| 摘要 |
<p>A system for producing a velocity pattern for a vehicle such as an elevator car which must be brought smoothly to a stop accurately aligned with a desired one of a number of stations. The distance between the vehicle and the station at which a stop is required (target distance) is expressed in digital form, and is processed electronically to produce a velocity pattern which results in constant deceleration of the vehicle during the entire approach except for an initial build-up to, and a final tapering off from, the constant deceleration. A single adjustment for deceleration rate automatically adjusts the slowdown distance to the correct value to suit the selected deceleration rate. The calculation is done repetitively at high speed to minimize any lag between the diminishing target distance and the corresponding velocity pattern. Further adjustments permit control of the final tapering off from constant deceleration, with the slowdown distance automatically adjusted to suite these adjustments also.</p> |
