CN117799590A - Brake pressure control method, brake pressure control system, brake device and medium for rolling stock - Google Patents
Brake pressure control method, brake pressure control system, brake device and medium for rolling stock Download PDFInfo
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- CN117799590A CN117799590A CN202410168554.6A CN202410168554A CN117799590A CN 117799590 A CN117799590 A CN 117799590A CN 202410168554 A CN202410168554 A CN 202410168554A CN 117799590 A CN117799590 A CN 117799590A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 36
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- 238000007599 discharging Methods 0.000 claims abstract description 79
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- 238000004378 air conditioning Methods 0.000 claims description 8
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Abstract
The application discloses a method, a system, a braking device and a medium for controlling braking pressure of a locomotive, and belongs to the technical field of locomotive braking technology. The braking pressure control method of the rolling stock is applied to an air braking device, the air braking device comprises at least two parallel charging electric air valves and at least two parallel discharging electric air valves, the flow paths of any two charging electric air valves are unequal, the flow paths of any two discharging electric air valves are unequal, and the air braking device further comprises an air compressor and a pre-control air cylinder; the brake pressure control method of the rolling stock comprises the following steps: and generating an electric air valve control strategy according to the pressure difference value, and controlling the air charging electric air valve and/or the air discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach a target braking pressure value. The method and the device can improve the brake pressure control precision and response efficiency and prolong the service life of the electric air valve.
Description
Technical Field
The present disclosure relates to the field of locomotive braking technologies, and in particular, to a method, a system, a braking device, and a medium for controlling braking pressure of a locomotive.
Background
Air braking is one of the main braking modes of rolling stock, and takes compressed air as braking motive power to change the pressure of the compressed air to control the rolling stock to brake.
The air brake of the rolling stock needs to work cooperatively with the pre-control air cylinder, the relay valve and the brake cylinder. The pre-control reservoir is typically connected to an air compressor and a main reservoir to provide a stable supply of pressurized air to the brake system. When a braking command is sent, the pre-control air cylinder releases stored pressure air to provide power for braking action.
In the related art, the braking pressure in the pre-control air cylinder usually reaches the target value through the cooperation of a single charging electric air valve and a single discharging electric air valve, but the accuracy of braking pressure control is lower due to the single flow paths of the charging electric air valve and the discharging electric air valve, and the charging electric air valve and the discharging electric air valve are required to be opened and closed for many times when the braking pressure control is carried out, so that the service life of the electric air valve is lower.
Therefore, how to improve the brake pressure control accuracy and response efficiency and to extend the service life of the electro-pneumatic valve is a technical problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
The purpose of the present application is to provide a brake pressure control method of a rolling stock, a brake pressure control system of a rolling stock, an air brake device and a storage medium, which can improve brake pressure control accuracy and response efficiency and prolong the service life of an electric air valve.
In order to solve the technical problem, the application provides a brake pressure control method of a rolling stock, which is applied to an air brake device, wherein the air brake device comprises at least two parallel charging electric air valves and at least two parallel discharging electric air valves, the flow paths of any two charging electric air valves are unequal, the flow paths of any two discharging electric air valves are unequal, the air brake device further comprises an air compressor and a pre-control air cylinder, the air compressor is used for inputting air to the pre-control air cylinder and the discharging electric air valves through the charging electric air valves, and the brake pressure control method of the rolling stock comprises the following steps:
receiving a braking instruction, and determining a target braking pressure value according to the braking instruction;
acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value;
and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
Optionally, generating an electric air valve control strategy according to the pressure difference value includes:
determining a target response time according to the braking instruction; wherein the target response time is used to describe the time taken for the brake pressure within the pre-control reservoir to reach the target brake pressure value;
and generating the electric air valve control strategy according to the target response time and the pressure difference value.
Optionally, generating an electric air valve control strategy according to the pressure difference value includes:
determining a corresponding pressure change rate according to the flow paths of each charging electric air valve and each discharging electric air valve;
generating a plurality of alternative control strategies according to the pressure change rate and the pressure difference value; the alternative control strategy comprises a control time sequence of the charging air-conditioning valve and/or a control time sequence of the discharging air-conditioning valve;
and selecting the electric air valve control strategy from all the alternative control strategies.
Optionally, selecting the electric air valve control strategy from all the alternative control strategies includes:
determining the total number of actions of the electric air valve corresponding to each alternative control strategy;
and setting an alternative control strategy with the lowest total action frequency of the electro-pneumatic valve as the electro-pneumatic valve control strategy.
