Active Control Based on Prediction of Structural Vibration Feedback

Abstract

Faced with the problem of time-delay in the structural active control, the active control based on the output vector prediction in the structural vibration is proposed. Also, the thesis devises a plan of forecast active control, where the gray model GM(1,1) is used as the prediction model and the Matlab program is applied to the Computer Simulation Analysis. Adopting the plan in the aseismatic control of a 5-floor building and comparing the computation results with the control effect acquired from the references , numerical simulation results show that the gray forecast active control can lessen the time-delay effects on the structural vibration control which is superior to that in the references .

Seismic Resistance and Parametric Study of Building under Control of Impulsive Semi-Active Mass Damper

“…Unlike energy dissipation technology [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], a TMD needs to be installed on the higher floors of a building to provide a fine shock absorption effect. The weight of a mass damper is much less than that of the structure, and the available space for such an installation is limited.…”

Development of semi-active mass damper with impulsive reaction

“…Switch controller is applied to ''LOCK'' and ''UNLOCK'' between main structure and mass block of damper. These semi-active technologies such as accumulated semi-active hydraulic damper (ASHD) [15], magnetorheological (MR) fluid dampers, semi-active stiffness dampers, semi-active tuned liquid column dampers, and piezoelectric dampers [16,17], an improved displacement semi-active hydraulic damper (DSHD) [18] and the semi-active control law, based on the one step ahead prediction of the structural responses [19] compared to active control technology, such as the fourth-order Runge-Kutta method and instantaneous optimal control method are applied to the active control system [20] and the active control based on the output vector prediction [21], does not need large energy to operate equipment. This technology can reduce the active control risk of being unable to play seismic proof effect for power failure, induced by earthquake and strong typhoon or hurricane.…”