Automatic setting of the parameters of a profile generator for a

Details Automatic setting of the parameters of a profile generator for a Automatic setting of the parameters of a profile generator for a

1993-02-16

1995-01-03

Stephan, Steven L.

Elevator, industrial lift truck, or stationary lift for vehicle

With barrier for regulating access to load support

Includes motor or motor driven linkage for shifting barrier

B66B 1314

Patent

active

053788613

ABSTRACT:
In response to requested flight time, creep in distance, creep out distance and creep speed, a profile for opening or closing an elevator door is provided. The distance over which acceleration and deceleration must occur is the doorway distance less the distance which would be covered at the creep speed. Maximum speed is the acceleration distance over the acceleration time (1/4 of the requested flight time, to allow for jerk to both increase and decrease both acceleration and deceleration). Acceleration is the maximum speed over the acceleration time, and jerk is acceleration over the acceleration time. Actual flight time is calculated, taking into account maximum acceleration and velocity, and periods of constant acceleration and velocity, if any.

REFERENCES:
patent: Re33668 (1991-08-01), Gray
patent: 4342379 (1982-08-01), Games et al.
patent: 5131506 (1992-07-01), Mizumo
patent: 5162711 (1992-11-01), Heckler

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