Method and system for virtually coupled train set control

Patent metadata

Field	Value
Publication number	US-12403945-B2
Application number	US-202318392173-A
Country	US
Kind code	B2
Filing date	Dec 21, 2023
Priority date	May 23, 2023
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

A method and system for virtually coupled train set (VCTS) control is provided. The method includes following steps: determining whether to execute a backup control strategy based on an actual state for a current cycle of each train unit and a target state sequence for a first preset number of cycles before the current cycle to obtain a first determination result; if the first determination result is yes, executing the backup control strategy to control each train unit; if the first determination result is no, calculating the target state sequence for the current cycle of each train unit according to a position or calculating the target state sequence for the current cycle of each train unit by using a synchronization relationship; and controlling each train unit according to the target state sequence for the current cycle of each train unit, respectively.

First claim

The invention claimed is:

1. A method for virtually coupled train set (VCTS) control, comprising:
acquiring an actual state for a current cycle of each train unit in VCTS;
determining whether to execute a backup control strategy based on the actual state for the current cycle of each train unit and a target state sequence for a first predetermined number of cycles before the current cycle, to obtain a first determination result; wherein the backup control strategy comprises a control strategy for tracking a recommended driving curve by a first train unit and a control strategy for tracking a i-th train unit by a (i+1)-th train unit, wherein a value of i is greater than or equal to 1;
executing the backup control strategy to control each train unit, if the first determination result is yes;
executing following operations, if the first determination result is no:
determining whether synchronization of each train unit in the VCTS meets a predetermined condition, to obtain a second determination result;
calculating a target state sequence for the current cycle of each train unit based on a position according to the actual state for the current cycle of each train unit, if the second determination result is yes;
calculating the target state sequence for the current cycle of each train unit by using a synchronization relationship according to the actual state for the current cycle of each train unit, if the second determination result is no;
controlling each train unit according to the target state sequence for the current cycle of each train unit, respectively.

2. The method according to claim 1 , wherein the determining whether to execute a backup control strategy based on the actual state for the current cycle of each train unit and a target state sequence for a first predetermined number of cycles before the current cycle to obtain a first determination result comprises:
determining whether a flag bit of a first cycle before the current cycle is displayed normally, to obtain a third determination result;
determining whether a difference between an actual speed for the current cycle of each train unit and a first target speed in a target state sequence for n cycles before the current cycle is less than a speed difference threshold, if the third determination result is yes; wherein if the difference between the speed of for the current cycle of each train unit and the first target speed in the target state sequence in for the n cycles before a the current cycle is less than the speed difference threshold, the first determination result is yes, and a flag bit of the current cycle is set as normal, otherwise, the first determination result is no, and the flag bit of the current cycle is set as abnormal;
determining whether a difference between the actual speed for the current cycle of each train unit and a first target speed in a target state sequence for m cycles before the current cycle is less than the speed difference threshold, if the third determination result is no; wherein if the difference between the speed for of the current cycle of each train unit and the first target speed in the target state sequence in for the m cycles before a the current cycle is less than the speed difference threshold, the first determination result is yes, and the flag bit of the current cycle is set as normal, otherwise, the first determination result is no, and the flag bit of the current cycle is set as abnormal, wherein n and m are values of the first predetermined number in different situations, and m≥n.

3. The method according to claim 1 , wherein the determining whether synchronization of each train unit in the VCTS meets a predetermined condition to obtain a second determination result comprises:
confirming that the second determination result is yes when time index deviations between any two adjacent train units in the VCTS are all less than a time index deviation threshold;
confirming that the second determination result is no when the time index deviations between any two adjacent train units in the VCTS are not all less than the time index deviation threshold.

4. The method according to claim 1 , wherein the calculating a target state sequence for the current cycle of each train unit based on a position according to the actual state for the current cycle of each train unit comprises:
determining, according to an actual position and an actual speed for the current cycle of each train unit, an initial target state as:

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Assignees

• Univ Beijing Jiaotong

Inventors

• Liu Hongjie
• Luo Xiaolin
• Tang Tao
• Chai Ming
• Su Shuai
• Lv Jidong

Classifications

• B61L27/10

  Operations, e.g. scheduling or time tables · CPC title

• B61L25/021

  Measuring and recording of train speed · CPC title

• B61L23/34

  for indicating the distance between vehicles or trains by the transmission of signals therebetween · CPC title

• B61L27/40

  Handling position reports or trackside vehicle data · CPC title

• B61L27/33

  Backup systems, e.g. switching when failures occur · CPC title