Abstract Summary
This study presents a novel decentralized active control algorithm for vibration mitigation of structures subjected to seismic excitations. In recent years, the advancement in instrumentation schemes, i.e., sensors, actuators, and computing units is the reason behind the growing interest in the decentralized control approach as compared to the more complex and computationally extensive centralized architecture. In this study, the controller framework is designed through a suboptimal H2- based state-feedback control algorithm. The objective of this optimal strategy is to reduce the structural energy and control input energy simultaneously. Further, the concept of decentralized switched control law is included, and the detailed formulations are presented in digital domain. A set of communication channels are deliberated to trade the state information between the adjacent subcontrollers. The performance efficacy of the designed control strategy is numerically illustrated through an eight-story building model equipped with multiple active-controlled actuators. The building model with the same actuator arrangement is considered under the conventional centralized technique and uncontrolled conditions. Comparative assessment with uncontrolled and conventional centralized techniques confirms the better adaptiveness of the proposed control scheme.
