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Controller optimization with constraints on probabilistic peak responses
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- Authors
- Issue Date
- 2004-03
- Publisher
- Techno Press
- Citation
- Structural Engineering and Mechanics, 17(3-4), 593-609
- Keywords
- stochastic ; process ; crossing rate ; failure probability ; optimization ; linear quadratic regulator
- Abstract
- Peak response is a more suitable index than mean response in the light of structural safety. In
this study, a controller optimization method is proposed to restrict peak responses of building structures
subject to earthquake excitations, which are modeled as partially stationary stochastic process. The
constraints are given with specified failure probabilities of peak responses. LQR is chosen to assure
stability in numerical process of optimization. Optimization problem is formulated with weightings on
controlled outputs as design variables and gradients of objective and constraint functions are derived. Full
state feedback controllers designed by the proposed method satisfy various design objectives and output
feedback controllers using LQG also yield similar results without significant performance deterioration.
- ISSN
- 1225-4568
- Language
- English
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