Results 51 to 60 of about 3,470,000 (296)

Mechanics of Telson Ridges in Mantis Shrimp for Impact Analysis and Implications for Bioinspired Elastic Shell Designs

Advanced Functional Materials, EarlyView.
The mantis shrimp telson reveals how ridged biological shields control deformation under impact. Inspired by this architecture, telson‐inspired ridged curved shells transform ridge geometry and macroscopic curvature into bidirectional snap‐through, tunable stiffness, and enhanced hysteretic energy dissipation for multifunctional architected materials ...
Phani Saketh Dasika, Adwait Trikanad, Wei Huang, Taige Hao, David Kisailus, Pablo D. Zavattieri   +5 more
wiley   +1 more source

A weighted damping strategy for improving the adaptability of converter to weak grid

Diance yu yibiao
Active damping can significantly improve the adaptability of converter to weak grid, however, when the PCC (point of common coupling) voltage harmonics are used for active damping control, the suppression ability of the system on the background harmonic ...
XU Jia, YANG Shude, ZHANG Xinwen
doaj   +1 more source

Molecularly Dissipative Liquid Crystal Elastomer Foams for Impact and Vibration Attenuation

Advanced Functional Materials, EarlyView.
Liquid crystal elastomer foams integrate cellular deformation with mesogen reorientation to create a dual‐scale energy dissipation mechanism. Progressive pore collapse absorbs mechanical loads, while stress‐induced mesogen reorientation provides additional damping, resulting in reduced impact transmission and broadband suppression of vibrational ...
Subi Choi, Sangyeop Lee, In‐sun Jeong, Kyungjun Song, Eugene M. Terentjev, Suk‐kyun Ahn   +5 more
wiley   +1 more source

Critical Coupling in Semi‐Trasparent Fano Resonators for Photothermal Converters

Advanced Functional Materials, EarlyView.
An ultrathin metal–insulator multilayer architecture is engineered to exploit Fano‐resonant critical coupling, completely suppressing optical reflectance while achieving a balanced 50:50 trade‐off between absorbance and transmittance. Upon laser excitation at resonance, the metamaterial generates intense localized heat (ΔT≈550∘C$\Delta T {\approx }550^\
Giuseppe Emanuele Lio, Giuseppe Nicoletta, Roberto Caputo, Antonio Ferraro   +3 more
wiley   +1 more source

Semi-Active Damping of Mechanical Vibrating Systems Using Variable Stiffness Actuator

Al-Khawarizmi Engineering Journal, 2018
In this research, a variable stiffness actuator is proposed to enhance the damping of the mechanical vibrating system. The frequency response analysis of the vibrating system is dependant in order to analyze and synthesis this semi-active damping, where ...
Yarub Omer Naji Al-Azzawi
doaj  

Damping characteristic analysis of grid-forming PMSG-based WT under different power oscillation damping controls

International Journal of Electrical Power & Energy Systems
In this paper, the damping characteristics of the grid-forming permanent magnet synchronous generator (PMSG)-based wind turbine (WT) under different damping controls are investigated considering energy efficiency.
Xiaotian Yuan, Zhengchun Du, Yujun Li, Tong Qu, Han Jiang   +4 more
doaj   +1 more source

Wide frequency range active damping of LCL-filtered grid-connected converters

The Journal of Engineering, 2019
It can be challenging to guarantee the stability of grids with many converters with LCL filters connected due to the presence of multiple resonances within the system. This paper presents an active damping technique to mitigate multiple resonance effects
Abdelhady Ghanem, Mohamed Rashed, Mohamed Rashed, Mark Sumner, Mohamed Adel El-sayes, Ibrahim. I. I. Mansy   +5 more
doaj   +1 more source

A Miniaturized Autonomous Thermomagnetic Generator

Advanced Functional Materials, EarlyView.
Micro, autonomous and high power thermomagnetic generator operating between a heat dissipator and a processor. ABSTRACT Thermomagnetic generators (TMG) are promising devices for converting low‐grade waste heat into electricity. Self‐actuation using permanent magnets is the key to autonomy.
Morgan Almanza, Doan Nguyen Ba, Nesrine Belkadi, Erika Fontana, Jean‐Eudes Duvauchelle, Sukhendu Sadhukhan, Loïc Becerra, Thibaut Devillers, Massimiliano Marangolo, Fabien Parrain, Nora M. Dempsey, Martino LoBue   +11 more
wiley   +1 more source

Optimal design of structures with active constrained layer damping

, 1995
A piezoelectric element and a constrained layer damping element are combined to allow for an active constrained layer damping treatment. The development of these elements are reviewed and results are compared with the literature to insure that the ...
Veley, Duane, Rao, S
core   +2 more sources

Active damping of the 1D rocking mode [PDF]

, 2010
Active damping of a rotational vibration mode in the linear guidance of a precision machine in a one dimensional (1D) setting is considered in this paper. This so-called rocking mode presents itself in machines having linear actuation.
de Vries, Theo J.A., Bayan Babakhani, Theo J. A. de Vries, Babakhani, Bayan   +3 more
core   +1 more source