基于梯度自适应窗宽在变速机械阶比分析中的应用  

Gradient-based Adaptive Window-width and Its Application to Varying Speed Machinery Order Analysis

作　　者：李修文[1] 徐金梧[1] 阳建宏[1] 黎敏[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《仪表技术与传感器》2013年第1期68-71,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金(No.50905013;No.51004013);高等学校博士学科点专项科研基金(No.20090006120007);中央高校基本科研业务费专项资金(FRF-TP-09-014A)

摘　　要：由于转速频繁的改变,变速旋转设备的故障诊断必须解决转速的跟踪技术。传统方法是利用激光传感器获取转速脉冲,而时频分析方法由于不需要硬件得到较快发展,但频率分辨率较低,分析过程中的窗宽是固定的,不能根据转速变化快慢改变窗宽。文中提出了一种梯度自适应窗宽阶比分析算法,根据信号的梯度变化来自适应地选择窗宽,可以跟踪到更加准确的转频成分,有利于阶比分析,仿真和实际故障齿轮信号表明此方法具有较好的实际应用效果。Because of the frequent changes of the rotational speed, the speed tracking for varying speed rotating machinery fault diagnosis must be solved. The traditional method uses the laser sensor to obtain the speed pulse. The time-frequency analysis has developed fast because it does not require hardware devices, but the resolution is quite low. The window-width is changeless and it can not change during the analysis. This paper presented an order analysis method gradient-based adaptive window-width, which used the change of signal gradient to select the window-width adaptively. The algorithm can traced the rotation frequency more accurately, and is beneficial to the order analysis. The results of simulation and faulty gear show that the proposed methodology can achieve good practical application effect.

关 键 词：梯度 自适应窗宽 阶比分析 

分 类 号：TH133.3[机械工程—机械制造及自动化]