CN115795682A - Method and equipment for constructing simulation model of aircraft landing gear brake system and storage medium - Google Patents
Method and equipment for constructing simulation model of aircraft landing gear brake system and storage medium Download PDFInfo
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Abstract
The invention discloses a method, equipment and a storage medium for constructing a simulation model of an undercarriage brake system, wherein the method comprises the steps of decomposing the undercarriage brake system to obtain a framework of the undercarriage brake system; building a brake control subsystem simulation model library, and building a brake control subsystem model by using functional modules in the brake control subsystem simulation model library; building a brake hydraulic subsystem simulation model library, and building a brake hydraulic subsystem model by using component models in the brake hydraulic subsystem simulation model library; building a brake mechanical subsystem simulation model library, and building a brake mechanical subsystem model by using a Modelica dynamic simulation model of components in the brake mechanical subsystem simulation model library; and constructing a simulation model of the undercarriage braking system by using the brake control subsystem model, the brake hydraulic subsystem model and the brake mechanical subsystem model. The invention can improve the research and development efficiency of the aircraft landing gear braking system and reduce the research and development cost.
Description
Technical Field
The invention belongs to the technical field of engineering system modeling simulation, and particularly relates to a Modelica-based aircraft landing gear brake system simulation model construction method, equipment and a storage medium.
Background
The aircraft landing gear braking system is an important system for aircraft landing braking, absorbs the sliding kinetic energy of the aircraft in the process of landing and sliding of the ground of the aircraft, and rapidly reduces the sliding speed of the aircraft, so that the braking distance of the aircraft is shortened; the airplane is ensured to realize braking after landing, and the undercarriage brake system plays an important role in safe takeoff and safe landing of the airplane.
The aircraft landing gear braking system is the first technology of borrowing on the automobile, and has about 70 years of development history up to now. With the development of control technology, particularly the appearance of electro-hydraulic servo valves, the electronic anti-skid brake system is widely applied in countries such as the English and American countries, and the aircraft landing gear brake system enters a new development period. On the basis of introducing digestion and absorption into an aircraft antiskid brake system, china also develops various aircraft landing gear brake systems with antiskid control in succession, but compared with brake control equipment of international first-class manufacturers, the key performance of the product still has a large gap, and novel brake equipment needs to be further developed so as to improve reliability, operability, maintainability, safety and the like.
The traditional aircraft landing gear brake system product development mode depends on physical prototype development and testing, has the defects of long production and development period, difficult performance test under complex working conditions, high experimental cost and the like, and is difficult to meet the requirements of the aircraft landing gear brake system on product upgrading, technical innovation and the like.
The Modelica language is an object-oriented, equation-based and non-causal multi-field unified modeling language, has natural advantages for constructing a large-scale complex heterogeneous model which relates to the coupling of multiple subjects and multiple specialties such as machinery, electronics, control, hydraulic pressure, pneumatics and heat, can be used for establishing models of different subjects and different specialties in the same platform based on the Modelica language, has good openness, can be integrated with multiple heterogeneous models, can be used for performing system-level joint simulation, and is used for modeling and simulation analysis of a complex industrial system.
Disclosure of Invention
The invention aims to provide a method, equipment and a storage medium for constructing a simulation model of an aircraft landing gear brake system, so as to solve the problems that the traditional development and test based on a physical prototype results in long production development period, difficult performance test, high experiment cost, and difficulty in meeting the requirements of the aircraft landing gear brake system in the aspects of product upgrade, technical innovation and the like.
The invention solves the technical problems through the following technical scheme: a method for building a simulation model of an aircraft landing gear braking system comprises the following steps:
decomposing the aircraft landing gear braking system to obtain a framework of the aircraft landing gear braking system;
building a brake control subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and building a brake control subsystem model by using functional modules in the brake control subsystem simulation model library;
building a brake hydraulic subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and building a brake hydraulic subsystem model by using component models in the brake hydraulic subsystem simulation model library;
building a brake mechanical subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and building a brake mechanical subsystem model by using Modelica dynamic simulation models of components in the brake mechanical subsystem simulation model library;
and based on the physical topological structure of the undercarriage braking system, constructing an undercarriage braking system simulation model by the brake control subsystem model, the brake hydraulic subsystem model and the brake mechanical subsystem model.
