CN115476825A - Braking system for railway vehicle and control method thereof - Google Patents
Braking system for railway vehicle and control method thereof Download PDFInfo
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- CN115476825A CN115476825A CN202211204880.5A CN202211204880A CN115476825A CN 115476825 A CN115476825 A CN 115476825A CN 202211204880 A CN202211204880 A CN 202211204880A CN 115476825 A CN115476825 A CN 115476825A
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- braking
- unit
- control unit
- vehicle
- speed
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Classifications
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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
- 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
- B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
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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
- B60T8/172—Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters
-
- 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
- B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
- B60T8/1893—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution especially adapted for railway vehicles
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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
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
- B60T8/3235—Systems specially adapted for rail vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
- B61L15/0018—Communication with or on the vehicle or vehicle train
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
- B61L15/0054—Train integrity supervision, e.g. end-of-train [EOT] devices
Abstract
The invention discloses a braking system for a railway vehicle, and aims to overcome the defects of inaccurate control and poor follow-up performance caused by open-loop control adopted by the conventional railway vehicle. The vehicle braking system comprises a control unit, an execution unit and a sensing unit, wherein the control unit collects braking information, controls the execution unit to perform braking implementation or braking relief through a network, receives and processes a speed signal from the sensing unit, and controls the corresponding execution unit to reduce, maintain or recover braking force so that the vehicle speed tends to a preset braking speed. According to the vehicle control system, the control unit, the execution unit and the sensing unit are controlled in a large closed loop mode, so that accurate control is achieved, and the follow-up property of the vehicle is improved.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a braking system for a rail vehicle and a control method thereof.
Background
With the development of technologies for rail vehicles, rail vehicles are becoming the first vehicles for more and more passengers to travel. The force generated by the braking system in opposition to the direction of train travel is referred to as the braking force, which dampens the movement of the train, including slowing, stopping its movement, or accelerating it, and may be referred to as braking. Conversely, the weakening or release of the brake application process is referred to as a release.
The existing rail train adopts open-loop control, so that the speed accuracy of the rail vehicle is low, and the follow-up performance is poor.
Chinese patent publication No. CN106536301A, entitled brake system for a car of a rail vehicle, adjusting device and method for operating an adjusting device, discloses a brake system (100) for a car of a rail vehicle comprising an adjusting device (10) with at least one disc brake for each axle (4), wherein the adjusting device (10) has a control device (11). The adjusting device (10) is designed with at least one cabin control unit (14) and at least one coupling unit (16) for selectively controlling the at least one disc brake for each axle (4). The invention further relates to an adjusting device (10) and a method for operating an adjusting device (10) and a method for deicing a brake unit (5) of a brake system (100) for a carriage of a rail vehicle and/or for preventing icing of a brake unit. This application adopts open-loop control, and under complicated temperature, speed and topography change, the dynamics and the holding time of brake force can't match with vehicle speed, lead to effectively carrying out the braking and implement or the braking is alleviated to lead to vehicle speed to be in great within range.
Disclosure of Invention
The invention overcomes the defect that the conventional rail vehicle brake adopts open-loop control, and provides the brake system for the rail vehicle, which realizes accurate control and improves the follow-up property of the vehicle through closed-loop control.
In order to solve the technical problem, the invention adopts the following technical scheme:
a braking system for a railway vehicle comprises a control unit, an execution unit and a sensing unit, wherein the control unit collects braking information, controls the execution unit to perform braking implementation or braking relief through a network, receives and processes a speed signal from the sensing unit, and controls the corresponding execution unit to reduce, maintain or recover braking force so that the vehicle speed tends to a preset braking speed.
The control unit, the execution unit and the sensing unit are all arranged in a bogie corresponding to the railway vehicle. The signals are transmitted among the units through a network. The network includes a wireless network and a hard signal line. The control unit receives the speed signal from the sensing unit and controls the braking force of the actuating unit and the time for maintaining the braking force. On the basis, the control unit continuously receives the speed signal of the sensing unit to adjust the control signal transmitted to the execution unit, and adjusts the braking force of the execution unit and/or the time for maintaining the braking force. The structure realizes accurate control through closed-loop control, and improves the follow-up property of the vehicle.
Preferably, the sensing means includes a rotation speed sensor corresponding to each axle. The rotational speed of the axle or wheel is determined by means of a rotational speed sensor, and the corresponding vehicle speed can be deduced from the diameter of the wheel.
