The traditional magnetorheological (MR) damper subject to the limited space has shortcomings such as small damping force, narrow dynamic range and low adaptability. In this study, a new MR with folded resistance gaps bending magnetic circuit was proposed for improving performance. length of gap increased by configuring multi-stage annular structure, established activate non-flux region. mathema...

The vibration control of a seat suspension system with magnetorheological (MR) damper is investigated in this study. Firstly, a dynamical model of the seat suspension system with parameter uncertainties (such as mass, stiffness, damping) and actuator saturation is established. Secondly, based on Lyapunov functional theory and considering constraint conditions for damping force, the semi-active ...

Magneto-rheological damper (MR damper) has been expected to control the response of civil and building structures in recent years, because of its large force capacity and controllable force characteristics. Recent study is to the application of controllable dampers for reducing earthquake response of buildings and/or wind induced sway. The dynamic characteristics of the MR damper have to be cla...

This paper presents an implementation of a nonlinear optimal-based wind turbine tower vibration control method. An NREL 5.0 MW tower-nacelle model equipped with hybrid tuned absorber (HTVA) is analysed against the magnetorheological TVA (MRTVA). For purposes, 3 kN active actuator in parallel passive used HTVA system, while MR damper built MRTVA instead viscous damper, as standard TVA. All force...

Eccentric structures will have torsional vibrations subjected to earthquakes, which can accelerate the damage of structures, and even become main cause building collapse. Semi-active control systems equipped with multiple magnetorheological (MR) dampers been widely applied in structural vibration control. In this study, numerical models spatial eccentric MR were established, time history analys...

In order to build high-precision and highefficient MR damper system model, a multi-domain unified modeling method was proposed. Firstly, based on the analysis of a MR damper semi-active suspension system model, various fields of MR, such as structure, magnetic field, control and mechanics, were studied to find the main influencing parameters. And then for the multi-domain coupling characteristi...

Magnetorheological (MR) dampers are controlled energy-dissipating devices utilizing smart fluids. They operate in a fast and valveless manner by taking advantage of the rheological properties MR The magnitude response fluids, when subjected to magnetic fields, is sufficient employ them various applications, namely, vibration damping, energy absorption, exoskeletons, etc. At same time, predictin...

This paper explores the design methodology and effectiveness of small-scale magnetorheological dampers (MRDs) in applications that require rapidly variable damping. Previously applications of MRDs have been chiefly limited to vehicle shock absorbers and seismic vibration attenuators. There has been recent biomedical interest in active-damping technology, particularly in the field of rehabilitat...

To analyze the multi-dimensional seismic mitigation performance and torsional vibration characteristic of an L-shaped frame structure with a magnetorheological damper (MRD). Firstly, mechanical property MRD is experimentally studied. Then, calculation models without MRDs are found through theoretical analysis, programs compiled. Finally, time history responses calculated during excitation bi-di...

Magnetorheological (MR) dampers have received special attention as semi-active devices for mitigation of structural vibrations. Because of the inherent nonlinearity of these devices, it is difficult to obtain a reasonable mathematical inverse model. This paper is concerned with two related concepts. On one hand, it presents a new inverse model of MR dampers based on the normalized Bouc–Wen mode...