The application of an active Helmholtz resonator to an intake system

Other conference contribution, 2013

Active control of sound and vibration can be utilised for tailoring the interior or exterior sound of vehicles. In contrary to passive systems it allows a high flexibility and eventually less space, especially when focusing on low frequencies. This paper deals with the application of an active Helmholtz resonator for the intake system of a two-cylinder engine. The application is tested in an experimental set-up where an adaptive harmonic feed-forward controller is designed. The reference signal is obtained from the tacho-signal of the engine. Different approaches for the decoder are discussed together with performance of the controller in different situations.