Furthermore, the aircraft landing gear brake system is divided into a brake control subsystem, a brake hydraulic subsystem and a brake mechanical subsystem;
the brake control subsystem is decomposed into a normal brake module, a backup brake module, an automatic brake module, an anti-skid control module and an emergency brake module;
the brake hydraulic subsystem is divided into a power source, a control valve and an actuating mechanism; the power source is decomposed into a pressure source, a flow source and a pump source, the control valve is decomposed into a brake control valve, a cut-off valve, a one-way valve and a shuttle valve, and the actuating mechanism is decomposed into an undercarriage brake device;
the braking mechanical subsystem is divided into a left main landing gear, a right main landing gear, a main lifting door, a front landing gear and a front lifting door.
Further, the specific construction process of the brake control subsystem simulation model library is as follows:
and calling each function module of the brake control subsystem in the Modelica3.2.3 standard library, and forming a brake control subsystem simulation model library by each function module.
Further, the specific construction process of the brake control subsystem model comprises the following steps:
and constructing the brake control subsystem model by the functional modules in the brake control subsystem simulation model library based on Modelica language specifications and brake control logic.
Further, the specific construction process of the brake hydraulic subsystem simulation model library comprises the following steps:
building models of all parts of the brake hydraulic subsystem, and forming a brake hydraulic subsystem simulation model library by the models of all parts; the specific construction process of each component model comprises the following steps:
defining a working medium, a constraint equation and an abstract interface of a component through a text layer and a graphic layer based on Modelica language specification;
designing icons, parameter panels and component model description documents of components in a graphic layer;
and testing and optimizing the component model to complete the construction of the component model.
Further, the specific construction process of the brake hydraulic subsystem model comprises the following steps:
defining interfaces of each component model in the brake hydraulic subsystem simulation model library, determining physical flows and signal flows of the interfaces of each component model, and connecting the interfaces of each component model according to the physical flows and the signal flows of the interfaces of the component models to form each component model;
and defining interfaces of each component model, defining physical flows and signal flows of the interfaces of each component model, and connecting the interfaces of each component model according to the physical flows and the signal flows of the interfaces of the component models to form the brake hydraulic subsystem model.
Further, the specific construction process of the brake mechanical subsystem simulation model library comprises the following steps:
building a three-dimensional model of each component of the braking mechanical subsystem by using three-dimensional software;
exporting the three-dimensional models of the components by using a three-dimensional conversion plug-in to form Modelica dynamic simulation models of the corresponding components;
and opening the Modelica dynamic simulation model of each part, and forming a brake mechanical subsystem simulation model library by the Modelica dynamic simulation models of each part.
Further, the specific construction process of the braking mechanical subsystem model comprises the following steps:
converting a kinematic pair between the part Modelica dynamic simulation model and the part Modelica dynamic simulation model into a Modelica language kinematic pair model;
opening the Modelica dynamic simulation model of each part, establishing a connection relation with a world module, and packaging and combining the Modelica dynamic simulation models of all the parts to obtain a dynamic simulation model of the brake mechanical subsystem;
associating each Modelica dynamic simulation model in the dynamic simulation models of the brake mechanical subsystem with a three-dimensional standard geometric file, and setting the path and the position of the three-dimensional standard geometric file to realize the visualization of the dynamic simulation models of the brake mechanical subsystem;
and setting parameters of the dynamic simulation model of the braking mechanical subsystem to complete the construction of the braking mechanical subsystem model.
Based on the same inventive concept, the invention also provides a device for constructing the simulation model of the undercarriage brake system, which comprises:
a memory for storing a computer program;
and the processor is used for realizing the steps of the method for constructing the simulation model of the aircraft landing gear braking system when the computer program is executed.
