Parametric vibration stability and active control of nonlinear beams

doi:10.1007/s10483-012-1630-6

Abstract

Abstract: The vibration stability and the active control of the parametrically excited nonlinear beam structures are studied by using the piezoelectric material. The velocity feedback control algorithm is used to obtain the active damping. The cubic nonlinear equation of motion with damping is established by employing Hamilton’s principle. The multiple-scale method is used to solve the equation of motion, and the stable region is obtained. The effects of the control gain and the amplitude of the external force on the stable region and the amplitude-frequency curve are analyzed numerically. From the numerical results, it is seen that, with the increase in the feedback control gain, the axial force, to which the structure can be subjected, is increased, and in a certain scope, the structural active damping ratio is also increased. With the increase in the control gain, the response amplitude decreases gradually, but the required control voltage exists a peak value.

Key words: beam, piezoelectric material, parametric vibration, stability, active control, multiple-scale method, neutral differential equation, asymptotic, oscillation, continuous distributed delay

2010 MSC Number:

O322
O317

Feng-ming LI;Chun-chuan LIU . Parametric vibration stability and active control of nonlinear beams. Applied Mathematics and Mechanics (English Edition), 2012, 33(11): 1381-1392.

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