Vibration control of active structures with piezoelectric modal sensors and actuators

摘要

The finite element method (FEM) is applied to model the sensing and actuating mechanism of piezoelectric sensors and actuators. With the aid of Independent Modal Space Control (IMSC) method, optimal design of vibration control of active structures is performed. And the controllability and observability conditions for single mode are presented. Based on the IMSC method, a new set of modal sensor and actuator is proposed which consist of several piezoelectric patches. Although they are to some extent approximate when compared to those developed by lee and Moon, design and application of them are much simpler. Numerical results are presented to illustrate the feasibility of the developed approximate modal sensors and actuators.