CN113085807B - Train braking method and device, electronic equipment and storage medium - Google Patents
Train braking method and device, electronic equipment and storage medium Download PDFInfo
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- CN113085807B CN113085807B CN202110375990.7A CN202110375990A CN113085807B CN 113085807 B CN113085807 B CN 113085807B CN 202110375990 A CN202110375990 A CN 202110375990A CN 113085807 B CN113085807 B CN 113085807B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
- B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H11/00—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types
- B61H11/06—Applications or arrangements of braking or retarding apparatus not otherwise provided for; Combinations of apparatus of different kinds or types of hydrostatic, hydrodynamic, or aerodynamic brakes
- B61H11/10—Aerodynamic brakes with control flaps, e.g. spoilers, attached to the vehicles
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- Regulating Braking Force (AREA)
Abstract
The embodiment of the application provides a train braking method, a train braking device, electronic equipment and a storage medium, which are applied to a train braking system, wherein the train braking system comprises a brake cylinder, and the method comprises the following steps: obtaining a target braking force value according to the received electric idle speed change braking instruction, and calculating a compensation dynamic value of the train; and after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value. The air braking force of the train can be increased by performing pressure compensation on the brake cylinder through the compensation momentum value, so that the problem of braking force loss caused by slow response speed of air braking in the process of switching between electric braking and air braking is effectively solved, the deceleration requirement of vehicle parking is met, and the vehicle can be stably parked in a parking area.
Description
Technical Field
The present application relates to rail transit technology, and in particular, to a train braking method, apparatus, electronic device, and storage medium.
Background
At present, the vast majority of rail transit train braking force sources are mainly electric braking force provided by a train traction system and air braking force provided by a train braking system. The common braking, the quick braking and other functions of the train adopt an electric-air hybrid braking mode, the basic principle of the electric-air hybrid braking is that electric braking is preferentially used, when the electric braking force cannot meet the braking requirement, air braking is used for complementing, when the train enters a low-speed running stage to prepare for stopping, as the electric braking cannot be played again, the electric idle running is changed at the moment, and the air braking completely replaces the electric braking.
In the actual operation process of the vehicle, due to the characteristics of quick response of the electric brake and slow response of the air brake, the electric brake and the air brake cannot be switched at the same time according to the theoretically same slope, so that the vehicle can have slight pause and frustration, and the riding comfort is influenced. In addition, after the electric brake is released, the braking force is lost due to slow response of the air brake, and the air brake may not reach the target braking force value required by the train automatic driving system, so that the deceleration of the vehicle cannot reach the target deceleration, and the vehicle cannot be accurately stopped in the parking area.
Disclosure of Invention
The embodiment of the application provides a train braking method, a train braking device, electronic equipment and a storage medium, and is used for solving the problem that the train cannot be stably and accurately stopped at present.
According to a first aspect of embodiments of the present application, there is provided a train braking method applied to a train braking system including a brake cylinder, the method including:
receiving an electric idle change brake command;
obtaining a target braking force value according to a received electric idle braking conversion instruction, and calculating a compensation dynamic force value of the train, wherein the compensation dynamic force value represents the momentum of the brake cylinder which is lacked in the process of reaching the target braking force corresponding to the target braking force value;
and after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value.
According to a second aspect of the embodiments of the present application, there is provided a train braking system including a brake cylinder, the apparatus including:
the receiving module is used for receiving an electric idle conversion braking instruction;
the calculation module is used for obtaining a target braking force value according to the received electric idle braking switching instruction and calculating a compensation dynamic force value of the train, wherein the compensation dynamic force value represents the momentum of the brake cylinder which is lost in the process of reaching the target braking force corresponding to the target braking force value;
and the pressure compensation module is used for performing pressure compensation on the brake cylinder according to the compensation momentum value after the air braking force value of the train reaches a target braking force value.
According to a third aspect of embodiments of the present application, there is provided an electronic apparatus, including: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine-readable instructions when executed by the processor performing a train braking method.
According to a fourth aspect of embodiments of the present application, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, performs a train braking method.
