【摘要】 本文基于主导峰(谷)思想提出了一种波形特征抽取和描述方法,这种方法能有效地抓住波形的主要特征.文中首先给出了主导峰(谷)的概念及识别算法.然后,根据柴油机喷油压力波形的特点,具体讨论了压力波形的符号化方法及步骤,并给出了描述实例.最后,简要分析了将这种方法进一步扩展而构造的波形特征层次树及其特点.更多还原

【Abstract】 Based on dominance peak (or valley), this paper introduces a method of feature extraction and representation of waveform by which the main feature is described effectly. The concept of dominance peak (or valley) and its recognition algorithm are presented. Then the symbolized means on pressure waveform of diesel fuel injection system is discussed. Finally, the characteristic of feature hierarchical tree on representation of wavoform by expanding this method is analysed.更多还原