CPC B61L 25/021 (2013.01) [B60T 8/1705 (2013.01); B60T 8/1761 (2013.01); B60T 8/245 (2013.01); B60T 2250/04 (2013.01); B60T 2250/042 (2013.01); B61C 15/08 (2013.01)] | 17 Claims |
1. A system for measuring motion of a locomotive vehicle, comprising:
a speed sensor configured to measure wheel speed of the locomotive vehicle,
a decelerometer including a level-sensitive device configured to measure acceleration or deceleration of the locomotive vehicle as a function of a tilt from a level position, and
an onboard processing unit configured to:
compute a current grade traversed by the locomotive vehicle prior to detection of a slip or slide condition based on a first measurement signal from the decelerometer,
detect a slip or slide condition based on a measurement signal from the speed sensor,
upon detection of the slip or slide condition, obtain a second measurement signal from the decelerometer,
filter out the current grade from the second measurement signal of the decelerometer, and
determine an actual acceleration or deceleration of the locomotive vehicle during the slip or slide condition from the filtered second measurement signal from the decelerometer.
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