滚动轴承的早期故障检测 基于时间变化的过 实证模式分解和自适应的多点最佳最小透解卷调整
1Hubei Province Key Laboratory of System Science in Metallurgical Process, Wuhan University of Science and Technology, Wuhan 430081, China.
Entropy (Basel, Switzerland)
|October 28, 2023
概括
本研究引入了一种新的方法,它结合了多点最佳最小解卷调整 (MOMEDA) 和时间变化的过实证模式分解 (TVFEMD),用于在杂的环境中早期检测滚动轴承故障.
科学领域:
- 机械工程 机械工程
- 振动分析 振动分析
- 信号处理 信号处理
背景情况:
- 滚动轴承的早期故障检测对于防止灾难性故障至关重要.
- 强烈的背景噪音往往阻碍了传统方法的有效性,例如时间变化的过实证模式分解 (TVFEMD).
- 现有的方法在噪音条件下难以提取微妙的故障特征.
研究的目的:
- 提出一种新的,可靠的方法,用于早期检测滚动轴承的故障.
- 为了增强从被强大的背景噪声损坏的信号中提取故障特征.
- 提高轴承故障诊断的可靠性和准确性.
主要方法:
- 为从TVFEMD分解中选择有效的内在模式函数 (IMFs) 开发了一种新型加权的包膜频谱曲解指数.
- 合成冲击指数 (SII) 与灰狼优化算法一起用于优化多点最佳最小解卷调整 (MOMEDA) 参数 (故障期T,波长L).
- 优化的MOMEDA方法可自适应地过重建的信号,然后进行封面频谱分析以提取故障特征.
主要成果:
- 拟议的方法有效地从模拟和测量的滚动轴承信号中提取早期故障特征.
- 与古典方法相比,过的信号显示出明显更高的第一阶相关曲解 (FCK) 和故障特征系数 (FFC).
- 拟议的方法实现了较低的样本 (SE) 和封面频谱 (ESE),表明了优异的噪声抑制和功能增强.
结论:
- 结合TVFEMD和优化的MOMEDA方法,为滚动轴承的早期故障检测提供了可靠和有效的解决方案.
- 与FSK,MCKD和基本的TVFEMD-MOMEDA技术相比,这种方法在杂的环境中表现出更高的性能.
- 开发的指数和优化策略提高了轴承故障诊断的灵敏度和准确性.
相关概念视频
Bearings: Problem Solving
289
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...
289
Time-Domain Interpretation of PD Control
123
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
Consider the example of control of motor torque. Initially, a positive...
123
Relative Motion Analysis using Rotating Axes
471
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
471
Linear Approximation in Time Domain
85
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...
85
Journal Bearings
689
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...
689
Relative Motion Analysis using Rotating Axes-Problem Solving
407
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
407


