Motion and Vibration Control

pp 155-164

Active Vibration Control of Multibody Rolling Contact System

  • Veli-Matti JärvenpääAffiliated withDepartment of Mechanics and Design, Tampere University of Technology
  • , Lihong YuanAffiliated withDepartment of Mechanics and Design, Tampere University of Technology

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The aim of this work is to use multibody analysis to study rolling contact vibrations and then test the active control methods to eliminate these vibrations. The system considered is the rolling contact of two metal rolls. The contact is softened by using a thin polymer coating on one roll. The polymer cover generates a regenerative vibration source to the contact because the polymer does not recover fully before re-entering to the contact. This phenomenon creates a limit cycle vibration condition to the contact. The modeling of the system is based on the multibody dynamics. The metal rolls are modeled as super elements by using multibody equations and the component mode synthesis approach. The polymer cover is modeled analytically by giving an expression for the contact line load. The nonlinear stiffness of the cover is included. The regenerative vibration source is introduced to the system as a time delay term in the line load equations. The time domain responses are solved by using numerical time integration. The active vibration control is carried out by introducing external force actuators into the multibody model. The strategy is to create a feedback force with same magnitude and an opposite phase as the regenerative vibration source. As results the time domain responses of several different cases are compared and discussed.