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Transmission Shafts: Problem Solving01:09

Transmission Shafts: Problem Solving

484
Designing a solid shaft that transmits power from a motor to a machine tool involves a series of calculations to ensure the shaft can withstand the stresses applied by bending moments and torques. First, calculate the torque exerted on the gear, considering the power transmitted by the shaft and its rotational speed. Following this, compute the tangential forces acting on the gears, which directly relate to the torque and the gear radius.
Next, use bending moment diagrams for the shaft to...
484
Design of Transmission Shafts - Stress Analysis01:15

Design of Transmission Shafts - Stress Analysis

706
Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
706
Multimachine Stability01:25

Multimachine Stability

539
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
539
Design of Transmission Shafts01:16

Design of Transmission Shafts

732
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by reconfiguring the...
732
Screw: Problem Solving01:21

Screw: Problem Solving

683
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
683
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

693
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...
693

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相关实验视频

Updated: Jan 13, 2026

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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一种基于Blaschke的多变量模式分解方法用于轮故障诊断.

Xianbin Zheng1, Zhengyang Cheng1, Junsheng Cheng1

  • 1College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China.

Sensors (Basel, Switzerland)
|October 29, 2025
PubMed
概括

一种新的基于Blaschke的多变量模式分解 (MBMD) 方法通过整合多变量振动信号来改善轮系统故障诊断. 这种方法增强了机械故障特征的提取,并提供比现有技术更准确的诊断结果.

科学领域:

  • 机械工程 机械工程
  • 信号处理 信号处理
  • 状态监控 状态监控

背景情况:

  • 现有的多变量信号分解方法缺乏对轮系统的机械洞察力,阻碍了有效的故障特征提取.
  • 轮系统的准确故障诊断对于防止灾难性故障和确保运行可靠性至关重要.

研究的目的:

  • 提出一种新的基于Blaschke的多变量模式分解 (MBMD) 方法,用于增强轮系统故障诊断.
  • 通过将轮系统的机械特性纳入信号分解来解决当前方法的局限性.

主要方法:

  • 模拟多变量振动信号作为多维轮系统响应.
  • 利用静态适应里埃分解 (SAFD) 通过布拉什克产品来表示信号,从而实现适应性的多通道信息融合.
  • 介绍了Blaschke多光谱和用于模态对齐和频谱分割的联合光谱分割算法.
  • 采用以投票为基础的过器银行,通过轮故障机制获取信息,以抑制噪音和功能增强.

主要成果:

  • MBMD有效地整合了来自轮系统振动的多变量信息.
  • 与现有技术相比,拟议的方法在断层特征提取方面表现出优异的性能.
  • 实验验证证了MBMD在轮故障诊断中的有效性.
关键词:
基于Blaschke的多变量模式分解功能提取 特性提取轮故障诊断 轮故障诊断 轮故障诊断联合频谱细分 联合频谱细分随机自适应的福里埃分解

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结论:

  • MBMD为轮系统的机械故障诊断提供了一种新且有效的方法.
  • 该方法能够整合多变量信息并考虑机械特性,从而更准确地检测故障.
  • MBMD为推进旋转机械的状态监测和诊断提供了一个新的视角.