

[0014] Determining the topology matrix of the target fuel system according to the connection relationship between the fluid units and the mechanical units.

[0015] In one embodiment, the modeling information includes the mechanical parameter information of the target fuel system. Determining the quasi-dynamic model of the fluid unit according to the topology information, the modeling information, and the basic control model includes:

[0016] Determining the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model;

[0017] Determining the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topology information, and the basic control model.

[0018] In one embodiment, the fluid unit includes fluid nodes and fluid components. Determining the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topology information, and the basic control model includes:

[0019] Determining the associated mechanical units and associated fluid nodes associated with the fluid component according to the association relationship in the topology information;

[0020] Forming the initial quasi-dynamic model of the fluid component according to the associated mechanical unit, the associated fluid node, and the basic control model;

[0021] Substituting the mechanical motion parameters of the associated mechanical unit and the associated fluid node into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0022] In one of the embodiments, the basic control model includes: a dynamic quantum model of a fluid branch, a mass conservation sub-model of a fluid node, a dynamic quantum model of a mechanical unit, and a flow quantum model of a mechanical unit.

[0023] In a second aspect, the present application further provides a device for constructing a quasi-dynamic model, including:

[0024] A first determination module, configured to determine topological information of the target fuel system according to modeling information of the target fuel system; the topological information includes fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0025] A second determination module, configured to determine a quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit, and the influence on the fuel system.

[0026] In a third aspect, the present application further provides a computer device, including a memory and a processor, where the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0027] Determine the topological information of the target fuel system according to the modeling information of the target fuel system; the topological information includes fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0028] Determine a quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit, and the influence on the fuel system.

[0029] In a fourth aspect, the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0030] Determine the topological information of the target fuel system according to the modeling information of the target fuel system; the topological information includes fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0031] Determine a quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit, and the influence on the fuel system.

[0032] In a fifth aspect, the present application also provides a computer program product, including a computer program which, when executed by a processor, implements the following steps:

[0033] Determine the topology information of the target fuel system according to the modeling information of the target fuel system; the topology information includes the fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0034] Determine the quasi-dynamic model of the fluid unit according to the topology information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system.

[0035] The above method, device, computer device, and storage medium for constructing a quasi-dynamic model determine the topology information of a target fuel system according to the modeling information of the target fuel system; the topology information includes the fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units; determine the quasi-dynamic model of the fluid unit according to the topology information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system. By comprehensively considering the coupling effect between the fluid and the mechanical, a more accurate system behavior description of the target fuel system is carried out, making the topology information of the target fuel system more comprehensive, thereby improving the accuracy of the topology information of the target fuel system, and thus improving the accuracy of the constructed model of the target fuel system. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0037] Figure 1 It is an application environment diagram of the method for constructing a quasi-dynamic model in an embodiment;

[0038] Figure 2 It is a flowchart of the method for constructing a quasi-dynamic model in an embodiment;

[0039] Figure 3 It is a flowchart of the method for constructing a quasi-dynamic model in another embodiment;

[0040] Figure 4 It is a structural diagram of a target fuel system in an embodiment;

[0041] Figure 5 It is a topological structure diagram of a target fuel system in an embodiment;

[0042] Figure 6 It is a schematic flowchart of a method for constructing a quasi-dynamic model in another embodiment;

[0043] Figure 7 It is a schematic flowchart of a method for constructing a quasi-dynamic model in another embodiment;

[0044] Figure 8 It is a schematic flowchart of a method for constructing a quasi-dynamic model in another embodiment;

[0045] Figure 9 It is a schematic flowchart of a method for constructing a quasi-dynamic model in another embodiment;

[0046] Figure 10 It is a structural block diagram of a device for constructing a quasi-dynamic model in an embodiment. Detailed implementation manners

[0047] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] The method for constructing a quasi-dynamic model provided by the embodiments of the present application can be applied to an application environment as shown in Figure 1 The computer device can be a terminal, and its internal structure diagram can be as shown in Figure 1As shown in the figure. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner. The wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC), or other technologies. When the computer program is executed by the processor, it is used to implement a method for constructing a quasi-dynamic model. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0049] Those skilled in the art can understand that Figure 1 the structure shown in the figure is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0050] In one embodiment, as Figure 2 shown, a method for constructing a quasi-dynamic model is provided. Taking the terminal in Figure 1 as an example for description, it includes:

[0051] S201, according to the modeling information of the target fuel system, determine the topological information of the target fuel system; the topological information includes the fluid unit and the mechanical unit of the target fuel system, and the association relationship between the fluid unit and the mechanical unit.

