阅读说明：本技术 一种用于城轨车辆电机械制动系统的停放制动控制方法 (Parking brake control method for electromechanical brake system of urban rail vehicle ) 是由 时瑞 梁艺凡 时蒙 陈小伟 黄沈阅 王楠 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种用于城轨车辆电机械制动系统的停放制动控制方法,包括操作指令机构、制动控制机构、电机械执行机构、辅助机构；所述操作指令机构输出控制信号至制动控制机构,驱动电机械执行机构动作,实现车辆的制动施加和缓解,辅助机构用于制动系统的冗余供电系统,辅助机构还包括有监测车辆零速状态的零速状态监测机构和提供备用电源的储能电池机构。本发明可令使用电机械制动系统的城轨车辆实现停放状态下的制动施加和缓解,以及实现城轨车辆休眠状态下制动的施加和缓解,控制方法简单高效,故障率低。(The invention discloses a parking brake control method for an electromechanical brake system of an urban rail vehicle, which comprises an operation instruction mechanism, a brake control mechanism, an electromechanical actuating mechanism and an auxiliary mechanism, wherein the operation instruction mechanism is used for executing parking brake; the operation instruction mechanism outputs a control signal to the brake control mechanism to drive the electromechanical actuating mechanism to act, so that the brake application and the brake release of the vehicle are realized, the auxiliary mechanism is used for a redundant power supply system of the brake system, and the auxiliary mechanism further comprises a zero-speed state monitoring mechanism for monitoring the zero-speed state of the vehicle and an energy storage battery mechanism for providing a standby power supply. The invention can make the urban rail vehicle using the electromechanical braking system realize the brake application and release in the parking state and the brake application and release in the dormant state of the urban rail vehicle, and has simple and efficient control method and low failure rate.)

1. A parking brake control method for an electromechanical brake system of an urban rail vehicle is characterized by comprising the following steps: comprises an operation instruction mechanism (10), a brake control mechanism (20), an electromechanical actuating mechanism (30) and an auxiliary mechanism (40); the operation instruction mechanism (10) outputs a control signal to the brake control mechanism (20) to drive the electromechanical actuating mechanism (30) to act so as to realize the brake application and release of the vehicle, and the auxiliary mechanism (40) is used for a redundant power supply system of the brake system;

the control method specifically comprises the following steps:

s1, brake control mechanism (20) signal judgment: the vehicle gives an operation command through the operation command mechanism (10), and outputs a power-on and power-off signal for parking the applied train line, a power-on and power-off signal for parking the released train line and a power-on and power-off signal for the zero-speed train line, and the three control signals are input to the brake control mechanism (20); the brake control mechanism (20) outputs a control power supply and a control signal to the electromechanical actuating mechanism (30) through logic judgment;

s2, application of brake for parking the train: in the stop state of the train, the zero-speed train line is electrified; the parking brake applying button on the driver platform is operated, the operation instruction mechanism (10) outputs a power-on signal for parking the applied train line and a power-off signal for parking the released train line, the brake control mechanism (20) provides a control power supply and outputs a parking brake applying instruction to the electromechanical actuating mechanism (30) after receiving the three logic signals, and the electromechanical actuating mechanism (30) controls the bogie brake motor to rotate forwards and applies and controls parking brake; after the brake application is finished, the electromechanical actuating mechanism (30) inputs a feedback signal into the brake control mechanism (20);

s3, braking and relieving of the parked train: when a train stops, a zero-speed train line is powered on, a parking brake release button on a driver platform is operated, an operation instruction mechanism (10) outputs a power-off signal for parking the applied train line and a power-on signal for parking the released train line, a brake control mechanism (20) provides a control power supply and outputs a parking brake release instruction to an electromechanical execution mechanism (30) after receiving three logic signals, and the electromechanical execution mechanism (30) controls the bogie brake motor to reversely rotate so as to release control of parking brake; after the brake application is finished, the electromechanical actuating mechanism (30) inputs a feedback signal into the brake control mechanism (20);

s4, brake application when the parked train is dormant: when the parking brake applying button is not operated, the parking brake is not applied; after the vehicle is dormant and before the DC110V power supply of the brake control mechanism (20) is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism (20) and the auxiliary mechanism (40) through the operation command mechanism (10), and at the moment, the brake control mechanism (20) automatically applies parking brake to finish the dormant brake of the parked train.

2. The parking brake control method for the electromechanical brake system of the urban rail vehicle according to claim 1, characterized in that: the auxiliary mechanism (40) comprises a zero-speed state monitoring mechanism (41) for monitoring the zero-speed state of the vehicle; the auxiliary mechanism (40) also includes an energy storage battery mechanism (42) for providing a backup power source.

