Method and device for constructing quasi-dynamic model, computer device and storage medium

Abstract

The application relates to a quasi-dynamic model construction method and device, computer equipment and a storage medium. The method comprises the following steps: determining topology information of a target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system and an association relationship between the fluid units and the mechanical units; determining a quasi-dynamic model of the fluid units according to the topology information, the modeling information and a basic control model; the basic control model is used for determining coupling effects between the fluid units and the mechanical units and influences on the fuel system. By comprehensively considering the coupling effects of the fluid and the mechanical, the system behavior of the target fuel system is more accurately described, the topology information of the target fuel system is more comprehensive, the accuracy of the topology information of the target fuel system is improved, and the accuracy of the model of the constructed target fuel system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of model construction, in particular to a quasi-dynamic model construction method and device, computer equipment and a storage medium. BACKGROUND

[0002] In the development and verification process of an aero-engine fuel-oil system, modeling simulation is an indispensable key means. The fuel-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 design and operation efficiency, but also effectively reduce costs and provide support for optimization of various links.

[0003] In traditional technologies, a modeling method based on control volume and a modeling method based on a fluid network are usually used. In the modeling method based on control volume, the fuel-oil system is divided into several control volumes, and fluid parameters in each volume are described by mass conservation, momentum conservation and energy conservation equations; in the modeling method based on a fluid network, each component in the fluid system is modeled as a one-dimensional element and connected into a network, and the overall system is coupled and described by connection relationships and fluid equations.

[0004] However, the traditional modeling method based on control volume has the problem of being difficult to efficiently describe the overall behavior of a complex system, and the modeling method based on a fluid network has poor multi-physical field modeling capability, and neither of the traditional modeling methods can balance networked description and high-precision "mechanical-fluid" coupling to realize automatic modeling of a component-level complex fuel-oil system mechanism model. SUMMARY

[0005] Therefore, it is necessary to provide a quasi-dynamic model construction method, device, computer equipment and storage medium capable of realizing networked description and high-precision "mechanical-fluid" coupling of a complex fuel-oil system.

[0006] In a first aspect, the present application provides a quasi-dynamic model construction method, comprising:

[0007] According to modeling information of a target fuel-oil system, topological information of the target fuel-oil system is determined; the topological information comprises fluid units and mechanical units of the target fuel-oil system, and an association relationship between the fluid units and the mechanical units;

[0008] According to the topological information, the modeling information and a basic control model, a quasi-dynamic model of the fluid units is determined; the basic control model is used to determine coupling actions between the fluid units and the mechanical units, and an influence on the fuel-oil system.

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

[0010] performing feature extraction on the modeling information to determine a 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 of the embodiments, the performing feature extraction on the modeling information to determine a topology matrix of the target fuel system comprises:

[0013] performing feature extraction on the modeling information to determine fluid units and mechanical units corresponding to the modeling information, and a 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 of the embodiments, the modeling information comprises mechanical parameter information of the target fuel system, and the determining the quasi-dynamic model of the fluid unit according to the topology information, the modeling information and a basic control model comprises:

[0016] determining 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 of the embodiments, the fluid unit comprises fluid nodes and fluid components, and the determining the quasi-dynamic model of the fluid unit according to the mechanical motion parameters, the topology information and the basic control model comprises:

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

[0020] 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;

[0021] 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.

[0022] In one of the embodiments, the basic control model comprises: 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 sub-model of the mechanical unit.

[0023] In a second aspect, the application further provides a construction device of a quasi-dynamic model, comprising:

[0024] A first determining module is configured to determine topology information of a target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units;

[0025] A second determining module is configured to determine a quasi-dynamic model of the fluid units according to the topology information, the modeling information, and a basic control model; the basic control model is used to determine coupling actions between the fluid units and the mechanical units, and influences on the fuel system.

