基于Weibull分布的岸桥铰点退化特征提取方法研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (22) : 198-203.

论文

侯美慧 , 胡雄 , 王冰 , 孙德建

作者信息 +

Degradation feature extraction for the ship-to-shore crane turning point based on Weibull distribution

HOU Meihui,HU Xiong,WANG Bing,SUN Dejian

Author information +

文章历史 +

摘要

港口岸桥结构复杂，铰点是小车轨道的关键连接部件。长期承受高速、重载下装卸作业带来的冲击，铰点振动信号具有明显的非线性与非平稳特征。为了准确分析岸桥铰点的性能退化状态，提出一种基于Weibull分布的铰点退化特征提取方法。该方法首先采用局部最小值法滤除本底噪声，然后对去噪后的数据建立Weibull分布模型，并应用EDF统计量验证分布的可靠性。提取Weibull分布模型的尺度参数和形状参数，以此作为铰点的性能退化特征参数。采用实际工况下采集的全寿命铰点振动信号进行实例分析，结果表明了该方法的有效性。

Abstract

The structure of the ship-to-shore (STS) crane is complex and the turning point is the key connection component to the trolley structure. The turning point vibration signal is of nonlinear and non-stationary characteristics evidently because of the long-term impact under high-speed heavy loading and unloading operations. Aiming at analyzing the performance degradation condition accurately, a degradation feature extraction method based on Weibull distribution was proposed. The local minimum method was used to filter out the background noise, then a Weibull model, was established and the EDF statistics was employed to verify the reliability of the distribution. The scale parameters and shape parameters were extracted and adopted as characteristic parameters. The whole lifetime test data of a turning point under actual working conditions were taken in an examplic analysis, the results show the effectiveness of the method.

导出引用

侯美慧,胡雄,王冰,孙德建. 基于Weibull分布的岸桥铰点退化特征提取方法研究[J]. 振动与冲击, 2019, 38(22): 198-203

HOU Meihui,HU Xiong,WANG Bing,SUN Dejian. Degradation feature extraction for the ship-to-shore crane turning point based on Weibull distribution[J]. Journal of Vibration and Shock, 2019, 38(22): 198-203

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