机械科学与技术2001，Vol.20Issue(3)：373-375,3.
离散振动信号分形盒维数的改进算法和应用
Fractal Box Dimension of Discrete Vibration Signals: Improved Algorithm and Applications
摘要
Abstract
Fractal Box Dimension(BD), which can represent self-similarity and complexity of nonstationary vibration signal, provides a new tool for fault diagnosis of mechanical equipment. In this paper, we first analyze the shortcoming of conventional method for calculating BD of discrete vibration signal. Then we propose an improved algorithm of BD which include two key technologies. First, square box is replaced with rectangle box due to the bi-scale characteristic of vibration signal. Second, an empirical formula is derived for choosing scale-invariant region of periodic or quasi-periodic signals. Experimental results show that the improved algorithm of BD is simple and effective. As a successful application, BD is used to detect looseness fault in bearing bushing of turbo-generator set.关键词
离散振动信号/双尺度/无标度区/盒维数/故障诊断分类
机械制造引用本文复制引用
訾艳阳,胥永刚,何正嘉..离散振动信号分形盒维数的改进算法和应用[J].机械科学与技术,2001,20(3):373-375,3.基金项目
国家自然科学基金资助项目(59775023)；陕西省自然科学研究计划项目(97G14) （59775023）