[0026] In a third aspect, the application further provides a computer device, comprising a memory and a processor; the memory stores a computer program; and the processor implements the following steps when executing the computer program:

[0027] determining topology information of a target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units;

[0028] determining a quasi-dynamic model of the fluid units according to the topology information, the modeling information, and a basic control model; the basic control model is used to determine coupling actions between the fluid units and the mechanical units, and influences on the fuel system.

[0029] In a fourth aspect, the application further provides a computer readable storage medium, which stores a computer program; the computer program is executed by a processor to implement the following steps:

[0030] determining topology information of a target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units;

[0031] determining a quasi-dynamic model of the fluid units according to the topology information, the modeling information, and a basic control model; the basic control model is used to determine coupling actions between the fluid units and the mechanical units, and influences on the fuel system.

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

[0033] According to the modeling information of the target fuel system, topological information of the target fuel system is determined; the topological information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units;

[0034] According to the topological information, the modeling information and a basic control model, a quasi-dynamic model of the fluid units is determined; the basic control model is used to determine a coupling effect between the fluid units and the mechanical units, and an influence on the fuel system.

[0035] The quasi-dynamic model construction method, device, computer device and storage medium described above, according to the modeling information of the target fuel system, determine the topological information of the target fuel system; the topological information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units; according to the topological information, the modeling information and a basic control model, a quasi-dynamic model of the fluid units is determined; the basic control model is used to determine a coupling effect between the fluid units and the mechanical units, and an influence on the fuel system. By comprehensively considering the coupling effect of fluid and mechanical, a more accurate system behavior description of the target fuel system is made, so that the topological information of the target fuel system is more comprehensive, thereby improving the accuracy of the topological information of the target fuel system, and improving the accuracy of the model of the target fuel system constructed. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other related drawings can also be obtained from these drawings.

[0037] Figure 1 For an application environment diagram of the quasi-dynamic model construction method in an embodiment;

[0038] Figure 2 For a flowchart of the quasi-dynamic model construction method in an embodiment;

[0039] Figure 3 For a flowchart of the quasi-dynamic model construction method in another embodiment;

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

[0041] Figure 5 a topology diagram of a target fuel system in one embodiment;

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

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

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

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

[0046] Figure 10 a structural block diagram of a device for constructing a quasi-dynamic model in one embodiment. DETAILED DESCRIPTION

[0047] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and 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 in 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 the 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 capability. 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 a computer program. The internal memory provides an environment for the operation of the operating system and the computer program 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. Wireless mode can be achieved through WIFI, mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. The computer program is executed by the processor to implement a quasi-dynamic model construction method. 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 overlaid on the display screen, or a key, trackball or touchpad arranged on the shell 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 part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

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

[0051] S201, according to the modeling information of the target fuel system, determining 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 a system image or text information.

[0053] In the embodiment of the present application, the user inputs modeling information of a target fuel system to a terminal. When the modeling information is a system image, the system image can be subjected to image recognition to determine system components included in the system image. Further, the system components are filtered to remove useless or interfering components in the system components, to obtain filtered system components. Then, the filtered system components are subjected to feature extraction to determine fluid units and mechanical units of the target fuel system, and an 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, so that the fluid units and the mechanical units of the target fuel system, and the association relationship between the fluid units and the mechanical units are extracted from the converted text information.

[0054] Optionally, the fluid unit can include a fluid node and a fluid component, and the association relationship between the fluid unit and the mechanical unit can include a fluid association, a mechanical relationship and a fluid branch. The fluid node represents a connection point formed by fluid association between fluid components. The fluid component represents a control body in the fuel system with equal import and export cross-sectional flow, has two fluid ports associated with different fluid nodes, and has at most one mechanical port associated with the mechanical unit. The mechanical unit is a mechanical moving body in the fuel system, and can be mechanically associated with the fluid node and the fluid component. The fluid association represents a fluid communication relationship. The mechanical association represents an 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 body composed of fluid components in series or parallel relationship. A fluid branch directly composed of one fluid component is referred to as a basic fluid branch.

