VIBRATION SUPPRESSION OF A ROTATING FLEXIBLE CANTILEVER PIPE CONVEYING FLUID USING PIEZOELECTRIC LAYERS

Authors

  • VAHID AZADI SHIRAZ BRANCH, ISLAMIC AZAD UNIVERSITY
  • SALAR KHAJEHPOUR SHIRAZ BRANCH, ISLAMIC AZAD UNIVERSITY

Keywords:

ROTATING FLEXIBLE PIPE, CANTILEVER PIPE CONVEYING FLUID, PIEZOELECTRIC LAYERS, ADAPTIVE-ROBUST CONTROL SCHEME

Abstract

IN THIS STUDY, THE GOVERNING EQUATIONS OF A ROTATING CANTILEVER PIPE CONVEYING FLUID ARE DERIVED AND THE LONGITUDINAL AND LATERAL INDUCED VIBRATIONS ARE CONTROLLED. THE PIPE CONSIDERED AS AN EULER BERNOULLI BEAM WITH TIP MASS WHICH PIEZOELECTRIC LAYERS ATTACHED BOTH SIDE OF IT AS SENSORS AND ACTUATORS. THE FOLLOWER FORCE DUE TO THE FLUID DISCHARGE CAUSES BOTH CONSERVATIVE AND NON-CONSERVATIVE WORK. FOR MATHEMATICAL MODELING, THE LAGRANGEÂRAYLEIGHÂRITZ TECHNIQUE IS UTILIZED. AN ADAPTIVE-ROBUST CONTROL SCHEME IS APPLIED TO SUPPRESS THE VIBRATION OF THE PIPE. THE ADAPTIVE-ROBUST CONTROL METHOD IS ROBUST AGAINST PARAMETER UNCERTAINTIES AND DISTURBANCES. FINALLY, THE SYSTEM IS SIMULATED AND THE EFFECTS OF VARYING PARAMETERS ARE STUDIED. THE SIMULATION RESULTS SHOW THE EXCELLENT PERFORMANCE OF THE CONTROLLER.

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Published

2015-04-10

Issue

Vol. 12 No. 6 (2015)

Section

Articles

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