THE ELECTRORHEOLOGICAL LONG-STROKE DAMPER: A NEW MODELLING TECHNIQUE WITH EXPERIMENTAL VALIDATION

✍ Scribed by N.D. SIMS; D.J. PEEL; R. STANWAY; A.R. JOHNSON; W.A. BULLOUGH

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 270 KB
• Volume: 229
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1999.2487

✦ Synopsis

Semi-active damping devices o!er improved performance over passive devices, without the power requirements or instability problems of fully active devices. Smart #uids (electrorheological and magnetorheological) are well suited to use in semi-active dampers*their #ow properties can be rapidly altered, with a lowpower requirement. However, the force/velocity response is highly non-linear, and this is without doubt hindering the development of e!ective control strategies. In this paper, the authors develop a new model 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 sti!ness term is based upon the #uid bulk modulus, and the mass is determined from the #uid density. The damping characteristic utilizes a modi"ed nondimensional Bingham Plastic function. The model predictions are compared with experimental results at a range of operating frequencies. Excellent agreement was achieved by updating the sti!ness and viscosity parameters using experimental data.