Papers Published

1. Gavin, Henri P., Control of seismically excited vibration using electrorheological materials and Lyapunov methods, IEEE Transactions on Control Systems Technology, vol. 9 no. 1 (2001), pp. 27 - 36 [87.896743] .
   (last updated on 2007/04/09)

   Abstract:
   This paper describes the use of electrorheologicai (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.

   Keywords:
   Lyapunov methods;Vibration control;Feedback control;Earthquake resistance;Frequency domain analysis;MOSFET devices;