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Control strategies and experimental verifications of the electromagnetic mass damper system for structural vibration control

Zhang Chunwei¹ and Ou Jinping²

1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
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Abstract: The electromagnetic mass damper (EMD) control system, as an innovative active control system to reduce structural vibration, offers many advantages over traditional active mass driver/damper (AMD) control systems. In this paper, studies of several EMD control strategies and bench-scale shaking table tests of a two-story model structure are described. First, two structural models corresponding to uncontrolled and Zeroed cases are developed, and parameters of these models are validated through sinusoidal sweep tests to provide a basis for establishing an accurate mathematical model for further studies. Then, a simplified control strategy for the EMD system based on the pole assignment control algorithm is proposed. Moreover, ideal pole locations are derived and validated through a series of shaking table tests. Finally, three benchmark earthquake ground motions and sinusoidal sweep waves are imposed onto the structure to investigate the effectiveness and feasibility of using this type of innovative active control system for structural vibration control. In addition, the robustness of the EMD system is examined. The test results show that the EMD system is an effective and robust system for the control of structural vibrations.

Keywords: structural vibration control; electromagnetic mass damper (EMD) system; control strategy; shaking table test; pole assignment; control robustness