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

[0056] In the embodiment of the present application, an initial quasi-dynamic model of the fluid unit can be determined according to the topological information and the basic control model. Further, a 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 quasi-dynamic model, the topological information of the target fuel system is determined 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 an association relationship between the fluid units and the mechanical units; and the quasi-dynamic model of the fluid unit is determined 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 units and the mechanical units, and the influence on the fuel system. By comprehensively considering the coupling effect of the fluid and the mechanical, the system behavior of the target fuel system is more accurately described, the topological information of the target fuel system is more comprehensive, and thus the accuracy of the topological information of the target fuel system is improved, and the accuracy of the model of the target fuel system constructed is improved.

[0058] In one embodiment, an implementation of S201 is provided, as shown in Figure 3 According to the modeling information of the target fuel system, the topological information of the target fuel system is determined, including:

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

[0060] In the embodiments of the present application, the modeling information can include a structural schematic diagram of the target fuel system. For example, the structural schematic diagram of the target fuel system can be as shown in Figure 4 The positions of the fluid structure and the mechanical structure in the structural schematic diagram of the target fuel system are analyzed and processed to extract structural features in the structural schematic diagram. The structural features can include the positions of the components in the target fuel system, so as to determine a topological structure diagram and a topological matrix of the target fuel system according to the structural features. Optionally, the structural schematic diagram of the target fuel system can be as shown in Figure 4 The topological structure diagram corresponding to the structural schematic diagram can be as shown in Figure 5

[0061] As another optional implementation, the modeling information can include a textual description of the target fuel system. The textual description of the structural features is screened to remove interference information in the textual description, and the structural features of the target fuel system are determined. The structural features can include the positions of the components in the target fuel system, so as to determine a topological structure diagram and a topological matrix of the target fuel system according to the structural features.

[0062] Optionally, as shown in Figure 5 In the topological structure diagram, the fluid nodes can be represented as circles, the fluid components can be represented as rectangles, the mechanical units can be represented as diamonds, the fluid communication relationship between the fluid nodes and the fluid components can be represented as single-arrow solid lines, and the influence relationship between the fluid units and the mechanical units can be represented as single-arrow dashed lines.

[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 represent the association relationship between the fluid units, and the second topology matrix can be used to represent the association relationship between the fluid units and the mechanical units.

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

[0065] S401, feature extraction on the modeling information, determination of the fluid units and the mechanical units corresponding to the modeling information, and determination of the connection relationship between the fluid units and the mechanical units.

[0066] The connection relationship between the fluid units and the mechanical units includes the flow direction between the fluid units, and the influence relationship 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, the feature extraction on the modeling information is to determine the number of the fluid components, the fluid nodes and the mechanical units in the topology structure diagram, the positions of the components in the topology structure diagram, and the association relationship between the components, further, the fluid components, the fluid nodes and the mechanical units, and the association relationship between the components can be described according to the graphs and the lines with arrows, to form the topology structure diagram.

[0068] Optionally, the flow direction between the fluid nodes and the fluid components can be described by a single-headed solid line, and the influence relationship between the fluid nodes and the mechanical units can be described by a single-headed dashed line. As shown in Figure 5 , the topology structure diagram includes 5 fluid components, 6 fluid nodes and 2 mechanical units, each fluid component is located on a basic fluid branch, that is, Figure 5 , which includes 5 basic fluid branches, wherein the flow direction between the fluid units is consistent with the direction of the single-headed solid line, and the influence relationship between the fluid units and the mechanical units is consistent with the direction of the single-headed dashed line, for example, the mechanical unit 2 has an influence on the fluid component 1, the fluid component 2, the fluid component 3 and the fluid component 4, the fluid component 1 and the fluid component 2 have an influence on the mechanical unit 1, and the mechanical unit 1 has an influence on the fluid component 5.