[0052] Among them, the modeling information can be system images or text information.

[0053] In an embodiment of the present application, a user inputs modeling information of a target fuel system to a terminal. When the modeling information is a system image, image recognition can be performed on the system image to determine system components included in the system image. Further, the system components are screened to remove useless or interfering components in the system components, and the screened system components are obtained. Then, feature extraction is performed on the screened system components to determine fluid units and mechanical units of the target fuel system, as well as the association relationship between the fluid units and the mechanical units. When the modeling information is text information, the text information is converted into information in a preset format, and then the fluid units and mechanical units of the target fuel system, as well as the association relationship between the fluid units and the mechanical units, are extracted from the converted text information.

[0054] Optionally, the fluid unit may include fluid nodes and fluid components, and the association relationship between the fluid unit and the mechanical unit may include fluid association, mechanical relationship, and fluid branch. Among them, a fluid node represents a connection point formed by the convergence of fluid components in a fluid association form; a fluid component represents a control volume with equal inlet and outlet cross-sectional flows in the fuel system, having two fluid ports fluidly associated with different fluid nodes respectively, and having at most one mechanical port mechanically associated with the mechanical unit; the mechanical unit is a mechanical moving body in the fuel system and can be mechanically associated with fluid nodes and fluid components; the fluid association represents a fluid connection relationship; the mechanical association represents the influence relationship of the fluid node on the mechanical unit and the mechanical unit on the fluid component; the fluid branch represents a fluid component and a control volume composed of fluid components in a series relationship or a parallel relationship, and the fluid branch directly composed of one fluid component is called a basic fluid branch.

[0055] S202. Determine the quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system.

[0056] In an embodiment of the present application, the initial quasi-dynamic model of the fluid unit can be determined according to the topological information and the basic control model. Further, the quasi-dynamic model of the fluid unit is determined according to the modeling information and the initial quasi-dynamic model. Optionally, the basic control model can be an energy conservation model, a momentum model, etc.

[0057] In the method for constructing the above quasi-dynamic model, according to the modeling information of the target fuel system, the topological information of the target fuel system is determined; the topological information includes the fluid units and mechanical units of the target fuel system, as well as the association relationships between the fluid units and mechanical units; according to the topological information, modeling information, and basic control model, the quasi-dynamic model of the fluid unit is determined; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the impact on the fuel system. By comprehensively considering the coupling effect between the fluid and the mechanical, a more accurate system behavior description of the target fuel system is carried out, making the topological information of the target fuel system more comprehensive, thereby improving the accuracy of the topological information of the target fuel system, and thus improving the accuracy of the constructed model of the target fuel system.

[0058] In one embodiment, an implementation manner of the above S201 is provided, as Figure 3 shown, the above "determining the topological information of the target fuel system according to the modeling information of the target fuel system" includes:

[0059] S301, performing feature extraction on the modeling information to determine the topological matrix of the target fuel system.

[0060] In the embodiments of the present application, the modeling information may include the structural schematic diagram of the target fuel system. Exemplarily, the structural schematic diagram of the target fuel system may be as Figure 4 shown. Analyze and process the positions of the fluid structure and mechanical structure in the structural schematic diagram of the target fuel system, and extract the structural features in the structural schematic diagram. The structural features may include the positions of the components in the target fuel system, so as to determine the topological structure diagram and topological matrix of the target fuel system according to the structural features. Optionally, the structural schematic diagram of the target fuel system may be as Figure 4 shown, and the topological structure diagram corresponding to this structural schematic diagram may be as Figure 5 shown.

