Most of the current research in the field of structural control for mitigation of responses due to environmental loads neglects the effects of control-structure interaction in the analysis and design of protective systems. The importance of including control-structure interaction when modeling a control system is discussed, and a specific model for hydraulic actuators typical of those used in many protective systems is developed. Experimental verification of this model is presented. Examples are given which employ seismically excited structures configured with both active bracing and active mass driver systems. These examples show that accounting for control-structure interaction and actuator dynamics is shown to significantly improve the performance and robustness of a protective system.
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