A method and device for constructing a vehicle braking system simulation model

Abstract

This application provides a method and apparatus for constructing a vehicle brake system simulation model. The method comprises: constructing component simulation modules for each component in the brake system using system modeling and simulation software based on the geometric structure and system parameters of the target vehicle's brake system; wherein the system parameters include the component parameters of each component in the brake system; and assembling and integrating the component simulation modules for each component according to the assembly requirements of the brake system to generate a target simulation model of the brake system. Thus, the technical solution provided by this application can effectively reduce the testing cost of vehicle brake system tests and improve testing efficiency.

Description

Technical Field

[0001] The present application relates to the field of modeling and simulation technology, and in particular to a method and device for constructing a vehicle braking system simulation model. Background Art

[0002] As one of the train's key subsystems, the braking system's performance directly impacts train safety. Urban rail train braking systems are comprised of numerous components and subsystems, each performing distinct braking functions. These components and subsystems collaborate closely with and integrate with the traction and signaling systems, creating a cohesive whole, like a vast, complex interlocking machine. During operational service, a single issue could jeopardize the safety of the entire train. Urban rail transit is characterized by shorter station distances, only approximately 1 km, compared to typical intercity trains. The high speeds of trains, the fluctuating number of passengers boarding and alighting, and the high frequency of departures necessitate reliable, advanced, and safe braking systems. In short, the braking system is one of the most complex and advanced systems in rail train equipment, one that demands the utmost reliability and safety.

[0003] Early research on braking systems relied primarily on testing, but this approach significantly increased testing costs and reduced testing efficiency. However, an accurate system model is fundamental to precise train control. By accurately estimating the internal performance parameters of the system model in real time, we can understand the real-time performance of the train, significantly optimize train scheduling efficiency, reduce train testing costs, and improve train maintenance efficiency. The train braking process, as a crucial component of ensuring train safety, deserves special attention. Therefore, focusing on the train braking process, establishing a train braking system model, and conducting fundamental research tailored to the train braking system are of great significance. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a method and device for constructing a vehicle braking system simulation model, which can effectively reduce test costs and improve test efficiency.

[0005] An embodiment of the present application provides a method for constructing a vehicle brake system simulation model, the method comprising:

[0006] Based on the geometric structure and system parameters of the brake system of the target vehicle, a component simulation module of each component in the brake system is constructed using system modeling and simulation software; wherein the system parameters include component parameters of each component in the brake system;

[0007] The component simulation modules of the components are assembled and integrated according to the assembly requirements of the brake system to generate a target simulation model of the brake system.

[0008] Optionally, the component simulation modules of each component in the braking system include: basic braking module, main air cylinder module, auxiliary braking module, brake air storage cylinder module, shut-off valve module, main (auxiliary) valve module, air supply module, and emergency braking pressure calculation module under corresponding / overload.

[0009] Optionally, constructing a component simulation module for each component in the braking system using system modeling and simulation software includes:

[0010] For each component in the braking system, module simulation construction is performed according to the schematic diagram of the component and the simulation module construction rules specified by the system modeling and simulation software to obtain a component simulation module that simulates the actual working effect of the component; wherein the simulation module construction rules include simulation module construction sequence rules and simulation module construction method rules.

[0011] Optionally, assembling and integrating the component simulation modules of the components according to the assembly requirements of the brake system to generate a target simulation model of the brake system includes:

[0012] Determining, based on assembly requirements of the brake system, the port connection relationship of each component in the brake system and the pipe parameters involved in the component connection;

[0013] According to the determined port connection relationship of each component in the brake system and the pipeline parameters involved in the component connection, the component simulation modules of each component in the brake system are sequentially connected to obtain an initial simulation model;

[0014] The initial simulation model is connected with a data processing sub-model constructed according to simulation requirements to generate a target simulation model of the braking system.

[0015] Optionally, the data processing sub-model includes an input module, an air volume calculation module, and a single vehicle body module:

[0016] The input module is used to receive simulation test parameters determined by the target user according to the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model;

[0017] The single vehicle body module is used to collect the simulation test parameters received by the target simulation model and then simulate the air braking force of each bogie output by the system, and simulate the operation of the target vehicle according to the simulated initial braking speed and vehicle load input by the target user;

[0018] The air consumption calculation module is used to determine the air consumption of the braking system.

[0019] Optionally, the target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

[0020] Optionally, the simulation test parameters include: vehicle load, brake cylinder pre-control pressure and braking conditions.

