Piezo-Actuated Hydraulic Transducer for Active Noise Reduction

Fachgebiet:

Hydraulische Energieversorgung

Jahr:

2014

Art der Publikation:

Paper

Schlagworte:

Hydraulic System Noise, Fluid-Borne Noise FBN, Active Attenuation, Piezo Actuator, Membrane

Autoren:

K. Lentner, Arne Waitschat, F. Hermle, M. Christmann, F. Thielecke, R. M. Behr

Buchtitel:

International Conference and Exhibition on New Actuators and Drive Systems (ACTUATOR’14)

In modern aircraft hydraulic systems the hydraulic pressure is generated by axial piston pumps. Those pumps also induce unwanted fluid-borne noise (pressure ripple) and herewith structure-borne noise (vibrations). This paper introduces an electrically powered and frequency adaptable noise attenuation device. A piezo ceramic actuator was used as active component. Simulations were done using a numerical optimization process to maximize the output ripple (anti-phase to piston pump ripple). Besides, a prototype was tested in a dedicated fluid-borne noise test bench.