Characterization and selection of testing beam material for active vibration cancellation studies.

Active Vibration Cancellation (AVC) is a technique for an isolation system that reacts to the incoming external vibration or noise with an active counter actuation. A series of testing and investigation on the system are required before the deployment to the targeted system to increase the system efficacy. In this study, the dynamic properties of aluminium, stainless steel, and mild steel beam materials with similar dimension are studied using an Experimental Modal Analysis (EMA). The beam material with the least natural frequencies and better response within the frequency of interest from 0 Hz to 500 Hz is selected for the AVC studies. However, the implementation of piezoelectric patch actuator and testing rig can affect the mechanical properties of the AVC system. Thus, subsequent study is carried out on the beam dynamic properties to study the effect of the installation of piezoelectric patch and AVC testing setup using the EMA. From the results, it is proven that the aluminium beam produces the best dynamic properties and the inclusion of piezoelectric patch has shown a positive effect on the system dynamic while damped the peaks. The installation of testing setup has clearly shown that process largely affected and changed the mechanical properties of the AVC system negatively which require further mitigation solution. [ABSTRACT FROM AUTHOR]