A generalised method for the identification of the parameters which describe the dynamic properties of media between coupled substructures using measured FRFs is presented in this paper. The effort is mainly focused on the development of this generalised method and the improvement of its constituent algorithms. The method presented here is more general and more practical in some aspects when co...

V isual tracking of bare fingers allows more direct manipulation of digital objects, multiple simultaneous user interacting with their two hands, and permits the interaction on large surfaces, possibly in “unsafe” locations such as public spaces. The only required specific equipment is an affordable, off-the-shelf video camera. After reviewing the human-centered requirements for finger tracking...

Background: Acne vulgaris (AV) is a common disease that often results in disfiguring facial scarring that carries into adulthood. Here we report our experience with fractional radiofrequency (FRF) device in treatment of patients with acne and acne related scarring. Materials & Methods: We retrospectively reviewed the charts of all patients with acne scarring who completed a four treatment regim...

This paper discusses the implementation of a Structural Health Monitoring system for a FRP bridge structure using vibration-based monitoring techniques. The need to monitor the long-term performance of fiber reinforced polymer (FRP) composite bridge structures prompted the installation of a vibration-based structural health monitoring system on a recently-built FRP composite highway bridge in C...

Response predictions in structural dynamics are in general very sensitive to random uncertainties associated with the underlying predictive mathematical model. The non-parametric probabilistic model provides the possibility to capture both data and model uncertainties. The uncertainties are introduced at a global level and controlled through one dispersion parameter each, for the mass, damping ...

Due to the non-periodic nature of noise, the steady state response of a dynamic system to a periodic input is still subject to noise transients (noise leakage errors). For lightly damped systems these noise transients (significantly) increase the variance of frequency response function (FRF) measurements [1]. This paper presents a method for suppressing the noise transients in FRF measurements ...

In many engineering cases, uncertainties will exist on the frequency response functions (FRFs) of component models. Possible sources of uncertainty in the mechanical structure are uncertain material properties, loading conditions or geometry. When bringing together the component models together and interconnecting them into an assembly, it is of high interest to be able to predict the uncertain...

Lubrication is widely used to reduce wear of wheel and rail profiles by decreasing the friction between flange rail. The effects lubrication on dynamic response were investigated in this study, analysing responses adjoining bearing housing. experiments conducted a 1/3rd scale twin disc rig, with single disc, which can have various speeds, loads creepage. First, theoretical modal parameters calc...