| Summary: | 碩士 === 逢甲大學 === 機械工程學系 === 87 === In this paper, we investigate the method of fuzzy predictive control and its apply on active noise cancellation technique.
In the fuzzy predictive control, we focus on the process of nonlinear signal handling. We choose the fuzzy control to track the trajectory of nonlinear signal, and add the predictive control to predict the unknow signal. The signal processing includes the wave compensation and the frequency correction . Based on these techniques , we can generate a wave like the noise which we want to cancel. In the active noise cancellation, we integrate the computer, interface, and some microelectronic circuits to a system which can receive or emit sound wave. With the hardware and software techniques, we can get the same sound wave as the noise, but the phase of the sound wave is inverted. The sound wave is defined as the noise cancellation signal. That can be used to cancel the noise signal.
The effectiveness of the proposed method is supported by the experimental results, excluding those for the random and unpredictable high frequency noise.
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