Feasibility of Active Material Vibration Suppression in a Large Stroke Flexure Hinge

Flexure mechanisms are widely used in precision applications. The finite support stiffness results parasitic resonance frequencies, typically with low damping, that can be detrimental for positioning performance. Moreover, these resonances may vary over the workspace moderate or large deflection. In this paper we consider a model of stroke flexure hinge requires accurate end-effector positioning. feasibility damping using active material is investigated. It shown that, by placing piezoelectric patches at suitable locations on flexures, problematic sensed and actuated. Using modal decoupling vibration modes separated, whereafter positive position feedback control to suppress modes. By changing controller frequency as function nominal deformation, suppression entire achieved. improved mechanism transient simulations.