The application of an active Helmholtz resonator to an intake system

TL;DRAbstract

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.

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