Results 41 to 50 of about 106,634 (300)

Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch

International Journal of Adaptive Control and Signal Processing, EarlyView.
This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane, Salama Makni, Mourad Kchaou, Ahmed El Hajjaji   +3 more
wiley   +1 more source

The modal damping ratio of a Single-Degree-of-Freedom (SDOF)

, 2023
Abstract Both NeXT and RDT techniques have their advantages and limitations, and the choice between them depends on the specific requirements and characteristics of the structural system being analyzed. It's recommended to consult relevant literature or seek guidance from experts to ensure accurate and reliable computation of the free-decay ...
openaire   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Identification of characteristic parameters of layered structures using modal parameters

Mechanical Engineering Journal
In this study, we present a method for determining parameters that are essential for evaluating the health of layered structures. This method uses modal parameters to identify characteristic parameters that can accurately reproduce the measured modal ...
Daiki TAJIRI, Shozo KAWAMURA
doaj   +1 more source

Estimation of Modal Damping Ratios from Mode Indicator Function.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C, 1997
The authors propose the utilization of a MIF (mode indicator function) to estimate modal damping ratios approximately. The accuracy and the effect of this method are examined to determine its feasibility for use in experimental modal parameter identification.
OKUMA, Masaaki, MOMOSE, Ryota
openaire   +2 more sources

Triple Junctions as Dislocation‐Like Defects: The Role of Grain Boundary Crystallography Revealed by Experiment and Atomistic Simulation

Advanced Engineering Materials, EarlyView.
Grain boundary triple junctions are an essential ingredient of the microstructure of polycrystalline materials. In this study, a triple junction is observed using atomic‐resolution scanning transmission electron microscopy and characterized. Computer simulations reveal that the junction has a dislocation character that is determined by the joining ...
Tobias Brink, Saba Saood, Peter Schweizer, Jörg Neugebauer, Gerhard Dehm   +4 more
wiley   +1 more source

Topology Optimization of Constrained Layer Damping on Plates Using Method of Moving Asymptote (MMA) Approach

Shock and Vibration, 2011
Damping treatments have been extensively used as a powerful means to damp out structural resonant vibrations. Usually, damping materials are fully covered on the surface of plates.
Zheng Ling, Xie Ronglu, Wang Yi, Adel El-Sabbagh   +3 more
doaj   +1 more source

Multi-mode piezoelectric shunt damping with residual mode correction by evaluation of modal charge and voltage

Journal of Intelligent Materials Systems and Structures, 2019
A resonant, piezoelectric shunt tuning procedure is based on the limiting eigenvalue problems associated with short and open circuiting of the piezoelectric domains attached to a vibrating structure. Whereas short circuit and open circuit frequencies are
J. Toftekær, J. Høgsberg
semanticscholar   +1 more source

New AI‐Assisted Approach for Expanding the Solution Space: Application to Lattice Structure Design

Advanced Engineering Materials, EarlyView.
This work introduces an innovative framework for designing structured materials by ex panding the design space through reparameterization of qualitative variables into continuous structural descriptors. Combined with machine‐learning‐based prediction and multi‐objective optimization, the approach enables the discovery of novel lattice architectures ...
G. H. Gahimbare, Y. Beideler, D. Chune, R. De Guio, T. Roland, H. Chibane   +5 more
wiley   +1 more source

Optimal layout of unconstrained damping material on a thin panel by using topology optimization

Nihon Kikai Gakkai ronbunshu, 2014
Damping material is usually applied on the steel panel of a vehicle to reduce vibration level. On the other hand, the weight reduction is also required to improve fuel consumption.
Takashi YAMAMOTO, Takayuki YAMADA, Kazuhiro IZUI, Shinji NISHIWAKI   +3 more
doaj   +1 more source