Abstract
This paper presents an active control for stabilization of a cantilevered pipe conveying fluid using optimal output feedback controls with Piezoelectric actuators. The output feedback controls are more practical technique than the state feedback controls, but, on the other hand, the control performance is restricted within some limits. Therefore, in this paper, various properties of this control system are clarified by numerical simulation. By the output feedback controls, the pipe conveying fluid is stabilized effectively same as the state feedback. The location of the actuators is very important factor to construct an output feedback control system. Because the control system has no effective feedback gain for stabilization on the location and even if the gain exist, satisfactory stabilizing effects are not obtained. When the controlled system of the pipe conveying fluid has strong unstability, the system can not be stabilized by using the output feedback controls.
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