Improved bang-bang control for a new type of piezoelectric friction damper

Hong-Nan Li; Jun Li; Gangbing Song

doi:10.1117/12.597016

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16 May 2005 Improved bang-bang control for a new type of piezoelectric friction damper

Hong-Nan Li, Jun Li, Gangbing Song

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Proceedings Volume 5760, Smart Structures and Materials 2005: Damping and Isolation; (2005) https://doi.org/10.1117/12.597016
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

This paper presents a new design of piezoelectric friction damper, which consists of tube piezoceramic stack actuators, load cells, preload bolts, brass sheets, spring washers and slotted bolted connection. A semi-active control strategy for variable friction dampers based on an improved suboptimal Bang-Bang control algorithm presented in this paper is also developed. By using genetic algorithm, the amplitudes of the control and preloading friction forces in the control system are obtained for enhancing the seismic performance of the controlled structures. The proposed approach is applied to a three-story building with a variable friction damper installed in the first story. The numerical results indicate that more reduction of the peak accelerations under seismic excitations and a better adaptability can be achieved than those of the unmodified controller.

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Hong-Nan Li, Jun Li, and Gangbing Song "Improved bang-bang control for a new type of piezoelectric friction damper", Proc. SPIE 5760, Smart Structures and Materials 2005: Damping and Isolation, (16 May 2005); https://doi.org/10.1117/12.597016

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