2 - Schneider Electric CZ, s.r.o.

Presentation
SoMachine software &
Application Function Blocks library
Improving performance
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Advanced slewing control
> > Construction cranes
Typical applications
> > Tower Cranes with
Jib > 40 m
Optimize cycle of operation of Tower cranes
This innovative function controls the rotation of the crane taking into account the
flexibility of the mechanical structure.
This function generates outstanding smooth and accurate movements on crane
slewing leading to precise positioning on target.
Benefits
Save production time
> > Reduce working cycle time and increase precision
> > Very efficient on big cranes where other algorithm are failing due to huge
flexibility of crane structure..
Increase crane service life
> > Reduce mechanical shocks and stress on the crane mechanism an structure.
Reduce risk
> > Reduce operator stress and fatigue
> > Reduce oscillation of the jib
Easy to install
> > Simple settings, at the commissioning the controller performs self tuning
sequence
> > No additional sensor.
Operating principle
> > During commissioning analysis of the natural frequency on the crane is
performed, in order to get the automatic setting of the correction
> > This function block generates optimum speed profile for the Slewing motor on
the fly
> > At any time a dynamic correction is performed, leading to the optimized rotation
control with the maximum of speed and accuracy.
Characteristics
This control has been specially designed mainly for big cranes (Tall Tower and Long
jib).
This control is available with Drive series ATV 312, ATV 32, ATV 71.
This function is compatible with all others functions developed for Construction cranes
(Speed Optimization, Wind control, Overload control, etc )
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Controller
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Estimator
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