The train braking method, the train braking device, the electronic equipment and the storage medium are applied to a train braking system, the train braking system comprises a brake cylinder, and the method comprises the following steps: obtaining a target braking force value according to the received electric idle braking conversion instruction, and calculating a compensation dynamic force value of the train, wherein the compensation dynamic force value represents the momentum of the brake cylinder which is lacked in the process of reaching the target braking force corresponding to the target braking force value; and after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value. The air braking force of the train can be increased by performing pressure compensation on the brake cylinder through the compensation momentum value, so that the problem of braking force loss caused by slow response speed of air braking in the process of switching between electric braking and air braking is effectively solved, the deceleration requirement of vehicle parking is met, and the vehicle can be stably parked in a parking area.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of a train braking method provided by an embodiment of the present application;
fig. 2 is a second flowchart of a train braking method according to an embodiment of the present application;
fig. 3 is a flowchart illustrating sub-steps of step S12 according to an embodiment of the present disclosure;
fig. 4 is a flowchart illustrating sub-steps of step S13 according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating an air braking force value versus time according to an embodiment of the present disclosure;
FIG. 6 is a functional block diagram of a train braking side device provided by an embodiment of the present application;
fig. 7 is a schematic view of an electronic device provided in an embodiment of the present application.
Detailed Description
The train brake system generally has a plurality of functions such as service brake, emergency brake, parking brake, etc., and in the actual operation of the vehicle, the service brake function is used most. Service braking generally comprises electric braking and air braking, wherein the electric braking is preferentially applied after a braking system receives a service braking command, and the air braking is applied for supplement when the electric braking is insufficient. At the low speed stage of the vehicle, because the electric brake can not be exerted any more, the electric idle running is replaced at the moment, and the air brake is used for completely replacing the electric brake.
Generally, the service brake of the brake system applies electric brake preferentially to reduce the abrasion of air brake and achieve the purposes of energy conservation and environmental protection. When the subway vehicle is about to enter a station and the speed is generally 8km/h or lower, the brake system can carry out the conversion of electric brake and air brake, namely the electric brake is completely withdrawn, the air brake is used for supplementing the missing brake force, and the stable parking of the vehicle is ensured.
After the vehicle meets the condition of switching between electric braking and air braking, the network system can send out an electric-air switching instruction to the train traction system and the train braking system, and after the train traction system receives the instruction, the electric braking force is controlled to be reduced by a certain slope value until the slope value is reduced to 0; after the train braking system receives the instruction, the air braking force is controlled to increase with the same slope value until the target value is reached, when the increasing slope of the air braking force is the same as the decreasing slope of the electric braking force, the electric braking and the air braking of the vehicle can be stably switched, so that the vehicle can be accurately stopped in a targeted mode, and the vehicle can not be stopped in a pause and contusion mode.
In the process of implementing the present application, the inventor finds that, in the actual running process of a train, due to the characteristics that the electric brake response is fast and the air brake response is slow, the electric brake response and the air brake response cannot be switched simultaneously according to the theoretically same slope, so that the vehicle can have a slight pause phenomenon, and the riding comfort is affected. And because the conversion time of the electric brake and the air brake is very short, even if the exit time of the electric brake is delayed and the air brake is applied in advance, the problem of slow response of the air brake cannot be solved well.
In addition, after the electric brake is released, the braking force is lost due to slow response of the air brake, and the air brake may not reach the target braking force value required by the train automatic driving system, so that the deceleration of the vehicle cannot reach the target deceleration, and the vehicle cannot be accurately stopped in the parking area.
Therefore, in view of the above problems, embodiments of the present application provide a train braking method, apparatus, electronic device and storage medium, which are applied to a train braking system, where the train braking system includes a brake cylinder, and the method includes: obtaining a target braking force value according to the received electric idle speed change braking instruction, and calculating a compensation dynamic value of the train; and after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value. The air braking force of the train can be increased by performing pressure compensation on the brake cylinder through the compensation momentum value, so that the problem of braking force loss caused by slow response speed of air braking in the process of switching between electric braking and air braking is effectively solved, the deceleration requirement of vehicle parking is met, and the vehicle can be stably parked in a parking area.
The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a flowchart of a train braking method according to an embodiment of the present disclosure. In this embodiment, the train braking method is applied to a train braking system, the train braking system including a brake cylinder, and the method includes:
in step S11, an electric idle brake change command is received.