Preferably, the sensing unit further comprises an acceleration sensor or a speed measuring radar. The configuration of the acceleration sensor/the speed measuring radar can improve the accuracy and precision of the control unit for identifying the speed signals of the trains (vehicles), and avoids misjudgment of the speed signals of the trains (vehicles) caused by the speed deviation of the whole speed sensor under poor adhesion conditions of the long rail surface wheel rails or other special conditions.
Preferably, the device also comprises a power supply unit which is electrically connected with the control unit and the execution unit. The power supply unit consists of a vehicle power supply, a standby power supply and a power supply management unit, and the vehicle power supply is used as a power supply source for the control unit and the electromechanical braking unit during normal work; if the vehicle power supply fails, switching to a standby power supply; the power management unit is responsible for monitoring the working states and the power quality of the vehicle power supply and the standby power supply, performing power conversion or power filtering, and then outputting the power to the control unit and the electromechanical braking unit. The power supply of the electromechanical braking unit is directly provided by the power management unit: firstly, the node of a control unit is reduced from the transmission link, and the possibility of power line faults and interference is reduced; secondly, the requirement of the control unit on the power supply power is reduced, the heat productivity of the control unit is reduced, and the working environment of the control unit is improved; and finally, only network cables are arranged between the control unit and the electromechanical braking unit, so that complicated cables such as power cables, control cables, feedback cables and the like are simplified.
Preferably, the actuator unit comprises a number of electromechanical braking devices.
Preferably, the control unit, the execution unit and the sensing unit are connected only by a communication network. The communication network comprises hard network lines and a wireless mode. And the laying of power lines and signal lines is omitted by the corresponding connection mode of the power supply.
A method of braking a railway vehicle, comprising a braking system for a railway vehicle as described above, comprising a plurality of control units, each train being provided with at least one control unit, comprising the steps of:
(1) Setting one control unit as a main control unit and the rest control units as slave units according to a preset sequence;
(2) The master control unit collects environmental information through a network, carries out braking calculation and transmits braking information to the slave unit through the network;
(3) And the brake system corresponding to each control unit executes braking according to the acquired braking information.
The application provides an automatic braking system for a rail vehicle, which is used for coordinating locomotive or vehicles with braking or traction, which can generate interaction on a rail train, and comprises bogies of each vehicle and a traction system for providing vehicle power. When active speed change is required, selecting one master control unit according to a preset arrangement, and then obtaining corresponding braking information through braking calculation; corresponding braking information is distributed to the other slave units. And the slave unit controls the corresponding execution unit to reduce, maintain or recover in a closed-loop mode according to the braking information. By means of cooperation with the tractors of the individual vehicles, a fully automated operation for the rail vehicle is achieved.
Preferably, the environment information includes brake information provided by a brake system of a bogie of the main control unit corresponding to the car, a traction system, and a brake system of a bogie of the other vehicle, and the brake information includes load information and speed information. The brake system of each vehicle bogie, the traction system and the brake system of the bogie of other vehicles provide the motion information of the vehicle captured by the sensing unit collected by each control unit of the main control unit.
Preferably, the preset sequencing order is as follows:
(1) Numbering the control units;
(2) And selecting the control systems one by one according to the serial number sequence as a main control unit. The configuration of each control unit is the same and has the same computing power. And after the power of the train is switched on and off every time, selecting the corresponding control unit as a main control unit according to the number.
Preferably, the preset sequencing order is as follows:
the control unit started first after the train is started is the main control unit.
When the train is recovered from unexpected power loss, the preset sequencing mechanism can recover the main control unit in the braking system at the fastest speed, and when the main control unit performs braking calculation, consumed time is used for buffering the starting of other follow-up driven units, so that the braking capability of the train is recovered at the fastest speed, and the tolerance of the train is improved.
Compared with the prior art, the invention has the beneficial effects that: (1) According to the vehicle control system, the control unit, the execution unit and the sensing unit are controlled in a large closed loop, so that accurate control is realized, and the follow-up property of the vehicle is improved; (2) The braking force is controlled by dividing a plurality of control units of the train into a main control unit and a slave unit, so that the full-automatic operation of the railway vehicle is realized.
