VIBRATIONS OF STIFFENED COMPOSITE PANELS WITH SMART MATERIALS

Abstract eng:
The feasibility of using electrorheological (ER) fluids and self-sensing piezoelectric (PZT) actuators to control structural vibrations of stiffened composite panels subjected to wide-band random inputs is investigated. A collocated velocity feedback control mechanism is integrated using piezoelectric materials as sensors and actuators. Control of structural dynamic characteristics is introduced by electrorheological fluids located in the stiffeners. The transfer matrix method and optimal control theory are used to determine the vibration response of the panel system. Numerical results are presented to demonstrate the extent of vibration control by piezoelectric devices and electrorheological fluids and collocated feedback is compared to digital stochastic control.

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