Results 11 to 20 of about 795,237 (312)

Design of a compact ultra-wideband MIMO antenna

The Journal of Engineering, 2019
A compact ultra-wideband (UWB) multiple-input multiple-output (MIMO) antenna is presented. The MIMO antenna consists of four monopoles which are printed on FR4 substrate, whose impedance bandwidth is from 2 to 12 GHz, and the isolation of two adjacent ...
Wang Youcheng, Yang Yanjiao, Chi Qingxi, Pei Hucheng   +3 more
doaj   +1 more source

Model-based decoupling control method for dual-drive gantry stages : A case study with experimental validations [PDF]

, 2013
La version éditeur de cet article est disponible à l'adresse suivante : http://dx.doi.org/10.1016/j.conengprac.2012.10.010Industrial motion control of dual–drive gantry stages is usually performed by position controllers acting independently on each ...
COLEMAN, Ralph, GOMAND, Julien, KESTELYN, Xavier, BARRE, Pierre-Jean, GARCÍA-HERREROS, Iván   +4 more
core   +2 more sources

A power-based perspective of mechanical systems [PDF]

, 2005
This paper is concerned with the construction of a power-based modeling framework for a large class of mechanical systems. Mathematically this is formalized by proving that every standard mechanical system (with or without dissipation) can be written as ...
D. Jeltsema, Jeltsema, D.,, J.M.A. Scherpen, Scherpen, J. M. A., Jeltsema, D., Scherpen, J. M. A.,   +5 more
core   +1 more source

Depth-dependent ratcheting strains of young and adult articular cartilages by experiments and predictions

BioMedical Engineering OnLine, 2019
Background Ratcheting strain is produced due to the repeated accumulation of compressive strain in cartilage and may be a precursor to osteoarthritis.
Li-Lan Gao, Xiang-Long Lin, Dong-Dong Liu, Ling Chen, Chun-Qiu Zhang, Hong Gao   +5 more
doaj   +1 more source

Multi-physic system simplification method applied to a helicopter flight axis active control [PDF]

, 2012
A helicopter flight axis control, which is a complex multi-physic system, is modelled using an energetic based graphical tool: the Energetic Macroscopic Representation.
GOMAND, Julien, Francois Malburet, Pierre-Jean Barre, BARRE, Pierre-Jean, MARTIN, Mikael, Mikael Martin, Julien Gomand, MALBURET, François   +7 more
core   +1 more source

Design, Dynamics, and Optimization of a 3-DoF Nonlinear Micro-Gyroscope by Considering the Influence of the Coriolis Force

Micromachines, 2022
In this paper, we use the nonlinear hardening stiffness of drive mode deal with the contradiction between gain and bandwidth of the linear micro-gyroscope, to improve the bandwidth and gain in sense direction.
Sai Wang, Linping Lu, Kunpeng Zhang, Shuying Hao, Qichang Zhang, Jingjing Feng   +5 more
doaj   +1 more source

A path planning algorithm fusion of obstacle avoidance and memory functions

Cognitive Computation and Systems, 2023
In this study, to address the issues of sluggish convergence and poor learning efficiency at the initial stages of training, the authors improve and optimise the Deep Deterministic Policy Gradient (DDPG) algorithm.
Qingchun Zheng, Shubo Li, Peihao Zhu, Wenpeng Ma, Yanlu Wang   +4 more
doaj   +1 more source

Coordination of Multiple Robotic Vehicles in Obstacle-Cluttered Environments

Robotics, 2021
In this work, we consider the motion control problem for a platoon of unicycle robots operating within an obstacle-cluttered workspace. Each robot is equipped with a proximity sensor that allows it to perceive nearby obstacles as well as a camera to ...
Charalampos P. Bechlioulis, Panagiotis Vlantis, Kostas J. Kyriakopoulos   +2 more
doaj   +1 more source

Model-based (Mechanical) Product Design [PDF]

, 2011
Lien vers la version éditeur: http://link.springer.com/chapter/10.1007/978-3-642-24485-8_40Mechanical product engineering is a research and industrial activity which studies the design of complex mechanical systems.
Lionel Roucoules, IRAQI, Mehdi, ROUCOULES, Lionel, Mehdi Iraqi-Houssaini, KLEINER, Mathias, Mathias Kleiner   +5 more
core   +1 more source

Optimal Control of Mechanical Systems [PDF]

International Journal of Differential Equations, 2007
In the present work, we consider a class of nonlinear optimal control problems, which can be called “optimal control problems in mechanics.” We deal with control systems whose dynamics can be described by a system of Euler‐Lagrange or Hamilton equations.
openaire   +4 more sources