[0061] As another alternative implementation manner, the modeling information may include the text description of the target fuel system. Screen the text description of the structural features, remove the interference information in the text description, and determine the structural features of the target fuel system. The structural features may include the positions of the components in the target fuel system, so as to determine the topological structure diagram and topological matrix of the target fuel system according to the structural features.

[0062] Optionally, as Figure 5 shown, the fluid nodes in the topological structure diagram may be represented as circles, the fluid components may be represented as rectangles, the mechanical units may be represented as diamonds, the fluid connection relationship between the fluid nodes and the fluid components may be represented as a solid line with a single arrow, and the influence relationship between the fluid unit and the mechanical unit may be represented as a dashed line with a single arrow.

[0063] Optionally, the topology matrix of the target fuel system includes a first topology matrix and a second topology matrix. The first topology matrix can be used to characterize the association relationships between fluid units, and the second topology matrix can be used to characterize the association relationships between fluid units and mechanical units.

[0064] Optionally, as Figure 6 shown, the above "performing feature extraction on the modeling information to determine the topology matrix of the target fuel system" includes:

[0065] S401, performing feature extraction on the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determining the connection relationships between the fluid units and the mechanical units.

[0066] Among them, the connection relationships between the fluid units and the mechanical units include the flow directions between the fluid units and the influence relationships between the fluid units and the mechanical units.

[0067] In the embodiments of the present application, the fluid units include fluid components and fluid nodes. Performing feature extraction on the modeling information to determine the quantities of the fluid components, fluid nodes and mechanical units in the topology structure diagram, the positions of each component in the topology structure diagram, and the association relationships between each component. Further, the fluid components, fluid nodes and mechanical units, and the association relationships between each component can be described according to the graph and the lines with arrows to form a topology structure diagram.

[0068] Optionally, the flow direction between the fluid node and the fluid component can be described by a solid line with a single arrow; the influence relationship between the fluid node and the mechanical unit can be described by a dashed line with a single arrow. Exemplarily, as Figure 5 shown, the topology structure diagram includes 5 fluid components, 6 fluid nodes and 2 mechanical units. Each branch where a fluid component is located is a basic fluid branch, that is Figure 5 it includes 5 basic fluid branches. Among them, the flow directions between the fluid units are consistent with the pointing directions of the solid lines with single arrows, and the influence relationships between the fluid units and the mechanical units are consistent with the pointing directions of the dashed lines with single arrows. For example, mechanical unit 2 has an impact on fluid components 1, 2, 3 and 4, fluid components 1 and 2 have an impact on mechanical unit 1, and mechanical unit 1 has an impact on fluid component 5.

[0069] S402, determining the topology matrix of the target fuel system according to the connection relationships between the fluid units and the mechanical units.

[0070] In the embodiments of the present application, the topology matrix of the target fuel system includes a first topology matrix D a (m*n) and a second topology matrix D b(n * l), where m is the number of fluid components and also the number of basic fluid branches, n is the number of fluid nodes, and l is the number of mechanical units. Optionally, D a If the matrix coefficient in the i-th row and j-th column of D a is 1, it indicates that the j-th fluid node is the downstream node of the i-th fluid component; D b If the matrix coefficient in the i-th row and j-th column of D b is -1, it indicates that the j-th fluid node is the upstream node of the i-th fluid component; D

[0071] Exemplarily, Figure 5 The corresponding D a of the topology structure diagram can be expressed as Equation 1, D b and can be expressed as Equation 2:

[0072] (Equation 1)

[0073] (Equation 2)

[0074] S302. Determine the topology information of the target fuel system according to the topology matrix.

[0075] In the embodiments of the present application, according to the topology matrix, determine the topology information corresponding to each fluid node, determine the upstream fluid components and / or downstream fluid components of each fluid node according to the first topology matrix, and determine the flow direction between each fluid node and the mechanical unit according to the second topology matrix.

[0076] In the above application embodiments, according to the modeling information of the target fuel system, first determine the topology structure diagram of the target fuel system, and then determine the topology information of the target fuel system according to the topology structure diagram, so that the flow direction and upstream and downstream relationships in the target fuel system can be obtained more accurately.

