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In the present paper, analysis of an active dynamic vibration absorber (ADVA) is carried out. The ADVA is attached to the nonlinear primary system. The primary system consists of nonlinear spring and mass which is subjected to external harmonic excitation. The ADVA consists of a PZT actuator, spring, mass, and damper system. The external excitation on the primary system produces strain in the PZT actuator which produces voltage and this voltage is utilized by acceleration feedback control law to provide a counteracting force on the primary system to suppress its vibration. The governing equations of motion of the system have been obtained and the method of multiple scales is used to obtain the approximate solution of the system for superharmonic resonance condition. It is shown that with the application of controlling force the vibration of the primary system reduces for a broader range of operating frequency.
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