And step S12, obtaining a target braking force value according to the received electric idle braking conversion command, and calculating a compensation dynamic force value of the train. And the compensation momentum value represents the momentum which is lacked in the process that the brake cylinder reaches the target braking force corresponding to the target braking force value.
And step S13, after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value.
According to the embodiment of the application, the problem that braking force is lost due to slow response speed of air braking in the process of switching between electric braking and air braking can be effectively solved by performing pressure compensation on the brake cylinder through compensating the momentum value, so that the deceleration requirement of vehicle parking is met, and the vehicle can be stably parked in a parking area.
Further, the requirement of the train automatic driving system for switching between the electric brake and the air brake is more strict in the parking process, after the electric brake is quitted, if the air brake does not reach the target pressure value, the train automatic driving system can detect that the current deceleration of the vehicle does not reach the target deceleration, the train automatic driving system can increase the braking force requirement for improving the deceleration of the vehicle, after the air brake is increased to the target braking force, the train automatic driving system can detect that the current deceleration of the vehicle is larger than the target deceleration, and the train automatic driving system can immediately reduce the braking force requirement, so that repeated operation is carried out, the vehicle is always in a pause phenomenon, and the vehicle cannot be guaranteed to be accurately parked in a parking area.
Therefore, to solve the above problem, please refer to fig. 2, and fig. 2 is a second flowchart of a train braking method according to an embodiment of the present application. In this embodiment, the train braking method further includes:
and step S14, feeding back the pressure compensation time period corresponding to the pressure compensation to the train automatic driving system.
Step S15, judging whether the current time is in the pressure compensation time period through the automatic train driving system; and if so, stopping the train automatic driving system from sending a braking instruction to the train braking system.
In the above steps, when pressure compensation is performed on the brake cylinder, the train braking system sends a pressure compensation time period corresponding to the pressure compensation of the train to the train automatic driving system, and if the current time is within the pressure compensation time period, the train driving system does not send a braking instruction to the train braking system, that is, adjustment of the braking force is not performed, so that the integrity of the train in the braking process is ensured, the target deceleration required by the train automatic driving system is achieved, and meanwhile, the phenomenon of pause and contusion of the train in the braking process is avoided.
Optionally, referring to fig. 3, fig. 3 is a flowchart illustrating a sub-step of step S12 according to an embodiment of the present disclosure. In this embodiment, the step S12 of obtaining the target braking force value according to the received electric idle braking conversion command and calculating the compensation momentum value of the train includes:
and step S121, analyzing the received electric idle braking change instruction to obtain a target braking force value.
And step S122, calculating a target dynamic quantity value of the train according to the target braking force value.
And step S123, calculating the actual dynamic quantity value of the train according to the functional relation between the air braking force value and the time.
Step S124, calculating the compensation momentum value of the train according to the target momentum value and the actual momentum value.
When the train braking system carries out electric braking and air braking conversion, the train braking system receives an electric idling braking changing instruction sent by the train automatic driving system and analyzes the electric idling braking changing instruction, and a target braking force value required by the train automatic driving system can be obtained.
Further, in this embodiment, the step S122 of calculating the target dynamic quantity value of the train according to the target braking force value includes:
calculating a first preset time period required for the air braking force value of the train to reach the target braking force value according to the functional relation between the air braking force value and time; and calculating the product of the target braking force and the first preset time period to obtain the target momentum value.
Specifically, in the present embodiment, generally, after the vehicle is assembled and debugged, the pressure rising curve of the brake cylinder of the train brake system is fixed, and the air brake force value can be obtained by calculating the pressure of the brake cylinder according to the following formula:
FB＝pC*iD+jD
wherein, FBIs the value of air braking force, pCAs pressure of brake cylinder, iDIs the pressure/coupling coefficient of the brake cylinder, jDIs an additional value based on the movement position of the piston.
Therefore, it can be understood that the functional relationship between the air braking force value and the time is also fixed after the vehicle assembly and commissioning is completed. In one possible embodiment, the air brake force value as a function of time may be:
F(t)＝-22.65t2+66.3t-1.12
where t represents time in seconds and F represents an air braking force value in kilo-newtons (KN).
