A novel active noise control (ANC) technique using adaptive frequency multiplier circuit for blade passing frequency (BPF) noise of centrifugal fan and harmonic noise of engine exhaust system is proposed. The proposed ANC system is based on the well-known adaptive controller with filtered-x least-mean-square (FXLMS) using variable step size convergence technique. The proposed controller is realised on finite impulse response (FIR) filter and implemented by using a TMS320C32 digital signal processor (DSP) with reference signal from optical fibre sensor and frequency multiplier circuit. Experiments are carried out to evaluate the noise attenuation of the proposed ANC system for centrifugal fan and engine exhaust system. The experimental results indicate that the frequency multiplier circuit could improve the performance in reducing the noise at the BPF of centrifugal fan and periodic noice of exhaust system.


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    Title :

    Implementation of adaptive harmonic noise controller for engine exhaust system noise controller for engine exhaust system with frequency multiplier circuit


    Additional title:

    Einführung eines harmonischen Adaptivschallreglers für Auspuffanlagen mit Frequenzvervielfacher


    Contributors:
    Wu, Jian-Da (author) / Lin, Hai-Ping (author) / Lee, Tian-Hua (author)

    Published in:

    Publication date :

    2004


    Size :

    14 Seiten, 9 Bilder, 2 Tabellen, 11 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English







    Engine Exhaust Noise Test Facility

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    Patrick, H. V. L. / Tada, H. | British Library Conference Proceedings | 2001