Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Echtzeitfähige PKM-optimierte Bahnplanung

: Schröder, T.

Zeitschrift für wirtschaftlichen Fabrikbetrieb : ZWF 101 (2006), No.10, pp.579-584
ISSN: 0947-0085
Journal Article
Fraunhofer IWU ()
PKM; Bahnplanung; Transformation; Dynamik; Geschwindigkeitsprofil; path generation; motion planning; lenearising

The potential advantages of parallel kinematic machines will only be used if software and hardware collaborate optimally. Nevertheless, in common CNCs the calculations are often still based on the conditions of serial kinematic machines. The transformation from Cartesian axes to machine axes is done at the end of the control cycle, after all other computations are finished. Before this, so called worst case limits, linearesing he machine's behaviour, are usefully used.
This article presents an algorithm for path generation that consequently integrates the non-linearity of the parallel kinematic machine's dynamic limits. Based on a polygon path, a smoothed path is generated, later a velocity profile is calculated, and finally a trajectory of time-indexed points is generated. The dynamic limits of the parallel kinematic machine at hte actual position are always regarded in the calculations.