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- W2912242488 abstract "A muffler attached to an engine attenuates sound over a dedicated frequency range. This research involves the development of an active muffler that is keyed to the revolutions per minute (rpm) of the engine and suppresses the fundamental frequency being exhausted through the tailpipe. The Electromechanical Active Helmholtz Resonator (EMAHR) is an active muffler consisting of a tracking side-branch resonator terminated with a composite piezoelectric transducer. The EMAHR creates a notch that can be moved between 200-1000 Hz. In order to move the notch an impedance is generated consisting of negative capacitance, an inductance varying from positive to negative, and positive or negative resistance. Described in this paper is the required electrical load for varying the resonant frequency of a composite piezoelectric transducer, and the development and selection of a digital filter that is implemented in an impedance generation circuit. In the derivation of the digital filter, a backward Euler and bilinear transform approximations are used to develop an appropriate filter. Through simulation analysis of these filters, the bilinear transformed filter is the appropriate selection for the application." @default.
- W2912242488 created "2019-02-21" @default.
- W2912242488 creator A5056267368 @default.
- W2912242488 creator A5076832998 @default.
- W2912242488 date "2018-08-01" @default.
- W2912242488 modified "2023-09-23" @default.
- W2912242488 title "Load Impedance Digital Filter for Tuning the Resonance of a Composite Piezoelectric Transducer" @default.
- W2912242488 cites W1766888123 @default.
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- W2912242488 doi "https://doi.org/10.1109/mwscas.2018.8623968" @default.
- W2912242488 hasPublicationYear "2018" @default.
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