[0021] The present application also provides a device for constructing a vehicle brake system simulation model, the device comprising:

[0022] a component simulation construction unit, configured to construct a component simulation module for each component of the braking system using system modeling and simulation software based on the geometric structure and system parameters of the braking system of the target vehicle; wherein the system parameters include component parameters of each component of the braking system;

[0023] The system simulation construction unit is used to assemble and integrate the component simulation modules of the components according to the assembly requirements of the braking system to generate a target simulation model of the braking system.

[0024] Optionally, the component simulation modules of each component in the braking system include: basic braking module, main air cylinder module, auxiliary braking module, brake air storage cylinder module, shut-off valve module, main (auxiliary) valve module, air supply module, and emergency braking pressure calculation module under corresponding / overload.

[0025] Optionally, when the component simulation construction unit is used to construct component simulation modules of components in the brake system using system modeling and simulation software, the component simulation construction unit is used to:

[0026] For each component in the braking system, module simulation construction is performed according to the schematic diagram of the component and the simulation module construction rules specified by the system modeling and simulation software to obtain a component simulation module that simulates the actual working effect of the component; wherein the simulation module construction rules include simulation module construction sequence rules and simulation module construction method rules.

[0027] Optionally, when the system simulation construction unit is used to assemble and integrate the component simulation modules of the components according to the assembly requirements of the brake system to generate a target simulation model of the brake system, the system simulation construction unit is used to:

[0028] Determining, based on assembly requirements of the brake system, the port connection relationship of each component in the brake system and the pipe parameters involved in the component connection;

[0029] According to the determined port connection relationship of each component in the brake system and the pipeline parameters involved in the component connection, the component simulation modules of each component in the brake system are sequentially connected to obtain an initial simulation model;

[0030] The initial simulation model is connected with a data processing sub-model constructed according to simulation requirements to generate a target simulation model of the braking system.

[0031] Optionally, the data processing sub-model includes an input module, an air volume calculation module, and a single vehicle body module:

[0032] The input module is used to receive simulation test parameters determined by the target user according to the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model;

[0033] The single vehicle body module is used to collect the simulation test parameters received by the target simulation model and then simulate the air braking force of each bogie output by the system, and simulate the operation of the target vehicle according to the simulated initial braking speed and vehicle load input by the target user;

[0034] The air consumption calculation module is used to determine the air consumption of the braking system.

[0035] Optionally, the target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

[0036] Optionally, the simulation test parameters include: vehicle load, brake cylinder pre-control pressure and braking conditions.

[0037] An embodiment of the present application also provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the construction method as described above are performed.

[0038] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the construction method described above are executed.

[0039] The present application provides a method and apparatus for constructing a vehicle brake system simulation model. The method comprises: constructing component simulation modules for each component in the brake system using system modeling and simulation software based on the geometric structure and system parameters of the target vehicle's brake system; wherein the system parameters include the component parameters of each component in the brake system; and assembling and integrating the component simulation modules according to the assembly requirements of the brake system to generate a target simulation model of the brake system. Thus, the technical solution provided by the present application can effectively reduce the testing cost and improve the testing efficiency of vehicle brake system tests.

[0040] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A flowchart of a method for constructing a vehicle braking system simulation model provided in an embodiment of the present application;

[0043] Figure 2 A schematic structural diagram of a target simulation model of a vehicle braking system provided in this application;

[0044] Figure 3 A schematic diagram of a simulation result obtained based on a simulation model provided in this application;

[0045] Figure 4 A schematic structural diagram of a vehicle braking system simulation model construction device provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work falls within the scope of protection of the present application.

[0048] As one of the train's key subsystems, the braking system's performance directly impacts train safety. Urban rail train braking systems are comprised of numerous components and subsystems, each performing distinct braking functions. These components and subsystems collaborate closely with and integrate with the traction and signaling systems, creating a cohesive whole, like a vast, complex interlocking machine. During operational service, a single issue could jeopardize the safety of the entire train. Urban rail transit is characterized by shorter station distances, only approximately 1 km, compared to typical intercity trains. The high speeds of trains, the fluctuating number of passengers boarding and alighting, and the high frequency of departures necessitate reliable, advanced, and safe braking systems. In short, the braking system is one of the most complex and advanced systems in rail train equipment, one that demands the utmost reliability and safety.

[0049] Early research on braking systems relied primarily on testing, but this approach significantly increased testing costs and reduced testing efficiency. However, an accurate system model is fundamental to precise train control. By accurately estimating the internal performance parameters of the system model in real time, we can understand the real-time performance of the train, significantly optimize train scheduling efficiency, reduce train testing costs, and improve train maintenance efficiency. The train braking process, as a crucial component of ensuring train safety, deserves special attention. Therefore, focusing on the train braking process, establishing a train braking system model, and conducting fundamental research tailored to the train braking system are of great significance.