Drawings
FIG. 1 is a schematic illustration of the braking system of the present invention;
in the figure:
the system comprises a control unit 1, an execution unit 2, a rotating speed sensor 3, an acceleration sensor or a speed measuring radar 4, a vehicle power supply 5, a standby power supply 6, a power supply management unit 7, a network 8 and a cable 9.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
Example 1:
as shown in fig. 1, a brake system for a rail vehicle includes a control unit 1, an execution unit 2, and a sensing unit.
In some embodiments, the sensing unit includes a rotation speed sensor 3 corresponding to each axle. The rotational speed of the axle or wheel is determined by means of the rotational speed sensor 3, and the corresponding vehicle speed can be deduced from the diameter of the wheel. In other embodiments, the sensing unit further comprises an acceleration sensor or a speed radar 4. The configuration of acceleration sensor/speed measuring radar can promote the accuracy and the precision of control unit 1 to train (vehicle) speed signal discernment, avoids because of the whole rotational speed sensor 3 speed deviation under the condition difference or other special circumstances is adhered to longer rail face wheel rail, arouses the erroneous judgement to train (vehicle) speed signal.
In some embodiments, the execution unit 2 comprises several electromechanical braking devices. The electromechanical brake system not only has high brake force control precision, but also has the response speed capable of following the target command with frequency changing sinusoidally at 1 Hz. The electromechanical brake device is internally provided with a speed measuring sensor, and the speed measuring sensor and the mechanical part of the electromechanical brake device form a small closed loop, so that the accuracy of the brake speed is better facilitated.
The device also comprises a power supply unit which is electrically connected with the control unit 1 and the execution unit 2. The power supply unit consists of a vehicle power supply 5, a standby power supply 6 and a power supply management unit 7, wherein the vehicle power supply 5 is used as a power supply source for the control unit 1 and the electromechanical braking unit during normal work; if the vehicle power supply 5 fails, switching to the standby power supply 6; the power management unit 7 is responsible for monitoring the working states and the power quality of the vehicle power supply 5 and the standby power supply 6, performing power conversion or power filtering, and outputting the power to the control unit 1 and the electromechanical braking unit. The power supply of the electromechanical braking unit is provided directly by the power management unit 7: firstly, the node of the control unit 1 is reduced from the transmission link, and the possibility of power line faults and interference is reduced; secondly, the requirement of the control unit 1 on the power supply power is reduced, the heat productivity of the control unit 1 is reduced, and the working environment of the control unit 1 is improved; finally, only a network cable of a network 8 is arranged between the control unit 1 and the electromechanical braking unit, so that complicated cables 9 such as power lines, control lines, feedback lines and the like are simplified.
The control unit 1, the execution unit 2 and the sensing unit are connected only by a communication network. Each network line is connected to the control unit 1, each cable 9 is connected to the power supply unit, and the energy line is separated from the signal line, so that the stability of signal transmission is ensured, the protection requirement on the signal line is reduced, and the wiring is easier.
As an example, the execution unit 2 includes 4 electromechanical braking devices, respectively electromechanical braking units 2A, 2B, 2C, 2D, and correspondingly, the sensing unit includes rotational speed sensors 3, respectively 3A, 3B, 3C, 3D, respectively corresponding to the electromechanical braking units.
On the basis, the control unit 1 collects brake information, controls the execution units 2 to perform brake implementation or brake release through the network 8, receives and processes speed signals from the sensing units, and controls the corresponding execution units 2 to reduce, maintain or recover so that the vehicle speed tends to a preset brake speed.
The control unit 1, the execution unit 2 and the sensing unit are all arranged in a bogie corresponding to the railway vehicle. The signals are transmitted between the various units via a network 8. The network 8 includes a wireless network and a hard signal line. The control unit 1 receives the speed signal from the sensing unit and controls the braking force of the actuating unit 2 and the time for maintaining the braking force. On the basis, the control unit 1 continuously receives the speed signal of the sensing unit to adjust the control signal transmitted to the execution unit 2, and adjusts the braking force of the execution unit 2 and/or the time for maintaining the braking force. The structure realizes accurate control through closed-loop control, and improves the follow-up property of the vehicle.
Example 2:
a braking method for a rail vehicle has a plurality of vehicles and a braking system for providing braking force to the vehicles. Each vehicle has two bogies, each bogie or brake system having a method of braking comprising a rail vehicle as described in embodiment 1.
The brake system of a vehicle thus comprises several control units 1, each vehicle being provided with 2 control units 1.
