Parametric identification of the Dahl model for large scale MR dampers

Abstract

SUMMARY Magnetorheological (MR) dampers are promising control devices in civil engineering structures as they combine reliability and stability of passive systems while maintaining versatility of active devices without large power requirements. These dampers are intrinsically nonlinear, so one of the challenging aspects of applying this technology is the development of accurate models to describe their behaviour for control design and evaluation purposes. This paper deals with the parametric identification of three large‐scale MR dampers which are modelled using the viscous + Dahl model. Experimental results show reasonably good agreement with the forces predicted by the identified models. Copyright © 2011 John Wiley & Sons, Ltd.

Using a limited set of MR dampers for improving structural seismic response

“…Aguirre et al . have demonstrated that the forces predicted using the viscous + Dahl model were in good agreement with experimental results. Xu et al .…”

“…Therefore, using them required the development of accurate models, allowing proper description of their behavior for control design and evaluation purposes. Aguirre et al [26] have demonstrated that the forces predicted using the viscous + Dahl model were in good agreement with experimental results. Xu et al [18] have reported that a modified sigmoid model accurately describes the behaviors of MR devices.…”

Posicast control of structures using MR dampers

“…In the parametric models, physical quantities such as viscosity and friction are utilized to determine the dynamic behaviour of the damper. Classical approaches of this kind include (i) the Bingham model [27], (ii) the Bouc-Wen model [18,28], (iii) the hyperbolic tangent model [29] and (iv) the Dahl friction model [30,31]. Nonparametric models utilize soft computing methods such as fuzzy logic and neural networks to describe the dynamic behaviour of the damper, typically on the basis of some experimental tuning.…”

Semi-active direct control method for seismic alleviation of structures using MR dampers

“…Furthermore, experimental works on parameter identification of MR dampers showed that the parameters α, k 0 , and c 0 are not always related to input current through linear equations as given in Eqs ()–(), but quadratic or cubic relations are better identified for large‐scale MR dampers . However, the nonlinear description of these parameters is also easily applicable for direct controller to find the optimal input voltage.…”