Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1975-11-03
1978-02-07
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
214 23, 202262, C10B 3500
Patent
active
040728854
ABSTRACT:
A method and control apparatus are disclosed for providing incremental position regulation of industrial apparatus, and for synchronizing movement of the apparatus, where an illustration of such industrial apparatus could be a coke transfer hot car, moving along a track at the coke side of a coke oven chamber, in conjunction with the forward advancement of a pusher ram, in the direction of proceeding through a coking chamber from the pusher machine side thereof. The present method and control apparatus are characterized by generating pulses that are encoded to represent actual incremental position displacements of the pusher ram. These pulses are used in a feedback control loop for positioning and speed control for the ram, and the pulses are used by a central controller to produce signal pulses representing the desired displacement for the associated hot coke transfer car. The signal pulses are transmitted to control a drive system for the car, which is additionally controlled by a feedback control loop using car position pulses generated to represent the actual displacement of the car. The car position pulses are also transmitted to the central controller, where the signal pulses to the drive for the car are modified to establish and then maintain a steady-state position lag error and constant speed relationship between the ram and the car. The car position pulses are used in the central controller as a feedback control for permissive continued position advancement of the pusher ram.
REFERENCES:
patent: 2828481 (1958-03-01), Latapie
patent: 2849128 (1958-08-01), Sloss
patent: 3124736 (1964-03-01), Randell
patent: 3502234 (1970-03-01), Cook
patent: 3562514 (1969-03-01), Brand, Jr.
patent: 3897311 (1975-07-01), Krenke
Brodahl R. G.
Dobeck B.
Westinghouse Electric Corp.
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