【摘要】 文中详细讨论了高阶累积量方法的特点和性质,分析了基于高阶累积量理论的相关信号处理技术,以及在处理随机信号非线性特性时独特的功能;研究了基于高阶累积量方法的振动信号分析处理技术,即双谱分析、112维谱分析以及双相干谱分析方法,分析了各自特点以及它们的估计算法;在此基础上,将其引入到机械传动齿轮系统的故障诊断分析之中,对系统的故障特征进行了提取并对故障类型进行了区分;对不同大小和不同类型故障的传动系统进行实验测试,采用高阶累积量进行特征提取识别,并对高阶累积量理论实际应用效果做了分析评价,表明这是一种较理想有前途的有效方法。更多还原

【Abstract】 Aim.Ref.8 by Lai et al on HOC fault detection and diagnosis of a gear system needs,in our opinion,to be refined.In the full paper,We explain our refinements in some detail;in this abstract,we just add some pertinent remarks to listing the two topics of explanation.The first topic is: HOCs and HOC spectrum.In this topic,we mention that HOC spectrum gives such information as phase,amplitude value,double-cycle and symmetry.The second topic is: HOC fault detection of a gear transmission system.In this topic,we did experiments on the vibration response detection of normal gears,gears with cracks at tooth roots,gears with cracks at pitch-circle and gears with tooth face abrasion at different rotating speeds of a running decelerator.Then we analyzed their bispectrum,bicoherence spectrum and 112 spectrum with HOCs.The experimental results and their analysis,shown in Figs.2 through 21 in the full paper,indicate preliminarily that the fault detection and diagnosis of the gears with HOCs are effective and more refined than those achievable by Ref.8’s method.更多还原