Study on Adaptive Control of Restrained Cantilever Pipe Conveying Fluid

Abstract:

The cantilever fluid conveying pipe which restrained by linear spring and cubic nonlinear spring at its free end was studied. Firstly, the model reference adaptive control system with parallel structural style was designed for the restrained cantilever pipe based on Lyapunov theory of stability. Then the vibration of the pipe system was under positive controlled making use of this adaptive control scheme. Lastly, the numerical simulating method was used to verify the effectivity of this control method and the influence of system parameters on control performance and control input energy were also investigated. The simulation results showed that the control effect of the control system was extremely distinct. In addition, the larger the Lyapunov function state feedback declinational gains were, the better the control effect had, and the shorter the required time that the controlled system entirely settled down needed. With the position of piezoelectric actuator moved to the pipe free end the required time that the controller entirely settled down would become longer and longer. Moreover, the effect of the length of piezoelectric actuator on the controlled system was relatively complicated, the required time that fluid conveying pipe system settled down and the control energy took on complicated variation regularities.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 1325-1335
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.1325
• Online since: January 2012
• Authors: Ri Dong Bao
• Keywords: Adaptive Control, Control Performance, MRACS, Restrained Cantilever Pipe Conveying Fluid

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