Optionally, selecting the electric air valve control strategy from all the alternative control strategies includes:
determining the total times and response time of actions of the electric air valve corresponding to each alternative control strategy; wherein the response time is used to describe the time required to execute the alternative control strategy;
weighting calculation is carried out on the total times of actions and the response time of the electro-pneumatic valve, so that a strategy score of each alternative control strategy is obtained; wherein the policy score is inversely related to the total number of electro-pneumatic valve actions, and the policy score is inversely related to the response time.
Optionally, the method further comprises:
judging whether the charging electric air valve and/or the discharging electric air valve have faults or not;
if yes, marking the charging electric empty valve and/or the discharging electric empty valve with faults as fault electric empty valves;
correspondingly, generating an electric air valve control strategy according to the pressure difference value comprises the following steps:
generating an electric air valve control strategy according to the pressure difference value and the identification of the fault electric air valve; wherein the electro-pneumatic valve control strategy is a strategy for controlling a charging electro-pneumatic valve and/or a discharging electro-pneumatic valve except for the fault electro-pneumatic valve.
Optionally, the method further comprises:
if a rapid air charging instruction is received, all air charging electric air valves are controlled to be opened, and all air discharging electric air valves are controlled to be closed;
and if a rapid air exhaust instruction is received, controlling all the air charging electric air valves to be closed and controlling all the air exhaust electric air valves to be opened.
The application also provides a braking pressure control system of rolling stock, is applied to air brake device, air brake device includes two at least parallelly connected charge air valve and two at least parallelly connected exhaust air valve, arbitrary two the flow latus rectum of charge air valve is unequal, arbitrary two the flow latus rectum of exhaust air valve is unequal, air brake device still includes air compressor and pre-control pneumatic cylinder, air compressor is used for with the air passes through charge air valve input extremely pre-control pneumatic cylinder with exhaust air valve, rolling stock's braking pressure control system includes:
the target determining module is used for receiving a braking instruction and determining a target braking pressure value according to the braking instruction;
the difference value calculation module is used for obtaining the current braking pressure value of the pre-control air cylinder and calculating the pressure difference value between the current braking pressure value and the target braking pressure value;
and the electric air valve control module is used for generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
The present application also provides a storage medium having stored thereon a computer program which, when executed, implements the steps performed by the brake pressure control method of a rolling stock described above.
The application also provides an air brake device, which comprises at least two parallel charging air-vent valves and at least two parallel discharging air-vent valves, wherein the flow paths of any two charging air-vent valves are unequal, the flow paths of any two discharging air-vent valves are unequal, the air brake device also comprises an air compressor and a pre-control air cylinder, and the air compressor is used for inputting air to the pre-control air cylinder and the discharging air-vent valves through the charging air-vent valves;
the air brake device further comprises a memory and a processor, wherein the memory stores a computer program, and the processor calls the computer program in the memory to realize the operations comprising: receiving a braking instruction, and determining a target braking pressure value according to the braking instruction; acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value; and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
The application provides a rolling stock's braking pressure control method is applied to air brake device, air brake device includes two at least parallelly connected charge air empty valves and two at least parallelly connected exhaust air empty valves, arbitrary two charge air empty valves's flow latus rectum is inequality, arbitrary two exhaust air empty valves's flow latus rectum is inequality, air brake device still includes air compressor and pre-control pneumatic cylinder, air compressor is used for with the air passes through charge air empty valves input to pre-control pneumatic cylinder with exhaust air empty valves, rolling stock's braking pressure control method includes: receiving a braking instruction, and determining a target braking pressure value according to the braking instruction; acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value; and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
The air brake device that this application provided includes at least two parallelly connected electric air valves that airs exhaust and at least two parallelly connected electric air valves that airs exhaust, and the flow latus rectum of each electric air valve that airs exhaust is unequal, and the flow latus rectum of each electric air valve that airs exhaust is also unequal. The air compressor can charge air to the pre-control air cylinder through any number of air charging electric air valves, and the pre-control air cylinder can exhaust air outwards through any number of air discharging electric air valves. After the air brake device receives a brake command, a corresponding target brake pressure value is determined, and an electric air valve control strategy is generated according to a pressure difference value between the current brake pressure value of the pre-control air cylinder and the target brake pressure value. After the electric air valve control strategy is obtained, any number of charging electric air valves and/or exhaust electric air valves can be controlled according to the electric air valve control strategy, so that the braking pressure in the pre-control air cylinder reaches a target braking pressure value. Because at least two parallel charging electric air valves and at least two parallel discharging electric air valves are used in the method, the braking pressure of the pre-control air cylinder can be controlled rapidly and accurately, and the control times of a single charging electric air valve and a single discharging electric air valve are reduced. Therefore, the brake pressure control precision and response efficiency can be improved, and the service life of the electric air valve can be prolonged. The application also provides a brake pressure control system, a storage medium and an air brake device of a rolling stock, which have the beneficial effects and are not repeated here.
