Optimal semiactive control of structures with isolated base

U. Aldemir; H. P. Gavin

doi:10.1007/s10778-006-0082-3

Optimal semiactive control of structures with isolated base

U. Aldemir^*, H. P. Gavin

^*Corresponding author for this work

Department of Civil Engineering

Duke University

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The paper investigates the benefits of implementing the semiactive control systems in relation to passive viscous damping in the context of seismically isolated structures. Frequency response functions are compiled from the computed time history response to pulse-like seismic excitation. A simple semiactive control policy is evaluated in regard to passive linear viscous damping and an optimal non-causal semiactive control strategy. The optimal control strategy minimizes the integral of the squared absolute accelerations subject to the constraint that the nonlinear equations of motion are satisfied. The optimization procedure involves a numerical solution to the Euler-Lagrange equations.

Original language	English
Pages (from-to)	235-240
Number of pages	6
Journal	International Applied Mechanics
Volume	42
Issue number	2
DOIs	https://doi.org/10.1007/s10778-006-0082-3
Publication status	Published - Feb 2006

Keywords

Euler-Lagrange equations
Nonlinear systems
Optimal control

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10.1007/s10778-006-0082-3

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AB - The paper investigates the benefits of implementing the semiactive control systems in relation to passive viscous damping in the context of seismically isolated structures. Frequency response functions are compiled from the computed time history response to pulse-like seismic excitation. A simple semiactive control policy is evaluated in regard to passive linear viscous damping and an optimal non-causal semiactive control strategy. The optimal control strategy minimizes the integral of the squared absolute accelerations subject to the constraint that the nonlinear equations of motion are satisfied. The optimization procedure involves a numerical solution to the Euler-Lagrange equations.

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KW - Nonlinear systems

KW - Optimal control

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Optimal semiactive control of structures with isolated base

Abstract

Keywords

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