Based on the same inventive concept, the invention further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for constructing the simulation model of the aircraft landing gear braking system are realized.
Advantageous effects
Compared with the prior art, the invention has the advantages that:
the method analyzes basic components of each subsystem forming the aircraft landing gear braking system, obtains structural characteristics and working characteristics of the basic components, develops a mathematical model of each basic component by adopting a Modelica language specification based on a mechanism modeling method, combines each basic component model according to a schematic diagram or control logic to obtain a corresponding subsystem model, and injects system parameters according to actual working conditions; and finally, combining the subsystems to form a complete aircraft landing gear braking system.
The invention adopts Modelica language development, so that the developed model library is clear in hierarchy, and the model can be reused and expanded, thereby greatly improving the modeling efficiency and being capable of rapidly and effectively carrying out modeling and simulation verification aiming at different signal requirements; the invention integrates hydraulic, mechanical and control subsystems, realizes multi-field unified modeling in the same software, and has higher simulation solving precision and efficiency compared with multi-field software combined simulation modeling.
When the model is constructed, the method of mechanism modeling is adopted, compared with other methods, the method has higher model simulation precision, is closer to the actual system working state, can obviously improve the research and development efficiency of the undercarriage brake system, reduces the research and development cost, and has important significance on maintenance iteration of the undercarriage brake system.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for building a simulation model of an aircraft landing gear braking system according to an embodiment of the invention;
FIG. 2 is an architectural diagram of an aircraft landing gear braking system in an embodiment of the present invention;
FIG. 3 is a model diagram of a brake control subsystem in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a model construction of components of a brake hydraulic subsystem in an embodiment of the invention;
FIG. 5 is a schematic diagram of an aircraft landing gear braking system simulation model library architecture according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a simulation model of an aircraft landing gear braking system in an embodiment of the invention.
The method comprises the following steps of 1-braking control subsystem model, 2-braking hydraulic subsystem model and 3-braking mechanical subsystem model.
Detailed Description
The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The technical means of the present application will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
As shown in fig. 1, a method for building a simulation model of an aircraft landing gear braking system according to an embodiment of the present invention includes the following steps:
the method comprises the following steps: disassembly of aircraft landing gear braking system
The method comprises the steps that a brake system of an aircraft landing gear is decomposed into a brake control subsystem, a brake hydraulic subsystem and a brake mechanical subsystem; the brake control subsystem is decomposed into a normal brake module, a backup brake module, an automatic brake module, an anti-skid control module and an emergency brake module according to functions; the brake hydraulic subsystem is decomposed into a power source, a control valve and an actuating mechanism, the power source is decomposed into a pressure source, a flow source and a pump source, the control valve is decomposed into a brake control valve, a cut-off valve, a one-way valve and a shuttle valve, and the actuating mechanism is mainly an undercarriage brake device; the braking mechanical subsystem is divided into a left main landing gear, a right main landing gear, a main lifting door, a front landing gear and a front lifting door; the architecture of the aircraft landing gear braking system thus obtained is shown in fig. 2.
Step two: and constructing a brake control subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and constructing a brake control subsystem model by using the functional modules in the brake control subsystem simulation model library.
As shown in fig. 2, the brake control subsystem includes a normal brake module, a backup brake module, an automatic brake module, an anti-skid control module, and an emergency brake module, and these function modules can be directly called from the modelica3.2.3 standard library, so the simulation model library of the brake control subsystem is composed of the normal brake module, the backup brake module, the automatic brake module, the anti-skid control module, and the emergency brake module, which are called from the modelica3.2.3 standard library.
Based on a brake control subsystem simulation model library, a multi-field unified modeling and simulation analysis software MWorks.
