Location and coverage of enhanced self-sensing piezoelectric actuators for active-passive hybrid vibration control of beam structures

The loss factors of a simply supported beam with an enhanced active constrained layer damping treatment (EACL) are derived by the extended Hamilton principle and Rayleigh-Ritz method while open-loop and closed-loop control systems are considered. The vibration damping characteristics for the systems with partially covered active constrained layer damping and EACL treatments, are compared. The effects of location and coverage of the self-sensing piezoelectric actuators on the system performance are studied, considering active and passive actions. The results show that the location and coverage of the actuators have significant influence on system loss factors and the corresponding physical insights are discussed.