Active self-healing mechanisms for discrete dynamic structures

SUMMARY In this paper, vibration database for damage growth monitoring and mitigation (active self-healing) in discrete structures operating with dynamic loads is considered. SHM in this context assumes a known damage location present in the structure and then determines its size at which it is present. The variations in the linear spring stiffness across the structure are considered as an indication of the damage growth. A transient response of the vibrating structure is assumed available to monitor the damage size using an extended Kalman filter algorithm. The growth of this damage is considered mitigated when the potential energy due to mode shapes that take tensile and compressive loads is minimized. These mode shapes are determined by a state feedback controller for which an actuator combination (more than one actuator) is assumed available. A linear spring–mass–damper system is considered to illustrate the active self-healing mechanisms presented in this paper. Copyright © 2013 John Wiley & Sons, Ltd.

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