(57) Turntable ladder or the like, with a telescopic ladder unit and, attached at the
end of the ladder unit, an articulated arm which carries a cage, which turntable ladder
contains a control for moving the ladder sections, formed in such a way that, during
cage travel, vibrations of the ladder sections are suppressed, while at least one
of the measured variables, bending of the ladder unit in the horizontal and vertical
direction, angle of elevation, angle of rotation, run-out length and torsion of the
ladder unit is fed back via a controller to the control variables for the drives and
for which a pilot control is provided which represents the idealised movement behaviour
of the ladder during cage travel in a dynamic model, based on differential equations
and calculates the idealised control variables for the ladder section drives from
the dynamic model for an essentially vibration-free movement of the ladder.
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