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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...
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Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
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When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
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基于灰色关系度的滚动轴承故障诊断方法

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概括

这项研究引入了一种新的故障诊断方法,用于使用灰色关系度分析的滚动轴承. 该技术提高了在整个运行寿命中识别轴承故障的准确性.

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科学领域:

  • 机械工程 机械工程
  • 信号处理 信号处理
  • 人工智能的人工智能

背景情况:

  • 滚动轴承是机器中的关键部件,它们的故障可能会导致大量停机时间和成本.
  • 在滚动轴承的整个生命周期中,准确的故障诊断仍然是一个具有挑战性的问题.
  • 现有的方法往往难以提取微妙的故障特征并保持高诊断准确度.

研究的目的:

  • 为滚动轴承提出一个可靠的故障诊断方法,适用于其整个使用寿命.
  • 提高轴承故障检测和分类的准确性和可靠性.
  • 为先进的状态监测和预测性维护策略提供参考.

主要方法:

  • 优化变量模式分解 (VMD) 参数使用基于减去平均值的优化器.
  • 使用优化VMD进行轴承振动信号的分解,并根据最小包裹取内在模式函数 (IMF) 来提取特征向量.
  • 基于标准距离的灰色近距离和相似关系度的权衡,计算灰色综合关系度.

主要成果:

  • 拟议的方法在XJTU-SY数据集上实现了95.24%的诊断准确率.
  • 与各种现有算法相比,证明了优越的诊断性能.
  • 成功诊断了滚动轴承的不同故障状态和程度.

结论:

  • 基于灰度关系的故障诊断方法在滚动轴承状况监测方面取得了重大进展.
  • 该方法有效地提取故障特征,并在轴承的整个生命周期中提高诊断准确性.
  • 这种方法为确保机械系统的可靠性和寿命提供了有价值的工具.