H. Doki et al., ACTIVE CONTROL OF CANTILEVERED PIPES CONVEYING FLUID WITH CONSTRAINTSON INPUT ENERGY, Journal of fluids and structures, 12(5), 1998, pp. 615-628
This paper deals with the stabilization of flutter in cantilevered pip
es conveying: fluid with constraints on input energy for control. The
controller in this study is designed by using an algorithm which itera
tively tunes the weighting matrix of the quadratic performance index i
n the LQG problem. This controller design method takes the performance
of the actuator into consideration. The theoretical and experimental
results show that the effectiveness of the controller in stabilizing f
lutter in cantilevered pipes conveying fluid varies according to the i
nput variance constraints, i.e., the difference in the dynamic range o
f an actuator. Furthermore, the critical flow velocity at instability
of the pipe can be estimated by the method stated in this paper, where
the system loses its stability because of the restriction of control
force produced by an actuator. (C) 1998 Academic Press.