Date of Award

2014

Document Type

Thesis

Degree Name

Master of Science in Mechanical Engineering (MSME)

Department

Mechanical Engineering

First Advisor

Yi, Sun

Abstract

Annually, our world experiences thousands of seismic events that are the cause of hundreds of structural disasters and human fatalities. The objective of the presented research is to contribute to the world’s social, economic, and environmental needs by designing an optimized feedback control for active mass dampers (AMDs) by reducing oscillations. The optimal design will meet the required specifications and maintain a structure’s quasi-ideal, static position throughout a seismic event. The system’s equation of motion (EOM) is derived by using the Lagrangian Method and the free-body diagram. All the simulated and experimental responses of the AMD-1 system are obtained using MATLAB and Simulink. The experimental data is collected from various tests performed on a single-story building model. The techniques utilized for improvement of the AMD’s feedback control include parameter estimation, eigenvalue assignment, and linear quadratic regulation (LQR). As success is achieved with the AMD feedback control, future research can focus on idealizing the AMD’s performance in a system with multiple degrees of freedom.

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