A NEW APPROACH FOR INTEGRATING STRUCTURAL PARAMETERS IDENTIFICATION AND SEMI-ACTIVE VIBRATION CONTROL

摘要

Structural health monitoring and vibration control of civil engineering structures have been actively investigated but treated separately according to their individual primary objective pursued. It's highly desirable to explore efficient algorithms for conducting on line integrated structural health monitoring and vibration control. In this paper, a time domain algorithm is proposed for on-line integrated structural identification and vibration control under unknown excitation. Structural parameters are estimated based on the extended Kalman estimator. Structural optimal active control forces are determined by the linear quadratic Gaussian (LQG) control scheme based on estimated values of structural parameters. Then the structural semi-active control forces are provided by MR dampers. The unmeasured external excitations are estimated by the least-squares estimation approach. A numerical example of on-line integrated identification and vibration control of a multistorey shear building the building under unmeasured external excitation is studied to illustrate the performance of the proposed algorithm.