Patent ID: 9517780
Filing Date: 2016-12-13
CPC Classification: B61C,B61L

Claim Text:
1. An apparatus for controlling speed in railway vehicles, the apparatus comprising: a first controller configured to estimate a future train speed and to determine a first speed control to control a train speed based on a TTSLC (Time-To-Speed-Limit Crossing) that is a time taken by a train from a current time to exceed an ATP (Automatic Train Protection) speed profile that is an ATP speed limit; a second controller configured to determine a second speed control to control the train speed based on a difference between the ATP speed profile and actual train speed; and a selection unit configured to select the first speed control or the second speed control in response to the TTSLC and to output the selection to the train, wherein the second controller includes a first generation unit configured to generate an ATO (Automatic Train Operation) speed profile using the ATP speed profile, a second generation unit configured to generate a speed error that is a difference between the ATO speed profile and the actual train speed, and a third controller configured to output the second speed control by performing a PI (Proportionate Integral) control based on the speed error, wherein the first controller includes: wherein the first estimation unit includes: wherein the third estimation unit performs: