76 citations · 542 across the 72 of their papers we have counts for
11 papers · 1 filter
A new line-symmetric mobile infinity-pod
Matteo Gallet, Josef Schicho
We construct parallel manipulators with one degree of freedom and admitting infinitely many legs lying on a curve of degree ten and genus six. Our technique relies upon a duality b…
Mobile Icosapods
Matteo Gallet, Georg Nawratil, Josef Schicho +1
Pods are mechanical devices constituted of two rigid bodies, the base and the platform, connected by a number of other rigid bodies, called legs, that are anchored via spherical jo…
Addendum to Pentapods with Mobility 2
Georg Nawratil, Josef Schicho
In a foregoing publication the authors studied pentapods with mobility 2, where neither all platform anchor points nor all base anchor points are located on a line. It turned out t…
7R Darboux Linkages by Factorization of Motion Polynomials
Zijia Li, Josef Schicho, Hans-Peter Schröcker
In this paper, we construct two types of 7R closed single loop linkages by combining different factorizations of a general (non-vertical) Darboux motion. These factorizations are o…
Factorization of Rational Motions: A Survey with Examples and Applications
Zijia Li, Tudor-Dan Rad, Josef Schicho +1
Since its introduction in 2012, the factorization theory for rational motions quickly evolved and found applications in theoretical and applied mechanism science. We provide an acc…
Self-motions of pentapods with linear platform
Georg Nawratil, Josef Schicho
We give a full classification of all pentapods with linear platform possessing a self-motion beside the trivial rotation about the platform. Recent research necessitates a contempo…
Pentapods with Mobility 2
Georg Nawratil, Josef Schicho
In this paper we give a full classification of all pentapods with mobility 2, where neither all platform anchor points nor all base anchor points are located on a line. Therefore t…
Bond theory for pentapods and hexapods
Matteo Gallet, Georg Nawratil, Josef Schicho
This paper deals with the old and classical problem of determining necessary conditions for the overconstrained mobility of some mechanical device. In particular, we show that the…
A Technique for Deriving Equational Conditions on the Denavit-Hartenberg Parameters of 6R Linkages that are Necessary for Movability
Zijia Li, Josef Schicho
A closed 6R linkage is generically rigid. Special cases may be mobile. Many families of mobile 6R linkages have been characterised in terms of the invariant Denavit-Hartenberg para…
An algebraic study of linkages with helical joints
Hamid Abban, Zijia Li, Josef Schicho
Methods from algebra and algebraic geometry have been used in various ways to study linkages in kinematics. These methods have failed so far for the study of linkages with helical…
Four-Pose Synthesis of Angle-Symmetric 6R Linkages
Gábor Hegedüs, Josef Schicho, Hans-Peter Schröcker
We use the recently introduced factorization theory of motion polynomials over the dual quaternions for the synthesis of closed kinematic loops with six revolute joints that visit…