Erschienen: 26.10.2020 Abbildung von Hartl-Nesic | Surface-Based Path Following Control on Freeform 3D Objects | 1. Auflage | 2020 |


Surface-Based Path Following Control on Freeform 3D Objects

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Buch. Softcover


143 S. 28 farbige Abbildungen.

In englischer Sprache

Shaker Verlag. ISBN 978-3-8440-7637-0

Format (B x L): 16.7 x 23.8 cm

Gewicht: 268 g


Today, process automation solutions strongly rely on programmable and multi-functional robotic manipulators to perform repetitive and for the human operator partly tedious processing tasks for large-scale series productions. Many of these processes require the movement of a robot-mounted tool along a given geometric path defined in the Cartesian space. From a control engineering perspective, this task is called path following control and emerges in processes such as milling and cutting. The work at hand is concerned with the development of a novel surface-based path following control concept for the processing of 3D objects. In contrast to classical path following control, the presented control concept systematically takes into account the surface normal vector of an underlying freeform 3D surface and the path tangent vector of the surface-based path. Using a coordinate transformation and feedback linearization, the nonlinear robotic system dynamics is transformed into a system with linear input/output behavior in new path-based coordinates. Moreover, industrial processes on freeform 3D surfaces are described in terms of kinematic constraints, i.e. forbidden tool motions, and kinematic redundancies, i.e. free self-motions of the tool. The control concept is validated experimentally with a KUKA LBR iiwa 14 R820 by a novel approach for the versatile application of (curved) pre-cut adhesive tapes on freeform 3D surfaces. The experimental design of the demonstrator results from a thorough concept study. Surface-based path following control is a general and modular framework to describe and perform various industrial processes on freeform 3D surfaces with diverse kinematic and dynamic requirements, e.g., polishing, laser cutting, sewing, and spray painting.

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