Train braking control method and device supporting multi-stage deceleration, and storage medium

Patent metadata

Field	Value
Publication number	US-12227213-B2
Application number	US-202118013551-A
Country	US
Kind code	B2
Filing date	Nov 4, 2021
Priority date	Sep 28, 2021
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A train braking control method and device supporting multi-stage deceleration, and a storage medium are provided. The method includes the following steps: calculating an initial value of kinetic energy of a train; calculating work of traction force of the train in a process from an initial position to traction removal; calculating work of gravity force of the train in a process from the initial position to a stop; calculating work of braking force of the train in a process from a braking application position to the stop; calculating maximum allowable kinetic energy of the train among all restriction points from the initial position to a stop point; obtaining kinetic energy of the train according to the following formula, determining whether the kinetic energy of the train exceeds the maximum allowable kinetic energy at the restriction point, if so, triggering emergency braking of the train, or else, operating the train normally.

First claim

What is claimed is:

1. A train braking control method supporting multi-stage deceleration, comprising following steps:
step 1, calculating an initial value Ek0 of kinetic energy of a train;
step 2, calculating work of traction force W traction of the train in a process from an initial position to traction removal;
step 3, calculating work of gravity force W g of the train in a process from the initial position to a stop;
step 4, calculating work of braking force W braking of the train in a process from a braking application position to the stop;
step 5, calculating maximum allowable kinetic energy of the train among all restriction points from the initial position to a stop point;
step 6, obtaining kinetic energy E k of the train according to following formula, determining whether the kinetic energy of the train exceeds the maximum allowable kinetic energy at the restriction point, if so, triggering emergency braking of the train, or else, operating the train normally:

E
k

=

E

k
⁢
0

+

W
g

+

W
traction

+

W
braking

,

wherein a specific process of step 4 is as follows:
step A, calculating a velocity V reached by the train after a safe response time according to a current velocity of the train;
step B, calculating an emergency braking rate switching point;
step C, calculating work of braking W bx of the train within a current deceleration interval;
step D, repeating step B to step C after entering a next deceleration interval, until the velocity is zero; and
step E, accumulating work of emergency braking force in all portions to act as total work of braking force W braking .

2. The train braking control method supporting multi-stage deceleration according to claim 1 , wherein a calculation formula in step 1 is as follows:

E

k
⁢
0

=

1
2

·

M

t
⁢
r
⁢
a
⁢
i
⁢
n

⁢

V
⁢
0


2

+

1
2

·

J

R
2

⁢

V
⁢
0


2

,

n which Ek0 is the initial value of the kinetic energy of the train, M train is mass of the train, V0 is an initial velocity of the train, J is a rotational inertia of the train, and R is a wheel radius.

3. The train braking control method supporting multi-stage deceleration according to claim 1 , wherein a calculation formula in step 2 is as follows:

W
traction

(

X
⁢
0

→
X

)

=

∫

X
⁢
0

X

(

M
train

·

Γ
traction

(
X
)

+

J

R
2

⁢

Γ
traction

(
X
)

)

⁢

∂
X

,

in which W traction is the work of traction force, M train is a mass of the train, Γ traction is an acceleration provided by the train when a velocity of the train is V (X), J is a rotational inertia of the train, and R is a wheel radius.

4. The train braking control method supporting multi-stage deceleration according to claim 1 , wherein a calculation formula in step 3 is as follows:

W
g

(

X
⁢
0

→
X

Assignees

• Casco Signal Ltd

Inventors

• Wang Xuchao
• Lv Xinjun
• Chang Ming
• Fang Xing
• Ye Yong
• Hu Jingen

Classifications

• B60T2250/04

  Vehicle reference speed; Vehicle body speed · CPC title

• B60T2250/02

  Vehicle mass · CPC title

• B60T7/126

  Brakes for railway vehicles coming into operation in case of exceeding a predetermined speed (self-acting brakes in general F16D59/00) · CPC title

• B61L15/0062

  On-board target speed calculation or supervision · CPC title

• B61L27/20 Primary

  Trackside control of safe travel of vehicle or train, e.g. braking curve calculation · CPC title