[0069] S402, determination of the topology matrix of the target fuel system according to the connection relationship 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 bwherein m is the number of fluid components, 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 ith row and the jth column is 1, it indicates that the jth fluid node is the downstream node of the ith fluid component. a If the matrix coefficient in the ith row and the jth column is -1, it indicates that the jth fluid node is the upstream node of the ith fluid component. b If the matrix element in the jth row and the kth column is 1, it indicates that the displacement increase of the kth mechanical unit corresponds to the flow into the jth fluid node. b If the matrix element in the jth row and the kth column is -1, it indicates that the displacement increase of the kth mechanical unit corresponds to the flow out of the jth fluid node.

[0071] Exemplarily, Figure 5 The topological structure diagram of the target fuel system corresponds to D a which can be expressed as Formula 1, D b which can be expressed as Formula 2:

[0072] (Formula 1)

[0073] (Formula 2)

[0074] S302, according to the topological matrix, determining the topological information of the target fuel system.

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

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

[0077] In one embodiment, an implementation of S202 is provided, and the modeling information includes mechanical parameter information of the target fuel system, such as Figure 7 As shown in the above, “determining the quasi-dynamic model of the fluid unit according to the topological information, the modeling information and the basic control model” includes:

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

[0079] 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 sub-model of the mechanical unit. Optionally, the momentum sub-model of the fluid branch can be as shown in formula 1, the mass conservation sub-model of the fluid node can be as shown in formula 2, the momentum sub-model of the mechanical unit can be as shown in formula 3, and the flow sub-model in the mechanical unit can be as shown in formula 4.

[0080] Formula 1

[0081] Formula 2

[0082] Formula 3

[0083] Formula 4

[0084] The topology structure corresponding to the basic control model includes m basic fluid branches, n fluid nodes, and l mechanical units. In formula 1, the influence of mechanical motion body displacement is considered, and in formula 1, , denotes the volume flow rate of the i th basic fluid branch, denotes the upstream node pressure of the i th basic fluid branch, denotes the downstream node pressure of the i th basic fluid branch, denotes the motion body displacement of the associated mechanical unit of the i th basic fluid branch; in formula 2, the influence of mechanical unit motion on fluid node in-out flow rate is considered, and in formula 2, , denotes the volume flow rate of the i th basic fluid branch, , denotes the volume flow rate of the j th fluid node flowing to the outside, denotes the volume flow rate of the k th mechanical unit flowing into the j th fluid node; formula 3 is used to describe the correlation between mechanical motion body force and displacement, and in formula 3, , p j denotes the pressure of the j th fluid node, denotes the motion body displacement of the k th mechanical unit.

[0085] In the embodiment of the application, by introducing the two assumptions of “liquid incompressibility” and “motion body in force balance state”, the mechanical parameter information is substituted into the basic control model to obtain mechanical motion parameters.

[0086] Optionally, the non-steady state term of the momentum sub-model of the fluid branch is ignored, and according to formula 1, Ignoring the unsteady-state terms of the mass conservation sub-model at the fluid nodes, we can obtain the following from Equation 2: Where L1 is the number of unknown velocities; neglecting the unsteady-state terms in the dynamic quantum model of the mechanical unit, we can obtain the following from Equation 3: L2 is the number of unknown velocities plus unknown positions, A jk c represents the area affected by node j on element k. k It is the spring stiffness, d k It is the spring preload, b jk It is matrix D b The element value in the j-th row and k-th column; further, ignoring the unsteady-state 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 determines the quasi-dynamic model of the fluid unit based on mechanical motion parameters, topology information, and basic control model.

[0090] In this embodiment of the application, an initial quasi-dynamic model is obtained based on the basic control model and topology information. Furthermore, the mechanical motion parameters are substituted into the initial dynamic model to determine the quasi-dynamic model of the fluid unit.

[0091] In the above-mentioned embodiments, the mechanical motion parameters of the target fuel system are determined based on the basic control model and the input mechanical parameter information. Then, based on the mechanical motion parameters, topology information and basic control model, the quasi-dynamic model of the fluid unit is determined, so that the quasi-dynamic model is more compatible with the target fuel system.

