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Virginia Tech architecture professor,students reduce structural vibrations with simple,groundbreaking device
Virginia Tech architecture professor students reduce structural vibrations with simple groundbreaking device
2017/2/16
A revolutionary portable device invented by Virginia Tech architecture professor Mehdi Setareh with help from students promises to make structural vibration-reducing technology uni...
Lecture Notes on Nonlinear Vibrations.
Using delay to quench undesirable vibrations
Differential-delay equations Hopf bifurcation Perturbation methods
2015/8/27
A van der Pol type system with delayed feedback is explored by employing the two vari-able expansion perturbation method. The perturbation scheme is based on choosinga criticalvalue for the de-lay cor...
Lecture Notes on Nonlinear Vibrations.
Vortex-Induced Vibrations of an Inclined Cylinder in Flow
Vortex-Induced Vibrations Inclined Cylinder Flow
2014/10/23
When a bluff body is placed in flow, vortices are shed downstream of the body. For the case of a bluff body with a circular cross-section (a cylinder) attached to a spring and a damper, when the frequ...
VIBRATIONS OF A GYROCOPTER – AN ANALYSIS USING IMUS
Aerial Analysis IMU Platforms Test Imagery
2014/4/25
As a part of a research project on the development of a low-cost sensor system for use on gyrocopters several investigations on the recording of aerial image blocks have been carried out during the la...
Design of piezoelectric energy harvesting devices subjected to broadband random vibrations by applying topology optimization
Topology optimization Energy harvesting Piezoelectric material
2012/2/29
Converting ambient vibration energy into electrical energy by using piezoelectric energy harvester has attracted a lot of interest in the past few years. In this paper, a topology optimization based m...
Reduction of Fast SOP Changes in DSCMs under Influence of Shock and Vibrations
Fibers single-mode Polarization
2015/6/10
Fast SOP changes in fiber-based dispersion slope compensating modules (DSCMs) due to mechanical impact are effectively suppressed by introducing a simple passive vibration-suppression scheme consistin...
The Trans-Alaska Pipeline System, which traverses hundreds of miles of some of the most inhospitable terrain on Earth, must be monitored almost constantly for potential problems like corrosion or crac...
Longitudinal vibrations of mechanical systems with the transportation effect
Applied mechanics Longitudinal vibrations Multibody systems
2009/12/14
Purpose: this thesis purpose is a new way of modelling systems working with high speeds of mechanisms. Systems are analyzed with taking into consideration the rotational movement and with criterions o...
Reverse task of passive and active mechanical system in torsional vibrations
Process systems design Polar graphs Structural numbers
2009/12/14
Purpose: The main aim of this paper is to develop a method for finding structure and parameters, i.e. a structural and parameter synthesis, of an active model of a viscous damper mechanical system in ...
Transverse Vibrations of Rotating Prismatic Beams Produced by Variable-materials
Transverse vibration Natural frequency Variable material Rotating beam
2009/10/13
In this study, transverse vibrations of rotating prismatic beams based on variable materials are investigated.Natural frequencies are obtained by the Rayleigh-Ritz method. These results are compared w...
Fuzzy Logic Control of Vibrations of Analytical Multi-Degree-of- Freedom Structural Systems
Fuzzy logic control PD control Multi-degree-of-freedom structure Earthquake-induced vibratio
2009/10/12
A fuzzy-logic-based controller and a PD controller are designed for an active control device considering a multi-degree-of-freedom analytical structure against earthquakes. The advantage of the fuzzy ...
Analysis of Viaduct Road Vibrations Using Cluster Filtering and Actuation
Distributed-parameter structures Spillover e ect Cluster fltering and actuation
2009/10/12
An infinite number of modes of distributed-parameter structures cause spillover destabilization creating problems in controlling vibrations. This paper introduces cluster filtering and actuation in th...
Active Control of Seat Vibrations of a Vehicle Model Using Various Suspension Alternatives
PID control Vehicle model Active suspensions
2009/10/12
The dynamic behavior of a non-linear 8 degrees of freedom vehicle model having active suspensions and a PID controlled passenger seat is examined. The non-linearity occurs due to dry friction on the d...