[0077] In one embodiment, an implementation manner of the above S202 is provided. The modeling information includes the mechanical parameter information of the target fuel system, such as Figure 7 As shown, the above "determine the quasi-dynamic model of the fluid unit according to the topology information, modeling information, and basic control model" includes:

[0078] S501. Determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model.

[0079] Among them, the basic control model includes: the momentum sub-model of the fluid branch, the mass conservation sub-model of the fluid node, the momentum sub-model of the mechanical unit, and the flow rate sub-model of the mechanical unit. Optionally, the momentum sub-model of the fluid branch can be as shown in Equation 1, the mass conservation sub-model of the fluid node can be as shown in Equation 2, the momentum sub-model of the mechanical unit can be as shown in Equation 3, and the flow rate sub-model in the mechanical unit can be as shown in Equation 4:

[0080] (Equation 1)

[0081] (Equation 2)

[0082] (Equation 3)

[0083] (Equation 4)

[0084] Among them, the topological structure diagram corresponding to the above basic control model includes m basic fluid branches, n fluid nodes, and l mechanical units. The influence of the displacement of the mechanical moving body is additionally considered in Equation 1. In Equation 1, , represents the volume flow rate of the i-th basic fluid branch, represents the pressure of the upstream node of the i-th basic fluid branch, represents the pressure of the downstream node of the i-th basic fluid branch, represents the displacement of the moving body of the associated mechanical unit of the i-th basic fluid branch; the influence of the movement of the mechanical unit on the inflow and outflow of the fluid node is additionally considered in Equation 2. In Equation 2, , represents the volume flow rate of the i-th basic fluid branch, , represents the volume flow rate flowing from the j-th fluid node to the outside, represents the volume flow rate of the k-th mechanical unit flowing into the j-th fluid node; Equation 3 is used to describe the relationship between the force and displacement of the mechanical moving body. In Equation 3, , p j represents the pressure of the j-th fluid node, represents the displacement of the moving body of the k-th mechanical unit.

[0085] In the embodiments of the present application, by introducing two assumptions of "incompressible liquid" and "moving body in force balance state", the mechanical parameter information is substituted into the basic control model to obtain the mechanical motion parameters.

[0086] Optionally, ignoring the non-steady term of the momentum sub-model of the fluid branch, according to Equation 1, we can obtain ; Ignoring the unsteady terms of the mass conservation sub-model of the fluid nodes, according to Equation 2, we can obtain , where L1 is the number of unknown velocities; ignoring the unsteady terms in the momentum sub-model of the mechanical unit, according to Equation 3, we can obtain , L2 is the number of unknown velocities plus unknown positions, A jk represents the acting area of node j on element k, c k is the spring stiffness, d k is the spring pre-tightening force, b jk is the element value of the j-th row and k-th column in matrix D b ; Further, ignoring the unsteady terms of the flow sub-model of the mechanical unit, we can obtain Equations 5 and 6:

[0087] (Equation 5)

[0088] (Equation 6)

[0089] S502. Determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, topological information, and the basic control model.

[0090] In the embodiment of the present application, according to the basic control model and topological information, an initial quasi-dynamic model is obtained. Further, substituting the mechanical motion parameters into the initial dynamic model, the quasi-dynamic model of the fluid unit is determined.

[0091] In the above application embodiment, according to the basic control model and the input mechanical parameter information, the mechanical motion parameters of the target fuel system are determined. Thus, according to the mechanical motion parameters, topological information, and the basic control model, the quasi-dynamic model of the fluid unit is determined, making the quasi-dynamic model more compatible with the target fuel system.

[0092] In one embodiment, an implementation manner of the above S502 is provided. The fluid unit includes fluid nodes and fluid components. As Figure 8 shown, the above "determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, topological information, and the basic control model" includes:

[0093] S601. Determine the associated mechanical units and associated fluid nodes associated with the fluid components according to the association relationship in the topological information.

