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Wind and Structures
  Volume 2, Number 3, September 1999, pages 189-200

Non-spillover control design of tall buildings in modal space
J.Q. Fang, Q.S. Lit and D.K. Liu

    In this paper, a new algorithm for active control design of structures is proposed and investigated. The algorithm preserves the decoupling property of the modal vibration equation and eliminates the spillover problem, which is the main shortcoming in the independent modal space control (IMSC) algorithm. With linear quadratic regulator(LQR) control law, the analytical solution of algebraic Riccati equation and the optimal actuator control force are obtained, and the control design procedure is significantly simplified . A numerical example for the control design of a tall building subjected to wind loads demonstrates the effectiveness of the proposed algorithm in reducing the acceleration and displacement responses of tall buildings under wind actions.
Key Words
    structural control; tall buildings; wind-induced vibration
J.Q. Fang, Q.S. Lit and D.K. Liu:Department of Building and Construction, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong

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