[0050] Based on this, the embodiments of the present application provide a method and device for constructing a vehicle braking system simulation model, which can effectively reduce test costs and improve test efficiency.

[0051] See also Figure 1 , Figure 1 Flowchart of the method for constructing a vehicle braking system simulation model provided in the embodiment of the present application. Figure 1 As shown in , the construction method provided in the embodiment of the present application includes:

[0052] S101 , constructing component simulation modules for various components in the braking system using system modeling and simulation software according to the geometric structure and system parameters of the braking system of a target vehicle.

[0053] S102 : Assembling and integrating the component simulation modules of the components according to the assembly requirements of the brake system to generate a target simulation model of the brake system.

[0054] The embodiment of the present application provides a method for constructing a vehicle braking system simulation model. According to the geometric structure and system parameters of the braking system of the target vehicle, the components of the braking system and the component parameters of each component are determined. Then, for each component, a component simulation module of the component is constructed according to the component parameters of the component through system modeling simulation software. Finally, according to the assembly requirements of the braking system and the constructed component simulation modules of each component in the braking system, corresponding connections are made to generate a target simulation model of the braking system. In this way, by designing a simulation model of the braking system, the working state of the braking system of the target vehicle can be simulated by computer processing, thereby effectively reducing the test cost and improving the test efficiency.

[0055] In step S101, the target vehicle is a vehicle having a braking system. For example, the target vehicle may be a trailer or a motor vehicle in a rail train, wherein the trailer has no power device and the motor vehicle includes a power device.

[0056] The system parameters include component parameters of each component in the braking system; the system modeling and simulation software may be AMESim software or other software, which is not limited here.

[0057] The components in the braking system include: a basic braking device, a main air cylinder, an auxiliary braking device, a brake air storage cylinder, a stop valve, a main (auxiliary) valve, a main air supply unit and an air suspension device.

[0058] The basic braking device is used to generate a mechanical force acting on the friction pair to slow down the train. For example, the basic braking device can be configured on the two bogies of the train, including a brake cylinder with a spring parking brake and a brake cylinder without a spring parking brake. During the normal operation of the train, the spring parking brake cylinder is always in a released state. After the train issues a braking command, it starts braking. The compressed air pushes the brake cylinder piston, and through the amplification effect of the lever, the pressure is finally applied to the wheels, generating friction to slow down the train. The basic braking device receives the compressed air output by the main (auxiliary) valve and the pressure output by the auxiliary braking device to release the parking brake. For example, the braking system in this scheme includes basic braking devices for two bogies.

[0059] The main air supply unit is used to provide compressed air to air-consuming equipment, including the brake system, to maintain the system's air pressure within the operating pressure range. The main air supply unit primarily includes an air compressor, a motor, and a safety valve. For example, the component parameters of the main air supply unit are set as follows: air pressure maintained within the operating pressure range of 800-950kPa; air compressor flow rate of 760L / min; and motor speed of 1450r / min.

[0060] The auxiliary brake device is used to control the parking and release states of the parking brake cylinder. The parking brake remains in the released state during normal vehicle operation and braking. The auxiliary brake device primarily includes a one-way valve, a pulse valve (used to control the parking and release states of the parking brake cylinder), a shuttle valve (which connects the higher pressure of the brake cylinder pipe pressure port connected to one of the bogie axles and the pulse valve outlet port) to the parking brake cylinder), and a shutoff valve (which controls the on / off of the pipeline).

[0061] The air suspension system is used to improve the driving stability and comfort of the vehicle.

[0062] The shut-off valve remains in an open state when the vehicle is running.

[0063] The main (auxiliary) valve is used to process the air in the brake air reservoir and deliver it to the foundation brake module at a certain pressure to meet the required air brake pressure. For example, the main (auxiliary) valve mainly includes: EP valve, initial adjustment relay valve, secondary pressure regulating valve, empty and loaded vehicle pressure limiting valve, etc.

[0064] Here, the component simulation module constructed according to the components included in the braking system includes: basic braking module, main air cylinder module, auxiliary braking module, brake air storage cylinder module, shut-off valve module, main (auxiliary) valve module, air supply module, and emergency braking pressure calculation module under corresponding / overload.

