Mechanism on energy transmission control in beams based on a piezoelectric transducer

In a beam-like structure, which acts as a vibration transmission path, transmitted energy can be effectively suppressed by employing an active force. The energy transmission control can also be achieved at a certain frequency band without external energy by attaching a mechanical system, which may be composed with piezoelectric transducers, on the beam. A mass-spring attachment is modeled to investigate the relationship between the mechanical impedance and the working frequency. Then, the relationship between the working bandwidth and circuit parameters of the piezoelectric transducer is developed to show the feasibility of adjusting the working bandwidth. A case study of a passive system called as dog-bone structure was carried out to show that control range can be expanded by changing the dimension of the system. In addition, the piezoelectric constant and capacity also determine the control performance.