G - Physics – 05 – D
Patent
G - Physics
05
D
346/63, 341/86
G05D 1/00 (2006.01) B60L 15/32 (2006.01)
Patent
CA 1049117
ABSTRACT OF THE DISCLOSURE Clock pulses representative of the velocity error between desired and actual train speeds drive an advance train line (ATL) register to count up or down, in accordance with the sign of the error, between zero and a selected maximum count position. The existing total count is continuously applied to a D/A converter to provide a stepped analog signal which drives an advance train line channel to vary the propulsion effort of the train, car by car, to the next adjacent level, increasing or decreasing per the direction of the counting action. Attain- ment of either count limit by the ATL register generate, through logic circuitry, a clock pulse to drive the associated propulsion train line (PTL) encoder in the same direction to the opposite count limit during generation of the PTL clock pulse, to continue the stepped variation of the propulsion level in the same direction. The previously achieved full ATL propulsion level is meanwhile held until the PTL encoder shifts to the equivalent base condition. All ATL counting action is inhibited by various saturated conditions within the PTL encoder.
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