objectives: this paper describes further improvement and preliminarily evaluation of a novel viscoelastic ankle-foot prosthesis prototype. the objective was to control the ankle hysteresis at slow and normal walking speeds. methods: inspired by the ankle biomechanics, in which the hysteresis differs based on the gait speeds, a manually damping control mechanism imbedded in the prosthesis for ad...

This paper presents the Fourier and wavelet characterization of vibratio...

The invention concerns a method to remotely measure the nodes’ quartz frequencies within a distributed system based on FlexRay. The proposed approach uses the clock correction mechanism and more especially the integrated damping factor, which slightly shifts the node’s internal clock correction term and its resulting time base. The invention was made by researchers of the Vienna University of T...

[1] Flexural modeling of Ithaca Chasma on Tethys suggests that the elastic thickness and the surface heat flux were 5–7 km and 18–30 mW/m respectively, when the feature formed ( 4 Gyr B.P.). Tidal heating is a plausible heat source, suggesting that Tethys’ eccentricity was higher in the past. Depending on Tethys’ internal structure, eccentricities in the range 0.001 to 0.02 are sufficient to ha...

A family of Boussinesq systems was proposed by J. L. Bona, M. Chen and J.-C. Saut to describe the two-way propagation of small amplitude gravity waves on the surface of water in a canal. Our work considers a class of these Boussinesq systems which couples two Benjamin-Bona-Mahony type equations posed on a bounded interval. We study the stabilization of the resulting system when a localized damp...

L. Dahil, Istanbul Arel University, Department of Mechanical and Metal Technologies, Turkey, A. Karabulut, Afyon Kocatepe University, Faculty of Technology, MechanicalEngineering, Turkey, S. Baspınar, Afyon Kocatepe University, Technical EducationFaculty, Turkey In this study,damping ratios of 3 samples made of aluminum foam material, which have diff erent-density pores, were calculated, the ef...

The theory of damping is discussed in Newton's Principia and has been tested in objects as diverse as the Foucault pendulum, the mirrors in gravitational-wave detectors and submicrometre mechanical resonators. In general, the damping observed in these systems can be described by a linear damping force. Advances in nanofabrication mean that it is now possible to explore damping in systems with o...

Damping limits the motions of an oscillator, which is a dynamic system. The selection of formulations for damping is discussed. If the forcing of the dynamic system contains terms that are proportional to the velocity of motion of the oscillator (drag-type forcing functions), these effects will additionally contribute to dampening the oscillations. Should the total damping under certain conditi...

The contribution of foundation damping to offshore wind turbines (OWTs) is not well known, though researchers have back-calculated foundation damping from “rotor-stop” tests after estimating aerodynamic, hydrodynamic, and structural damping with numerical models. Because design guidelines do not currently recommend methods for determining foundation damping, it is typically neglected. This pape...

The contribution of foundation damping to offshore wind turbines (OWTs) is not well known, though researchers have back-calculated foundation damping from “rotor-stop” tests after estimating aerodynamic, hydrodynamic, and structural damping with numerical models. Because design guidelines do not currently recommend methods for determining foundation damping, it is typically neglected. This pape...