ACTIVE CONTROL OF STRUCTURE-BORNE ROAD NOISE USING VIBRATION ACTUATORS

Structure-borne road noise is generated by road induced excitation for ces. The control approach presented here relies on the use of vibratio n actuators to modify the vibration behavior of the cal body such that its noise radiation efficiency is decreased (Active Structural Acoust ic Control-ASAC). The controller is optimized using laboratory experim ents and numerical tools to simulate the performance a complete vehicl e control set-rep. Road tests yield a 6.9 dB noise reduction in the fr equency range 75-105 Hz at the error microphone and 6.1 dB noise reduc tion at the passenger's ear.