Drawings
For a clearer description of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic partial structure of an air brake device according to an embodiment of the present application;
FIG. 2 is a flow chart of a method for controlling brake pressure of a rolling stock according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a related art air brake pressure control for a rolling stock;
FIG. 4 is a schematic diagram of an air duct system of an air brake device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of an electric air valve control principle according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The embodiment of the application provides an air brake device, which can comprise a control device, an air compressor, a charging electric air valve, an exhaust electric air valve, a pre-control air cylinder, a relay valve and a brake cylinder.
Referring to fig. 1, fig. 1 is a schematic partial structure diagram of an air brake device provided in this embodiment of the present application, where the air brake device shown in fig. 1 includes at least two parallel charging air-space valves 101 and at least two parallel discharging air-space valves 102, flow paths of any two charging air-space valves 101 are unequal, flow paths of any two discharging air-space valves 102 are unequal, the air brake device further includes an air compressor 103 and a pre-control air cylinder 104, and the air compressor 103 is configured to input air to the pre-control air cylinder 104 and the discharging air-space valves 102 through the charging air-space valves 101. As can be seen from fig. 1, the charge air valve 102 outputs air through a main pipe, which has a first branch pipe connected to the pre-control air cylinder 104 and a second branch pipe connected to the discharge air valve 102. When the charge air valve 101 is closed and the discharge air valve 102 is opened, air in the pre-control air cylinder 104 can be discharged through the first branch pipe, the second branch pipe, and the discharge air valve 102. In the present embodiment, the number of the charge air space valves 101 and the number of the discharge air space valves 102 may be the same or different, and the present invention is not limited thereto.
The air charging electric air valve is an electromagnetic air valve for charging air, and the air discharging electric air valve is an electromagnetic air valve for discharging air; the electromagnetic air valve is a two-position three-way electromagnetic reversing valve, and the electromagnetic air valve opens or closes a pilot hole at the valve end through the energization or the outage of the electromagnet, so that the valve core is reversed, and the reversing of the controlled fluid medium is realized.
On the basis of the air brake device provided in fig. 1, the embodiment of the present application provides a corresponding method for controlling the brake pressure of a rolling stock, referring to fig. 2, fig. 2 is a flowchart of a method for controlling the brake pressure of a rolling stock provided in the embodiment of the present application, and specific steps may include:
s201: receiving a braking instruction, and determining a target braking pressure value according to the braking instruction;
the embodiment can be applied to a control device of an air brake device, and after a brake instruction is received, the pressure in a pre-control air cylinder is required to reach a target brake pressure value so as to provide power for the braking action of the air brake device. Specifically, after receiving the braking instruction, the braking instruction may be parsed and a target braking pressure value may be obtained according to the parsing result.
S202: acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value;
in this embodiment, a pressure sensor may be provided in the air brake device so as to obtain a current brake pressure value of the pre-control air cylinder, that is, an air pressure value of the pre-control air cylinder at a current moment. On the basis of the obtained current brake pressure value and the target brake pressure value, a pressure difference between the current brake pressure value and the target brake pressure value may be calculated.
S203: and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
After the pressure difference is obtained, a corresponding electric air valve control strategy can be generated according to the quantity and flow paths of the charging electric air valves and the discharging electric air valves, the electric air valve control strategy can comprise the opening and closing sequence of each charging electric air valve and each discharging electric air valve, and after the charging electric air valves and/or the discharging electric air valves are controlled according to the electric air valve control strategy, the braking pressure in the pre-control air cylinder can reach the target braking pressure value.
