Design of Intelligent Thin-Walled Composite Beams
This paper reports a further study on the design of intelligent thin-walled composite beams using piezoelectric materials to actively control their transient vibrations. A theorem of sensibility is proved to establish the sensibility of modal vibration by distributed sensors. In the case of non-exact sensing, a sensing residual is defined to quantify the error in motion sensing. Distributed actuators are designed based on the principle of moment excitation. Actuating spill over is also defined to quantify the error in motion actuation. A theorem of sensing residual is discovered, which reveals the physical nature of the sensing residual and its effect on active controlling process. An application example is presented.