[0065] The corresponding relationship between the components and simulation modules is shown in Table 1:

[0066] Serial number Braking system components Component Simulation Module 1 Foundation brake system Foundation brake module 2 Main air cylinder Main air cylinder module 3 Auxiliary brake device Auxiliary brake module 4 Brake air reservoir Brake air reservoir module 5 stop valve Shut-off valve module 6 Main (auxiliary) valve Main (auxiliary) valve module 7 Main air supply unit Air supply module 8 Air suspension Emergency brake pressure calculation module under corresponding / overload

[0067] Here, in order for the constructed component simulation module to realize the corresponding simulation function, a data input port and / or a data output port are additionally added to the component simulation module constructed based on the physical structure of the component.

[0068] In one embodiment, the construction of component simulation modules of the components in the braking system by system modeling and simulation software in step S101 includes: performing module simulation construction according to the schematic diagram of the component and the simulation module construction rules specified by the system modeling and simulation software to obtain a component simulation module that simulates the actual working effect of the component.

[0069] Here, the simulation module construction rules include simulation module construction order rules and simulation module construction method rules.

[0070] For example, when the system modeling and simulation software is AMEsim, the system modeling and simulation software includes a working mode switching control area (Modes toolbar), a modeling area (Sketch area), and a component library (Library tree). The working mode switching control area is used to complete model building, model configuration, and model simulation. The working mode switching control area includes four working modes, namely, solution mode, sub-model mode, parameter mode, and operation mode. In this way, the simulation module construction sequence rule of the working mode switching control area is specified as solution mode → sub-model mode → parameter mode → operation mode, and the simulation module construction sequence rule also specifies the operation sequence under each mode. The simulation module construction method rule includes the construction method rule under each mode, for example, including stand-alone, double-click, drag and drop, and drawing, etc.

[0071] In one embodiment, step S102 includes:

[0072] S1021. Determine, according to assembly requirements of the brake system, the port connection relationship of each component in the brake system and the pipeline parameters involved in the component connection.

[0073] Here, the connection relationship of the ports includes the information flow and physical flow of the ports; the pipeline parameters involved in the component connection are specifically the pipeline parameters involved in the port connection between the components, and the pipeline parameters include the pipe diameter parameters and pipe length parameters involved in the component connection.

[0074] The port connection relationship of the basic brake module is as follows: it includes four ports, the first port is connected to the first port of the main (auxiliary) valve module, and is used to receive the compressed air output by the main (auxiliary) valve. The first port is also connected to the fourth port of the auxiliary brake module; the second port is connected to the second port of the main (auxiliary) valve module, and is also used to receive the compressed air output by the main (auxiliary) valve; the third port is connected to the single vehicle body module, and is used to output air braking force to the single vehicle body module; the fourth port is connected to the first port of the auxiliary brake module, and is used to receive the pressure output by the auxiliary brake module to release the parking brake. The first port, the second port, and the fourth port are mechanical connection ports, and the third port is an electrical connection port.

[0075] The port connection relationship of the main air cylinder module is as follows: it includes two ports, the first port is connected to the first port of the air supply module; the second port is connected to the second port of the auxiliary brake module. The ports of the main air cylinder module are all mechanical connection ports.

[0076] The auxiliary brake module has four ports connected as follows: a first port connected to the fourth port of the basic brake module for inputting pressure into the basic brake module; a second port connected to the second port of the main air cylinder module for receiving compressed air output from the main air cylinder module; a third port connected to the brake air reservoir module; and a fourth port connected to the first port of the basic brake module. All ports of the auxiliary brake module are mechanical connection ports.

[0077] The brake air reservoir module has two ports connected to it: a first port connected to the third port of the auxiliary brake module and the first port of the shutoff valve module, respectively; and a second port connected to the air volume calculation module. The first port is a mechanical connection port, and the second port is an electrical connection port.

[0078] The shutoff valve module has two ports connected to the brake air reservoir module. The first port is connected to the brake air reservoir module to receive compressed air output from the brake air reservoir module. The second port is connected to the third port of the main (auxiliary) valve module to input the air output from the brake air reservoir module into the main (auxiliary) valve module. Both ports of the shutoff valve module are mechanical connection ports.

