A Relational Positioning Methodology for Robot Task Specification and Execution

Abstract--This paper presents a relational positioning methodology that allows to restrict totally or partially the movements of an object by specifying its allowed positions in terms of a set of intuitive geometric constraints. In order to derive these positions, a geometric constraint solver must be used. To this end, positioning mobile with respect to fixed (PMF), a geometric constraint solver for the relational positioning of rigid objects in free space is introduced. The solver exploits the fact that, in a set of geometric constraints, the rotational component can often be separated from the translational one and solved independently. PMF may be used as an interface for specifying offline-programmed robot tasks, as well as for assisting the execution of teleoperated tasks requiring constrained movements. Examples describing both the solver's operation and typical applications are discussed.

• Type: Journal
• Year: 2008
• Where: TROB
• Authors: Adolfo Rodriguez, Luis Basañez, Enric Celaya
• Keywords: Geometric Constraints, Relational Positioning, Relational Positioning Methodology, TROB 2008