Vibration damping characteristics of the cork-based composite material in line to frequency analysis

Abstract

The conducted research suggests possibility of replacing extruded polystyrene with a renewable cork-based material in laminated composite structures. Different fractions of the cork-based material of a composite laminate have been applied. The composites have been tested employing a hammer-focused vibration method. Conforming to obtained results, the cork-based material of smaller fraction has damping properties similar to those of the extruded polystyrene composite. Integrating cork into the structure of the composite has the opportunity to develop a more eco-friendlier and sustainable product and to improve the adaptive properties of passive control systems used for vibration damping applications operating in the middle and high frequency zones.

Tracking-Differentiator-Based Position and Acceleration Feedback Control in Active Vibration Isolation with Electromagnetic Actuator

“…The vibration isolation system is mainly divided into passive vibration isolation systems and active vibration isolation systems (AVIS). Passive isolation is commonly achieved between the vibration source and the isolated object by introducing a material with known stiffness and damping characteristics [1,2]. Once the passive vibration isolation is designed, the vibration isolation bandwidth is predetermined, which is not easy to adjust, and the low-frequency vibration isolation performance is restricted.…”