[0079] The port connection relationship of the main (auxiliary) valve module is as follows: it includes 7 ports, the first port is connected to the first port of the basic brake module, and is used to input a certain pressure of gas to the basic brake module; the second port is connected to the second port of the basic brake module, and is also used to input a certain pressure of gas to the basic brake module; the third port is connected to the third port of the cut-off valve module, and is used to receive the gas output by the brake air storage cylinder module through the cut-off valve; the fourth port is connected to the first port of the emergency brake pressure calculation module under the corresponding / overload, and is used to receive the first emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload, and the first emergency brake pressure is calculated based on the vehicle load. The fifth port is connected to the second port of the emergency brake pressure calculation module under the corresponding / overload condition, and is used to receive the second emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload condition, which is the maximum limit of the emergency brake pressure of the braking system; the sixth port is connected to the first port of the input module, and is used to receive the user-defined brake cylinder pre-control pressure output by the input module; the seventh port is connected to the second port of the input module, and is used to receive the user-defined braking conditions output by the input module, which include various levels of normal braking and emergency braking, and different brake conditions correspond to different brake cylinder pre-control pressures. The first, second, and third ports are mechanical connection ports, and the fourth, fifth, sixth, and seventh ports are electrical connection ports.

[0080] The port connection relationship of the air supply module is: it includes a port, which is connected to the first port of the main air cylinder module; the port is a mechanical connection port.

[0081] The port connections of the corresponding / overload emergency brake pressure calculation module are as follows: it includes three ports: the first port is connected to the fourth port of the main (auxiliary) valve module and is used to input a first emergency brake pressure into the main (auxiliary) valve module. The first emergency brake pressure is the emergency brake pressure applied according to the vehicle load; the second port is connected to the fifth port of the main (auxiliary) valve module and is used to input a second emergency brake pressure into the main (auxiliary) valve module. The second emergency brake pressure is the maximum emergency brake pressure limit of the braking system; and the third port is connected to the third port of the input module and is used to receive the actual load of the target vehicle output by the input module. The ports of the corresponding / overload emergency brake pressure calculation module are all mechanical connection ports.

[0082] S1022: Connect component simulation modules of the components in the brake system in sequence according to the determined port connection relationship of the components in the brake system and the pipeline parameters involved in the component connection to obtain an initial simulation model.

[0083] For example, the component simulation modules of the components in the braking system may be connected in sequence according to the port correspondence relationship described in step S1021.

[0084] S1023: Use the initial simulation model to connect with the data processing sub-model constructed according to the simulation requirements to generate a target simulation model of the braking system.

[0085] In one embodiment, the data processing sub-model includes an input module, an air volume calculation module and a single vehicle body module: the input module is used to receive simulation test parameters determined by the target user according to the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model; the single vehicle body module is used to collect the air braking force of each bogie output by the simulation operation of the target simulation model, and simulate the operating conditions of the target vehicle according to the simulated braking initial velocity and vehicle load input by the target user; the air volume calculation module is used to determine the air volume of the braking system.

[0086] The simulation test parameters include vehicle load, brake cylinder pre-control pressure, and braking condition. When the braking condition is a normal braking condition, braking is applied according to the brake cylinder pre-control pressure. When the braking condition is an emergency braking condition, braking is applied according to the first emergency braking pressure calculated by the emergency braking pressure calculation module under the corresponding / overload condition.

[0087] The target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

[0088] Here, the single vehicle body module is used to output simulation data such as the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, and the deceleration of the target vehicle.

[0089] The port connection relationship of the single vehicle body module is as follows: it includes the same number of ports as the basic brake module, and the port is connected to the third port of the basic brake module to receive the air braking force output by the basic brake module. The port of the single vehicle body module is an electrical connection port.

[0090] The air usage calculation module is an optional module, and its connection to the initial simulation model can be determined based on actual circumstances. The module has a connection port that connects to the second port of the brake air reservoir module. This port is an electrical connection port. When used to determine the air usage of the brake system, the module calculates the air mass by integrating the mass flow rate of the brake air reservoir outlet pipe to obtain the air usage of the brake system.

[0091] The port connection relationship of the input module is as follows: it includes 3 ports, the first port is connected to the sixth port of the main (auxiliary) valve module, and is used to output the brake cylinder pre-control pressure to the main (auxiliary) valve module; the first port is connected to the seventh port of the main (auxiliary) valve module, and is used to output the braking condition to the main (auxiliary) valve module; the third port is connected to the third port of the emergency brake pressure calculation module under the corresponding / overload load, and is used to output the actual load of the target vehicle to the emergency brake pressure calculation module under the corresponding / overload load. The ports of the input module are all electrical connection ports.

