滚动轴承的故障特征提取方法基于完整的集体实证模式分解与自适应噪声和变化模式分解
Lijing Wang1, Hongjiang Li1, Tao Xi2
1School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China.
Sensors (Basel, Switzerland)
|December 9, 2023
概括
这项研究引入了一种新的方法,用于使用CEEMDAN和VMD技术组合检测滚动轴承的弱故障. 这种方法增强了从杂,复杂的振动信号中提取故障特征.
科学领域:
- 机械工程 机械工程
- 振动分析 振动分析
- 状态监控 状态监控
背景情况:
- 传统的单一分解方法与非静止和非线性振动信号作斗争,阻碍在噪音环境中提取弱断裂特征.
- 从复杂的机械振动中提取微妙的故障信号,特别是在滚动轴承中,仍然是预测性维护的一个重大挑战.
研究的目的:
- 为滚动轴承提出一种先进的故障特征提取方法,克服单个分解技术的局限性.
- 为了提高在具有挑战性的振动数据中识别弱故障特征的准确性和可靠性.
主要方法:
- 使用完整的集体实证模式分解与自适应噪声 (CEEMDAN) 进行初始信号分解.
- 利用基于组件外曲解的信号选和重建.
- 应用变化模式分解 (VMD),通过Sparrow搜索算法 (SSA) 进行自适应优化,使用信封光谱曲解作为适应性函数,以分解重建的信号.
- 根据信封光谱曲解来选择最佳组件,用于信封解调分析.
主要成果:
- 提出的CEEMDAN-VMD方法成功地将信号分解为相关的内在模式函数 (IMF).
- 封面曲解和封面光谱曲解被证明是有效的组件选择指数.
- 使用开放数据集和实验数据的验证证实了该方法的准确性和优越性.
结论:
- 合并的CEEMDAN-VMD方法提供了一个强大的解决方案,用于从滚动轴承的振动信号中提取弱故障特征.
- 使用SSA的自适应参数优化显著改善了VMD分解和随后的特征提取.
- 与传统方法相比,这种方法在识别轴承故障方面表现更好.
相关概念视频
Bearings: Problem Solving
285
Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
285
Residual Stresses in Circular Shafts
177
In materials that exhibit elastic and plastic behavior, known as elastoplastic materials, residual stresses can accumulate when these materials experience plastic deformation. This deformation arises from either high levels of shearing stress or significant strains. Residual stresses are internal stresses that persist within a material after removing the external force causing deformation. This phenomenon is demonstrated when observing the behavior of a shaft under torque; notably, the...
177
Journal Bearings
676
Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
To better understand the concept of journal bearings, consider a rope winch with dry or...
676
Bearing Stress
836
Bearing stress refers to the contact pressure between two separate bodies. To visualize this, imagine a bolt thrust through a plate. The bolt applies a force to the plate, which exerts an equal but opposite force back onto the bolt. This force isn't just a singular entity but a compilation of numerous smaller forces distributed across the contact surface between the bolt and the plate.
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
836
Vector Algebra: Method of Components
13.9K
It is cumbersome to find the magnitudes of vectors using the parallelogram rule or using the graphical method to perform mathematical operations like addition, subtraction, and multiplication. There are two ways to circumvent this algebraic complexity. One way is to draw the vectors to scale, as in navigation, and read approximate vector lengths and angles (directions) from the graphs. The other way is to use the method of components.
In many applications, the magnitudes and directions of...
In many applications, the magnitudes and directions of...
13.9K
Collar Bearings
1.3K
Collar bearings are essential in various machines designed to support axial loads on rotating shafts. Depending on the specific application and requirements, they can be found with single or multiple collars.
1.3K


