The Dynamics Research Group (DRG) based in the Department of Mechanical Engineering at the University ofSheffield conducts research into vibrations and the dynamics of structures. The main areas of research are:nonlinear dynamics, structural health monitoring, active and passive vibration control, smart materials andstructures and acoustics.In the field of nonlinear dynamics, th...

The paper aims to extract the dynamic properties of existing structures without utilizing the analytical models. The ambient vibration testing could be used on any type of frame such as concrete, steel and masonry to investigate the structural vulnerability. The method could be the first stage and necessarily for the retrofit process. To achieve this aim, the ambient vibration testing can...

This paper proposes a wavelet neurocontroller capable of self-adaptation and self-organization for uncertain systems controlled with semi-active devices, ideal candidates for control of large-scale civil structures. A condition on the sliding surface for cantilever-like structures is defined. The issue of applicability of the control solution to largescale civil structures is made the central t...

A comparative study of vibration and acoustic noise reductions via electronic switching controls for switched reluctance motor (SRM) is presented. First, studies concerning the acoustic noise and vibration sources, their effects and the existing mitigation approaches are given. Then five switching control approaches, which belong to the magnetic and electronic remedies, are proposed and applied...

Laboratory and manufacturing facilities are frequently located in areas that experience high-frequency (greater than 30 Hz) environmental vibration. Such vibrations are a concern for the proper functioning of sensitive laboratory devices, precision manufacturing equipment as well as human comfort. A simple method to accurately predict the magnitude of high-frequency floor vibrations would allow...