The brake control logic is as follows: the braking mechanical subsystem feeds back a wheel load signal, a wheel speed signal and the like, the fed-back wheel load signal and the wheel speed signal are compared with a corresponding reference signal for operation, and a current signal for controlling a brake control valve is output, so that the brake pressure is controlled, and the pedal brake module can be used for a normal brake module and a backup brake module at the same time. As shown in FIG. 3, the CombiTable1D module in Modelica is adopted to set the relationship between the brake pedal stroke and the brake control command and convert the relationship into a brake control valve signal. The automatic braking module principle considers the influence of brake slippage, and on the basis of the pedal braking principle, a brake pedal signal is changed into signals under different automatic braking gears. The anti-skid control module is mainly controlled by using a reference speed so as to ensure that the system has enough time to maintain the brake pressure at a lower level after each skid is removed and prevent secondary skid; the design requirement of the reference speed is as follows: when the speed of the airplane wheel is greater than the reference speed, taking the speed of the airplane wheel as the reference speed; when the wheel speed is less than the reference speed, the reference speed is reduced at some fixed deceleration rate that is greater than the actual deceleration rate of the aircraft. And (4) judging the wheel-mounted signal by adopting a timer module in the Modelica, and further judging whether the airplane is on the ground or in the air.
For functional modules which do not exist in the Modelica3.2.3 standard library, the functional modules can be constructed by adopting a construction mode of a component model in a simulation model library of the brake hydraulic subsystem, namely, a working medium, a constraint equation and an abstract interface of the functional modules are defined; designing icons, parameter panels and module description documents of the functional modules on a graphic layer; and testing and optimizing the functional module to complete the construction of the functional module.
Step three: and constructing a brake hydraulic subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and constructing a brake hydraulic subsystem model by using component models in the brake hydraulic subsystem simulation model library.
And building models of all parts of the brake hydraulic subsystem, and forming a brake hydraulic subsystem simulation model library by the models of all parts. Taking the brake control valve as an example, as shown in fig. 4, the specific construction process of each component model is as follows:
according to the basic principle of the brake control valve, based on Modelica language specifications, defining a working medium, a constraint equation and an abstract interface of the brake control valve by utilizing a text layer and a graphic layer of multi-field unified modeling and simulation analysis software MWorks.Sysplorer; designing an icon, a parameter panel and a model description document of the brake control valve on a graphic layer; and testing and optimizing the brake control valve model to complete the construction of the brake control valve model.
Based on a brake hydraulic subsystem simulation model library, the specific construction process of the brake hydraulic subsystem model is as follows:
step 3.1: defining interfaces of each component model in the brake hydraulic subsystem simulation model library, determining physical flows and signal flows of the interfaces of each component model, and connecting the interfaces of each component model according to the physical flows and the signal flows of the interfaces of the component models to form each component model;
step 3.2: and defining the interfaces of the component models, determining the physical flow and the signal flow of the interfaces of the component models, and connecting the interfaces of the component models according to the physical flow and the signal flow of the interfaces of the component models to form the brake hydraulic subsystem model.
The invention combines the actual physical model of the component and constructs the mathematical model based on the mechanism modeling method, the constructed component model can accurately reflect the working characteristics of the component, and the developed oil medium can reflect the fluid characteristics of oil in each component.
Step four: and constructing a braking mechanical subsystem simulation model base based on the framework of the aircraft landing gear braking system, and constructing a braking mechanical subsystem model by using Modelica dynamic simulation models of components in the braking mechanical subsystem simulation model base.
As shown in fig. 2, the braking mechanism subsystem mainly includes a left main landing gear, a right main landing gear, a main lift gate, a nose landing gear, and a nose lift gate. Building a three-dimensional model of each component of a braking mechanical subsystem in CATIA three-dimensional software; exporting the three-dimensional models of the parts by using a KineTrans plug-in to form a Modelica dynamic simulation model of the corresponding part, and converting a kinematic pair between the Modelica dynamic simulation model of the part and the Modelica dynamic simulation model of the part into a Modelica language kinematic pair model; a Modelica dynamic simulation model of each part is opened in multi-field unified modeling and simulation analysis software MWorks.
