Traversing hoists – Having means to prevent or dampen load oscillations – Antisway
Patent
1997-12-05
2000-04-18
Brahan, Thomas J.
Traversing hoists
Having means to prevent or dampen load oscillations
Antisway
212270, B66C 1900
Patent
active
060504293
ABSTRACT:
A method for moving a carriage of a crane a short distance while simultaneously damping the oscillation of its load. The method includes: determining the period of oscillation T of the load; moving the carriage a first displacement from an initial position to a desired final position; moving said carriage a second displacement from the desired final position back to said initial position, a time T/6 after said first displacement; and repeating the first displacement to provide a third displacement from the initial position back to said desired final position, a time T/6 after said second displacement; while causing load oscillations to be damped.
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