Results 71 to 80 of about 24,746 (168)

Vibration Attenuation of Cantilever Beam Using Electromagnetic Delayed Feedback

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study presents a combined analytical and numerical investigation of a single‐input single‐output delayed feedback controller designed to suppress vibrations in a cantilever beam actuated by an electromagnet positioned beneath its free end. An analytical model was developed using the linearized equation of motion for a transversely excited
Mohammad Alabdullah, Khaled Alhazza
wiley   +1 more source

Critical Velocity of High-Performance Yarn Transversely Impacted by Razor Blade

Fibers, 2018
A ballistic parameter that influences the ballistic performances of a high-performance yarn is the critical velocity. The critical velocity is defined as the projectile striking velocity that causes instantaneous rupture of the yarn upon impact.
Boon Him Lim, Jou-Mei Chu, Benjamin Claus, Yizhou Nie, Wayne Chen   +4 more
doaj   +1 more source

Tension-induced non-linearities of flexural modes in nanomechanical resonators

, 2013
We consider the tension-induced non-linearities of mechanical resonators, and derive the Hamiltonian of the flexural modes up to the fourth order in the position operators. This tension can be controlled by a nearby gate voltage.
Heikkilä, T. T., Khan, Raphaël, Massel, F.   +2 more
core   +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

Nonlinear poro thermal vibration and parametric excitation in a magneto-elastic embedded nanobeam using homotopy perturbation technique

Curved and Layered Structures
The primary focus of this study is to analyze the nonlinear vibration patterns and parametric excitation of embedded Euler–Bernoulli nanobeams subjected to thermo-magneto-mechanical loads.
Anitha Lakshmanan, Vadivukarasi Loganathan, Selvamani Rajendran, Dimitri Rossana, Tornabene Francesco   +4 more
doaj   +1 more source

Parameter estimation for the Euler-Bernoulli-beam [PDF]

An approximation involving cubic spline functions for parameter estimation problems in the Euler-Bernoulli-beam equation (phrased as an optimization problem with respect to the parameters) is described and convergence is proved.
Graif, E., Kunisch, K.
core   +1 more source

Logarithmic stability in determining two coefficients in a dissipative wave equation. Extensions to clamped Euler-Bernoulli beam and heat equations

, 2015
We are concerned with the inverse problem of determining both the potential and the damping coefficient in a dissipative wave equation from boundary measurements. We establish stability estimates of logarithmic type when the measurements are given by the
Ammari, Kaïs, Choulli, Mourad
core   +1 more source

Shaped electrodes for adaptive X‐ray optics

Journal of Synchrotron Radiation, EarlyView.
For adaptive X‐ray optics on high‐performance beamline optical systems, we describe an approach to mirror figure and slope control using patterned, shaped electrodes to control the local curvature on a lithium niobate substrate from a single applied voltage. Longitudinally continuous electrode patterns achieve target shapes without discontinuities, and
Kenneth A. Goldberg, Francesco Marzari, Grant D. Cutler   +2 more
wiley   +1 more source

Reduction of degrees of Freedom in three-dimensional ANCF beam of 24-DOF beam element by component mode synthesis

Nihon Kikai Gakkai ronbunshu, 2014
This paper describes how to reduce degrees of freedom for the absolute nodal coordinate formulation (ANCF) of three-dimensional beam made up of 24 degrees of freedom beam elements by applying the component mode synthesis. The stiffness matrix of the ANCF
Kosuke KADOKURA, Nobuyuki KOBAYASHI
doaj   +1 more source

Free Flexural Vibration of Multiple Stepped Beams by Spectral Element Method [PDF]

, 2014
The free vibration analyses of multiple-stepped Bernoulli-Euler beam with various boundary conditions have been studied by many researchers using different methods of analysis such as Differential Quadrature Element Method (DQEM), Composite Element ...
Meher, Jitendra Kumar
core