[0092] For examples, see Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a target simulation model of a vehicle braking system provided in this application. Figure 2As shown, the target simulation model of the vehicle braking system includes two basic brake modules, a main air cylinder module, an auxiliary brake module, a brake air storage cylinder module, two shut-off valve modules, two main (auxiliary) valve modules, an air supply module, an emergency brake pressure calculation module under corresponding / overload, an input module, an air volume calculation module and a single vehicle body module. Among them, the solid line represents the mechanical connection (that is, the physical air circuit connection method), and the dotted line represents the electrical connection. It should be noted that the components included in the simulation models of the trailer and the motor vehicle are basically the same, but there are differences in the braking principles. In addition, the components of the braking systems of different target vehicles may also be different. Specifically, the target simulation model of the braking system can be constructed according to the physical structure.

[0093] For examples, see Figure 3 , Figure 3 This is a schematic diagram of a simulation result obtained based on a simulation model provided by this application. Here, the brake cylinder pre-control pressure Pset is set to 250kPa, the initial braking speed is 60km / h, and four simulation results are obtained, namely the time relationship curves of brake cylinder pressure, speed, braking deceleration and braking distance. The four simulation results can be determined by the single body module, such as Figure 3 As shown, according to the diagram in the upper left corner, it can be seen that the simulation result of the brake cylinder pressure is basically the same as the set value, which shows that this scheme can accurately verify the working condition of the vehicle's brake system through the model simulation method.

[0094] This application provides a method for constructing a vehicle brake system simulation model. The method comprises: constructing component simulation modules for each component in the brake system using system modeling and simulation software based on the geometric structure and system parameters of the target vehicle's brake system; wherein the system parameters include the component parameters of each component in the brake system; and assembling and integrating the component simulation modules for each component according to the assembly requirements of the brake system to generate a target simulation model of the brake system. Thus, the technical solution provided by this application can effectively reduce the test cost and improve the test efficiency of vehicle brake system tests.

[0095] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a vehicle braking system simulation model construction device provided in an embodiment of the present application. Figure 4 As shown in , the construction device 400 includes:

[0096] A component simulation construction unit 410 is configured to construct component simulation modules for each component of the braking system using system modeling and simulation software based on the geometric structure and system parameters of the braking system of the target vehicle; wherein the system parameters include component parameters of each component of the braking system;

[0097] The system simulation construction unit 420 is configured to assemble and integrate the component simulation modules of the components according to the assembly requirements of the brake system to generate a target simulation model of the brake system.

[0098] Optionally, the component simulation modules of each component in the braking system include: basic braking module, main air cylinder module, auxiliary braking module, brake air storage cylinder module, shut-off valve module, main (auxiliary) valve module, air supply module, and emergency braking pressure calculation module under corresponding / overload.

[0099] Optionally, when the component simulation construction unit 410 is used to construct component simulation modules of components in the brake system using system modeling and simulation software, the component simulation construction unit 410 is used to:

[0100] For each component in the braking system, module simulation construction is performed according to the schematic diagram of the component and the simulation module construction rules specified by the system modeling and simulation software to obtain a component simulation module that simulates the actual working effect of the component; wherein the simulation module construction rules include simulation module construction sequence rules and simulation module construction method rules.

[0101] Optionally, when the system simulation construction unit 420 is used to assemble and integrate the component simulation modules of the components according to the assembly requirements of the brake system to generate a target simulation model of the brake system, the system simulation construction unit 420 is used to:

[0102] Determining, based on assembly requirements of the brake system, the port connection relationship of each component in the brake system and the pipe parameters involved in the component connection;

[0103] According to the determined port connection relationship of each component in the brake system and the pipeline parameters involved in the component connection, the component simulation modules of each component in the brake system are sequentially connected to obtain an initial simulation model;

[0104] The initial simulation model is connected with a data processing sub-model constructed according to simulation requirements to generate a target simulation model of the braking system.

[0105] Optionally, the data processing sub-model includes an input module, an air volume calculation module, and a single vehicle body module:

[0106] The input module is used to receive simulation test parameters determined by the target user according to the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model;

[0107] The single vehicle body module is used to collect the simulation test parameters received by the target simulation model and then simulate the air braking force of each bogie output by the system, and simulate the operation of the target vehicle according to the simulated initial braking speed and vehicle load input by the target user;

[0108] The air consumption calculation module is used to determine the air consumption of the braking system.

[0109] Optionally, the target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

[0110] Optionally, the simulation test parameters include: vehicle load, brake cylinder pre-control pressure and braking conditions.

[0111] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown in FIG, the electronic device 500 includes a processor 510, a memory 520 and a bus 530.

[0112] The memory 520 stores machine-readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 via the bus 530. When the machine-readable instructions are executed by the processor 510, the above-mentioned Figure 1 as well as Figure 3 The specific implementation of the steps in the method embodiment shown can be found in the method embodiment and will not be repeated here.

