Train control device, train control system, and train control method

Abstract

A train control device includes: a control unit that calculates a control speed of the train at a current position with respect to a target speed at a target position of the train, by using a travel distance from the current position to the target position of the train, an altitude difference between the current position and the target position, a braking force of a brake device of the train, first potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the current position, and second potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the target position.

1 . A train control device to be installed in a train, the train control device comprising:
 a storage to store a gradient value of a gradient of a track on which the train travels and store a gradient value change point that is a point at which the gradient value changes; and   processing circuitry   to calculate a control speed of the train at a current position with respect to a target speed at a target position of the train, the processing circuitry using a travel distance from the current position to the target position of the train, an altitude difference between the current position and the target position, a braking force of a brake device of the train, first potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the current position, and second potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the target position, and performing calculation based on a relationship between: kinetic energy and the first potential enemy of the train at the current position, and kinetic energy and the second potential energy of the train at the target position.   
     
     
         2 . The train control device according to  claim 1 , wherein
 the processing circuitry integrates a gradient value of the track in a section from the current position to the target position to calculate the altitude difference, the gradient value being stored in the storage.   
     
     
         3 . The train control device according to  claim 1 , wherein
 the processing circuitry calculates the gradient value at a train position by using: a difference between a first gradient value change point and a second gradient value change point; a difference between a first gradient value corresponding to the first gradient value change point and a second gradient value corresponding to the second gradient value change point; the train position of the train between the first gradient value change point and the second gradient value change point; and the first gradient value or the second gradient value.   
     
     
         4 . The train control device according to  claim 1 , wherein
 the storage further stores information on an altitude at each position of the track, and   the processing circuitry calculates the altitude difference from a difference between an altitude at the current position and an altitude at the target position that are stored in the storage.   
     
     
         5 . The train control device according to  claim 1 , wherein
 the processing circuitry calculates the control speed in such a manner that, when the first potential energy is larger than the second potential energy, the processing circuitry determines that the train is full at the current position and the train is vacant at the target position to calculate the control speed, and when the second potential energy is larger than the first potential energy, the processing circuitry determines that the train is full at the target position and the train is vacant at the current position to calculate the control speed.   
     
     
         6 . The train control device according to  claim 1 , wherein
 when the train at the current position and the train at the target position are superimposed, the processing circuitry determines that passengers are unevenly present at one of the head position or the tail position having a larger altitude difference, to calculate the control speed.   
     
     
         7 . The train control device according to  claim 6 , wherein
 when the train includes a plurality of cars and a mass of passengers in each of the cars is known, the processing circuitry determines that passengers are unevenly present in each of the cars, to calculate the control speed.   
     
     
         8 . The train control device according to  claim 1 , wherein
 when the train at the current position and the train at the target position are superimposed, the processing circuitry determines that passengers are unevenly present in a portion of the train where an altitude at the current position is higher than an altitude at the target position, to calculate the control speed.   
     
     
         9 . A train control system comprising:
 the train control device according to  claim 1 ; and   a brake device.   
     
     
         10 . A train control method of a train control device to be installed in a train, wherein
 the train control device includes a storage to store a gradient value of a gradient of a track on which the train travels and store a gradient value change point that is a point at which the gradient value changes,   the train control method comprising:   calculating a control speed of the train at a current position with respect to a target speed at a target position of the train, using a travel distance from the current position to the target position of the train, an altitude difference between the current position and the target position, a braking force of a brake device of the train, first potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the current position, and second potential energy including an influence of an altitude difference based on a gradient of the track in a section from a head position to a tail position of the train at the target position, and based on a relationship between: kinetic energy and the first Potential energy of the train at the current position, and kinetic enemy and the second potential energy of the train at the target position.   
     
     
         11 . The train control method according to  claim 10 , wherein
 in the calculating, a gradient value of the track in a section from the current position to the target position is integrated to calculate the altitude difference, the gradient value being stored in the storage.   
     
     
         12 . The train control method according to  claim 10 , wherein
 in the calculating, the gradient value at a train position is calculated by using: a difference between a first gradient value change point and a second gradient value change point; a difference between a first gradient value corresponding to the first gradient value change point and a second gradient value corresponding to the second gradient value change point; the train position of the train between the first gradient value change point and the second gradient value change point; and the first gradient value or the second gradient value.   
     
     
         13 . The train control method according to  claim 10 , wherein
 the storage further stores information on an altitude at each position of the track, and   in the calculating, the altitude difference is calculated from a difference between an altitude at the current position and an altitude at the target position that are stored in the storage.   
     
     
         14 . The train control method according to  claim 10 , wherein
 in the calculating, when the first potential energy is larger than the second potential energy, it is determines that the train is full at the current position and the train is vacant at the target position to calculate the control speed, and when the second potential energy is larger than the first potential energy, it is determines that the train is full at the target position and the train is vacant at the current position to calculate the control speed.   
     
     
         15 . The train control method according to  claim 10 , wherein
 in the calculating, when the train at the current position and the train at the target position are superimposed, it is determines that passengers are unevenly present at one of the head position or the tail position having a larger altitude difference, to calculate the control speed.   
     
     
         16 . The train control method according to  claim 15 , wherein
 in the calculating, when the train includes a plurality of cars and a mass of passengers in each of the cars is known, it is determines that passengers are unevenly present in each of the cars, to calculate the control speed.   
     
     
         17 . The train control method according to  claim 10 , wherein
 in the calculating, when the train at the current position and the train at the target position are superimposed, it is determines that passengers are unevenly present in a portion of the train where an altitude at the current position is higher than an altitude at the target position, to calculate the control speed.