Control of seismically excited vibration using electrorheological materials and Lyapunov methods
Gavin HP
IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY
9 (1): 27-36 JAN 2001


Abstract:
This paper describes the use of electrorheological (ER) materials in a vibration control system designed to suppress earthquake-excited vibrations. A state-variable model for the ER device is based on micromechanical simulations and rheometric measurements of ER materials. A decentralized bang-bang control law is synthesized using Lyapunov's direct method and is implemented using analog circuitry. The behavior of the closed-loop system is illustrated on a small scale (1:15) building model driven by ground accelerations. The combined effects and relative importance of the controllable stiffness and damping properties of ER materials are examined.

Author Keywords:
adaptive control, analog circuits, earthquakes, EHV measurements, feedback circuits, frequency domain analysis, MOSFET switches, nonlinear systems, velocity measurement

KeyWords Plus:
PHENOMENOLOGICAL MODEL, VISCOELASTIC RESPONSE, OSCILLATORY SHEAR, ER-FLUID, DAMPERS, SUSPENSIONS, DESIGN, PROTECTION, DEPENDENCE, MECHANISMS

Addresses:
Gavin HP, Duke Univ, Dept Civil & Environm Engn, Durham, NC 27708 USA
Duke Univ, Dept Civil & Environm Engn, Durham, NC 27708 USA

Publisher:
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, NEW YORK

IDS Number:
396GG

ISSN:
1063-6536