Results 11 to 20 of about 212,264 (315)

Performance Dependence on Initial Free-End Levitation of a Magnetically Levitated Piezoelectric Vibration Energy Harvester With a Composite Cantilever Beam

open access: yesIEEE Access, 2017
Vibration energy harvesting by using piezoelectric materials provides a promising alternative solution for a wide range of self-powered systems. In this paper, performance dependence on initial freeend levitation position (IFLP) of a magnetically ...
Zhonghua Zhang   +5 more
doaj   +1 more source

A Dual-Chamber Serial–Parallel Piezoelectric Pump with an Integrated Sensor for Flow Rate Measurement

open access: yesSensors, 2019
A new concept of a dual-chamber serial-parallel piezoelectric pump with an integrated sensor (DSPPIS) is presented in this paper. By means of dividing a piezoelectric bimorph into an actuator and a sensor, sensing function is integrated onto the DSPPIS ...
Song Chen   +6 more
doaj   +1 more source

3D-Printed Soft Structure of Polyurethane and Magnetorheological Fluid: A Proof-of-Concept Investigation of its Stiffness Tunability

open access: yesMicromachines, 2019
In this study, a soft structure with its stiffness tunable by an external field is proposed. The proposed soft beam structure consists of a skin structure with channels filled with a magnetorheological fluid (MRF). Two specimens of the soft structure are
Seong-Woo Hong   +7 more
doaj   +1 more source

An Air Velocity Monitor for Coal Mine Ventilation Based on Vortex-Induced Triboelectric Nanogenerator

open access: yesSensors, 2022
Air velocity of coal mine ventilation is an important consideration that may cause serious damage. This paper proposes a simple, low cost and effective air velocity monitor (AVM) for coal mine ventilation.
Guocheng Shen   +5 more
doaj   +1 more source

A Novel Linear Walking Type Piezoelectric Actuator Based on the Parasitic Motion of Flexure Mechanisms

open access: yesIEEE Access, 2019
A walking-type piezoelectric actuator based on the parasitic motion of flexure mechanisms is proposed in this paper. With the help of the parasitic motion of the asymmetrical flexure mechanism, the conventional walking-type piezoelectric actuator with ...
Jianming Wen   +5 more
doaj   +1 more source

Discovering the evolution of urban structure using smart card data: The case of London [PDF]

open access: yes, 2021
Cities are continuing to develop and are grappling with uncertainties and difficulties as they do so. It has therefore become essential to understand how urban spatial structure changes, particularly with the increasingly available sources of ‘big data’.
Chen, H.   +4 more
core   +1 more source

Bending vibration control of a MR fluid embedded smart beam exposed by the conjunction of wind-induced galloping effects

open access: yes, 2020
This study examined the control performance of a multi-layer smart beam structure in which the middle layer was partially filled with magnetorheological (MR) fluid.
Sivrioğlu, Selim, Bolat, Fevzi Çakmak
core   +1 more source

Design and Experimental Performance of a Novel Piezoelectric Inertial Actuator for Magnetorheological Fluid Control Using Permanent Magnet

open access: yesIEEE Access, 2019
A piezoelectric inertial actuator for magnetorheological fluid (MRF) control using permanent magnet is proposed in this paper. The stable linear motion of the actuator with high controllability is obtained by integrating the piezoelectric vibrator and ...
Renming Wang   +5 more
doaj   +1 more source

Vibration Diagnosis of Sand Units in a Stone Crusher Plant: An On-Site Field Test

open access: yesApplied Sciences, 2020
Due to the shortage of natural sand from rivers and seas, artificial sand production from large stones or rocks is being increased. However, this sand manufacturing process is dangerous and causes several social problems such as a high level of unwanted ...
Seong-Hwan Kim   +5 more
doaj   +1 more source

Advances in Smart Materials and Structures

open access: yesMaterials, 2023
Smart materials and structures are capable of active or passive changes in terms of shapes (geometries), properties, and mechanical or electromagnetic responses, in reaction to an external stimulus, such as light, temperature, stress, moisture, and electric or magnetic fields [...]
Bing Wang, Tung Lik Lee, Yang Qin
openaire   +2 more sources

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