Based on the simulation model library of the braking mechanical subsystem, the specific construction process of the braking mechanical subsystem model is as follows:
step 4.1: opening a Modelica dynamic simulation model of each part in multi-field unified modeling and simulation analysis software MWorks.Sysplorer, calling a world module in a Modelica3.2.3 standard library, connecting the world module and the Modelica dynamic simulation model corresponding to each part through a posture conversion module, and packaging and combining the Modelica dynamic simulation models of all the parts to obtain the dynamic simulation model of the brake mechanical subsystem.
The attitude conversion module is used for constraining the coordinate system offset relationship between the world module and the Modelica dynamic simulation models corresponding to the parts, and adjusting the positions of the Modelica dynamic simulation models corresponding to the parts in the world module.
And 4.2: associating each Modelica dynamic simulation model in the dynamic simulation model of the braking mechanical subsystem with a three-dimensional standard geometric file (. Stl), and setting the path and the position of the three-dimensional standard geometric file to realize the visualization of the dynamic simulation model of the braking mechanical subsystem; through visual analysis, the motion analysis is carried out by combining three-dimensional animation and curves, and the debugging efficiency and the modeling accuracy of the model can be improved.
Step 4.3: and setting parameters of the dynamic simulation model of the braking mechanical subsystem to complete the construction of the braking mechanical subsystem model.
After the dynamic simulation model of the brake mechanical subsystem is built, parameters of Modelica dynamic simulation models of all components of the dynamic simulation model of the subsystem are required to be set. In the embodiment, a model is opened by using multi-field unified modeling and simulation analysis software mworks.
The parameters of the dynamic simulation model of the brake mechanical subsystem comprise parameters of a Modelica dynamic simulation model of each part, parameters of a Modelica language kinematic pair model, parameters of an attitude conversion module and parameters of a world module.
The method comprises the steps that Modelica dynamic simulation models (namely rigid body models) of all parts are main part models for constructing a brake mechanical subsystem, when all parts in a three-dimensional model of the brake mechanical subsystem are converted into the Modelica dynamic simulation models, all independent part models are regarded as rigid body models, main data of all parts in the three-dimensional model are added to the corresponding rigid body models, and each rigid body model can be associated with a three-dimensional geometric file. During simulation, parameters in the rigid body model are set according to actual quality parameters of all parts of the designed brake mechanical subsystem, and the specific parameters comprise part quality, mass center quality, rotational inertia and initialization parameters. The initialization parameters refer to values of the initial moment of model calculation, and mainly include names of the three-dimensional components, shapes of the three-dimensional components, colors and materials of the three-dimensional components, initial positions and postures of the three-dimensional components, lengths, widths and heights of the three-dimensional components, and other additional information of the three-dimensional components.
According to the motion relation of each component of the braking mechanical subsystem in a three-dimensional space, a kinematic pair (such as a sliding pair, a revolute pair, a universal joint, a spherical hinge and the like) is arranged between Modelica dynamic simulation models of each component of the braking mechanical subsystem, and meanwhile, the motion direction and initial motion information of the kinematic pair are also set, wherein the initial motion information comprises an initial position, a speed and the like. For the kinematic pair needing to be added with the drive, an additional interface is needed to be arranged, and an external mechanical interface is generated for transmitting force and displacement information.
The parameters of the attitude conversion module comprise relative position and attitude, and mainly determine the relative position and attitude relationship between adjacent parts of the braking mechanical subsystem. The parameters of the world module comprise the gravity acceleration and the acting direction thereof, and mainly determine the gravity field parameters of the current simulation environment.
Fig. 5 shows a system simulation model library constituted by the respective subsystem simulation model libraries.
Step five: and constructing a simulation model of the aircraft landing gear braking system by using the brake control subsystem model, the brake hydraulic subsystem model and the brake mechanical subsystem model based on a physical topological structure of the aircraft landing gear braking system.
