Optimal control of active structures with piezoelectric modal sensors and actuators

Independent modal space control (IMSC) is adopted in this paper for vibration control of piezoelectric active structures. Single-mode controllability and observability conditions are presented. A set of modal sensors and actuators is proposed. Although they are to some extent approximate when compared to those developed previously, their design and application are much simpler. Numerical results are shown to illustrate the feasibility of the approximate modal sensors and actuators.