[0092] In one embodiment, one implementation of the above S502 is provided, wherein the fluid unit includes fluid nodes and fluid components, such as... Figure 8 As shown, the above-mentioned "determining the quasi-dynamic model of the fluid unit based on mechanical motion parameters, topology information, and basic control model" includes:

[0093] S601, based on the association relationships in the topology information, determine the associated mechanical units and associated fluid nodes associated with the fluid components.

[0094] In this embodiment of the application, for each fluid unit, the associated mechanical units and associated fluid nodes related to the fluid component are determined from the topology information. For example, Figure 5 The upstream fluid node of fluid component 1 is fluid node 3, the downstream fluid node of fluid component 2 is fluid node 1, and the associated mechanical unit of fluid component 1 includes mechanical unit 2.

[0095] S602, forming an initial quasi-dynamic model of the fluid assembly according to the associated mechanical unit, the associated fluid node and the basic control model.

[0096] In the embodiment of the present application, the initial quasi-dynamic model of each fluid assembly and the conservation relation are obtained by combining the basic control model.

[0097] Optionally, Figure 5 The initial quasi-dynamic model corresponding to each fluid node, fluid assembly and mechanical unit can include: ; ; ; ; ; ; ; ; ; ; ; and:

[0098] and

[0099] wherein e is a coefficient constant in the flow formula, and 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 assembly.

[0101] In the embodiment of the present application, , , , , , , , , Substitute the mechanical motion parameters of the associated mechanical unit and the associated fluid node into the initial quasi-dynamic model of the fluid assembly to determine the quasi-dynamic model of the fluid assembly.

[0102] In the above embodiment, the initial quasi-dynamic model of the fluid assembly is determined according to the association relationship of each unit of the target fuel system, so that the quasi-dynamic model of each fluid assembly is determined according to the mechanical motion parameters and the initial quasi-dynamic model, and the accuracy of the quasi-dynamic model is improved.

[0103] In one embodiment, a complete method for constructing a quasi-dynamic model is provided, as shown in Figure 9 The above method comprises:

[0104] S1, feature extraction is performed on the modeling information to form a topological structure diagram of the target fuel system.

[0105] S2, feature extraction is performed on the modeling information, the fluid unit and the mechanical unit corresponding to the modeling information are determined, and the connection relationship between the fluid unit and the mechanical unit is determined.

[0106] S3, the topological matrix of the target fuel system is determined according to the connection relationship between the fluid unit and the mechanical unit.

[0107] S4, the topological information of the target fuel system is determined according to the topological matrix; 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.

[0108] S5, the mechanical motion parameter of the target fuel system is determined according to the mechanical parameter information and the basic control model; 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 sub-model of a mechanical unit.

[0109] S6, the associated mechanical unit and the associated fluid node related to the fluid assembly are determined according to the association relationship in the topological information.

[0110] S7, the initial quasi-dynamic model of the fluid assembly is formed according to the associated mechanical unit, the associated fluid node and the basic control model.

[0111] S8, the quasi-dynamic model of the fluid assembly is determined by substituting the mechanical motion parameters of the associated mechanical unit and the associated fluid node into the initial quasi-dynamic model.

[0112] In the above quasi-dynamic model construction method, the topological information of the target fuel system is determined according to the modeling 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; the quasi-dynamic model of the fluid unit is determined 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. By comprehensively considering the coupling effect of fluid and mechanical, the system behavior of the target fuel system is described more accurately, the topological information of the target fuel system is more comprehensive, thereby improving the accuracy of the topological information of the target fuel system, and improving the accuracy of the model of the target fuel system constructed.

