Active vibration control using parametric impulsive feedback damping

Tehrani, Maryam Ghandchi (2018) Active vibration control using parametric impulsive feedback damping. In 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. vol. 2, International Institute of Acoustics and Vibration. pp. 731-738 .

Abstract

This paper presents active vibration control of a single degree-of-freedom mechanical oscillator using parametric impulsive damping force. A feedback control force with impulsive damping is generated to control the vibration of the system. It is shown that parametric impulsive damping can increase the power dissipation and can reduce the kinetic energy of the system significantly. First, the theory of active control with impulsive damping is presented. Then, numerical simulation is carried out on a system with initial velocity and the impulsive feedback force is applied to control its vibration. Then, the system with harmonic external forcing is considered and the equivalent linear feedback damping for the impulsive damping is derived analytically. Good agreement is achieved between numerical and analytical results. It is shown that there is an optimum impulsive gain, which can minimise the kinetic energy and maximise the power absorbed. Also, the effect of the frequency of impulses with respect to the frequency of external disturbance is also studied. Finally, the response of the system with impulsive feedback damping subject to random excitation is presented.

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