Results 11 to 20 of about 80,117 (291)
Electronic Journal of Qualitative Theory of Differential Equations, 2014 In this article we obtain the geometric classification of singularities, finite and infinite, for the three subclasses of quadratic differential systems with $m_f=4$ possessing exactly two finite singularities, namely: (i) systems with two double complex
Joan Artés +4 more
doaj +1 more source
Kinematics and Singularity Analysis of a 7-DOF Redundant Manipulator
Sensors, 2021 A new method of kinematic analysis and singularity analysis is proposed for a 7-DOF redundant manipulator with three consecutive parallel axes. First, the redundancy angle is described according to the self-motion characteristics of the manipulator, the ...
Xiaohua Shi +4 more
doaj +1 more source
Electronic Journal of Qualitative Theory of Differential Equations, 2015 In this article we obtain the geometric classification of singularities, finite and infinite, for the two subclasses of quadratic differential systems with total finite multiplicity $m_f=4$ possessing exactly three finite singularities, namely: systems ...
Joan Artés +3 more
doaj +1 more source
Generic singular configurations of linkages
Topology and its Applications, 2012 We study the topological and differentiable singularities of the configuration space C( ) of a mechanical linkage in d-dimensional Euclidean space, defining an inductive sufficient condition to determine when a configuration is singular. We show that this condition holds for generic singularities, provide a mechanical interpretation, and give an ...
Blanc, David, Shvalb, Nir
openaire +2 more sources
Solvable Groups, Free Divisors and Nonisolated Matrix Singularities II: Vanishing Topology [PDF]
, 2013 In this paper we use the results from the first part to compute the vanishing topology for matrix singularities based on certain spaces of matrices. We place the variety of singular matrices in a geometric configuration of free divisors which are the ...
Brian Pike +16 more
core +3 more sources
Workspace and Singularity analysis of a Delta like family robot [PDF]
, 2015 Workspace and joint space analysis are essential steps in describing the task and designing the control loop of the robot, respectively. This paper presents the descriptive analysis of a family of delta-like parallel robots by using algebraic tools to ...
A Pashkevich +15 more
core +4 more sources
Electronic Journal of Qualitative Theory of Differential Equations, 2017 In the article [C. Bujac, J. Llibre, N. Vulpe, Qual. Theory Dyn. Syst. 15(2016), 327–348] for the family of cubic differential systems with the maximum number of invariant straight lines, i.e.
Cristina Bujac, Nicolae Vulpe
doaj +1 more source
Taming triangulation dependence of T 6/ℤ2 × ℤ2 resolutions
Journal of High Energy Physics, 2022 Resolutions of certain toroidal orbifolds, like T 6/ℤ2 × ℤ2, are far from unique, due to triangulation dependence of their resolved local singularities. This leads to an explosion of the number of topologically distinct smooth geometries associated to a ...
A. E. Faraggi +2 more
doaj +1 more source
Unified Singularity Crossing of a 3-(rR)PS Metamorphic Parallel Mechanism through Dynamic Modeling
Machines, 2023 Metamorphic parallel mechanisms can change into multiple configurations with different motion types and mobility, which consequently yield different solutions of inverse dynamics when crossing singularity.
Latifah Nurahmi +2 more
doaj +1 more source
Mean directionally curved lines on surfaces immersed in R4 [PDF]
, 2003 The notion of principal configuration of immersions of surfaces into R3, due to Sotomayor and Gutierrez [16] for lines of curvature and umbilics, is extended to that of mean directional configuration for immersed surfaces in R4.
Mello, Luis Fernando
core +3 more sources