One control unit 1 is set as a master control unit according to a preset sequence, and the rest control units 1 are slave units. The master control unit collects the environmental information through the network 8 and carries out braking calculation, the braking information is transmitted to the slave units through the network 8, and the braking system corresponding to each control unit 1 executes braking according to the obtained braking information.
The application provides an automatic braking system for a rail vehicle, which is used for coordinating locomotive or vehicles with braking or traction, which can generate interaction on a rail train, and comprises bogies of each vehicle and a braking system for providing braking force of the vehicle. When active speed change is needed, selecting one main control unit according to preset arrangement, and then obtaining corresponding braking information through braking calculation; corresponding braking information is distributed to the other slave units. The slave unit controls the corresponding execution unit 2 to reduce, maintain or restore in a closed-loop manner according to the brake information. The rail vehicle can be operated in a fully automated manner by means of cooperation with the respective tractors for the rail vehicle.
The environment information comprises brake information provided by a brake system of a bogie of the vehicle, a traction system and a brake system of a bogie of other vehicles corresponding to the main control unit, and the brake information comprises load information and speed information. The brake system of each vehicle bogie, the traction system and the brake system of the bogie of other vehicles provide the motion information of the vehicle captured by the sensing unit collected by each control unit 1 of the main control unit.
In some embodiments, the predetermined sort order is:
(1) Numbering the individual control units 1;
(2) And selecting the control systems one by one according to the serial number sequence as a main control unit. The configuration of each control unit 1 is the same and has the same computing power. And after the power of the train is switched on and off every time, selecting the corresponding control unit 1 as a main control unit according to the number.
In other embodiments, the predetermined ordering is:
the control unit 1 which is started first after the train is started is the main control unit.
When the train is recovered after the power failure, the preset sequencing mechanism can recover the main control unit in the braking system at the fastest speed, and when the main control unit performs braking calculation, the consumed time buffers the subsequent starting of other slave units, so that the braking capability of the train is recovered at the fastest speed, and the tolerance of the train is improved.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A braking system for a railway vehicle is characterized by comprising a control unit, an execution unit and a sensing unit, wherein the control unit collects braking information, controls the execution unit to perform braking implementation or braking release through a network, receives and processes a speed signal from the sensing unit, and controls the corresponding execution unit to reduce, maintain or recover braking force so that the vehicle speed tends to a preset braking speed.
2. A brake system for a railway vehicle according to claim 1, wherein the sensing unit comprises a rotational speed sensor corresponding to each axle.
3. A braking system for a rail vehicle as claimed in claim 2 wherein the sensing unit further comprises an acceleration sensor or a speed radar.
4. The braking system for a railway vehicle as claimed in claim 1, further comprising a power supply unit electrically connected to the control unit and the execution unit.
5. A brake system for a rail vehicle according to any one of claims 1 to 4 wherein the actuator unit includes a plurality of electromechanical braking devices.
6. A brake system for a rail vehicle according to claim 1, wherein the control unit, the actuating unit and the sensor unit are connected only via a communication network.
7. A railway vehicle brake system comprising a railway vehicle brake system according to claim 1, comprising a plurality of control units, each train being provided with at least one control unit, the steps comprising:
(1) Setting one control unit as a main control unit and the rest control units as slave units according to a preset sequence;
(2) The master control unit collects environmental information through a network, performs braking calculation and transmits braking information to the slave unit through the network;
(3) And each control unit executes braking according to the acquired braking information.
8. The method as claimed in claim 7, wherein the environment information includes braking information provided by a braking system of a bogie corresponding to the master control unit, a traction system, and a braking system of a bogie of another vehicle, and the braking information includes load information and speed information.
9. The method of claim 7, wherein the predetermined sequence is: (1) numbering each control unit; (2) And selecting the corresponding control systems as the main control units one by one according to the numbering sequence.
10. The method of claim 7, wherein the predetermined sequence is: and selecting the control unit which is started firstly after the train is powered on as a main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204880.5A CN115476825A (en) | 2022-09-29 | 2022-09-29 | Braking system for railway vehicle and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211204880.5A CN115476825A (en) | 2022-09-29 | 2022-09-29 | Braking system for railway vehicle and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115476825A true CN115476825A (en) | 2022-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211204880.5A Pending CN115476825A (en) | 2022-09-29 | 2022-09-29 | Braking system for railway vehicle and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115476825A (en) |
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2022
- 2022-09-29 CN CN202211204880.5A patent/CN115476825A/en active Pending
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