Results 61 to 70 of about 10,826,292 (301)

A new approach to the solution of free rigid body motion for attitude manoeuvers [PDF]

, 2013
A Hamiltonian formulation of free rigid body motion defined on the Special Unitary Group SU(2) is used to integrate the system to obtain a convenient quaternion representation for attitude engineering applications.
Biggs, James, Maclean, Craig, BIGGS, JAMES DOUGLAS, Craig Maclean, Maclean, Craig David, Pagnozzi, Daniele, Daniele Pagnozzi, James D. Biggs   +7 more
core   +1 more source

Modeling, Comparative Investigation and Compensation for Hysteresis Response of Actuator Using Nonlinear Transformation

Actuators
Aiming at problems such as the reduced positioning accuracy and insufficient dynamic response caused by the inherent hysteresis nonlinearity of piezoelectric actuators, this paper proposes a hysteresis modeling and compensation method for piezoelectric ...
Zhisheng Ren, Yuguo Cui, Xingyang Xie, Pan Chen, Yang Yu   +4 more
doaj   +1 more source

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

FEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang, Hyo Been Jin, Chang Min Kim, So Yeon Lee, Hyun Ho Park   +4 more
wiley   +1 more source

Identification for motion control: incorporating constraints and numerical considerations

, 2016
Frequency domain identification is a common starting point for model based motion control. The aim of this paper is to tailor parametric identification methods to the specific class of motion systems.
de Rozario, R., Voorhoeve, RJ Robbert, Oomen, T.A.E., de Rozario, R.; id_orcid, Oomen, TAE Tom, Rozario, R Robin de, Voorhoeve, R.J.   +6 more
core   +1 more source

A novel approach of Consensus-based Finite-time Distributed Sliding Mode Control for Stewart platform manipulators motion tracking

Results in Engineering
The Gough-Stewart Platform, often referred to simply as the Stewart Platform, is a parallel mechanical system with six degrees of freedom, which is widely employed in simulation and precise applications. This study gives a thorough Lagrangian-based model
Duc Cuong Vu, Tung Lam Nguyen, Danh Huy Nguyen   +2 more
doaj   +1 more source

Design and Evaluation of a Pediatric Lower-Limb Exoskeleton Joint Actuator

Actuators, 2020
Lower-limb exoskeletons have undergone significant developments for aiding in the ambulation of adults with gait impairment. However, advancements in exoskeletons for the pediatric population have comparatively been lacking.
Anthony Goo, Curt A. Laubscher, Ryan J. Farris, Jerzy T. Sawicki   +3 more
doaj   +1 more source

Mass estimation considering stiffness and fabrication of period measurement device in mass measurement using velocity-feedback relay control

Nihon Kikai Gakkai ronbunshu, 2021
A mass measurement system with a relay feedback of velocity has been developed to achieve measurement without gravity. In this system, mass is estimated from the periods of oscillation in the relay-feedback system.
Takeshi MIZUNO, Taku EGAWA, Masaya TAKASAKI, Yuji ISHINO   +3 more
doaj   +1 more source

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

FEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta, Hari Baskar Balasubramanian, Amir Pasokh, Marietta Zille   +3 more
wiley   +1 more source

Decomposing of lubricating oil caused the blackening wear of porous polyimide—Or is it?

Friction
In practical applications, the pocket surface of a porous polyimide (PPI) cage often experiences blackening wear, which may lead to lubrication failure. However, the mechanism of blackening wear is still controversial. In this study, the impact of oxygen
Zhengrong Xu, Jinbang Li, Kai Li, Chenchun Shi, Ningning Zhou, Tao Qing, Yuguo Cui   +6 more
doaj   +1 more source

Design, Analysis and Model Predictive Control of an Axial Field Switched-Flux Permanent Magnet Machine for Electric Vehicle/Hybrid Electric Vehicle Applications

Energies, 2018
In this paper, an axial field switched-flux permanent magnet (AFSFPM) machine with stator-PM, which has a high power/torque density and efficiency feature as well as shorter axial length, is designed, analyzed and controlled.
Jilong Zhao, Xiaowei Quan, Mengdie Jing, Mingyao Lin, Nian Li   +4 more
doaj   +1 more source