Simulation Study on the Hierarchical Decentralized Control of Structural Vibration

Because of the high dimensionality and multiple-input-multi-output nature of civil structure model, it is difficult to design a control strategy to achieve desired stability, robustness with centralized control method. Hierarchical decentralized control strategy is employed in this paper in response to this difficulty. In this approach, the structure to be controlled is divided into a set of substructures, and each substructure is then controlled independently using its local information. (finally a global coordinator will be used to coordinate among these local controllers) Harmonic controller eliminates interconnection of substructures. With LQR active control algorithm in Matlab environment,the centralized control strategy was implemented on cantilever structure under earthquake excitation. Simulated results show that hierarchical decentralized control method has a good control effect with preferably suppressed displacement response and less control force. The study in this paper presents a promising means for structural control.