[0094] In the embodiment of the present application, for each fluid unit, the associated mechanical units and associated fluid nodes associated with the fluid components are determined from the topological information. Exemplarily, Figure 5 the upstream fluid node of fluid component 1 in

[0095] S602: forming an initial quasi-dynamic model of the fluid component according to the associated mechanical units, the associated fluid nodes and the basic control model.

[0096] In the embodiment of the present application, the basic control model is combined to obtain the initial quasi-dynamic model and conservation relationship of each fluid component.

[0097] Optional, Figure 5 The initial quasi-dynamic models corresponding to the fluid nodes, fluid components and mechanical units in the example may include: ; ; ; ; ; ; ; ; ; ; ;as well as:

[0098] and

[0099] Among them, e is the coefficient constant in the flow formula, which is related to the density and the geometric shape of the throttle hole.

[0100] S603, substituting the mechanical motion parameters of the associated mechanical unit and the associated fluid node into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0101] In the embodiments of the present application, , , , , , , , , is an unknown number, and the mechanical motion parameters of the associated mechanical unit and the associated fluid node are substituted into the initial quasi-dynamic model of the above-mentioned fluid component to determine the quasi-dynamic model of the fluid component.

[0102] In the above application embodiment, the initial quasi-dynamic model of the fluid component is determined according to the correlation between the units of the target fuel system, and then the quasi-dynamic model of each fluid component is determined according to the mechanical motion parameters and the initial quasi-dynamic model, thereby improving the accuracy of the quasi-dynamic model.

[0103] In one embodiment, a method for constructing a complete quasi-dynamic model is provided, such as Figure 9 As shown, the above method includes:

[0104] S1, extract features from the modeling information to form a topological structure diagram of the target fuel system.

[0105] S2. Extract features from the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and to determine the connection relationships between the fluid units and the mechanical units.

[0106] S3. Determine the topology matrix of the target fuel system according to the connection relationships between the fluid units and the mechanical units.

[0107] S4. Determine the topology information of the target fuel system according to the topology matrix; the topology information includes the fluid units and mechanical units of the target fuel system, and the association relationships between the fluid units and the mechanical units.

[0108] S5. Determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model; the basic control model includes: the momentum sub-model of the fluid branch, the mass conservation sub-model of the fluid node, the momentum sub-model of the mechanical unit, and the flow rate sub-model of the mechanical unit.

[0109] S6. Determine the associated mechanical units and associated fluid nodes associated with the fluid components according to the association relationships in the topology information.

[0110] S7. Form an initial quasi-dynamic model of the fluid component according to the associated mechanical units, associated fluid nodes and the basic control model.

[0111] S8. Substitute the mechanical motion parameters of the associated mechanical units and associated fluid nodes into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0112] In the above method for constructing the quasi-dynamic model, according to the modeling information of the target fuel system, determine the topology information of the target fuel system; the topology information includes the fluid units and mechanical units of the target fuel system, and the association relationships between the fluid units and the mechanical units; according to the topology information, modeling information and basic control model, determine the quasi-dynamic model of the fluid unit; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system. By comprehensively considering the coupling effect between the fluid and the mechanical, a more accurate system behavior description of the target fuel system is carried out, making the topology information of the target fuel system more comprehensive, thereby improving the accuracy of the topology information of the target fuel system, and thus improving the accuracy of the constructed model of the target fuel system.

[0113] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless specifically stated herein, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in rotation with at least a part of other steps or steps or stages in other steps.

[0114] Based on the same inventive concept, an embodiment of the present application further provides a quasi-dynamic model construction device for implementing the above-mentioned quasi-dynamic model construction method. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more of the following quasi-dynamic model construction device embodiments can refer to the limitations on the quasi-dynamic model construction method in the above text, and will not be elaborated here.

[0115] In one embodiment, as Figure 10 shown, a quasi-dynamic model construction device is provided, including: a first determination module 10 and a second determination module 11, where:

[0116] The first determination module 10 is configured to determine the topological information of the target fuel system according to the modeling information of the target fuel system; the topological information includes the fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and mechanical units.

[0117] The second determination module 11 is configured to determine the quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system; the basic control model includes: a dynamic quantity sub-model of the fluid branch, a mass conservation sub-model of the fluid node, a dynamic quantity sub-model of the mechanical unit, and a flow quantity sub-model of the mechanical unit.

