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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
- 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