As shown in fig. 1, a model-driven bottom-up integration process is based on a model language, part, component and subsystem models of an aircraft landing gear braking system are respectively constructed based on a Modelica language, and a simulation model of the aircraft landing gear braking system is established by adopting a drag-type modeling according to a physical topological structure of the aircraft landing gear braking system. The simulation model library comprises different models or subsystems, wherein the different models or subsystems are connected through connectors, the connectors comprise flow variables and potential variables, and the simulation model library is realized based on generalized kirchhoff law, namely the sum of the flow variables is zero, and the potential variables are equal. As shown in fig. 6, based on the built brake control subsystem model 1, brake hydraulic subsystem model 2 and brake mechanical subsystem model 3, the simulation model of the landing gear brake system of the airplane can be built by combining the principle of the landing gear brake system of the airplane and subsequently integrating other auxiliary systems (such as atmospheric environment, ground wind resistance, engine thrust reversal, dry/wet runway and the like). The brake control subsystem 1 collects feedback signals of the brake mechanical subsystem 3, activates corresponding working states through judgment, outputs instruction signals to the brake hydraulic subsystem 2, and the brake hydraulic subsystem 2 receives corresponding instruction signals and sends the instruction signals to the brake control valve to control current signals of the brake control valve, so that brake pressure is controlled, and the brake slip rate is adjusted to be close to the maximum friction coefficient all the time. And (3) building a simulation model of the aircraft landing gear braking system, and injecting system parameters to perform a simulation test of the aircraft landing gear braking system.
The invention is based on the thought of system engineering Modeling (MBSE), and completes the development of a system simulation model according to top-down system decomposition and bottom-up engineering modeling. The Modelica language is an object-oriented, equation-based and non-causal multi-field unified modeling language, and has natural advantages for constructing a large-scale complex heterogeneous model which relates to multi-discipline and multi-professional coupling of machinery, electronics, control, hydraulic pressure, pneumatics, heat and the like.
Compared with other methods, the mechanism modeling method adopted by the invention has higher model simulation precision, is closer to the actual system working state, can obviously improve the research and development efficiency of the undercarriage braking system, reduces the research and development cost, and has important significance on maintenance iteration of the undercarriage braking system.
The simulation model of the undercarriage brake system can also integrate and utilize atmospheric environment and dry/wet runway to simulate different ground environments, and whether the working performance of the simulation model of the undercarriage brake system meets the design requirements under the limit condition or not can be judged.
The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.
Claims (10)
1. A method for building a simulation model of an aircraft landing gear braking system is characterized by comprising the following steps:
decomposing the aircraft landing gear braking system to obtain a framework of the aircraft landing gear braking system;
building a brake control subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and building a brake control subsystem model by using functional modules in the brake control subsystem simulation model library;
building a brake hydraulic subsystem simulation model library based on the architecture of the aircraft landing gear brake system, and building a brake hydraulic subsystem model by using component models in the brake hydraulic subsystem simulation model library;
constructing a braking mechanical subsystem simulation model base based on the framework of the aircraft landing gear braking system, and constructing a braking mechanical subsystem model by using a Modelica dynamic simulation model of components in the braking mechanical subsystem simulation model base;
and constructing a simulation model of the aircraft landing gear braking system by using the brake control subsystem model, the brake hydraulic subsystem model and the brake mechanical subsystem model based on a physical topological structure of the aircraft landing gear braking system.
2. The method for building the simulation model of the aircraft landing gear braking system according to claim 1, wherein the aircraft landing gear braking system is decomposed into a brake control subsystem, a brake hydraulic subsystem and a brake mechanical subsystem;
the brake control subsystem is decomposed into a normal brake module, a backup brake module, an automatic brake module, an anti-skid control module and an emergency brake module;
the brake hydraulic subsystem is divided into a power source, a control valve and an actuating mechanism; the power source is decomposed into a pressure source, a flow source and a pump source, the control valve is decomposed into a brake control valve, a stop valve, a one-way valve and a shuttle valve, and the actuating mechanism is decomposed into an undercarriage brake device;
the braking mechanical subsystem is divided into a left main landing gear, a right main landing gear, a main lifting door, a front landing gear and a front lifting door.
