Abstract:

By combining linear quadratic optimal control and iterative learning control (ILC), a new hybrid control strategy named linear quadratic optimal iterative learning control is obtained. The optimal control force is determined according to quadratic performance function minimization in the process of ILC to reduce the earthquake displacement response of engineering structures. Effectiveness of the control is studied. The model of a typical seismically excited building in the second generation benchmark vibration control for buildings is studied using the new hybrid control strategy to calculate seismic displacement response of the building. Simulation results show that the new control strategy can effectively control earthquake displacement response with improved effectiveness.

Key words: engineering structures, seismic response, linear quadratic performance function, iterative learning, optimal control