Results 131 to 140 of about 7,662 (250)

Piezoelectric devices for vibration suppression: Modeling and application to a truss structure [PDF]

For a space structure assembled from truss members, an effective way to control the structure may be to replace the regular truss elements by active members. The active members play the role of load carrying elements as well as actuators.
Belvin, W. Keith, Sparks, Dean W., Jr., Sulla, Jeff L., Won, Chin C.   +3 more
core   +1 more source

Actuation Strategies for Underwater Jet‐Propelled Soft Robots

Journal of Field Robotics, EarlyView.
ABSTRACT This review article examines jet‐propulsion mechanisms in underwater soft robotic systems, focusing exclusively on physically fabricated and experimentally validated robots. Covering research published from 2013 to 2025, this study classifies and evaluates jet‐propulsion robots based on their actuation mechanisms.
Angel Kitone, Mohammed Anteet, Pawandeep S. Matharu, Yara Almubarak   +3 more
wiley   +1 more source

Exploring the Use and Impact of Composite Materials in Robotics: A Systematic Review

Journal of Field Robotics, EarlyView.
ABSTRACT Lightweight and high‐strength materials are important in robotics, as structural design impacts efficiency, payload capacity, and energy consumption. Composite materials, with their superior stiffness‐to‐weight ratios and multifunctional properties, offer clear advantages over conventional metals and polymers.
Doglas Negri, Gabriela Wessling Oening, Felipe Augusto Carvalho de Faria, Sarah Maria Schroeder, Ricardo De Medeiros   +4 more
wiley   +1 more source

Direct evidence for electrostriction‐enhanced piezoelectricity in poly(vinylidene fluoride‐co‐trifluoroethylene) random copolymers

Responsive Materials, EarlyView.
Direct experimental evidence for electrostriction‐enhanced piezoelectricity is obtained for a quenched‐stretched‐annealed‐poled P(VDF‐TrFE) 52/48 mol.% random copolymer using time‐resolved small‐angle X‐ray scattering and wide‐angle X‐ray diffraction. Upon stretching up to 6% strain, the crystallinity (xc) increases 10% at the expense of the contents ...
Zhiwen Zhu, Guanchun Rui, Siyu Wu, Honghu Zhang, Ruipeng Li, Lei Zhu   +5 more
wiley   +1 more source

Piezoelectrically Actuated Microvalve for Liquid Effluents [PDF]

Modifications have been proposed to effect further improvement of the device described in Improved Piezoelectrically Actuated Microvalve (NPO-30158), NASA Tech Briefs, Vol. 26, No. 1 (January 2002), page 29.
Yang, Eui-Hyeok
core   +1 more source

Efficient Harvesting of Irregular and Low‐Frequency Mechanical Energy via Hybridized Electromagnetic‐Triboelectric Systems

Small, EarlyView.
ABSTRACT The rapid expansion of the Internet of Things (IoT) and wearable electronics necessitates sustainable power sources to replace the limited electrochemical battery. While mechanical energy harvesting offers a promising solution, traditional harvesters face challenges of irregular and low−frequency environmental sources. This review presents the
Yongbin Han, Ju‐Hyuck Lee, Hong‐Joon Yoon   +2 more
wiley   +1 more source

Active micro-vibration isolation system for adaptive vibration suppression tests using piezoelectric stack actuator

Journal of Low Frequency Noise, Vibration and Active Control
An active micro-vibration isolation system for adaptive vibration suppression using piezoelectric stack actuators is presented, along with the discrete time modelling method, real-time adaptive controller design, and hardware implementation.
Zhiyuan Gao, Lei Zhang, Tongxin Xu, Xiaojin Zhu   +3 more
doaj   +1 more source

Filling a Gap in Materials Mechanics: Nanoindentation at High Constant Strain Rates up to 105 s−1

Small, EarlyView.
A piezoelectric nanoindentation platform enables constant strain‐rate testing up to 105 s−1, extending experimental capabilities to extreme deformation regimes. Distinct hardness upturns are revealed across crystalline and amorphous materials, verified as intrinsic responses through quasi‐static reloading.
Lalith Kumar Bhaskar, Dipali Sonawane, Hendrik Holz, Jeongin Paeng, Peter Schweizer, Jing Rao, Bárbara Bellón, Damian Frey, Aloshious Lambai, Laszlo Pethö, Johann Michler, Jakob Schwiedrzik, Gaurav Mohanty, Gerhard Dehm, Rajaprakash Ramachandramoorthy   +14 more
wiley   +1 more source

Tribo‐Electromagnetic Nanogenerator Based on Microstructured Polyvinyl Chloride Layer for Enhanced Hybrid Energy Harvesting and Intelligent Health Monitoring

Small, EarlyView.
A microstructured PVC‐based tribo‐electromagnetic nanogenerator (TEMNG) enables simultaneous harvesting of biomechanical and ambient electromagnetic energy. The hybrid device achieves high electrical outputs while supporting wearable sensing, gait monitoring, and self‐powered touch interfaces.
Ching‐Te Kuo, Kai‐Che Lai, Zhen‐Xiang Liang, Meng‐Chian Wu, Chien‐Chin Chen   +4 more
wiley   +1 more source

High‐Power Performance of Textured Piezoelectric Ceramics Through Synergistic A‐Site Donor and B‐Site Acceptor Doping

Small Methods, EarlyView.
A/B‐site co‐doping combined with templated grain growth enables synergistic defect and domain engineering in textured PIN–PMN–PT ceramics. The approach simultaneously enhances piezoelectric response and mechanical quality factor, achieving a balanced soft–hard characteristic.
Minwoo Kim, Dong‐Gyu Lee, Il‐Ryeol Yoo, Byeong‐Jae Min, Ye Rok Choi, Hyun Soo Kim, Sunghoon Hur, Heemin Kang, Sahn Nahm, Jungho Ryu, Yongke Yan, Jeong Min Baik, Kyung‐Hoon Cho, Hyun‐Cheol Song   +13 more
wiley   +1 more source