3. The parking brake control method for the electromechanical brake system of the urban rail vehicle according to claim 1, characterized in that: the dormant state signal comprises an electric power losing signal for outputting a parking applying train line, an electric power losing signal for parking a releasing train line and an electric power getting signal for a zero-speed train line.

4. A parking brake control method for an electromechanical brake system of an urban rail vehicle according to claim 2 and claim 3, characterized in that: after the vehicle is dormant and before the DC110V power supply of the brake control mechanism (20) is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism (20) and the auxiliary mechanism (40) through the operation instruction mechanism (10), the zero-speed state monitoring mechanism (41) of the auxiliary mechanism monitors the zero-speed state of the vehicle, the energy storage battery mechanism (42) of the auxiliary mechanism outputs a standby power supply, and the brake control mechanism (20) applies parking brake to finish the dormant brake of the parked train.

5. The parking brake control method for the electromechanical brake system of the urban rail vehicle according to claim 2, characterized in that: the auxiliary mechanism (40) detects an auxiliary power failure, and in order to prevent the vehicle from being unable to apply parking brake, the vehicle is in a zero-speed state, provides a control power supply and outputs a parking brake release instruction to the electromechanical actuating mechanism (30), applies parking brake, and simultaneously displays the auxiliary mechanism (40) failure on the network control screen.

Technical Field

The invention relates to the field of urban rail vehicle braking, in particular to a parking braking control method for an electromechanical braking system of an urban rail vehicle.

Background

At present, the most mature control scheme of urban rail vehicles is an air braking mode, and mainly comprises an air supply system, a basic braking system and a braking control system. The air supply system provides compressed air for the brake system and mainly comprises an air compressor, a dryer, an air cylinder, a total air pipe penetrating through the whole vehicle, a cock and the like; the basic brake system receives pressure air to implement corresponding brake force and mainly comprises a brake cylinder, a brake shoe or a brake disc and the like; the core device of the brake control system is a brake control device which integrates an electronic brake control unit, an electro-pneumatic conversion valve, a relay valve, an emergency brake valve and the like.

The train parking brake control based on the air brake scheme is to control the application and the release of parking brake force and the automatic application of the parking brake force after the vehicle is in a dormant state and total wind is leaked by controlling the relationship between the wind pressure between a brake air cylinder and a parking brake cylinder and the force between springs.

The air braking scheme adopts compressed air as an execution medium of a braking system, and the braking system is relatively complex in composition structure and more in components, so that the integration of the braking system is not facilitated; meanwhile, the air supply system has more components and a plurality of fault points, so that the fault rate is high; in addition, the air brake system has a long brake response time and relatively low brake force control accuracy.

Therefore, the electromechanical braking system is used for replacing a traditional air braking system and is better in setting, the electromechanical braking system is used for replacing the air braking system and is innovatively applied to urban rail vehicles, the difference of the traditional air circuit control parking braking and circuit control parking braking triggering principle occurs, namely, the air braking system controls the application or release of the parking braking by controlling the pressure of the air cylinder, and meanwhile, along with the leakage of main wind, the parking braking is gradually and automatically applied by the reduction of the pressure of the main wind. Electromechanical braking systems cannot adopt the above control schemes. Meanwhile, the electromechanical brake is completely triggered and relieved by circuit control, the electromechanical brake is applied by controlling the electric tread through the power supply circuit, however, after the power supply is lost, the brake motor cannot execute the instruction of the control circuit, and meanwhile, after the vehicle is in a dormant state, the power supply of the brake system is disconnected, and the parking brake cannot automatically apply the parking brake along with the time lapse like the traditional air brake system, so that the risk of vehicle sliding possibly exists after the vehicle is in the dormant state. The electromechanical braking system is designed for loading for the first time, and a plurality of vehicle-side control schemes are still blank, so that no corresponding parking control scheme exists.

In view of the above disadvantages, a parking brake control method for an electromechanical brake system of an urban rail vehicle is urgently needed. Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a parking brake control method for an electromechanical brake system of an urban rail vehicle.