3. The method for building the simulation model of the aircraft landing gear brake system according to claim 1, wherein the specific building process of the brake control subsystem simulation model library is as follows:
and calling each function module of the brake control subsystem in the Modelica3.2.3 standard library, and forming a brake control subsystem simulation model library by each function module.
4. The method for constructing the simulation model of the aircraft landing gear braking system according to any one of claims 1 to 3, wherein the specific construction process of the brake control subsystem model is as follows:
and constructing the brake control subsystem model by the functional modules in the brake control subsystem simulation model library based on Modelica language specifications and brake control logic.
5. The method for building the simulation model of the aircraft landing gear brake system according to claim 1, wherein the specific building process of the brake hydraulic subsystem simulation model library is as follows:
building models of all parts of the brake hydraulic subsystem, and forming a brake hydraulic subsystem simulation model library by the models of all parts; the specific construction process of each component model comprises the following steps:
based on Modelica language specification, defining a working medium, a constraint equation and an abstract interface of a component through a text layer and a graphic layer;
designing icons, parameter panels and component model description documents of components in a graphic layer;
and testing and optimizing the component model to complete the construction of the component model.
6. The method for building the simulation model of the aircraft landing gear braking system according to claim 1 or 5, wherein the specific building process of the braking hydraulic subsystem model is as follows:
defining interfaces of each component model in the brake hydraulic subsystem simulation model library, determining physical flows and signal flows of the interfaces of each component model, and connecting the interfaces of each component model according to the physical flows and the signal flows of the interfaces of the component models to form each component model;
and defining the interfaces of the component models, determining the physical flow and the signal flow of the interfaces of the component models, and connecting the interfaces of the component models according to the physical flow and the signal flow of the interfaces of the component models to form the brake hydraulic subsystem model.
7. The method for building the simulation model of the aircraft landing gear brake system according to claim 1, wherein the specific building process of the simulation model library of the brake mechanical subsystem is as follows:
building a three-dimensional model of each component of the braking mechanical subsystem by using three-dimensional software;
exporting three-dimensional models of the components by using a three-dimensional conversion plug-in to form Modelica dynamic simulation models of the corresponding components;
and opening the Modelica dynamic simulation model of each part, and forming a brake mechanical subsystem simulation model library by the Modelica dynamic simulation models of each part.
8. The method for building the simulation model of the aircraft landing gear braking system according to claim 1 or 7, wherein the specific building process of the braking mechanical subsystem model is as follows:
converting a kinematic pair between the part Modelica dynamic simulation model and the part Modelica dynamic simulation model into a Modelica language kinematic pair model;
opening the Modelica dynamic simulation model of each part, establishing a connection relation with a world module, and packaging and combining the Modelica dynamic simulation models of all the parts to obtain a dynamic simulation model of the brake mechanical subsystem;
associating each Modelica dynamic simulation model in the dynamic simulation models of the brake mechanical subsystem with a three-dimensional standard geometric file, and setting the path and the position of the three-dimensional standard geometric file to realize the visualization of the dynamic simulation models of the brake mechanical subsystem;
and setting parameters of the dynamic simulation model of the braking mechanical subsystem to complete the construction of the braking mechanical subsystem model.
9. An aircraft landing gear braking system simulation model building device, the device comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of constructing a simulation model of an aircraft landing gear braking system according to any one of claims 1 to 8 when the computer program is executed.
10. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the method for constructing a simulation model of an aircraft landing gear braking system according to any one of claims 1 to 8.
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| CN202211555159.0A CN115795682A (en) | 2022-12-06 | 2022-12-06 | Method and equipment for constructing simulation model of aircraft landing gear brake system and storage medium |
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