Railway vehicle braking system and method
AssigneeKorea Railroad Research Institute
InventorsJung Tai Kim, Jai Sung Hong, Kyeong Jun Ko, Moo Sun Kim
Life of this patent
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Abstract
Disclosed are a railway vehicle braking system and method. The railway vehicle braking system includes a braking command generating unit generating a braking command to stop a railway vehicle, a comparison unit determining whether the braking command has been changed, a delay unit delaying and outputting the braking command depending upon a determination result from the comparison unit, and a digital-to-analog converter converting the braking command, which has been delayed by the delay unit, into an analog signal and inputting the analog signal to an actuator.
Claims2
A railway vehicle braking method performed by a railway vehicle braking system, comprising:
- generating a digital braking command signal to stop a railway vehicle based on at least one of a weight and a speed of the railway vehicle, wherein the digital braking command signal is a code signal with a predetermined number of bits;
- comparing a currently generated digital braking command signal with a previously generated digital braking command signal by checking the bits of the digital braking command signal to determine whether the digital braking command signal has been changed;
- delaying and outputting the digital braking command signal depending upon a determination result;
- and
- converting the delayed digital braking command signal into an analog signal and inputting the analog signal to an actuator,
- wherein the digital braking command signal is selectively delayed only when a predetermined change of the digital braking command signal occurs in terms of values of the bits,
- wherein the delaying and outputting the digital braking command signal comprises delaying the digital braking command signal for a predetermined period of time or more,
- wherein the delaying and outputting the digital braking command signal comprises outputting the digital braking command signal in synchronization with a falling edge or a rising edge of a clock signal immediately after the predetermined period of time has elapsed from change of the digital braking command signal.
Dependencies are inferred from the claim text.