The air brake device provided by the embodiment comprises at least two parallel charging air-vent valves and at least two parallel discharging air-vent valves, wherein the flow paths of the charging air-vent valves are not equal, and the flow paths of the discharging air-vent valves are also not equal. The air compressor can charge air to the pre-control air cylinder through any number of air charging electric air valves, and the pre-control air cylinder can exhaust air outwards through any number of air discharging electric air valves. After the air brake device receives a brake command, a corresponding target brake pressure value is determined, and an electric air valve control strategy is generated according to a pressure difference value between the current brake pressure value of the pre-control air cylinder and the target brake pressure value. After the electric air valve control strategy is obtained, any number of charging electric air valves and/or exhaust electric air valves can be controlled according to the electric air valve control strategy, so that the braking pressure in the pre-control air cylinder reaches a target braking pressure value. Because at least two parallel charging electric air valves and at least two parallel discharging electric air valves are used in the embodiment, the braking pressure of the pre-control air cylinder can be rapidly and accurately controlled, and the control times of a single charging electric air valve and a single discharging electric air valve are reduced. Therefore, the embodiment can improve the brake pressure control precision and the response efficiency and prolong the service life of the electric air valve.
As a possible implementation manner, on the basis of the corresponding example of fig. 2, an electric air valve control strategy can be generated under a specific time constraint, and the specific process is as follows: determining a target response time according to the braking instruction; wherein the target response time is used to describe the time taken for the brake pressure within the pre-control reservoir to reach the target brake pressure value; and generating the electric air valve control strategy according to the target response time and the pressure difference value.
After the charge air valve and/or the exhaust air valve are controlled according to the air valve control strategy, the braking pressure in the pre-control air cylinder can reach the target braking pressure value within the target response time. Specifically, in this embodiment, the time at which control according to the electric air valve control strategy is started is taken as the start time, the time at which the brake pressure in the pre-control air cylinder reaches the target brake pressure value is taken as the end time, and the events corresponding to the start time and the end time are taken as the actual response time. The step of enabling the braking pressure in the pre-control air cylinder to reach the target braking pressure value within the target response time specifically comprises the following steps: the actual response time is less than the target response time.
As a possible embodiment, since the flow paths of the respective charge air-space valves and the respective exhaust air-space valves are different, the pressure change rates of the pre-control air cylinders are different only when a specific charge air-space valve or exhaust air-space valve is opened. Therefore, the embodiment can determine the corresponding pressure change rate according to the flow path of each charging electro-pneumatic valve and each discharging electro-pneumatic valve; generating a plurality of alternative control strategies according to the pressure change rate and the pressure difference value; and selecting the electric air valve control strategy from all the alternative control strategies. The alternative control strategy comprises a control time sequence of the charging air-conditioning valve and/or a control time sequence of the discharging air-conditioning valve. The control time sequence of the charging electric air valve is a time sequence for opening and closing the charging electric air valve, and the control time sequence of the discharging electric air valve is a time sequence for opening and closing the discharging electric air valve.
Specifically, in the above process, a plurality of alternative control strategies may be generated according to the target response time, the pressure change rate and the pressure difference value, and the electric air valve control strategy may be selected from all the alternative control strategies, so that the braking pressure in the pre-control air cylinder reaches the target braking pressure value within the target response time.
As a possible implementation manner, the alternative control strategy can be screened according to the total number of actions of the electro-pneumatic valve to obtain the actually adopted electro-pneumatic valve control strategy: determining the total number of actions of the electric air valve corresponding to each alternative control strategy; and setting an alternative control strategy with the lowest total action frequency of the electro-pneumatic valve as the electro-pneumatic valve control strategy. The electro-pneumatic valve actions include opening the electro-pneumatic valve and closing the electro-pneumatic valve, the total number of electro-pneumatic valve actions being increased by 1 each time an action to open the electro-pneumatic valve is detected, and the total number of electro-pneumatic valve actions being increased by 1 each time an action to close the electro-pneumatic valve is detected. Through the mode, the total action times of the electric air valve in the braking pressure control process can be reduced, and the service life of the electric air valve is prolonged.
As a possible implementation, the electro-pneumatic valve control strategy may be selected based on the total number of electro-pneumatic valve actions and the response time: determining the total times and response time of actions of the electric air valve corresponding to each alternative control strategy; and carrying out weighted calculation on the total times of actions and the response time of the electro-pneumatic valve to obtain a strategy score of each alternative control strategy. Wherein the response time is used to describe the time required to execute the alternative control strategy; the policy score is inversely related to the total number of electro-pneumatic valve actions, and the policy score is inversely related to the response time. By the mode, the brake pressure control efficiency and the service life of the electric air valve can be improved.
As a possible implementation, the corresponding embodiment of fig. 2 may also have the following operations: judging whether the charging electric air valve and/or the discharging electric air valve have faults or not; if so, marking the charging electric empty valve and/or the discharging electric empty valve with faults as fault electric empty valves. If a faulty electro-pneumatic valve exists, the electro-pneumatic valve control strategy may be generated as follows: generating an electric air valve control strategy according to the pressure difference value and the identification of the fault electric air valve; wherein the electro-pneumatic valve control strategy is a strategy for controlling a charging electro-pneumatic valve and/or a discharging electro-pneumatic valve except for the fault electro-pneumatic valve.
Specifically, if the fault electric air valve is in an open state, determining a new pressure change rate of each charging electric air valve and each discharging electric air valve which are not in fault according to the flow path of the fault electric air valve; and then generating an electric air valve control strategy according to the new pressure change rate and the pressure difference value. The new pressure change rate is as follows: when the fault electric air valve is in an opening state, only a single charging electric air valve or a single discharging electric air valve is started to pre-control the pressure change rate of the air cylinder.
As a possible implementation manner, if a rapid air charging instruction is received, all the air charging electric air valves are controlled to be opened, and all the air discharging electric air valves are controlled to be closed; and if a rapid air exhaust instruction is received, controlling all the air charging electric air valves to be closed and controlling all the air exhaust electric air valves to be opened. Through the mode, the air charging and exhausting of the pre-control air cylinder can be realized.
The flow described in the above embodiment is explained below by way of an embodiment in practical application.
Referring to fig. 3, fig. 3 is a schematic diagram of pressure control of air brake of a rolling stock in the related art, where the pressure control of the air brake of the rolling stock at present adopts closed loop control, and fig. 3 shows input total wind, a charging electric air valve, an exhaust electric air valve, a pressure sensor, a pre-control air cylinder and pre-control pressure output.
The brake control device reads a brake instruction to calculate a target brake pressure value of the pressure control of the pre-control air cylinder, and simultaneously reads a current brake pressure value of the pre-control air cylinder through a pressure sensor, so that the charging or discharging of the charging or discharging electric air valve is controlled in real time, and the pressure control is realized. Because only one electric air valve with the drift diameter is arranged on the pipeline, the flow rate of the electric air valve is relatively fixed, and therefore, the electric air valve is required to have very high response speed when the control, particularly the accurate control, is carried out, the action times of the electric air valve are very high, the service life of the electric air valve is lower, the system cost is increased, and meanwhile, the accuracy of pressure control is lower. Under the condition of any electric air valve fault, the function of the whole system is lost, and the safety is low.
Aiming at the technical problems in the related art, the embodiment provides a locomotive vehicle brake pressure control scheme, which is characterized in that the locomotive vehicle brake pressure control pipeline is provided with the electric air valves with different flow paths in parallel, the brake control device is used for realizing the accurate control of the brake pressure through the combined control of the electric air valves, the pressure response speed and the accuracy are improved, the action times of the electric air valves are reduced, the safety redundancy is realized through the parallel arrangement of the electric air valves, and the system safety is improved. The embodiment has the advantages of simple and convenient implementation process, low cost, strong practicability and wide application range, and can be widely applied to the field of locomotive vehicle control.
Referring to fig. 4, fig. 4 is a schematic diagram of an air pipeline system of an air brake device according to an embodiment of the present application, where total wind, a small-diameter electric air valve S1, a large-diameter electric air valve S2, a small-diameter electric air valve S3, a large-diameter electric air valve S4, a pressure sensor S5, a pre-control air cylinder S6, and pre-control pressure output are shown. The small-diameter electric empty valve S1 and the large-diameter electric empty valve S2 are charging electric empty valves, and the small-diameter electric empty valve S3 and the large-diameter electric empty valve S4 are exhaust electric empty valves. Referring to fig. 5, fig. 5 is a schematic diagram of an electro-pneumatic valve control principle provided in the embodiment of the present application, after receiving a braking command, the control device S7 may send an electro-pneumatic valve control command to the electro-pneumatic valve S1, the electro-pneumatic valve S2, the electro-pneumatic valve S3 and the electro-pneumatic valve S4.