Thus, according to the formula: f (t) ═ 22.65t2+66.3t-1.12 the air braking force value of the train reaching the target braking force value F can be calculatedSBA first predetermined time period, i.e. 0 to t, is required1A corresponding time period.
At the time of obtaining t1Thereafter, the following can be done according to the formula: pTarget＝FSB*t1Calculating the air braking force value of the train to reach the target braking force value FSBThe required target momentum value.
After the target momentum value of the train is obtained through calculation, the actual momentum value of the train can be calculated according to the functional relation between the air braking force value and the time.
In this embodiment, since the air brake response is slow, the air brake force value of the train cannot reach the target brake force value instantaneously according to the theoretical situation, and a part of momentum loss occurs. Thus, the following can be expressed according to the formula: f (t) ═ 22.65t2+66.3t-1.12 calculates the actual momentum of the train, i.e.:
wherein, PPractice ofFor trains from 0 to t1Actual momentum value (within a first preset time period).
Then can be based on the target momentum value PTargetAnd an actual momentum value PPractice ofCalculating compensation dynamic value P of trainCompensationWherein P isCompensation＝PTarget-PPractice of。
In the present embodiment, the compensation momentum value P is obtained in calculationCompensationAnd then, pressure compensation is carried out on the brake cylinder according to the momentum conservation law, the missing momentum is compensated by increasing the pressure of the brake cylinder, and the sum of the compensation momentum value and the actual momentum value is the same as the target momentum value.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating a sub-step of step S13 according to an embodiment of the present disclosure. In the present embodiment, step S13 includes:
and a substep S131, after the air braking force value of the train reaches the target braking force value, increasing the pressure value of the brake cylinder so as to increase the air braking force value of the train to the preset braking force value within a second preset time period.
And a substep S132 of reducing the pressure value of the brake cylinder after the air braking force value of the train reaches the preset braking force value, so that the air braking force value of the train is reduced to the target braking force value within a third preset time period.
In the above sub-step, since a part of the braking force is lost due to slow response of the air brake, the part of the braking force needs to be compensated, and the air brake force value and the pressure of the brake cylinder can be switched to each other, so that the pressure of the brake cylinder needs to be increased if the air brake force value is to be increased.
Therefore, in the pressure compensation, after the air braking force value of the train reaches the target braking force value, the air braking force value can be increased by increasing the pressure of the brake cylinder, so that the air braking force value of the train is increased to the preset braking force value within the second preset time periodPower value FEB。
The air braking force value required by the automatic train driving system is the target braking force value FSBThus, when the air braking force value reaches the preset braking force value FEBThereafter, it is also necessary to reduce the pressure value of the brake cylinder (to reduce the pressure value of the brake cylinder to the target braking force value F)SBCorresponding pressure value) to enable the air braking force value of the train to be recovered to the target braking force value F within a third preset time periodSB。
Referring to fig. 4, in the present embodiment, before step S132, step S13 may further include:
and step S133, keeping the pressure value of the brake cylinder unchanged so as to maintain the air braking force value of the train as a preset braking force value in a fourth preset time period.
In the above step, in order to compensate for the missing momentum value in the shortest possible time period, the air braking force value of the train may reach the preset braking force value FEBAnd then, controlling the pressure of the brake cylinder to be unchanged, and keeping the air braking force value of the train to be the preset braking force value F all the time in a fourth preset time periodEBIn this way, the pressure compensation can be completed as quickly as possible when the compensation momentum value is large.
Alternatively, in an embodiment, the preset braking force value may be a maximum braking force value corresponding to the maximum pressure value of the brake cylinder, and the train braking system may calculate the maximum braking force value of the train according to the load information of the train.
For better understanding of the above steps, the following detailed description is made with reference to fig. 5, and fig. 5 is a schematic diagram of the relationship between the air braking force value and the time provided by the embodiment of the present application. In FIG. 5, FSBIs a target braking force value of the train, FEBFor a predetermined braking force value, 0 to t1Is a first predetermined time period, t1To t2For a second predetermined period of time, t2To t3For a fourth predetermined period of time, t3To t4Is a third preset time period.