[0113] It should be understood that although the steps in the flowcharts involved in the embodiments described above are shown in sequence according to the arrows, the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the execution of the steps is not strictly limited in sequence, and the steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, which are not necessarily executed at the same time but can be executed at different times, and the execution of the steps or stages is not necessarily sequential but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0114] Based on the same inventive concept, the embodiments of the present application also provide a quasi-dynamic model construction device for implementing the quasi-dynamic model construction method described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more quasi-dynamic model construction device embodiments provided below can refer to the limitations of the quasi-dynamic model construction method described above, and will not be repeated here.

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

[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 the 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 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 sub-model of a mechanical unit.

[0118] In one embodiment, the second determination module 11 described above comprises: an extraction unit, a first determination unit and a second determination unit, wherein:

[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 first determining unit is specifically configured to perform feature extraction on the modeling information, determine fluid units and mechanical units corresponding to the modeling information, and determine connection relationships between the fluid units and the mechanical units; and determine a topology matrix of the target fuel system according to the connection relationships between the fluid units and the mechanical units.

[0122] In one embodiment, the modeling information comprises mechanical parameter information of the target fuel system, and the first determining module 10 comprises a third determining unit and a fourth determining unit.

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

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

[0125] In one embodiment, the fluid unit comprises fluid nodes and fluid components, and the fourth determining unit is specifically configured to determine associated mechanical units and associated fluid nodes related to the fluid components according to the association relationship in the topology information; 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; and 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.

[0126] The modules in the quasi-dynamic model construction device can be realized by software, hardware, or a combination thereof. The modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in the computer device in software form, so as to be called and executed by the processor to perform operations corresponding to the modules.

[0127] In one embodiment, a computer device is provided, comprising a memory and a processor, the memory storing a computer program, and the processor implementing the following steps when executing the computer program:

[0128] determining topology information of the target fuel system according to modeling information of the target fuel system; the topology information comprising fluid units and mechanical units of the target fuel system, and association relationships between the fluid units and the mechanical units;

[0129] determining a quasi-dynamic model of the fluid unit according to the topology information, the modeling information, and a basic control model; the basic control model comprising 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 sub-model of the mechanical unit.

[0130] In one embodiment, the processor further implements the following steps when executing the computer program:

[0131] feature extraction is performed on the modeling information to determine a topology matrix of the target fuel system;

[0132] According to the topology matrix, the topology information of the target fuel system is determined.

[0133] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0134] feature extraction is performed on the modeling information to determine fluid units and mechanical units corresponding to the modeling information, and to determine connection relationships between the fluid units and the mechanical units;

[0135] According to the connection relationships between the fluid units and the mechanical units, a topology matrix of the target fuel system is determined.

[0136] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0137] According to the mechanical parameter information and the basic control model, mechanical motion parameters of the target fuel system are determined.

[0138] According to the mechanical motion parameters, the topology information, and the basic control model, a quasi-dynamic model of the fluid unit is determined.

[0139] In one embodiment, the processor, when executing the computer program, also implements the following steps:

[0140] According to the association relationship in the topology information, an associated mechanical unit and an associated fluid node associated with the fluid assembly are determined;

[0141] According to the associated mechanical unit, the associated fluid node, and the basic control model, an initial quasi-dynamic model of the fluid assembly is formed;

[0142] The mechanical motion parameters of the associated mechanical unit and the associated fluid node are substituted into the initial quasi-dynamic model to determine a quasi-dynamic model of the fluid assembly.

[0143] In one embodiment, a computer readable storage medium is provided, which stores a computer program, and the computer program, when executed by a processor, implements the following steps:

[0144] According to the modeling information of the target fuel system, topology information of the target fuel system is determined; the topology information includes fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units;

[0145] According to the topology information, the modeling information, and a basic control model, a quasi-dynamic model of the fluid unit is determined; 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 sub-model of a mechanical unit.

[0146] In one embodiment, the computer program which is executed by the processor further implements the following steps:

[0147] feature extraction is performed on the modeling information to determine a topology matrix of the target fuel system;

[0148] According to the topology matrix, the topology information of the target fuel system is determined.