[0113] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 as well as Figure 3 The specific implementation of the steps in the method embodiment shown can be found in the method embodiment and will not be repeated here.

[0114] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0115] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0116] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0117] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0118] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0119] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for constructing a vehicle braking system simulation model, characterized in that: The construction method comprises: Based on the geometric structure and system parameters of the braking system of the target vehicle, a component simulation module of each component in the braking system is constructed using system modeling and simulation software; the component simulation module of each component in the braking system includes: two basic brake modules configured on the bogie, a main air cylinder module, an auxiliary brake module, a brake air storage cylinder module, two shut-off valve modules, a first main / auxiliary valve module, a second main / auxiliary valve module, an air supply module, and an emergency brake pressure calculation module under corresponding / overload conditions; the first main / auxiliary valve module and the second main / auxiliary valve module both have correspondingly connected basic brake modules and shut-off valve modules; Connecting the component simulation modules of the components according to the assembly requirements of the brake system to generate an initial simulation model of the brake system; and correspondingly connecting the initial simulation model with a data processing sub-model constructed according to the simulation requirements to generate a target simulation model of the brake system; The port connection relationship of the first main / auxiliary valve module or the second main / auxiliary valve module is as follows: it includes seven ports, the first port is connected to the first port of the basic brake module, and is used to input gas of predetermined pressure to the basic brake module; the second port is connected to the second port of the basic brake module, and is also used to input gas of predetermined pressure to the basic brake module; the third port is connected to the second port of the cut-off valve module, and is used to receive the gas output by the brake air storage cylinder module through the cut-off valve; the fourth port is connected to the first port of the emergency brake pressure calculation module under the corresponding / overload load, and is used to receive the first emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload load, and the first emergency brake pressure is the emergency brake pressure applied according to the vehicle load; the fifth port is connected to the second port of the corresponding / overload load The second port of the emergency brake pressure calculation module is connected to receive the second emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload condition, where the second emergency brake pressure is the maximum limit of the emergency brake pressure of the braking system; the sixth port is connected to the first port of the input module, where the sixth port is connected to receive the user-defined brake cylinder pre-control pressure output by the input module; the seventh port is connected to the second port of the input module, where the seventh port is connected to the second port of the input module, where the seventh port is connected to receive the user-defined braking condition output by the input module, where the braking condition includes various levels of normal braking and emergency braking, and different braking conditions correspond to different brake cylinder pre-control pressures; wherein the first port, the second port and the third port are mechanical connection ports, and the fourth port, the fifth port, the sixth port and the seventh port are electrical connection ports; The port connection relationship of the emergency brake pressure calculation module under corresponding / overload is as follows: it includes three ports, a first port is connected to the fourth port of the first main / auxiliary valve module and the second main / auxiliary valve module, and is used to input the first emergency brake pressure to the first main / auxiliary valve module and the second main / auxiliary valve module; the second port is connected to the fifth port of the first main / auxiliary valve module and the second main / auxiliary valve module, and is used to input the second emergency brake pressure to the first main / auxiliary valve module and the second main / auxiliary valve module; the third port is connected to the third port of the input module, and is used to receive the actual load of the target vehicle output by the input module; the ports of the emergency brake pressure calculation module under corresponding / overload are all mechanical connection ports; The data processing sub-model includes an input module, an air volume calculation module, and a single vehicle body module: The input module is configured to receive simulation test parameters determined by a target user based on the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model; the simulation test parameters include: vehicle load, brake cylinder pre-control pressure, and braking condition; wherein, when the braking condition is a normal braking condition, braking is applied according to the brake cylinder pre-control pressure; when the braking condition is an emergency braking condition, braking is applied according to the first emergency braking pressure calculated by the emergency braking pressure calculation module under the corresponding / overload condition; the first emergency braking pressure is the emergency braking pressure applied according to the vehicle load; The single vehicle body module is used to collect the air braking force of each bogie output by the system simulation operation after the simulation test parameters received by the target simulation model are collected, and simulate the operation of the target vehicle according to the simulated initial braking speed and vehicle load input by the target user; the single vehicle body module is also used to output the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, and the deceleration simulation data of the target vehicle; the single vehicle body module includes the same number of ports as the basic brake module; The air volume calculation module is used to determine the air volume of the braking system; the air volume calculation module is an optional module; The target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

