ウェーブレット変換によるエンジンのノッキング診断(機械力学,計測,自動制御)

概要

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This paper proposes a new technique based on the wavelet transform to detect knock in one combustion cycle. The fast wavelet transform algorithm for knock detection is discussed. The cylinder pressure in a spark-ignition engine is analyzed using wavelet transform. The frequency characteristic of resonance mode with crank angle change can be distinguished using wavelet transform. In view of the fact that plural resonance modes could not occur at same time, a knock detection algorithm is proposed with the comparison of scale power spectrum of plural resonance modes at the same crank angle. The results of simulation and experiment show that this technique is simple to implement and may provide practical utility for real time diagnostics of combustion.
社団法人日本機械学会の論文
2003-12-25