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Structural Engineering and Mechanics Volume 25, Number 5, March30 2007 , pages 541-564 DOI: https://doi.org/10.12989/sem.2007.25.5.541 |
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Energy balance and power demand assessment of actuators in base isolated structures supplemented with modified bang-bang control |
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Robert R. Sebastianelli, Jr. and Mark A. Austin
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| Abstract | ||
| This paper investigates the feasibility of supplementing base isolation with active bang-bang control mechanisms. We formulate discrete approximations to energy-balance and power-demand equations for a base isolated structure supplemented with constant stiffness bang-bang (CKBB) control. Numerical experiments are conducted to: (1) Identify situations when constant stiffness bang-bang control is most likely to \"add value\" to system responses due to base isolation alone, and (2) Quantitatively determine the work done and power required by the actuators. A key observation from the numerical experiments is that \"overall performance\" of the actuators is coupled to \"input energy per unit time.\" | ||
| Key Words | ||
| base isolation; bang-bang control; energy-based design. | ||
| Address | ||
| Dept. of Civil and Environmental Engineering, and Institute for Systems Research,University of Maryland, College Park, MD 20742, USA | ||