A method and related device for reducing resonant vibrations and dynamic loads of cranes, where vertical motion of a pay load is controlled by a boom winch and a hoist winch. In an embodiment, the method includes determining resonance frequencies of the crane boom and pay load from inertia data of the boom and stiffness on at least the boom and hoist ropes, the resonance frequencies including a first frequency and a lower second frequency. In addition, the method includes automatically modifying the motion of the boom winch or the hoist winch to induce a damping inducing winch motion in the boom or hoist winch, by tuning a proportional integral (PI)-type boom winch speed controller or a PI-type hoist winch speed controller. The boom winch speed controller is tuned to absorb energy at the second frequency, the hoist winch speed controller is tuned to absorb energy at the first frequency.
METHOD FOR REDUCING DYNAMIC LOADS OF CRANES
VERFAHREN ZUR REDUZIERUNG DYNAMISCHER BELASTUNGEN VON KRÄNEN
PROCÉDÉ DE RÉDUCTION DE CHARGES DYNAMIQUES DE GRUES
2016-06-15
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |
SAE Technical Papers | 1959
|Engineering Index Backfile | 1960
|Engineering Index Backfile | 1959
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