In order to solve the technical problems, the invention adopts the technical scheme that:

a parking brake control method for an electromechanical brake system of an urban rail vehicle comprises an operation instruction mechanism, a brake control mechanism, an electromechanical actuating mechanism and an auxiliary mechanism; the operation instruction mechanism outputs a control signal to the electromechanical actuating mechanism to drive the brake control mechanism to act so as to realize the brake application and release of the vehicle, and the auxiliary mechanism is used for a redundant power supply system of the brake system;

the control method specifically comprises the following steps:

s1, brake control mechanism signal judgment: the vehicle gives an operation command through the operation command mechanism, and outputs a power-on and power-off signal for parking the applied train line, a power-on and power-off signal for parking the released train line and a power-on and power-off signal for the zero-speed train line, and the three control signals are input to the brake control mechanism; the brake control mechanism outputs a control power supply and a control signal to the electromechanical actuating mechanism through logic judgment;

s2, applying the parking brake of the static train: in the stop state of the train, the zero-speed train line is electrified; the parking brake applying button on the driver platform is operated, the operation instruction mechanism outputs a power-on signal for parking the applying train line and a power-off signal for parking the relieving train line, the brake control mechanism provides a control power supply and outputs a parking brake applying instruction to the electromechanical actuating mechanism after receiving the three logic signals, and the electromechanical actuating mechanism controls the bogie brake motor to rotate forwards and applies the control parking brake; after the brake application is finished, the electromechanical actuating mechanism transmits a feedback signal to the brake control mechanism;

s3, relieving parking brake of the static train: when a train stops, a zero-speed train line is powered on, a parking brake release button on a driver platform is operated, an operation instruction mechanism outputs a power-off signal for parking an applied train line and a power-on signal for parking the released train line, a brake control mechanism provides a control power supply and outputs a parking brake release instruction to an electromechanical execution mechanism after receiving three logic signals, and the electromechanical execution mechanism controls a bogie brake motor to reversely rotate so as to release and control parking brake; after the brake application is finished, the electromechanical actuating mechanism inputs a feedback signal into the brake control mechanism;

s4, applying parking brake when the static train is dormant: when the parking brake applying button is not operated, the parking brake is not applied; after the vehicle is dormant and before the DC110V power supply of the brake control mechanism is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism and the auxiliary mechanism through the operation command mechanism, and at the moment, the brake control mechanism automatically applies parking brake to finish the dormant brake of the parked train.

As a further preferable aspect of the present invention, the assist mechanism includes a stall state monitoring mechanism that monitors a stall state of the vehicle; the auxiliary mechanism also comprises an energy storage battery mechanism for providing a standby power supply.

As a further preferred aspect of the present invention, the sleep state signal includes an electric power off signal for parking the applied train line, an electric power off signal for parking the easement train line, and an electric power on signal for the zero-speed train line.

As a further preferred aspect of the present invention, after the vehicle is dormant and before the DC110V power supply of the brake control mechanism is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism and the auxiliary mechanism through the operation command mechanism, the zero speed state monitoring mechanism of the auxiliary mechanism monitors the zero speed state of the vehicle, the energy storage battery mechanism of the auxiliary mechanism outputs a standby power supply, and the brake control mechanism applies parking brake to complete the dormant brake of the parked train.

As a further preferred aspect of the present invention, the auxiliary mechanism detects an auxiliary power failure, and in order to prevent the vehicle from being unable to apply parking brake, the vehicle is in a zero speed state, and provides a control power and outputs a parking brake release instruction to the electromechanical actuator, and applies parking brake, and at the same time, displays the auxiliary mechanism failure on the network control screen.

The invention has the following beneficial effects:

1. the control method overcomes the defects of a control scheme for applying and relieving parking brake of an electromechanical brake system, realizes automatic application and relief of the braking force of the urban rail vehicle in a parking state through the operation instruction mechanism, the electromechanical actuating mechanism and the brake control mechanism, and is simple and efficient in control method and low in failure rate.

2. The braking force of the urban rail vehicle in the dormant state can be automatically applied and relieved, and the situation that the urban rail vehicle slides when being stopped in a garage or on a ramp is avoided.

3. The method can detect the zero-speed state of the urban rail vehicle under the condition of auxiliary power supply failure, automatically apply parking brake, ensure the safety of the vehicle and simultaneously upload failure feedback to the TCMS.

In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.

The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

As shown in fig. 1 and fig. 2, a parking brake control method for an electromechanical brake system of an urban rail vehicle comprises an operation command mechanism 10, a brake control mechanism 20, an electromechanical actuator 30 and an auxiliary mechanism 40; the operation instruction mechanism 10 outputs a control signal to the electromechanical actuating mechanism 30 to drive the brake control mechanism 20 to act, so that the brake application and release of the vehicle are realized, and the auxiliary mechanism is used for a redundant power supply system of the brake system.

The assist mechanism 40 further includes a stall condition monitoring mechanism 41 for monitoring the stall condition of the vehicle and a stored battery mechanism 42 for providing a backup power source.