[0149] In one embodiment, the computer program which is executed by the processor further implements the following steps:

[0150] feature extraction is performed on the modeling information to determine fluid units and mechanical units corresponding to the modeling information, and a connection relationship between the fluid units and the mechanical units is determined;

[0151] According to the connection relationship between the fluid units and the mechanical units, a topology matrix of the target fuel system is determined.

[0152] In one embodiment, the computer program which is executed by the processor further implements the following steps:

[0153] According to the mechanical parameter information and the basic control model, mechanical motion parameters of the target fuel system are determined;

[0154] According to the mechanical motion parameters, the topology information and the basic control model, a quasi-dynamic model of the fluid unit is determined.

[0155] In one embodiment, the computer program which is executed by the processor further implements the following steps:

[0156] According to the associated relationship in the topology information, associated mechanical units and associated fluid nodes related to the fluid assembly are determined;

[0157] According to the associated mechanical units, the associated fluid nodes and the basic control model, an initial quasi-dynamic model of the fluid assembly is formed;

[0158] The mechanical motion parameters of the associated mechanical units and the associated fluid nodes are substituted into the initial quasi-dynamic model to determine a quasi-dynamic model of the fluid assembly.

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

[0160] According to the modeling information of the target fuel system, topology information of the target fuel system is determined; the topology information includes fluid units and mechanical units of the target fuel system, and an associated relationship between the fluid units and the mechanical units;

[0161] According to the topological information, the modeling information and the basic control model, a quasi-dynamic model of the fluid unit is determined; the basic control model comprises: a momentum sub-model of the fluid branch, a mass conservation sub-model of the fluid node, a momentum sub-model of the mechanical unit and a flow sub-model of the mechanical unit.

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

[0163] The modeling information is feature extracted to determine a topological matrix of the target fuel system.

[0164] According to the topological matrix, topological information of the target fuel system is determined.

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

[0166] The modeling information is feature extracted to determine fluid units and mechanical units corresponding to the modeling information, and a connection relationship between the fluid units and the mechanical units is determined;

[0167] According to the connection relationship between the fluid units and the mechanical units, a topological matrix of the target fuel system is determined.

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

[0169] According to the mechanical parameter information and the basic control model, mechanical motion parameters of the target fuel system are determined;

[0170] According to the mechanical motion parameters, the topological information and the basic control model, a quasi-dynamic model of the fluid unit is determined.

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

[0172] According to the association relationship in the topological information, associated mechanical units and associated fluid nodes related to the fluid assembly are determined;

[0173] According to the associated mechanical units, the associated fluid nodes and the basic control model, an initial quasi-dynamic model of the fluid assembly is formed;

[0174] Mechanical motion parameters of the associated mechanical units and the associated fluid nodes are substituted into the initial quasi-dynamic model to determine a quasi-dynamic model of the fluid assembly.

[0175] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiment methods. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, 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. The volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0176] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0177] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A method of constructing a quasi-dynamic model, characterized by, The method comprises: determining topology information of the target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system, and an association relationship between the fluid units and the mechanical units; the modeling information comprises mechanical parameter information of the target fuel system; the fluid units comprise fluid components and fluid nodes; determining mechanical motion parameters of the target fuel system according to the mechanical parameter information and a basic control model; the basic control model is used to determine coupling effects between the fluid units and the mechanical units, and influences on the fuel system; the basic control model comprises 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 sub-model of a mechanical unit; determining a quasi-dynamic model of the fluid units according to the mechanical motion parameters, the topology information, and the basic control model; The topology diagram corresponding to the basic control model includes m basic fluid branches, n fluid nodes, and l mechanical units. The dynamic quantum model of the fluid branches is as follows: The mass conservation sub-model of the fluid node is as follows: The dynamic quantum model of the mechanical unit is The flow sub-model of the mechanical unit is , , This represents the volumetric flow rate of the i-th basic fluid branch. This represents the pressure at the upstream node of the i-th basic fluid branch. This represents the pressure at the downstream node of the i-th basic fluid branch. Represents the displacement of the moving body of the associated mechanical unit in the i-th basic fluid branch; Q represents the volumetric flow rate of the j-th fluid node flowing to the outside. jk,snk This represents the volumetric flow rate from the k-th mechanical unit into the j-th fluid node. p j This represents the pressure at the j-th fluid node. , This represents the displacement of the k-th mechanical unit.

