Active Control of Structures Under Stochastic Base Excitation with a Predominant Frequency

by Yoshikazu Yamada, Kyoto Univ, Japan,
Hirokazu Iemura, Kyoto Univ, Japan,
Akira Igarashi, Kyoto Univ, Japan,

Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract: Active control of structures under stochastic base excitation is investigated. The synthesis of an active control system discussed in the study is based on the use of stochastic control theory, where an energy-based stochastic criterion is employed for optimal control. As a result, an optimal control law for input with a predominant frequency is developed, which consists of a response feedback portion and a ground-input feedforward portion. The effectiveness of the control law is demonstrated with a numerical simulation, which shows that the proposed control law brings considerable control force (RMS) reduction, compared with the feedback control, when the two have the same level of response reduction.

Subject Headings: Stochastic processes | Control systems | Active control | Excitation (physics) | Numerical models | Structural systems | Professional societies

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