Results 11 to 20 of about 4,024,921 (250)

Steady-state modelling and performance of a rotary direct drive digital valve

open access: yesMeasurement + Control, 2020
A rotary direct drive digital valve driven by a stepper motor was proposed. By analysing its working principle, the steady-state mathematical model reflecting the relationship between the pressure, the flow and the angular displacement was deduced. Based
Yuesong Li
doaj   +1 more source

Design and Control of a Transverse Flux Linear Switched Reluctance Machine for Rail Transit Application

open access: yesIEEE Access, 2022
The design, optimization and control methods of a transverse flux Linear Switched Reluctance Motor (LSRM) for the rail transit application are introduced. Two structures of LSRMs, EI type and EE type, are compared and analyzed.
Xinliang Li   +5 more
doaj   +1 more source

Development of an Arduino based universal testing apparatus [PDF]

open access: yesArchives of Agriculture Sciences Journal, 2021
The mechanical properties of agriculture materials are critically important for a wide range of applications such as packaging, transporting, sorting, ...etc. A simple mechanical testing apparatus using off-the-shelf materials and open-source software for
M. Geasa
doaj   +1 more source

Unidirectional rotation of micromotors on water powered by pH-controlled disassembly of chiral molecular crystals

open access: yesNature Communications, 2023
Biological and synthetic molecular motors, fueled by various physical and chemical means, can perform asymmetric linear and rotary motions that are inherently related to their asymmetric shapes.
Itai Carmeli   +15 more
doaj   +1 more source

Temperature-Dependent Activity of Motor Proteins: Energetics and Their Implications for Collective Behavior

open access: yesFrontiers in Cell and Developmental Biology, 2021
Molecular motor proteins are an extremely important component of the cellular transport system that harness chemical energy derived from ATP hydrolysis to carry out directed mechanical motion inside the cells. Transport properties of these motors such as
Saumya Yadav, Ambarish Kunwar
doaj   +1 more source

A Rotary-Linear Ultrasonic Motor Using MnO2-Doped (Ba0.97Ca0.03)(Ti0.96Sn0.005Hf0.035)O3 Lead-Free Piezoelectric Ceramics with Improved Curie Temperature and Temperature Stability

open access: yesActuators, 2022
In this work, a cylindrical lead-free rotary-linear ultrasonic motor was attached to piezoelectric plates of MnO2-doped (Ba0.97Ca0.03)(Ti0.96Sn0.005Hf0.035)O3 ceramics using the first bending vibration to pull a thread output shaft of the interior of a ...
Cheng-Che Tsai   +3 more
doaj   +1 more source

A Novel Impact Rotary–Linear Motor Based on Decomposed Screw-Type Motion of Piezoelectric Actuator

open access: yesApplied Sciences, 2018
A novel impact two-degree-of-freedom (2-DOF) motor based on the decomposed screw-type motion of a piezoelectric actuator (PA) has been proposed. The fabricated prototype motor has a maximum diameter of 15 mm and a length of 100 mm which can produce a ...
Liling Han   +4 more
doaj   +1 more source

Linear tubular switched reluctance motor for heart assistance circulatory: Analytical and finite element modeling [PDF]

open access: yes, 2011
A linear tubular switched reluctance motor is presented. This actuator is devoted to be used as a left ventricular assist device (LVAD). In order to avoid thrombosis, this actuator includes pump and valve functions. By using a St. Jude Medical mechanical
Leprince, Pascal   +9 more
core   +1 more source

System-level efficiency optimization of a linear induction motor drive system

open access: yesCES Transactions on Electrical Machines and Systems, 2019
Linear induction motors are superior to rotary induction motors in direct drive systems because they can generate direct forward thrust force independent of mechanical transmission.
Wei Xu, Dong Hu, Gang Lei, Jianguo Zhu
doaj   +1 more source

Comparative Study between Two Schemes of Active-Control-Based Mechatronic Inerter

open access: yesMATEC Web of Conferences, 2017
Based on force-current analogy and velocity-voltage analogy in the theory of electromechanical analogy, the inerter is a device that corresponded to the capacitor completely where conquers the nature restriction of mass, what’s more, it is significant to
He Lingduo, Liu Yaozong, Han Silu
doaj   +1 more source

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