After receiving the braking instruction, the control device S7 calculates a target braking pressure value of the pre-control air cylinder S6, reads a current braking pressure value of the pre-control air cylinder S6 through the pressure sensor S5, and controls the large-diameter electric air valves S2 and S4 and the small-diameter electric air valves S1 and S3 in real time to realize closed-loop control of the pressure of the pre-control air cylinder S6. The control device S7 can simultaneously control the large-diameter electric air valve S2 and the small-diameter electric air valve S1, so that the rapid air charging control of the pre-control air cylinder S6 is realized. The control device S7 can simultaneously control the large-diameter electric air valve S4 and the small-diameter electric air valve S3, and rapid air exhaust control of the pre-control air cylinder S6 is realized.
The control device S7 may select an optimal pressure control curve (i.e. a curve corresponding to an electric air valve control strategy) according to the target brake pressure value, the current brake pressure value and the time requirement (target response time) of the pre-control air cylinder S6, and control the pressure of the pre-control air cylinder S6 accurately by controlling the corresponding electric air valve combination.
In this embodiment, the large-diameter electro-pneumatic valve S2 and the large-diameter electro-pneumatic valve S4 are connected in parallel, and the small-diameter electro-pneumatic valve S1 and the small-diameter electro-pneumatic valve S3 are connected in parallel, so that electro-pneumatic valves with different diameters can be correspondingly increased or reduced according to control precision and response time requirements. Furthermore, when a single electric air valve fails, the pressure of the pre-control air cylinder S6 can be controlled through another parallel electric air valve, so that a safe and redundant design is realized.
The embodiment of the application provides a braking pressure control system of rolling stock, is applied to air brake device, air brake device includes at least two parallelly connected charge air valve and at least two parallelly connected exhaust air valve, arbitrary two the flow latus rectum of charge air valve is unequal, arbitrary two the flow latus rectum of exhaust air valve is unequal, air brake device still includes air compressor and pre-control pneumatic cylinder, air compressor is used for with the air pass through charge air valve input extremely pre-control pneumatic cylinder with exhaust air valve, rolling stock's braking pressure control system includes:
the target determining module is used for receiving a braking instruction and determining a target braking pressure value according to the braking instruction;
the difference value calculation module is used for obtaining the current braking pressure value of the pre-control air cylinder and calculating the pressure difference value between the current braking pressure value and the target braking pressure value;
and the electric air valve control module is used for generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
The air brake device provided by the embodiment comprises at least two parallel charging air-vent valves and at least two parallel discharging air-vent valves, wherein the flow paths of the charging air-vent valves are not equal, and the flow paths of the discharging air-vent valves are also not equal. The air compressor can charge air to the pre-control air cylinder through any number of air charging electric air valves, and the pre-control air cylinder can exhaust air outwards through any number of air discharging electric air valves. After the air brake device receives a brake command, a corresponding target brake pressure value is determined, and an electric air valve control strategy is generated according to a pressure difference value between the current brake pressure value of the pre-control air cylinder and the target brake pressure value. After the electric air valve control strategy is obtained, any number of charging electric air valves and/or exhaust electric air valves can be controlled according to the electric air valve control strategy, so that the braking pressure in the pre-control air cylinder reaches a target braking pressure value. Because at least two parallel charging electric air valves and at least two parallel discharging electric air valves are used in the embodiment, the braking pressure of the pre-control air cylinder can be rapidly and accurately controlled, and the control times of a single charging electric air valve and a single discharging electric air valve are reduced. Therefore, the embodiment can improve the brake pressure control precision and the response efficiency and prolong the service life of the electric air valve.
Further, the process of generating the electro-pneumatic valve control strategy by the electro-pneumatic valve control module according to the pressure difference value comprises the following steps: determining a target response time according to the braking instruction; wherein the target response time is used to describe the time taken for the brake pressure within the pre-control reservoir to reach the target brake pressure value; and generating the electric air valve control strategy according to the target response time and the pressure difference value.
Further, the process of generating the electro-pneumatic valve control strategy by the electro-pneumatic valve control module according to the pressure difference value comprises the following steps: determining a corresponding pressure change rate according to the flow paths of each charging electric air valve and each discharging electric air valve; generating a plurality of alternative control strategies according to the pressure change rate and the pressure difference value; the alternative control strategy comprises a control time sequence of the charging air-conditioning valve and/or a control time sequence of the discharging air-conditioning valve; and selecting the electric air valve control strategy from all the alternative control strategies.
