Title :
Control of seismically excited vibration using electrorheological materials and Lyapunov methods
Author_Institution :
Dept. of Civil & Environ. Eng., Duke Univ., Durham, NC, USA
fDate :
1/1/2001 12:00:00 AM
Abstract :
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
Keywords :
Lyapunov methods; bang-bang control; closed loop systems; control system synthesis; decentralised control; electrorheology; intelligent materials; structural engineering; vibration control; Lyapunov´s direct method; controllable stiffness; damping properties; decentralized bang-bang control law; electrorheological materials; ground accelerations; micromechanical simulations; rheometric measurements; seismically excited vibration; state-variable model; Acceleration; Bang-bang control; Circuit simulation; Circuit synthesis; Control system synthesis; Damping; Erbium; Micromechanical devices; Seismic measurements; Vibration control;
Journal_Title :
Control Systems Technology, IEEE Transactions on
