LQG control of piezoelectric smart truss

Abstract

Truss, in which one or more passive members are replaced by active members containing piezoelectric actuator, have high coefficient of the vibration damping and have simultaneously low mass. The active members enable a generation of the forces having an effect on selected nods in the truss. Such truss is called smart truss in literature. Expected effect of the active members application is a counteraction of the external influences on the truss, for example by wind. A project of the control algorithm of such smart truss is a difficult task, because it is MIMO control object. The control algorithms, which are based on the state space model, is a promising direction in the scientific research, because designed control lows take into account the displacements and speeds of all nods of the truss. This paper presents the results of simulation research of control system with the use of LQG algorithm for exemplary truss. The application of LQG algorithm in the smart truss control could influence the increase of the vibration damping of such structure.