2. The method of claim 1, wherein, The method comprises: extracting features from the modeling information to determine a topology matrix of the target fuel system; determining the topology information of the target fuel system according to the topology matrix.

3. The method of claim 2, wherein, The method comprises: extracting features from the modeling information to determine fluid units and mechanical units corresponding to the modeling information, and a connection relationship between the fluid units and the mechanical units; determining the topology matrix of the target fuel system according to the connection relationship between the fluid units and the mechanical units.

4. The method of claim 3, wherein, The topology matrix comprises a first topology matrix and a second topology matrix; if a matrix coefficient in the i-th row and the j-th column of the first topology matrix is 1, it indicates that the j-th fluid node is a downstream node of the i-th fluid component; if the matrix coefficient in the i-th row and the j-th column of the first topology matrix is -1, it indicates that the j-th fluid node is an upstream node of the i-th fluid component; if a matrix element in the j-th row and the k-th column of the second topology matrix is 1, it indicates that corresponding flow of the k-th mechanical unit displacement increase flows into the j-th fluid node; if the matrix element in the j-th row and the k-th column of the second topology matrix is -1, it indicates that corresponding flow of the k-th mechanical unit displacement increase flows out of the j-th fluid node.

5. The method of claim 1, wherein, The fluid units comprise fluid nodes and fluid components; the method comprises: determining associated mechanical units and associated fluid nodes related to the fluid components according to the association relationship in the topology information; forming an initial quasi-dynamic model of the fluid components 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 a quasi-dynamic model of the fluid components.

6. An apparatus for constructing a quasi-dynamic model, characterized by The device comprises: The first determining module is configured to determine topology information of the target fuel system according to modeling information of the target fuel system; the topology information comprises fluid units and mechanical units of the target fuel system and an association relationship between the fluid units and the mechanical units; the modeling information comprises mechanical parameter information of the target fuel system; and the fluid units comprise fluid components and fluid nodes. The second determining module is configured to determine mechanical motion parameters of the target fuel system according to the mechanical parameter information and a basic control model; the basic control model is used to determine coupling effects between the fluid units and the mechanical units and influences on the fuel system; and the basic control model comprises 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 sub-model of a mechanical unit. A quasi-dynamic model of the fluid units is determined according to the mechanical motion parameters, the topology information and the basic control model. The topology structure diagram corresponding to the basic control model comprises m basic fluid branches, n fluid nodes, and l mechanical units. The momentum sub-model of the fluid branch is The mass conservation sub-model of the fluid node is The momentum sub-model of the mechanical unit is , , The volume flow rate of the i-th basic fluid branch is represented by The upstream node pressure of the i-th basic fluid branch is represented by The downstream node pressure of the i-th basic fluid branch is represented by The motion body displacement of the associated mechanical unit of the i-th basic fluid branch is represented by The volume flow rate of the j-th fluid node flowing to the outside is represented by Q jk,snk The volume flow rate of the k-th mechanical unit flowing into the j-th fluid node is represented by , p j The pressure of the j-th fluid node is represented by , The motion body displacement of the k-th mechanical unit is represented by 7. The apparatus of claim 6, wherein, The first determining module comprises: A first determining unit is configured to perform feature extraction on the modeling information to determine a topology matrix of the target fuel system. A second determining unit is configured to determine the topology information of the target fuel system according to the topology matrix.

8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the method in any one of claims 1 to 5.

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