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- W2525255855 abstract "An active silencer has been developed to attenuate combustion engine exhaust noise. The silencer consists of an electrically controlled valve connected to a buffer volume. The pulsating flow from the engine is buffered in the volume. The valve connected to it is controlled such that only the mean flow passes to the atmosphere. This flow is free from fluctuations and consequently free of sound. An iterative learning controller has been developed to control the active valve. In the control algorithm, non-causal filters are implemented. These filters allow to control systems with high dynamics over a broad frequency range. The active silencer has been experimentally validated on a cold engine simulator, which generates realistic exhaust noise and gas flow using compressed air. The exhaust noise has been reduced in a frequency range starting from 5 Hz until 800 Hz. Depending on the rotational speed of the engine, the typical reductions ranges from 13 dB to 24 dB." @default.
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- W2525255855 date "2009-05-20" @default.
- W2525255855 modified "2023-09-25" @default.
- W2525255855 title "Iterative learning control for an active exhaust noise attenuation valve for internal combustion engines" @default.
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- W2525255855 hasPublicationYear "2009" @default.
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