Vision-Based Hybrid Controller to Release a 4-DOF Parallel Robot from a Type II Singularity
Sensors, 2021 The high accuracy and dynamic performance of parallel robots (PRs) make them suitable to ensure safe operation in human–robot interaction. However, these advantages come at the expense of a reduced workspace and the possible appearance of type II ...
José L. Pulloquinga +5 more
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Spatial Stiffness Analysis of the Planar Parallel Part for a Hybrid Model Support Mechanism
Applied Sciences, 2020 The hybrid aircraft model support mechanism is subjected to six directional forces in the experiment, and high spatial stiffness requirement of the parallel part is the guarantee for the stability of the aircraft model.
Jiawei Gu, Zhijiang Xie, Xiaoyong Wu
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Direct extraction of oil from sunflower seeds by twin-screw extruder according to an aqueous extraction process: Feasibility study and influence of operating conditions [PDF]
, 2007 The objective of this study was to evaluate the feasibility of an aqueous process to extract sunflower seed oil using a co-rotating twin-screw extruder. Aqueous extraction was carried out using whole seeds and the influence of the operating conditions on
Evon, Philippe +8 more
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Type synthesis of 6-DOF mobile parallel link mechanisms based on screw theory
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2022 Mobile parallel mechanisms (MPMs), which are parallel mechanisms with moveable bases, have previously been proposed to resolve the limited workspace of conventional parallel mechanisms.
Siying LONG +2 more
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Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method
Advances in Mechanical Engineering, 2013 The design theory and method of formed milling cutter for double-helix screw of progressing cavity pump are presented. Through analyzing the shape and characteristic parameters of double-helix screw, the helicoids equation and axial curve equation of ...
Yun Li +3 more
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Research on Displacement Mode and Path Tracking Method of Square Combined Deployable Mechanism
Xibei Gongye Daxue Xuebao, 2019 The motion path of the developable mechanism can not only grasp whether the mechanism can move according to the expected law, but also provide theoretical support for motion control.
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pyScrew4Mobility: Modul Python untuk Penentuan Mobilitas Manipulator Paralel Berbasis Teori Screw
Metal: Jurnal Sistem Mekanik dan Termal, 2020 This paper addresses the mobility determination of parallel manipulators (PMs) using screw theory with algebra methods on an open-source computer algebra package: Sympy (symbolic python).
Adriyan Adriyan
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Existence and stability of a screw dislocation under anti-plane deformation [PDF]
, 2014 We formulate a variational model for a geometrically necessary screw dislocation in an anti-plane lattice model at zero temperature. Invariance of the energy functional under lattice symmetries renders the problem non-coercive.
Hudson, Thomas, Ortner, Christoph
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Reduced Dynamic Modeling for Heavy-Duty Hydraulic Manipulators With Multi-Closed-Loop Mechanisms
IEEE Access, 2020 A reduced dynamic modeling approach is introduced to systematically establish explicit closed-form dynamic equations for the main motion system of a heavy-duty hydraulic manipulator with multi-closed-loop mechanisms.
Yi Zhang, Wenhua Ding, Hua Deng
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A Treatise on the Theory of Screws [PDF]
Nature, 1901 SIR ROBERT BALL'S “Theory of Screws” is one of the most notable modern extensions of theoretical dynamics. It is based on Poinsot's discovery that every set of forces, regarded as acting on a rigid body, is reducible to a force along one definite line and a couple round the line; combined with Chasles's discovery that every instantaneous motion of a ...
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