4 papers
Higher-Order Flexible Configurations of Planar Parallel Manipulators Constructed by Averaging
Yudi Zhao, Georg Nawratil
This paper investigates singular configurations of planar 3-RPR parallel manipulators, which result from applying the averaging technique to solution pairs of their direct kinemati…
Construction and deformation of P-hedra using control polylines
Georg Nawratil
In the 19th International Symposium on Advances in Robot Kinematics the author introduced a novel class of continuous flexible discrete surfaces and mentioned that these so-called…
Flexible arrangement of two Bennett tubes
Georg Nawratil
In analogy to flexible bipyramids, also known as Bricard octahedra, we study flexible couplings of two Bennett mechanisms. The resulting flexible bi-Bennett structures can be used…
On flexes associated with higher-order flexible bar-joint frameworks
Georg Nawratil
The famous example of the double-Watt mechanism given by Connelly and Servatius raises some problems concerning the classical definitions of higher-order flexibility and rigidity,…