The electrorheological long-stroke damper: A new modelling technique with experimental validation

Citation
Nd. Sims et al., The electrorheological long-stroke damper: A new modelling technique with experimental validation, J SOUND VIB, 229(2), 2000, pp. 207-227
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF SOUND AND VIBRATION
ISSN journal
0022-460X → ACNP
Volume
229
Issue
2
Year of publication
2000
Pages
207 - 227
Database
ISI
SICI code
0022-460X(20000113)229:2<207:TELDAN>2.0.ZU;2-K
Abstract
Semi-active damping devices offer improved performance over passive devices , without the-power requirements or instability problems of fully active de vices. Smart fluids (electrorheological and magnetorheological) are well su ited to use in semi-active dampers-their flow properties can be rapidly alt ered, with a low-power requirement. However, the force/velocity response is :highly non-linear, and this is without doubt hindering the development of effective control strategies. In this paper, the authors develop a new mode l of an electrorheological damper. The key advantage of this model is that its algebraic form is suitable for use in control system design, whilst it is able to predict and explain observed behaviour. The model consists of a spring, mass, and damper connected. in series. The spring stiffness term is based upon the fluid bulk modulus, and:the mass is determined from the flu id density. The damping characteristic utilizes a-modified nondimensional B ingham Plastic function. The model predictions are compared with experiment al results at a range of operating frequencies. Excellent agreement was ach ieved by updating the stiffness and viscosity parameters using experimental data. (C) 2000 Academic Press.