Further, the process of selecting the electro-pneumatic valve control strategy by the electro-pneumatic valve control module from all the alternative control strategies includes: determining the total number of actions of the electric air valve corresponding to each alternative control strategy; and setting an alternative control strategy with the lowest total action frequency of the electro-pneumatic valve as the electro-pneumatic valve control strategy.
Further, the process of selecting the electro-pneumatic valve control strategy by the electro-pneumatic valve control module from all the alternative control strategies includes: determining the total times and response time of actions of the electric air valve corresponding to each alternative control strategy; wherein the response time is used to describe the time required to execute the alternative control strategy; weighting calculation is carried out on the total times of actions and the response time of the electro-pneumatic valve, so that a strategy score of each alternative control strategy is obtained; wherein the policy score is inversely related to the total number of electro-pneumatic valve actions, and the policy score is inversely related to the response time.
Further, the method further comprises the following steps:
the fault detection module is used for judging whether the charging electric air valve and/or the discharging electric air valve have faults or not; if yes, marking the charging electric empty valve and/or the discharging electric empty valve with faults as fault electric empty valves;
correspondingly, the process of generating the electro-pneumatic valve control strategy by the electro-pneumatic valve control module according to the pressure difference value comprises the following steps: generating an electric air valve control strategy according to the pressure difference value and the identification of the fault electric air valve; wherein the electro-pneumatic valve control strategy is a strategy for controlling a charging electro-pneumatic valve and/or a discharging electro-pneumatic valve except for the fault electro-pneumatic valve.
Further, the method further comprises the following steps:
the rapid air charging module is used for controlling all the air charging electric air valves to be opened and controlling all the air discharging electric air valves to be closed if a rapid air charging instruction is received;
and the quick exhaust module is used for controlling all the charging electric air valves to be closed and controlling all the exhaust electric air valves to be opened if a quick exhaust instruction is received.
Since the embodiments of the system portion and the embodiments of the method portion correspond to each other, the embodiments of the system portion refer to the description of the embodiments of the method portion, which is not repeated herein.
The application also provides an air brake device, which comprises at least two parallel charging air-vent valves and at least two parallel discharging air-vent valves, wherein the flow paths of any two charging air-vent valves are unequal, the flow paths of any two discharging air-vent valves are unequal, the air brake device also comprises an air compressor and a pre-control air cylinder, and the air compressor is used for inputting air to the pre-control air cylinder and the discharging air-vent valves through the charging air-vent valves;
the air brake device further comprises a memory and a processor, wherein the memory stores a computer program, and the processor calls the computer program in the memory to realize the operations comprising: receiving a braking instruction, and determining a target braking pressure value according to the braking instruction; acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value; and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
The present application also provides a storage medium having stored thereon a computer program which, when executed, performs the steps provided by the above embodiments. The storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. The utility model provides a braking pressure control method of rolling stock, characterized by is applied to air brake device, air brake device includes at least two parallelly connected charge air empty valve and at least two parallelly connected exhaust air empty valve, arbitrary two charge air empty valve's flow latus rectum is unequal, arbitrary two exhaust air empty valve's flow latus rectum is unequal, air brake device still includes air compressor and pre-control pneumatic cylinder, air compressor is used for with the air is through charge air empty valve input to pre-control pneumatic cylinder and exhaust air empty valve, the braking pressure control method of rolling stock includes:
receiving a braking instruction, and determining a target braking pressure value according to the braking instruction;
acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value;
and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
2. The method of controlling brake pressure of rolling stock according to claim 1, wherein generating an electric air valve control strategy from the pressure difference value comprises:
determining a target response time according to the braking instruction; wherein the target response time is used to describe the time taken for the brake pressure within the pre-control reservoir to reach the target brake pressure value;
and generating the electric air valve control strategy according to the target response time and the pressure difference value.
3. The method of controlling brake pressure of rolling stock according to claim 1, wherein generating an electric air valve control strategy from the pressure difference value comprises:
determining a corresponding pressure change rate according to the flow paths of each charging electric air valve and each discharging electric air valve;
generating a plurality of alternative control strategies according to the pressure change rate and the pressure difference value; the alternative control strategy comprises a control time sequence of the charging air-conditioning valve and/or a control time sequence of the discharging air-conditioning valve;
and selecting the electric air valve control strategy from all the alternative control strategies.
