Active Control of Cantilevered Pipes Conveying Fluid : Stabilization with Constraint on Input Energy

• Published in: Transactions of the Japan Society of Mechanical Engineers Series C Vol. 62; no. 604; pp. 4507 - 4512
• Main Authors: DOKI, Hitoshi, HIRAMOTO, Kazuhiko, AKUTSU, Hiroyuki
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 25.12.1996
• Subjects: Active Control; Flow-Induced Vibration; Fluid-Conveying Pipe; Flutter; Input Variance Constraint; Stabilization
• ISSN: 0387-5024; 1884-8354
• DOI: 10.1299/kikaic.62.4507

We presents an active control of cantilevered pipes conveying fluid with constraint on input energy. The controller used in this study is designed with constraints on input energy variances. LQG control law is used to obtain the feedback controller. This controller design method takes the performance of the actuator into consideration. The control object which consists of a pipe system and an actuator is modeled mathematically by the Galerkin method. The experimental setup consists of the pipe system, a laser sensor, an A/D converter, a personal computer, a D/A converter, and a DC servomotor which produces a transverse force for active control of the pipe. The experimental results show that the effectiveness of the controller in stabilizing unstable phenomena of cantilevered pipes conveying fluid varies according to the conditions of input variance constraints.