2. A device for constructing a vehicle braking system simulation model, characterized in that: The construction device comprises: A component simulation construction unit is used to construct component simulation modules of various components in the braking system using system modeling and simulation software based on the geometric structure and system parameters of the braking system of the target vehicle; the component simulation modules of various components in the braking system include: two basic brake modules configured on the bogie, a main air cylinder module, an auxiliary brake module, a brake air storage cylinder module, two shut-off valve modules, a first main / auxiliary valve module, a second main / auxiliary valve module, an air supply module, and an emergency brake pressure calculation module under corresponding / overload conditions; the first main / auxiliary valve module and the second main / auxiliary valve module both have correspondingly connected basic brake modules and shut-off valve modules; a system simulation construction unit, configured to connect the component simulation modules of the components according to the assembly requirements of the brake system to generate an initial simulation model of the brake system; and to connect the initial simulation model with a data processing sub-model constructed according to the simulation requirements to generate a target simulation model of the brake system; The port connection relationship of the first main / auxiliary valve module or the second main / auxiliary valve module is as follows: it includes seven ports, the first port is connected to the first port of the basic brake module, and is used to input gas of predetermined pressure to the basic brake module; the second port is connected to the second port of the basic brake module, and is also used to input gas of predetermined pressure to the basic brake module; the third port is connected to the second port of the cut-off valve module, and is used to receive the gas output by the brake air storage cylinder module through the cut-off valve; the fourth port is connected to the first port of the emergency brake pressure calculation module under the corresponding / overload load, and is used to receive the first emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload load, and the first emergency brake pressure is the emergency brake pressure applied according to the vehicle load; the fifth port is connected to the second port of the corresponding / overload load The second port of the emergency brake pressure calculation module is connected to receive the second emergency brake pressure output by the emergency brake pressure calculation module under the corresponding / overload condition, where the second emergency brake pressure is the maximum limit of the emergency brake pressure of the braking system; the sixth port is connected to the first port of the input module, where the sixth port is connected to receive the user-defined brake cylinder pre-control pressure output by the input module; the seventh port is connected to the second port of the input module, where the seventh port is connected to the second port of the input module, where the seventh port is connected to receive the user-defined braking condition output by the input module, where the braking condition includes various levels of normal braking and emergency braking, and different braking conditions correspond to different brake cylinder pre-control pressures; wherein the first port, the second port and the third port are mechanical connection ports, and the fourth port, the fifth port, the sixth port and the seventh port are electrical connection ports; The port connection relationship of the emergency brake pressure calculation module under corresponding / overload is as follows: it includes three ports, a first port is connected to the fourth port of the first main / auxiliary valve module and the second main / auxiliary valve module, and is used to input the first emergency brake pressure to the first main / auxiliary valve module and the second main / auxiliary valve module; the second port is connected to the fifth port of the first main / auxiliary valve module and the second main / auxiliary valve module, and is used to input the second emergency brake pressure to the first main / auxiliary valve module and the second main / auxiliary valve module; the third port is connected to the third port of the input module, and is used to receive the actual load of the target vehicle output by the input module; the ports of the emergency brake pressure calculation module under corresponding / overload are all mechanical connection ports; The data processing sub-model includes an input module, an air volume calculation module, and a single vehicle body module: The input module is configured to receive simulation test parameters determined by a target user based on the actual operating conditions of the target vehicle, and input the simulation test parameters into the target simulation model; the simulation test parameters include: vehicle load, brake cylinder pre-control pressure, and braking condition; wherein, when the braking condition is a normal braking condition, braking is applied according to the brake cylinder pre-control pressure; when the braking condition is an emergency braking condition, braking is applied according to the first emergency braking pressure calculated by the emergency braking pressure calculation module under the corresponding / overload condition; the first emergency braking pressure is the emergency braking pressure applied according to the vehicle load; The single vehicle body module is used to collect the air braking force of each bogie output by the system simulation operation after the simulation test parameters received by the target simulation model are collected, and simulate the operation of the target vehicle according to the simulated initial braking speed and vehicle load input by the target user; the single vehicle body module is also used to output the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, and the deceleration simulation data of the target vehicle; the single vehicle body module includes the same number of ports as the basic brake module; The air volume calculation module is used to determine the air volume of the braking system; the air volume calculation module is an optional module; The target simulation model is used to simulate and calculate the following items: the brake cylinder pressure of the target vehicle, the driving speed of the target vehicle, the braking distance of the target vehicle, the deceleration of the target vehicle, and the air consumption of the braking system.

3. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to execute the steps of the construction method as described in claim 1.

4. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which, when executed by a processor, executes the steps of the construction method according to claim 1.

Images