Structural Active Control Based on Eigenstructure Assignment and Its Simulations

The design of structural active control with minimum control effort was investigated.The aim is to design a state feedback controller,that the closed-loop system has desired eigenvalues,and a system performance function is optimized.By utilizing design degrees of freedom offered by parametric eigenstructure assignment,a parametric expression for the system performance index was proposed.Thus the optimization problem was changed into a minimization problem with some constraints and the optimized variables are a group of parameters.An algorithm was proposed for this minimization and utilized the original system data,and thus it is simple to use in applications.A three-story shearing model under earthquake excitation was analyzed by using the proposed algorithm and the simulation results show the effect of this algorithm.