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Optimum Design Strategy for H∞ Control of Time-Delayed Direct Velocity Feedback Systems

Optimum Design Strategy for H∞ Control of Time-Delayed Direct Velocity Feedback Systems

Authors :
Chang-Ching Chang
Chi-Chang Lin
Source :
Journal of Engineering Mechanics. 139:1460-1469
Publication Year :
2013
Publisher :
American Society of Civil Engineers (ASCE), 2013.

Abstract

In this paper, an optimal H∞ control algorithm using direct velocity feedback is used for the design of control systems in reducing structural seismic responses. An optimum design strategy was developed for deciding two control parameters, γ and α, which are introduced in the control algorithm and play important roles in system stability and control performance. γ is a positive attenuation constant, which denotes a measure of control performance, and α is a control weighting factor, indicating the relative significance between control force requirement and response reduction. Analytical results show that decreases in γ or increases in α yield better control performance but require larger control forces. The selection range of γ and α for a controlled system yielding overdamped or unstable responses is found. To assure system stability and better performance than linear quadratic regulator (LQR) control, analytical expressions of the upper and lower bounds of γ and α are derived for direct velocity...

Details

ISSN :
19437889 and 07339399
Volume :
139
Database :
OpenAIRE
Journal :
Journal of Engineering Mechanics
Accession number :
edsair.doi...........1892c4918aa14d18a0016d6fcd370028
Full Text :
https://doi.org/10.1061/(asce)em.1943-7889.0000590