Train brake system idling after receiving electricityAfter the braking command is changed, the pressure of the brake cylinder is increased to increase the air braking force of the train, and the air braking force value of the train is t1Reaches the target braking force value F at any momentSBThen, the pressure of the brake cylinder is continuously increased, so that the air braking force of the train is continuously increased until t2Reaches the preset braking force value F at any momentEBThen keeping the pressure of the brake cylinder unchanged to make the braking force value of the train at t2To t3Is maintained at a preset braking force value F for a period of timeEBThen the pressure of the brake cylinder is quickly reduced to quickly enable the air braking force value of the train to be changed from the preset braking force value FEBDown to the target braking force value FSBAnd completing pressure compensation.
Alternatively, in this embodiment, as shown in fig. 5, the compensation motion amount value is the area of the shaded portion in fig. 5, and therefore, t may be calculated according to the magnitude of the compensation motion amount value and the pressure time characteristic of the brake cylinder2、t3And t4The size of (2). Specifically, in this embodiment, the train braking method further includes:
calculating a second preset time period required for increasing the air braking force value of the train from the target braking force value to the preset braking force value according to the functional relation between the air braking force value and time; and calculating the third preset time period and the fourth preset time period according to the compensation momentum value, the first preset time period and the second preset time period.
Specifically, in the present embodiment, t1The value of (d) can be according to the formula: f (t) ═ 22.65t2+66.3t-1.12, at calculation t1When F (t) is a target braking force value FSB。
t2The value of (c) can also be according to the formula: f (t) ═ 22.65t2+66.3t-1.12, at calculation t2F (t) is a predetermined braking force value FEB。
In general, the braking force F due to airEBDown to FSBThe time required is short, i.e. t3And t4The difference between them is small and can be regarded as a straight line, not a curve, and thereforeAt the calculation of t3、t4Then, can be according to the formula:
Pcompensation＝PTarget-PPractice of
PTarget＝FSB*t1
Wherein, FSB、FEBIs a known value, t1、t2Can be calculated according to a formula, and therefore, t can be calculated according to the formula3、t4。
Obtaining t in the calculation1、t2、t3、t4Then, a first preset time period, a second preset time period, a third preset time period and a fourth preset time period can be obtained, so that the process of pressure compensation is controlled, and in addition, the pressure compensation is carried out at t1-t4And in a time period, the train braking system feeds the air braking force value at the current moment and the current moment back to the train automatic driving system in real time, so that the train automatic driving system cannot generate a new braking instruction due to the change of the air braking force in the pressure compensation period, namely the train automatic driving system does not participate in the pressure compensation process of the train braking system.
In the present embodiment, the preset braking force value may be the maximum braking force value or may be any value between the target braking force value and the maximum braking force value. Similarly, the fourth preset time period during which the preset braking force value is maintained may not exist, but directly and rapidly decreases to the target braking force value after the braking force value reaches the preset braking force value, that is, t obtained through calculation2And t3Are equal.
In summary, the embodiment of the present application provides a train braking method, which is used for increasing an air braking force in a calculated compensation time when air braking is applied, and feeding back the air braking force to an automatic train driving system, so that the train driving system does not adjust the air braking force in the time. By the method, the braking force lost due to slow response of air braking can be compensated, and stable and accurate parking of the vehicle is realized.
Referring to fig. 6, fig. 6 is a functional block diagram of a train braking side device according to an embodiment of the present application, in this embodiment, a train braking side device 110 is applied to a train braking system, the train braking system includes a brake cylinder, and the train braking side device 110 includes:
the receiving module 1101 is configured to receive an electric idle braking instruction.
The calculating module 1102 is configured to obtain a target braking force value according to the received electric idle braking switching instruction, and calculate a compensation dynamic force value of the train, where the compensation dynamic force value represents a momentum which is missing in a process that the brake cylinder reaches a target braking force corresponding to the target braking force value;
and the pressure compensation module 1103 is configured to perform pressure compensation on the brake cylinder according to the compensation momentum value after the air braking force value of the train reaches a target braking force value.
