Circuit arrangement for controlling the propulsion, braking and

Details Circuit arrangement for controlling the propulsion, braking and Circuit arrangement for controlling the propulsion, braking and

1975-05-27

1977-02-01

Kunin, Stephen G.

Railway switches and signals

Cab signal or train control

Speed-control systems

104149, 23515024, 246187R, B61L 316

Patent

active

040058379

ABSTRACT:
A propulsion, braking, and station stopping control circuit for a rapid transit train including a first summing and amplifying apparatus for producing a velocity signal which is a function of the desired and actual velocity of the train and including a second summing and amplifying apparatus for producing a propulsion error signal which is a function of the velocity signal and an actual acceleration signal. An absolute value and sign determining apparatus for receiving the propulsion error signal and for producing an up-down signal which is to be supplied to an advanced train line register and propulsion train line encoder and for producing an analog signal which is supplied to a clock for generating pulses which are applied to the advanced train line register. Apparatus for producing a speed control braking error signal which is a function of the velocity signal and an actual acceleration signal. First gate apparatus for applying the speed control error signal to an output amplifying apparatus which provides a brake error signal to a train line wire driver. Third summing apparatus for producing a station stop brake error signal which is a function of the actual acceleration and calculated deceleration signals. Second gating apparatus for receiving the station stop brake error signal and comparing apparatus for enabling the second gating apparatus when the calculated deceleration and desired acceleration signals are equal so that the station stop brake error signal is applied to the output amplifying apparatus for providing a brake error signal on the train line wire driver.

REFERENCES:
patent: 3363096 (1968-01-01), Hughson et al.
patent: 3395275 (1968-07-01), Baughman
patent: 3538325 (1970-11-01), Smith et al.

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