Active Control of Along-Wind Response of a Tall Building with AMD Using LQR Controller

Abstract:

Most of modern tall buildings using lighter construction materials are more flexible so could be excessive wind-induced vibrations resulting in occupant discomfort and structural unsafety. The optimal control technique for reducing along-wind vibration of a tall building based on the linear quadratic regulator (LQR) is presented in this work. Actively controlled reduced along-wind vibration response is obtained from the tall building installed in an active mass damper (AMD) with a LQR controller. Fluctuating along-wind load is generated using numerical simulation method, which can formulate a stationary Gaussian white noise process. Simulating wind load in the time domain using known spectra data of fluctuating along-wind load is particularly useful for estimation of windinduced vibration which is more or less narrow banded process such as a along-wind response of a tall building. In this work, fluctuating along-wind load acting on a tall building treated as a stationary Gaussian white noise process is simulated numerically using the along-wind load spectra proposed by G. Solari in1992. And using this simulated along-wind load estimated the reduced along-wind vibration response of a tall building installed in an AMD with a LQR controller.

• Periodical: Applied Mechanics and Materials (Volumes 490-491)
• Pages: 1063-1067
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.490-491.1063
• Online since: January 2014
• Authors: Young Moon Kim, Ki Pyo You, Jang Youl You
• Keywords: Along-Wind Response, AMD, LQR, Numerical Simulation

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