Phononic crystals are materials or structures with periodic variations of elastic constants and density. Elastic waves in phononic crystals cannot propagate within a certain frequency range, called the band gap, due to the interference of their internal structure. This article investigates how fiber orientation affects the band gap properties of pe...
International audience
The study investigates the problem of decentralized semi-active control of free vibration. The control scheme is designed for implementation in a modular controller architecture, where a collection of subcontrollers is employed, with each subcontroller being associated with a subsystem that represents a component of the vibrating structure. Each su...
This paper introduces a new integrated Horizontal Bidirectional Hybrid Damping System (HBHDS) incorporating eddy current dampers, metallic yielding dampers, fuse-lock device with a spherical steel bearing, for controlling the longitudinal and transverse vibrations of long-span bridges under near-fault pulse-like earthquakes. Based on the nonlinear ...
Published in Journal of Physics: Conference Series
A viscoelastic damping layer attached to the plate structure can control vibrations but increases mass. Involving multiple viscoelastic materials, the contribution of different materials needs to be evaluated and allocated. In the paper, a topology optimization model is proposed to find distributions of different viscoelastic materials adopting a m...
Mitigating vibrations in engineering structures is of key interest, as they can lead to failure and/or discomfort. However, in some cases it is not feasible to actuate all the structure's degrees of freedom, which makes vibration mitigation difficult. In this work, we investigate the addition of a single one-degree-of-freedom virtual mechanical sys...
In this study an experimental program for verification of modal control algorithm for semi-active structures is proposed. The considered control approach assumes redirecting of mechanical energy between vibrational modes. The presented research is focused on development of an investigation method that would allow for demonstrating the control conce...
Abstract. Composite material parts are used more than ever in transportation applications dueto their lightweight and mechanical strength. In recent years, progresses in additive manufactur-ing processes have allowed not only to produce such materials more easily but also to integrateactive components inside the layers to create smart composite mat...
In this work, the problem of active vibration control of flexible mechanical structures is addressed through infinite and finite dimensional techniques. The compared approaches are adjusted for an output feedback controller based on delayed proportional actions,through a quasipolynomial-based approach, and an optimalH∞ controller design computed wi...
Published in ISA transactions
The operating process of rotary crane is often very complicated and there are many unpredictable conditions, such as the condition of the load sway around the hook, which will undoubtedly make the sway characteristics analysis of the system and the controller design become more difficult. In addition, for the purpose of decreasing the complexity of...
