Traversing hoists – Having means to prevent or dampen load oscillations – Antisway
Reexamination Certificate
2011-08-16
2011-08-16
Brahan, Thomas J. (Department: 3654)
Traversing hoists
Having means to prevent or dampen load oscillations
Antisway
C212S270000
Reexamination Certificate
active
07997431
ABSTRACT:
An assembly has a mechanically movable element (1), by the movement of which an oscillatory system (2) can be excited to perform an oscillation which has a resonant frequency (f) and a corresponding oscillatory period (T). First of all, a control device (4) moves the mechanically movable element (1) at a first speed (v1). If the control device (4) is stipulated a second speed (v2) by an operator (7), the control device (4) determines a jolt profile, by means of which the speed (v) of the mechanically movable element (1) is changed to the second speed (v2), and moves the mechanically movable element (1) according to the determined jolt profile. Said control device (4) determines the jolt profile in such a way that an oscillation of the oscillatory system (2) which is excited at the beginning of the speed change is calmed at the end of the speed change.
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Ladra Uwe
Schäfers Elmar
Schür Torsten
Brahan Thomas J.
Day Ursula B.
Feiereisen Henry M.
Siemens Aktiengesellschaft
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