[0118] In one embodiment, the above-mentioned second determination module 11 includes: an extraction unit, a first determination unit, and a second determination unit, where:

[0119] The first determination unit is configured to perform feature extraction on the modeling information to determine the topological matrix of the target fuel system.

[0120] The second determination unit is configured to determine the topological information of the target fuel system according to the topological matrix.

[0121] In one embodiment, the above-mentioned first determination unit is specifically configured to perform feature extraction on the modeling information, determine the fluid unit and the mechanical unit corresponding to the modeling information, and determine the connection relationship between the fluid unit and the mechanical unit; according to the connection relationship between the fluid unit and the mechanical unit, determine the topological matrix of the target fuel system.

[0122] In one embodiment, the modeling information includes the mechanical parameter information of the target fuel system. The above-mentioned first determination module 10 includes: a third determination unit and a fourth determination unit, where:

[0123] The third determination unit is configured to determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model.

[0124] The fourth determination unit is configured to determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topological information, and the basic control model.

[0125] In one embodiment, the fluid unit includes fluid nodes and fluid components. The above-mentioned fourth determination unit is specifically configured to determine the associated mechanical unit and the associated fluid nodes associated with the fluid component according to the association relationship in the topological information; form the initial quasi-dynamic model of the fluid component according to the associated mechanical unit, the associated fluid nodes, and the basic control model; substitute the mechanical motion parameters of the associated mechanical unit and the associated fluid nodes into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0126] Each module in the above-mentioned quasi-dynamic model construction device can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor in the computer device in hardware form or independent of the processor, or stored in the memory in the computer device in software form, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0127] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0128] According to the modeling information of the target fuel system, determine the topological information of the target fuel system; the topological information includes the fluid unit and the mechanical unit of the target fuel system, and the association relationship between the fluid unit and the mechanical unit;

[0129] According to the topological information, the modeling information, and the basic control model, determine the quasi-dynamic model of the fluid unit; the basic control model includes: the momentum sub-model of the fluid branch, the mass conservation sub-model of the fluid node, the momentum sub-model of the mechanical unit, and the flow rate sub-model of the mechanical unit.

[0130] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0131] Extract features from the modeling information to determine the topology matrix of the target fuel system;

[0132] Determine the topology information of the target fuel system according to the topology matrix.

[0133] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0134] Extract features from the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determine the connection relationship between the fluid units and the mechanical units;

[0135] Determine the topology matrix of the target fuel system according to the connection relationship between the fluid units and the mechanical units.

[0136] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0137] Determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model;

[0138] Determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topology information and the basic control model.

[0139] In one embodiment, when the processor executes the computer program, the following steps are also implemented:

[0140] Determine the associated mechanical units and associated fluid nodes associated with the fluid components according to the association relationship in the topology information;

[0141] Form an initial quasi-dynamic model of the fluid component according to the associated mechanical units, the associated fluid nodes and the basic control model;

[0142] Substitute the mechanical motion parameters of the associated mechanical units and the associated fluid nodes into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0143] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0144] Determine the topology information of the target fuel system according to the modeling information of the target fuel system; the topology information includes the fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units;

[0145] Determine the quasi-dynamic model of the fluid unit according to the topology information, the modeling information and the basic control model; the basic control model includes: the momentum sub-model of the fluid branch, the mass conservation sub-model of the fluid node, the momentum sub-model of the mechanical unit, and the flow rate sub-model of the mechanical unit.

[0146] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0147] Extract features from the modeling information to determine the topological matrix of the target fuel system;

[0148] Determine the topological information of the target fuel system according to the topological matrix.

[0149] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0150] Extract features from the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determine the connection relationships between the fluid units and the mechanical units;

[0151] Determine the topological matrix of the target fuel system according to the connection relationships between the fluid units and the mechanical units.

[0152] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0153] Determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model;

[0154] Determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topological information and the basic control model.