The control method specifically comprises the following steps:

s1, brake control means 20 signal determination: the vehicle gives an operation command through the operation command mechanism 10, and outputs a power-on and power-off signal for parking the applied train line, a power-on and power-off signal for parking the released train line and a power-on and power-off signal for the zero-speed train line, and the three control signals are input to the brake control mechanism 20; the brake control mechanism 20 outputs a control power supply and a control signal to the electromechanical actuating mechanism 30 through logic judgment;

the logic determination table of the brake control mechanism 20 is as follows:

serial number	Parking enforcement train line	Parking relieving train line	Zero speed train	Brake applied state	Remarks for note
						1	Get electricity	Power loss	1	Application of
2	Get electricity	Power loss	0	Mitigation
						3	Get electricity	Get electricity	1	Application of/mitigation	Maintaining the previous state while uploading train line faults to the TCMS
4	Get electricity	Get electricity	0	Mitigation
						5	Power loss	Get electricity	1	Mitigation
6	Power loss	Get electricity	0	Mitigation
						7	Power loss	Power loss	1	Application of	Detecting zero speed signal application
8	Power loss	Power loss	0	Mitigation

S2, applying the parking brake of the static train: in the stop state of the train, the zero-speed train line is electrified; the parking brake applying button on the driver platform is operated, the operation instruction mechanism 10 outputs a power-on signal for parking the applying train line and a power-off signal for parking the relieving train line, the brake control mechanism 20 provides a control power supply and outputs a parking brake applying instruction to the electromechanical actuating mechanism 30 after receiving the three logic signals, and the electromechanical actuating mechanism 30 controls the bogie brake motor to rotate forwards and applies the control parking brake; after the brake application is completed, the electromechanical actuator 30 inputs a feedback signal to the brake control mechanism 20;

s3, applying the parking brake of the static train: when a train stops, a zero-speed train line is powered on, a parking brake release button on a driver platform is operated, an operation instruction mechanism 10 outputs a power-off signal for parking an applied train line and a power-on signal for parking a released train line, a brake control mechanism 20 provides a control power supply and outputs a parking brake release instruction to an electromechanical execution mechanism 30 after receiving three logic signals, and the electromechanical execution mechanism 30 controls a bogie brake motor to reversely rotate so as to release control of parking brake; after the brake application is completed, the electromechanical actuator 30 inputs a feedback signal to the brake control mechanism 20;

s4, applying parking brake when the static train is dormant: when the parking brake applying button is not operated, the parking brake is not applied; after the vehicle is dormant and before the DC110V power supply of the brake control mechanism 20 is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism 20 and the auxiliary mechanism 40 by operating the command mechanism 10, and at the moment, the brake control mechanism automatically applies parking brake to complete the dormant brake of the parked train.

The sleep state signal comprises a power-off signal for outputting a parking applied train line, a power-off signal for parking a release train line and a power-on signal for a zero-speed train line; after the vehicle is dormant and before the DC110V power supply of the brake control mechanism 20 is powered off, the parked vehicle inputs a dormant state signal to the brake control mechanism 20 and the auxiliary mechanism 40 through the operation instruction mechanism 10, the zero-speed state monitoring mechanism 41 of the auxiliary mechanism monitors the zero-speed state of the vehicle, the energy storage battery mechanism 42 of the auxiliary mechanism outputs a standby power supply, and the brake control mechanism 20 applies parking brake to complete the dormant brake of the parked train.

The auxiliary mechanism 40 detects an auxiliary power failure, and in order to prevent the vehicle from being unable to apply parking brake, the vehicle is in a zero speed state, provides a control power and outputs a parking brake release command to the electromechanical actuator 30, applies parking brake, and simultaneously displays the auxiliary mechanism 40 failure on the network control screen.

The invention makes up the defects of the control scheme of applying and relieving parking brake of the electromechanical brake system, and realizes the automatic application and relieving of the braking force of the urban rail vehicle in the parking state through the operation instruction mechanism, the electromechanical actuating mechanism and the brake control mechanism; meanwhile, the braking force of the urban rail vehicle in a dormant state can be automatically applied and relieved, and the situation that the urban rail vehicle slides when being stopped in a garage or on a ramp is avoided; under the condition of auxiliary power supply failure, the zero-speed state of the urban rail vehicle is detected, parking brake is automatically applied, the safety of the vehicle is ensured, and meanwhile, failure feedback is uploaded to the TCMS, so that the failure can be eliminated subsequently.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.

Drawings

FIG. 1 is a schematic diagram of a parking brake control method for an electromechanical braking system of an urban rail vehicle according to the present invention.

FIG. 2 is a schematic block diagram of park brake application at rest for a park brake control method for an electromechanical braking system of an urban rail vehicle according to the present invention.

Among them are: 10. an operation instruction mechanism; 20. a brake control mechanism; 30. an electromechanical actuator; 40. an auxiliary mechanism; 41. a zero speed state monitoring mechanism; 42. an energy storage battery mechanism.

Detailed Description