Referring to fig. 7, fig. 7 is a schematic view of an electronic device 10 provided in the embodiment of the present application. In the present embodiment, the electronic device 10 includes: the train braking system comprises a processor 11, a memory 12 and a bus 13, wherein the memory 12 stores machine readable instructions executable by the processor 11, when the electronic device 10 runs, the processor 11 communicates with the memory 12 through the bus 13, and the machine readable instructions are executed by the processor 11 to execute the train braking method provided by the embodiment of the application.
Optionally, an embodiment of the present application further provides a storage medium, where a computer program is stored on the storage medium, and when the computer program is executed by the processor 11, the train braking method provided in the embodiment of the present application is executed.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A train braking method applied to a train braking system including a brake cylinder, the method comprising:
receiving an electric idle change brake command;
obtaining a target braking force value according to a received electric idle braking conversion instruction, and calculating a compensation dynamic force value of the train, wherein the compensation dynamic force value represents the momentum of the brake cylinder which is lacked in the process of reaching the target braking force corresponding to the target braking force value;
and after the air braking force value of the train reaches the target braking force value, performing pressure compensation on the brake cylinder according to the compensation momentum value.
2. The method of claim 1, further comprising:
feeding back the pressure compensation time period corresponding to the pressure compensation to an automatic train driving system;
judging whether the current moment is within the pressure compensation time period or not through the train automatic driving system; and if so, stopping the automatic train driving system from sending a braking instruction to the train braking system.
3. The method of claim 1, wherein obtaining a target braking force value based on the received electric idle swap braking command and calculating a compensation force value for the train comprises:
analyzing the received electric idle braking change instruction to obtain a target braking force value;
calculating a target dynamic quantity value of the train according to the target braking force value;
calculating the actual dynamic quantity value of the train according to the functional relation between the air braking force value and the time;
and calculating the compensation momentum value of the train according to the target momentum value and the actual momentum value.
4. The method of claim 3, wherein said calculating a target momentum value for the train from the target braking force value comprises:
calculating a first preset time period required for the air braking force value of the train to reach the target braking force value according to the functional relation between the air braking force value and time;
and calculating the product of the target braking force value and the first preset time period to obtain the target braking force value.
5. The method of claim 1, wherein the pressure compensating the brake cylinder according to the compensation momentum value after the air braking force value of the train reaches a target braking force value comprises:
after the air braking force value of the train reaches a target braking force value, increasing the pressure value of the brake cylinder so as to increase the air braking force value of the train to a preset braking force value within a second preset time period;
after the air braking force value of the train reaches the preset braking force value, reducing the pressure value of the brake cylinder so that the air braking force value of the train is reduced to the target braking force value within a third preset time period.
6. The method of claim 5, wherein the pressure compensating the brake cylinder according to the compensation momentum value after the air braking force value of the train reaches the target braking force value, further comprising:
controlling the pressure value of the brake cylinder to be kept unchanged before reducing the pressure value of the brake cylinder to reduce the air braking force value of the train to the target braking force value in a third preset time period, so that the air braking force value of the train is maintained as the preset braking force value in a fourth preset time period.
7. The method of claim 6, further comprising:
calculating a second preset time period required for increasing the air braking force value of the train from the target braking force value to the preset braking force value according to the functional relation between the air braking force value and time;
and calculating the third preset time period and the fourth preset time period according to the compensation momentum value, the first preset time period and the second preset time period.
8. A train braking system device for use in a train braking system, the train braking system including a brake cylinder, the device comprising:
the receiving module is used for receiving an electric idle conversion braking instruction;
the calculation module is used for obtaining a target braking force value according to the received electric idle braking switching instruction and calculating a compensation dynamic force value of the train, wherein the compensation dynamic force value represents the momentum of the brake cylinder which is lost in the process of reaching the target braking force corresponding to the target braking force value;
and the pressure compensation module is used for performing pressure compensation on the brake cylinder according to the compensation momentum value after the air braking force value of the train reaches a target braking force value.
9. An electronic device, comprising: a processor, a memory and a bus, the memory storing machine-readable instructions executable by the processor, the processor and the memory communicating over the bus when the electronic device is operating, the machine-readable instructions when executed by the processor performing the method of any of claims 1-7.
10. A storage medium, having stored thereon a computer program which, when executed by a processor, performs the method according to any one of claims 1-7.
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