US 9,809,235 B2
Automatic train operation system in railway vehicles
Jongchul Jung, Seoul (KR); and Yong Gee Cho, Seoul (KR)
Assigned to LSIS CO., LTD., Anyang-si (KR)
Filed by LSIS CO., LTD., Anyang-si, Gyeonggi-do (KR)
Filed on Aug. 24, 2015, as Appl. No. 14/834,301.
Claims priority of application No. 10-2014-0121883 (KR), filed on Sep. 15, 2014.
Prior Publication US 2016/0075357 A1, Mar. 17, 2016
Int. Cl. B61L 25/00 (2006.01); B61L 27/04 (2006.01); B61L 25/02 (2006.01); B61L 27/00 (2006.01)
CPC B61L 27/04 (2013.01) [B61L 25/021 (2013.01); B61L 25/025 (2013.01); B61L 27/0038 (2013.01); B61L 27/0094 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An automatic train operation system mounted on a railway vehicle and configured to control speed of the railway vehicle while performing automatic or unmanned operation, the system comprising:
a speed profile receiver configured for generating speed profile information based on a limited speed profile received from on-board equipment or a tachometer;
a database configured for storing track gradient information and track curvature information for each of a plurality of track segments;
a controller configured for controlling the speed of the railway vehicle using a current position of the railway vehicle, a current speed of the railway vehicle and the generated speed profile information; and
a propulsion system fault determiner configured for:
determining fault status of a propulsion system based on the current speed, the track gradient information, the track curvature information and propulsion notch information;
calculating a performance depreciation ratio when a fault in the propulsion system is determined; and
providing the performance depreciation ratio to the controller,
wherein the controller is further configured for compensating for the performance depreciation ratio by increasing a propulsion notch value according to the provided performance depreciation ratio,
wherein the propulsion system fault determiner comprises:
a traction calculator configured for calculating a required traction using the current speed and the propulsion notch information; and
a required acceleration calculator configured for calculating a required acceleration using the current speed, the calculated required traction, the track curvature information and the track gradient information;
wherein the propulsion system fault determiner determines that the propulsion system is abnormal when a status acceleration error value is greater than a set value and determines that the propulsion system is normal otherwise, and
wherein the status acceleration error value is calculated by subtracting the current acceleration from the required acceleration and dividing the result by the required acceleration.