Results 81 to 90 of about 623,221 (296)

Inverse kinematics of RRR manipulator

open access: yes, 2023
Tema ovog završnog rada je bila izvod kinematike manipulatora RRR strukture te jednadžbi inverzne kinematike. Dan je pregled metoda za rješavanje inverzne kinematike te opis problema praćenja unaprijed zadane putanje manipulatora.
Dražić, Tomislav
core  

Absorption of Broadband Low‐Frequency Sound Beyond the Thermodynamics Limit: An Acoustic Resonator With Magnetic Bearing

open access: yesAdvanced Science, EarlyView.
This work presents a magnetic‐bearing acoustic resonator that overcomes the thermodynamics limit of sound absorption. By introducing tunable negative stiffness, it achieves broadband low‐frequency absorption within a compact cavity, far exceeding the performance achievable by classic mass‐tuned designs.
Ying Hu   +5 more
wiley   +1 more source

A closed-loop framework for inverse kinematics of the 7-DOF manipulator

open access: yes, 2016
The 7-DOF redundant manipulator in greatly improves the obstacle/singularity avoidance capability and operational flexibility. Meanwhile, its inverse kinematics problem would be much difficult since it has an infinite number of solutions. This paper uses
Wang Z(王争)   +5 more
core  

From Folding Mechanics to Robotic Function: A Unified Modeling Framework for Compliant Origami

open access: yesAdvanced Science, EarlyView.
A geometry‐consistent DDG framework captures compliant origami deformation from rigid‐like folding to soft panel bending. By tuning crease and panel stiffness, bistable snap‐through responses transform into smooth monostable deformation, enabling programmable stability and robot‐scale locomotion.
Bohan Zhang   +7 more
wiley   +1 more source

A Precise Positioning Method for a Puncture Robot Based on a PSO-Optimized BP Neural Network Algorithm

open access: yesApplied Sciences, 2017
The problem of inverse kinematics is fundamental in robot control. Many traditional inverse kinematics solutions, such as geometry, iteration, and algebraic methods, are inadequate in high-speed solutions and accurate positioning.
Guanwu Jiang   +3 more
doaj   +1 more source

Solving the Singularity Problem of Non-Redundant Manipulators by Constaint Optimization [PDF]

open access: yes, 1999
A solution to the singularity problem of a non-redundant robot is proposed by reformulating the inverse kinematic problem as a constraint optimization problem.
Hirzinger, Gerd   +2 more
core  

Unraveling Hierarchical B‐Site Ordering: Mechanism of Microwave Dielectric Enhancement in Complex Perovskite Oxide Ceramics

open access: yesAdvanced Science, EarlyView.
This study maps out the hierarchical ordering in 1:2 B‐site complex perovskite ceramics using a comprehensive multiscale characterization route. It turns out that intradomain strain, oxygen vacancies, and Mg disorder within the ordered domains act as strong phonon scatterers.
Qingqiao Fu   +6 more
wiley   +1 more source

Solving robotic kinematic problems : singularities and inverse kinematics

open access: yes, 2023
Kinematics is a branch of classical mechanics that describes the motion of points, bodies, and systems of bodies without considering the forces that cause such motion. For serial robot manipulators, kinematics consists of describing the open chain geometry as well as the position, velocity and/or acceleration of each one of its components. Rigid serial
openaire   +4 more sources

Inverse kinematics of redundant manipulator used in Tele-operation

open access: yes, 2015
To address the problem that joints would exceed limitation in motion control of Tele-operation, a novel efficient inverse kinematics method for the 7 DOF manipulator of the thermonuclear fusion reactor to trajectory planning is presented in this paper ...
Yang JJ(杨君娟)   +3 more
core  

Bistable Networks Enable Complex Shape Changes

open access: yesAdvanced Science, EarlyView.
Transition‐controlled metamaterials are networks of bistable mechanical memory that store local binary states and express them as global shape change. By decoupling low‐force programming from high‐force holding, a single lattice is reconfigured into distinct 2D profiles and 3D surfaces without continuous actuation, enabling reusable morphing materials ...
Sawyer Thomas, Jeffrey Lipton
wiley   +1 more source

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