B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
B66C 13/06 (2006.01)
Patent
CA 2107997
The object of the invention is a method of controlling a crane or a similar apparatus, utilized e.g. in controlling an overhead crane, wherein the crane attendant applies velocity request (Vref) from the control system of the crane to the operating means of the crane as control sequences and the velocity requests (Vref) applied by the at- tendant are read into the control system. To improve controllability of the crane, the velocity request (Vref) is compared to the previous ve- locity request and if the velocity request has changed, an accelerating sequenoe for the corresponding change in velocity is provided, subse- quently storing the resultant accelerating sequence, whereafter, or if the velocity request remains unchanged, the changes in velocity deter- mined by the stored accelerating sequences at a given time are added up and this sum (dV) is added to the previous velocity request (Vref), the resultant sum providing a new velocity request (Vref2), which is set as a new control command and velocity request (Vref2) for the op- erating means of the crane.
Borden Ladner Gervais Llp
Materials Handling International S.a.
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