4. A brake pressure control method of a rolling stock according to claim 3, characterized in that selecting the electric air valve control strategy from all the alternative control strategies comprises:
determining the total number of actions of the electric air valve corresponding to each alternative control strategy;
and setting an alternative control strategy with the lowest total action frequency of the electro-pneumatic valve as the electro-pneumatic valve control strategy.
5. A brake pressure control method of a rolling stock according to claim 3, characterized in that selecting the electric air valve control strategy from all the alternative control strategies comprises:
determining the total times and response time of actions of the electric air valve corresponding to each alternative control strategy; wherein the response time is used to describe the time required to execute the alternative control strategy;
weighting calculation is carried out on the total times of actions and the response time of the electro-pneumatic valve, so that a strategy score of each alternative control strategy is obtained; wherein the policy score is inversely related to the total number of electro-pneumatic valve actions, and the policy score is inversely related to the response time.
6. The brake pressure control method of a rolling stock according to claim 1, characterized by further comprising:
judging whether the charging electric air valve and/or the discharging electric air valve have faults or not;
if yes, marking the charging electric empty valve and/or the discharging electric empty valve with faults as fault electric empty valves;
correspondingly, generating an electric air valve control strategy according to the pressure difference value comprises the following steps:
generating an electric air valve control strategy according to the pressure difference value and the identification of the fault electric air valve; wherein the electro-pneumatic valve control strategy is a strategy for controlling a charging electro-pneumatic valve and/or a discharging electro-pneumatic valve except for the fault electro-pneumatic valve.
7. The brake pressure control method of a rolling stock according to claim 1, characterized by further comprising:
if a rapid air charging instruction is received, all air charging electric air valves are controlled to be opened, and all air discharging electric air valves are controlled to be closed;
and if a rapid air exhaust instruction is received, controlling all the air charging electric air valves to be closed and controlling all the air exhaust electric air valves to be opened.
8. The utility model provides a braking pressure control system of rolling stock, its characterized in that is applied to air brake device, air brake device includes at least two parallelly connected charge air empty valves and at least two parallelly connected exhaust air empty valves, arbitrary two charge air empty valves's flow latus rectum is unequal, arbitrary two exhaust air empty valves's flow latus rectum is unequal, air brake device still includes air compressor and pre-control pneumatic cylinder, air compressor is used for with the air through charge air empty valves input to pre-control pneumatic cylinder with exhaust air empty valves, rolling stock's braking pressure control system includes:
the target determining module is used for receiving a braking instruction and determining a target braking pressure value according to the braking instruction;
the difference value calculation module is used for obtaining the current braking pressure value of the pre-control air cylinder and calculating the pressure difference value between the current braking pressure value and the target braking pressure value;
and the electric air valve control module is used for generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
9. The air brake device is characterized by comprising at least two parallel charging air-air valves and at least two parallel discharging air-air valves, wherein the flow paths of any two charging air-air valves are unequal, the flow paths of any two discharging air-air valves are unequal, the air brake device further comprises an air compressor and a pre-control air cylinder, and the air compressor is used for inputting air to the pre-control air cylinder and the discharging air-air valves through the charging air-air valves;
the air brake device further comprises a memory and a processor, wherein the memory stores a computer program, and the processor calls the computer program in the memory to realize the operations comprising: receiving a braking instruction, and determining a target braking pressure value according to the braking instruction; acquiring a current braking pressure value of the pre-control air cylinder, and calculating a pressure difference value between the current braking pressure value and the target braking pressure value; and generating an electric air valve control strategy according to the pressure difference value, and controlling the charging electric air valve and/or the discharging electric air valve according to the electric air valve control strategy so as to enable the braking pressure in the pre-control air cylinder to reach the target braking pressure value.
10. A storage medium having stored therein computer executable instructions which, when loaded and executed by a processor, implement the steps of the brake pressure control method of a rolling stock according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410168554.6A CN117799590A (en) | 2024-02-06 | 2024-02-06 | Brake pressure control method, brake pressure control system, brake device and medium for rolling stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410168554.6A CN117799590A (en) | 2024-02-06 | 2024-02-06 | Brake pressure control method, brake pressure control system, brake device and medium for rolling stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117799590A true CN117799590A (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410168554.6A Pending CN117799590A (en) | 2024-02-06 | 2024-02-06 | Brake pressure control method, brake pressure control system, brake device and medium for rolling stock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117799590A (en) |
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2024
- 2024-02-06 CN CN202410168554.6A patent/CN117799590A/en active Pending
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