Results 21 to 30 of about 6,838,442 (240)

A Screw Theory Approach to Computing the Instantaneous Rotation Centers of Indeterminate Planar Linkages

open access: yesRobotics, 2021
This paper presents a screw theory approach for the computation of the instantaneous rotation centers of indeterminate planar linkages. Since the end of the 19th century, the determination of the instantaneous rotation, or velocity centers of planar ...
Juan Ignacio Valderrama-Rodríguez   +3 more
doaj   +1 more source

An Inverse Kinematics Approach for the Analysis and Active Control of a Four-UPR Motion-Compensated Platform for UAV–ASV Cooperation

open access: yesMachines, 2023
In the present day, unmanned aerial vehicle (UAV) technology is being used for a multitude of inspection operations, including those in offshore structures such as wind-farms.
Pedro Pereira   +2 more
doaj   +1 more source

Dynamic Interaction of a Heavy Crane and a Ship in Wave Motion [PDF]

open access: yesModeling, Identification and Control, 2018
Previous work on the dynamics of vehicle-manipulator systems is extended to offshore ships with heavy cranes. The proposed method is based on a Newton-Euler formulation where the forces of constraint are eliminated using projection matrices based on the ...
Geir Ole Tysse, Olav Egeland
doaj   +1 more source

Development of Two-Way Self-Adaptive Gripper Using Differential Gear

open access: yesActuators, 2022
In this paper, a two-way self-adaptive gripper that has adaptability to external disturbance loads during linear opening/closing pinch actions and adaptability to encompass a variety of shapes during grasping using a single actuator is proposed, unlike ...
Bongki Kang, Joono Cheong
doaj   +1 more source

Screw dislocations in the field theory of elastoplasticity [PDF]

open access: yes, 2002
A (microscopic) static elastoplastic field theory of dislocations with moment and force stresses is considered. The relationship between the moment stress and the Nye tensor is used for the dislocation Lagrangian.
Lazar, Markus
core   +6 more sources

Virtual and Physical Prototyping of Reconfigurable Parallel Mechanisms with Single Actuation

open access: yesApplied Sciences, 2021
The paper presents novel models of reconfigurable parallel mechanisms (RPMs) with a single active degree-of-freedom (1-DOF). The mechanisms contain three to six identical kinematic chains, which provide three (for the tripod) to zero (for the hexapod ...
Alexey Fomin   +4 more
doaj   +1 more source

Parametric analysis and design of straight screw extruder for solids compaction

open access: yesJournal of King Saud University: Engineering Sciences, 2019
Screw extruders are commonly used in the food and polymer industries. Scientifically designed screw extruders for biomass compaction equipment are required to limit the existing problems faced in the industry. In this study, models based on the plug flow
Joseph I. Orisaleye, Sunday J. Ojolo
doaj   +1 more source

Some aspects of the characteristics of vertical screw conveyors for granular material [PDF]

open access: yes, 1974
A theory has been developed, based on a physical model, to describe the behaviour of non-cohesive granular material inside a vertical screw conveyor. By use of this theory, relationships have been derived between dimensionless numbers for capacity, power
Rademacher, F.J.C.
core   +2 more sources

A Survey on Quaternion Algebra and Geometric Algebra Applications in Engineering and Computer Science 1995–2020

open access: yesIEEE Access, 2021
Geometric Algebra (GA) has proven to be an advanced language for mathematics, physics, computer science, and engineering. This review presents a comprehensive study of works on Quaternion Algebra and GA applications in computer science and engineering ...
Eduardo Bayro-Corrochano
doaj   +1 more source

Kinematic Analysis of a Spatial Cable-Driven Mechanism and Its Equivalent Hybrid Mechanism for Elliptical Trajectory

open access: yesMachines, 2023
In this paper, a spatial cable-driven parallel mechanism in a V-shaped cable arrangement is proposed. It is further simplified as a planar hybrid cable-driven parallel mechanism to analyze its kinematics, which consists of two identical active cable ...
Li Wu   +4 more
doaj   +1 more source

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