Dynamically generated adaptive elevator velocity profile
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United States of America Patent
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-
Jun 21, 1988
Grant Date -
N/A
app pub date -
May 3, 1985
filing date -
May 3, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Elevator velocity profile generation is based upon combining an open loop, least time profile for acceleration with a precision closed loop, phase plane control for deceleration. The deceleration phase-plane velocity profile is generated as a modified mirror image of the acceleration profile, and transition from open loop control is within ride quality constraints. Adaptive control permits operating a drive unit closer to its limits without danger of overloading under worst case conditions, which account for a small percentage of the time. Thus, smaller drive units can be used in a given application with minimal impact on performance.
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