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通过对氢发动机异常燃烧现象的研究,指出压力信号包含了丰富的燃烧信息,提出应用小波变换法提取异常燃烧信息,对氢发动机正常燃烧和异常燃烧压力信号进行了小波包分解,提取出小波包能量。通过构造小波包能量特征向量,对氢发动机异常燃烧进行了有效诊断,为工程中实际应用提供了理论基础。
Based on the research on abnormal combustion of hydrogen engine, it is pointed out that the pressure signal contains abundant combustion information, and the wavelet information is extracted to extract the abnormal combustion information. The normal and abnormal combustion pressure signals of hydrogen engine are decomposed by wavelet packet, energy. By constructing the wavelet packet energy eigenvector, the abnormal combustion of hydrogen engine is effectively diagnosed, which provides a theoretical basis for the practical application in engineering.