Results 41 to 50 of about 2,061,051 (213)

Finite Element Modelling Method and Dynamic Characteristics of the Revolute Joints of a Simply Supported Bar During Dynamic Buckling

Shock and Vibration
The explicit dynamic finite element method (FEM) has been successfully employed for simulating the buckling response of beam or bar structures under axial impact.
Sai Liu, Weigui Zhang
doaj   +1 more source

Measuring Coulomb and Viscous Friction in Revolute Joint

NUST Journal of Engineering Sciences, 2008
In this research work, the emphasis is on the study of the effects of friction in the revolute joint for fine manipulation of robotic arm manipulators.
Touqeer Sohail, Afzaal M. Malik
doaj   +1 more source

Model-Predictive-Control-Based Time-Optimal Trajectory Planning of the Distributed Actuation Mechanism Augmented by the Maximum Performance Evaluation

Applied Sciences, 2021
Trajectory planning for a redundant manipulator is a classic problem. However, because it is difficult to precisely evaluate its maximum performance, an optimization method has been typically used.
Jong Ho Kim, Kyunghwan Choi, In Gwun Jang   +2 more
doaj   +1 more source

Generalized Task‐Driven Design of Soft Robots via Reduced‐Order Finite Element Method‐Based Surrogate Modeling

Advanced Intelligent Systems, EarlyView.
A unified, reusable modeling pipeline enables task‐driven design of soft robots across actuator families and task scenarios. High‐fidelity simulations are compressed into compact pseudo‐rigid‐body joint surrogates, while a design‐conditioned meta‐model generates new surrogates from geometry parameters without rerunning finite element method.
Yao Yao, David Howard, Perla Maiolino
wiley   +1 more source

Fuzzy adaptive state-feedback control for a revolute-prismatic-revolute robot manipulator

Cogent Engineering, 2019
In this work, a fuzzy adaptive state-feedback control is designed for the stabilization of a three-degree of freedom revolute-prismatic-revolute (RPR) robot manipulator.
N. Nejadkourki, M. J. Mahmoodabadi
doaj   +1 more source

Design Optimization of Soft Fabric Pneumatic Actuators

Advanced Intelligent Systems, EarlyView.
This study presents a systematic optimization framework for elongating and bending fabric‐based soft pneumatic actuators. After a preliminary design‐space reduction, the framework minimizes energy consumption under mechanical performance constraints by integrating validated finite element modeling with statistical surrogate models. Optimal designs were
Grigorios M. Chatziathanasiou, Konstantina Tsintzira, Panagiotis Polygerinos   +2 more
wiley   +1 more source

Omnidirectional Shape Proprioception for Untethered Shape Memory Alloy‐Driven Soft Robotic Arms

Advanced Intelligent Systems, EarlyView.
A lightweight, modular soft robotic arm employs SMA actuation and a multi‐Hall‐magnet sensing system to achieve accurate omnidirectional shape proprioception. Each 35 g segment enables scalable assembly, while robust proprioception supports versatile navigation and manipulation in complex, unstructured environments.
Yiming Ouyang, Zelin Chen, He Chen, Min Xu, Hao Yang, Wei Gao, Hu Jin, Shiwu Zhang   +7 more
wiley   +1 more source

Kinematic Analysis of Parallel Mechanism Without Parasitic Motion

Nanjing Hangkong Hangtian Daxue Xuebao
For a type of prismatic-joint revolute-joint universal-joint-2 prismatic-joint revolute-joint universal-joint pc-joint（PRU‑2PRUPc） parallel mechanism without parasitic motion， the kinematics analysis is performed.
YE Fan, WANG Kai, LYU Xianhai, CAO Yi
doaj   +1 more source

Capturing Revolute Motion and Revolute Joint Parameters with Optical Tracking

IOP Conference Series: Materials Science and Engineering, 2017
Optical tracking of users and various technical systems are becoming more and more popular. It consists of analysing sequence of recorded images using video capturing devices and image processing algorithms. The returned data contains mainly point-clouds, coordinates of markers or coordinates of point of interest.
openaire   +1 more source

Finite element analysis of feeding in red and gray squirrels (Sciurus vulgaris and Sciurus carolinensis)

The Anatomical Record, EarlyView.
Abstract Invasive gray squirrels (Sciurus carolinensis) have replaced the native red squirrel (Sciurus vulgaris) across much of Great Britain over the last century. Several factors have been proposed to underlie this replacement, but here we investigated the potential for dietary competition in which gray squirrels have better feeding performance than ...
Philip G. Cox, Peter J. Watson
wiley   +1 more source