[0155] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0156] Determine the associated mechanical units and associated fluid nodes associated with the fluid components according to the association relationships in the topological information;

[0157] Form an initial quasi-dynamic model of the fluid component according to the associated mechanical units, the associated fluid nodes and the basic control model;

[0158] Substitute the mechanical motion parameters of the associated mechanical units and the associated fluid nodes into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0159] In one embodiment, a computer program product is provided, including a computer program which, when executed by a processor, implements the following steps:

[0160] Determine the topological information of the target fuel system according to the modeling information of the target fuel system; the topological information includes the fluid units and mechanical units of the target fuel system, and the association relationships between the fluid units and the mechanical units;

[0161] Determine the quasi-dynamic model of the fluid unit according to the topological information, modeling information, and basic control model; the basic control model includes: the momentum sub-model of the fluid branch, the mass conservation sub-model of the fluid node, the momentum sub-model of the mechanical unit, and the flow rate sub-model of the mechanical unit.

[0162] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0163] Extract features from the modeling information to determine the topological matrix of the target fuel system;

[0164] Determine the topological information of the target fuel system according to the topological matrix.

[0165] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0166] Extract features from the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determine the connection relationship between the fluid units and the mechanical units;

[0167] Determine the topological matrix of the target fuel system according to the connection relationship between the fluid unit and the mechanical unit.

[0168] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0169] Determine the mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model;

[0170] Determine the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, topological information, and basic control model.

[0171] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0172] Determine the associated mechanical unit and associated fluid node associated with the fluid component according to the association relationship in the topological information;

[0173] Form the initial quasi-dynamic model of the fluid component according to the associated mechanical unit, associated fluid node, and basic control model;

[0174] Substitute the mechanical motion parameters of the associated mechanical unit and associated fluid node into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

[0175] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0176] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this application.

[0177] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A method for constructing a quasi-dynamic model, characterized in that, The method includes: Determining topological information of the target fuel system according to modeling information of the target fuel system; the topological information includes fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units; Determining a quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and a basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system.

2. The method according to claim 1, characterized in that, The determining topological information of the target fuel system according to the modeling information of the target fuel system includes: Performing feature extraction on the modeling information to determine a topological matrix of the target fuel system; Determining the topological information of the target fuel system according to the topological matrix.

3. The method according to claim 2, characterized in that, The performing feature extraction on the modeling information to determine the topological matrix of the target fuel system includes: Performing feature extraction on the modeling information to determine the fluid units and mechanical units corresponding to the modeling information, and determining the connection relationship between the fluid units and the mechanical units; Determining the topological matrix of the target fuel system according to the connection relationship between the fluid units and the mechanical units.

4. The method according to claim 1, characterized in that The modeling information includes mechanical parameter information of the target fuel system. The determining the quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and the basic control model includes: Determining mechanical motion parameters of the target fuel system according to the mechanical parameter information and the basic control model; Determining the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topological information, and the basic control model.

5. The method according to claim 4, wherein The fluid unit includes fluid nodes and fluid components. The determining the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topological information, and the basic control model includes: Determining associated mechanical units and associated fluid nodes associated with the fluid component according to the association relationship in the topological information; Forming an initial quasi-dynamic model of the fluid component according to the associated mechanical units, the associated fluid nodes, and the basic control model; Substituting the mechanical motion parameters of the associated mechanical units and the associated fluid nodes into the initial quasi-dynamic model to determine the quasi-dynamic model of the fluid component.

6. The method according to any one of claims 1-5, characterized in that, The basic control model includes: a momentum sub-model of a fluid branch, a mass conservation sub-model of a fluid node, a momentum sub-model of a mechanical unit, and a flow rate sub-model of a mechanical unit.

7. An apparatus for constructing a quasi-dynamic model, characterized in that The device includes: A first determination module, configured to determine topological information of the target fuel system according to modeling information of the target fuel system; the topological information includes fluid units and mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units; A second determination module, configured to determine a quasi-dynamic model of the fluid unit according to the topological information, the modeling information, and a basic control model; the basic control model is used to determine the coupling effect between the fluid unit and the mechanical unit and the influence on the fuel system.

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

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

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

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